An example of simply atrocious code
Holy crap... I honestly cannot believe that someone coded this. It's like there was an earthquake in the block diagram and the programmer was on LSD. It seems more like he was trying to paint a picture rather than write code. There is literally subVI that takes a string of nubmers, indexes each item in a string, converts that digit to I32, then multiplies by 10^x to create an array. Then he sums the array. It's absurd. Here's what I mean:
And I've just been tasked with finding one little subVI and updating it for our new oven controller. Joy.
And here's about 1/2 the diagram:
God help me...
Wow. Your example of Rube Goldberg could have been totally done with a node that was used in the Rube Goldberg (string to number).
Cheer up. My first inherited code looked a lot like that. I was still in my LabVIEW infancy, but I claimed that I could spend a week fixing the code or totally rewrite it in a day. I was allowed totally rewrite it and I had an initial coding done in the day. I spent another day fixing small bugs. I doubt you are that lucky right now. But think of this as a chance to show people what NOT to do.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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I also received a message like you. In my case I forgot to redirect the
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Updated : No question, just example web cam capture code
Hi,
I posted this example a while back, but it had some cosmetic bugs in it.
Here's an updated version.
Quick Start
1. Install JMF 2.1.1e (performance pack version)
( see imports list in source code if you really want to run it using the older version 2.1.1c )
2. You have to set the JMF_HOME or JMFHOME environment variable. Can't remember which one.
"Nearly sure" it's JMF_HOME.
3. Connect your camera
4. run jmfinit ( may need to do a few times until it detects your camera )
When it does, you're in business, and you can try to run the code
5. Run java -cp .;%JMF_HOME%\lib\jmf.jar JWebCam
known issue
Under Java 1.5 / 5 - When capturing a frame, and then resizing that snapshots JFrame, the image did not always scale up and display.
That does work under Java 1.3.1_06 .
Tested on Win98 2nd edition, Java 1.3.1_06, and Creative Web Cam Pro.
Legal stuff in plain english : This code is available for use by everyone, personal or commercial, no need to mention me in licenses or anything. It's just a demo I knocked up for myself. So I am under no obligation to support this. Use it at your own risk.... that implies you can't blame or sue me for anything that goes wrong.
If you like the code, I'd be happy to hear whereabouts you are in the world :-)
Also note : this is the limits of my JMF experience at present.
If you've a separate question, post it to a new topic!
regards,
Owen ( Dublin, Ireland )
import javax.swing.*;
import javax.swing.border.*;
import java.io.*;
import javax.media.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.util.*;
import javax.media.control.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
// import com.sun.media.vfw.VFWCapture; // JMF 2.1.1c version
import com.sun.media.protocol.vfw.VFWCapture; // JMF 2.1.1e version
public class JWebCam extends JFrame
implements WindowListener, ComponentListener
protected final static int MIN_WIDTH = 100; // 320;
protected final static int MIN_HEIGHT = 100; // 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected JPanel visualContainer = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
protected MyCaptureDeviceInfo[] myCaptureDevices = null;
protected boolean initialised = false;
* Constructor
public JWebCam ( String frameTitle )
super ( frameTitle );
try
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
catch ( Exception cnfe )
System.out.println ("Note : Cannot load look and feel settings");
setSize ( 320, 260 ); // default size...
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
visualContainer = new JPanel();
visualContainer.setLayout ( new BorderLayout() );
getContentPane().add ( visualContainer, BorderLayout.CENTER );
statusBar = new JLabel ("")
// Nasty bug workaround
// The minimum JLabel size was determined by the text in the status bar
// So the layoutmanager wouldn't shrink the window for the video image
public Dimension getPreferredSize ( )
// get the JLabel to "allow" a minimum of 10 pixels width
// not to work out the minimum size from the text length
return ( new Dimension ( 10, super.getPreferredSize().height ) );
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
* Initialise
* @returns true if web cam is detected
public boolean initialise ( )
throws Exception
MyCaptureDeviceInfo[] cams = autoDetect();
if ( cams.length > 0 )
if ( cams.length == 1 )
System.out.println ("Note : 1 web cam detected");
return ( initialise ( cams[0].capDevInfo ) );
else
System.out.println ("Note : " + cams.length + " web cams detected");
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
cams, // videoFormats,
cams[0] );
if ( selected != null )
return ( initialise ( ((MyCaptureDeviceInfo)selected).capDevInfo ) );
else
return ( initialise ( null ) );
else
return ( initialise ( null ) );
* Initialise
* @params _deviceInfo, specific web cam device if not autodetected
* @returns true if web cam is detected
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
statusBar.setText ( "Initialising...");
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
ml = webCamDeviceInfo.getLocator();
if ( ml != null )
player = Manager.createRealizedPlayer ( ml );
if ( player != null )
player.start();
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i<videoFormats.length; i++ )
myFormatList[i] = new MyVideoFormat ( (VideoFormat)videoFormats[i] );
Format currFormat = formatControl.getFormat();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
if ( currFormat instanceof VideoFormat )
currentFormat = (VideoFormat)currFormat;
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.err.println ("Error : Cannot get current video format");
invalidate();
pack();
return ( true );
else
System.err.println ("Error : Could not get visual component");
return ( false );
else
System.err.println ("Error : Cannot create player");
statusBar.setText ( "Cannot create player" );
return ( false );
else
System.err.println ("Error : No MediaLocator for " + webCamDeviceInfo.getName() );
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( false );
catch ( IOException ioEx )
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
catch ( NoPlayerException npex )
statusBar.setText ("Cannot create player");
return ( false );
catch ( CannotRealizeException nre )
statusBar.setText ( "Cannot realize player");
return ( false );
else
return ( false );
* Dynamically create menu items
* @returns the device info object if found, null otherwise
public void setFormat ( VideoFormat selectedFormat )
if ( formatControl != null )
// player.stop(); // not needed and big performance hit
currentFormat = selectedFormat;
if ( visualComponent != null )
visualContainer.remove ( visualComponent );
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
statusBar.setText ( "Format : " + currentFormat );
System.out.println ("Format : " + currentFormat );
formatControl.setFormat ( currentFormat );
// player.start(); // not needed and big performance hit
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
invalidate(); // let the layout manager work out the sizes
pack();
else
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
public VideoFormat getFormat ( )
return ( currentFormat );
protected void setUpToolBar ( )
toolbar = new JToolBar();
// Note : due to cosmetic glitches when undocking and docking the toolbar,
// I've set this to false.
toolbar.setFloatable(false);
// Note : If you supply the 16 x 16 bitmaps then you can replace
// the commented line in the MyToolBarAction constructor
formatButton = new MyToolBarAction ( "Resolution", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
protected void toolbarHandler ( MyToolBarAction actionBtn )
if ( actionBtn == formatButton )
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
setFormat ( ((MyVideoFormat)selected).format );
else if ( actionBtn == captureButton )
Image photo = grabFrameImage ( );
if ( photo != null )
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
else
System.err.println ("Error : Could not grab frame");
* autoDetects the first web camera in the system
* searches for video for windows ( vfw ) capture devices
* @returns the device info object if found, null otherwise
public MyCaptureDeviceInfo[] autoDetect ( )
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
String name;
Vector capDevices = new Vector();
if ( list != null )
for ( int i=0; i<list.size(); i++ )
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
System.out.println ("DeviceManager List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
else
for ( int i = 0; i < 10; i++ )
try
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
System.out.println ("VFW Autodetect List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
catch ( Exception ioEx )
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
MyCaptureDeviceInfo[] detected = new MyCaptureDeviceInfo[ capDevices.size() ];
for ( int i=0; i<capDevices.size(); i++ )
detected[i] = (MyCaptureDeviceInfo)capDevices.elementAt ( i );
return ( detected );
* deviceInfo
* @note outputs text information
public void deviceInfo ( )
if ( webCamDeviceInfo != null )
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
for ( int i=0; i<formats.length; i++ )
Format aFormat = formats;
if ( aFormat instanceof VideoFormat )
Dimension dim = ((VideoFormat)aFormat).getSize();
// System.out.println ("Video Format " + i + " : " + formats[i].getEncoding() + ", " + dim.width + " x " + dim.height );
else
System.out.println ("Error : No web cam detected");
* grabs a frame's buffer from the web cam / device
* @returns A frames buffer
public Buffer grabFrameBuffer ( )
if ( player != null )
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
if ( fgc != null )
return ( fgc.grabFrame() );
else
System.err.println ("Error : FrameGrabbingControl is null");
return ( null );
else
System.err.println ("Error : Player is null");
return ( null );
* grabs a frame's buffer, as an image, from the web cam / device
* @returns A frames buffer as an image
public Image grabFrameImage ( )
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
if ( btoi != null )
Image image = btoi.createImage ( buffer );
if ( image != null )
return ( image );
else
System.err.println ("Error : BufferToImage cannot convert buffer");
return ( null );
else
System.err.println ("Error : cannot create BufferToImage instance");
return ( null );
else
System.out.println ("Error : Buffer grabbed is null");
return ( null );
* Closes and cleans up the player
public void playerClose ( )
if ( player != null )
player.close();
player.deallocate();
player = null;
public void windowClosing ( WindowEvent e )
playerClose();
System.exit ( 1 );
public void componentResized ( ComponentEvent e )
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
dim.width = MIN_WIDTH;
mustResize = true;
if ( dim.height < MIN_HEIGHT )
dim.height = MIN_HEIGHT;
mustResize = true;
if ( mustResize )
setSize ( dim );
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
playerClose();
super.finalize();
class MyToolBarAction extends AbstractAction
public MyToolBarAction ( String name, String imagefile )
// Note : Use version this if you supply your own toolbar icons
// super ( name, new ImageIcon ( imagefile ) );
super ( name );
public void actionPerformed ( ActionEvent event )
toolbarHandler ( this );
class MyVideoFormat
public VideoFormat format;
public MyVideoFormat ( VideoFormat format )
this.format = format;
public String toString ( )
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
class MyCaptureDeviceInfo
public CaptureDeviceInfo capDevInfo;
public MyCaptureDeviceInfo ( CaptureDeviceInfo devInfo )
capDevInfo = devInfo;
public String toString ( )
return ( capDevInfo.getName() );
class MySnapshot extends JFrame implements ImageObserver
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DISPOSE_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
public void windowClosing ( WindowEvent e )
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
if ( saveJPEG ( filename ) )
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
else
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
else
setVisible ( false );
dispose();
setVisible ( true );
public void paint ( Graphics g )
super.paint ( g );
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), Color.black, this );
* Saves an image as a JPEG
* @params the image to save
* @params the filename to save the image as
public boolean saveJPEG ( String filename )
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false ); // 100% high quality setting, no compression
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
catch ( Exception ex )
System.out.println ("Error saving JPEG : " + ex.getMessage() );
return ( saved );
} // of MySnapshot
public static void main (String[] args )
try
JWebCam myWebCam = new JWebCam ( "Web Cam Capture" );
myWebCam.setVisible ( true );
if ( !myWebCam.initialise() )
System.out.println ("Web Cam not detected / initialised");
catch ( Exception ex )
ex.printStackTrace();Hi,
Here's a working version.
If there are no spaces after the "<" symbol, it thinks it's a HTML tag.
Putting spaces in, stops this.
cheers,
Owen
import javax.swing.*;
import javax.swing.border.*;
import java.io.*;
import javax.media.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.util.*;
import javax.media.control.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
// import com.sun.media.vfw.VFWCapture; // JMF 2.1.1c version
import com.sun.media.protocol.vfw.VFWCapture; // JMF 2.1.1e version
public class JWebCam extends JFrame
implements WindowListener, ComponentListener
protected final static int MIN_WIDTH = 100; // 320;
protected final static int MIN_HEIGHT = 100; // 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected JPanel visualContainer = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
protected MyCaptureDeviceInfo[] myCaptureDevices = null;
protected boolean initialised = false;
* Constructor
public JWebCam ( String frameTitle )
super ( frameTitle );
try
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
catch ( Exception cnfe )
System.out.println ("Note : Cannot load look and feel settings");
setSize ( 320, 260 ); // default size...
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
visualContainer = new JPanel();
visualContainer.setLayout ( new BorderLayout() );
getContentPane().add ( visualContainer, BorderLayout.CENTER );
statusBar = new JLabel ("")
// Nasty bug workaround
// The minimum JLabel size was determined by the text in the status bar
// So the layoutmanager wouldn't shrink the window for the video image
public Dimension getPreferredSize ( )
// get the JLabel to "allow" a minimum of 10 pixels width
// not to work out the minimum size from the text length
return ( new Dimension ( 10, super.getPreferredSize().height ) );
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
* Initialise
* @returns true if web cam is detected
public boolean initialise ( )
throws Exception
MyCaptureDeviceInfo[] cams = autoDetect();
if ( cams.length > 0 )
if ( cams.length == 1 )
System.out.println ("Note : 1 web cam detected");
return ( initialise ( cams[0].capDevInfo ) );
else
System.out.println ("Note : " + cams.length + " web cams detected");
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
cams, // videoFormats,
cams[0] );
if ( selected != null )
return ( initialise ( ((MyCaptureDeviceInfo)selected).capDevInfo ) );
else
return ( initialise ( null ) );
else
return ( initialise ( null ) );
* Initialise
* @params _deviceInfo, specific web cam device if not autodetected
* @returns true if web cam is detected
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
statusBar.setText ( "Initialising...");
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
ml = webCamDeviceInfo.getLocator();
if ( ml != null )
player = Manager.createRealizedPlayer ( ml );
if ( player != null )
player.start();
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i < videoFormats.length; i++ )
myFormatList[i] = new MyVideoFormat ( (VideoFormat)videoFormats[i] );
Format currFormat = formatControl.getFormat();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
if ( currFormat instanceof VideoFormat )
currentFormat = (VideoFormat)currFormat;
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.err.println ("Error : Cannot get current video format");
invalidate();
pack();
return ( true );
else
System.err.println ("Error : Could not get visual component");
return ( false );
else
System.err.println ("Error : Cannot create player");
statusBar.setText ( "Cannot create player" );
return ( false );
else
System.err.println ("Error : No MediaLocator for " + webCamDeviceInfo.getName() );
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( false );
catch ( IOException ioEx )
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
catch ( NoPlayerException npex )
statusBar.setText ("Cannot create player");
return ( false );
catch ( CannotRealizeException nre )
statusBar.setText ( "Cannot realize player");
return ( false );
else
return ( false );
* Dynamically create menu items
* @returns the device info object if found, null otherwise
public void setFormat ( VideoFormat selectedFormat )
if ( formatControl != null )
player.stop();
currentFormat = selectedFormat;
if ( visualComponent != null )
visualContainer.remove ( visualComponent );
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
statusBar.setText ( "Format : " + currentFormat );
System.out.println ("Format : " + currentFormat );
formatControl.setFormat ( currentFormat );
player.start();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
invalidate(); // let the layout manager work out the sizes
pack();
else
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
public VideoFormat getFormat ( )
return ( currentFormat );
protected void setUpToolBar ( )
toolbar = new JToolBar();
// Note : due to cosmetic glitches when undocking and docking the toolbar,
// I've set this to false.
toolbar.setFloatable(false);
// Note : If you supply the 16 x 16 bitmaps then you can replace
// the commented line in the MyToolBarAction constructor
formatButton = new MyToolBarAction ( "Resolution", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
protected void toolbarHandler ( MyToolBarAction actionBtn )
if ( actionBtn == formatButton )
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
setFormat ( ((MyVideoFormat)selected).format );
else if ( actionBtn == captureButton )
Image photo = grabFrameImage ( );
if ( photo != null )
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
else
System.err.println ("Error : Could not grab frame");
* autoDetects the first web camera in the system
* searches for video for windows ( vfw ) capture devices
* @returns the device info object if found, null otherwise
public MyCaptureDeviceInfo[] autoDetect ( )
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
String name;
Vector capDevices = new Vector();
if ( list != null )
for ( int i=0; i < list.size(); i++ )
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
System.out.println ("DeviceManager List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
else
for ( int i = 0; i < 10; i++ )
try
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
System.out.println ("VFW Autodetect List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
catch ( Exception ioEx )
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
MyCaptureDeviceInfo[] detected = new MyCaptureDeviceInfo[ capDevices.size() ];
for ( int i=0; i < capDevices.size(); i++ )
detected[i] = (MyCaptureDeviceInfo)capDevices.elementAt ( i );
return ( detected );
* deviceInfo
* @note outputs text information
public void deviceInfo ( )
if ( webCamDeviceInfo != null )
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
for ( int i=0; i < formats.length; i++ )
Format aFormat = formats;
if ( aFormat instanceof VideoFormat )
Dimension dim = ((VideoFormat)aFormat).getSize();
// System.out.println ("Video Format " + i + " : " + formats[i].getEncoding() + ", " + dim.width + " x " + dim.height );
else
System.out.println ("Error : No web cam detected");
* grabs a frame's buffer from the web cam / device
* @returns A frames buffer
public Buffer grabFrameBuffer ( )
if ( player != null )
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
if ( fgc != null )
return ( fgc.grabFrame() );
else
System.err.println ("Error : FrameGrabbingControl is null");
return ( null );
else
System.err.println ("Error : Player is null");
return ( null );
* grabs a frame's buffer, as an image, from the web cam / device
* @returns A frames buffer as an image
public Image grabFrameImage ( )
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
if ( btoi != null )
Image image = btoi.createImage ( buffer );
if ( image != null )
return ( image );
else
System.err.println ("Error : BufferToImage cannot convert buffer");
return ( null );
else
System.err.println ("Error : cannot create BufferToImage instance");
return ( null );
else
System.out.println ("Error : Buffer grabbed is null");
return ( null );
* Closes and cleans up the player
public void playerClose ( )
if ( player != null )
player.close();
player.deallocate();
player = null;
public void windowClosing ( WindowEvent e )
playerClose();
System.exit ( 1 );
public void componentResized ( ComponentEvent e )
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
dim.width = MIN_WIDTH;
mustResize = true;
if ( dim.height < MIN_HEIGHT )
dim.height = MIN_HEIGHT;
mustResize = true;
if ( mustResize )
setSize ( dim );
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
playerClose();
super.finalize();
class MyToolBarAction extends AbstractAction
public MyToolBarAction ( String name, String imagefile )
// Note : Use version this if you supply your own toolbar icons
// super ( name, new ImageIcon ( imagefile ) );
super ( name );
public void actionPerformed ( ActionEvent event )
toolbarHandler ( this );
class MyVideoFormat
public VideoFormat format;
public MyVideoFormat ( VideoFormat format )
this.format = format;
public String toString ( )
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
class MyCaptureDeviceInfo
public CaptureDeviceInfo capDevInfo;
public MyCaptureDeviceInfo ( CaptureDeviceInfo devInfo )
capDevInfo = devInfo;
public String toString ( )
return ( capDevInfo.getName() );
class MySnapshot extends JFrame implements ImageObserver
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DISPOSE_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
public void windowClosing ( WindowEvent e )
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
if ( saveJPEG ( filename ) )
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
else
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
else
setVisible ( false );
dispose();
setVisible ( true );
public void paint ( Graphics g )
super.paint ( g );
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), Color.black, this );
* Saves an image as a JPEG
* @params the image to save
* @params the filename to save the image as
public boolean saveJPEG ( String filename )
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false ); // 100% high quality setting, no compression
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
catch ( Exception ex )
System.out.println ("Error saving JPEG : " + ex.getMessage() );
return ( saved );
} // of MySnapshot
public static void main (String[] args )
try
JWebCam myWebCam = new JWebCam ( "Web Cam Capture" );
myWebCam.setVisible ( true );
if ( !myWebCam.initialise() )
System.out.println ("Web Cam not detected / initialised");
catch ( Exception ex )
ex.printStackTrace(); -
Example JSP and XML code inside that allows update of attributes
<?xml version="1.0" encoding="UTF-8"?>
<MATT_DOCUMENT>
<NAME>Test MATT Document</NAME>
<DESCRIPTION>An example MATT Document</DESCRIPTION>
<TITLE>Matt Australia</TITLE>
<INCLUDEME>TRUE</INCLUDEME>
<KEYWORDS>Australia Brisbane Sydney</KEYWORDS>
<content><![CDATA[<HTML><BODY>Example Document Content</BODY></HTML>]]></content>
</MATT_DOCUMENT>
<?xml version="1.0" standalone="yes"?>
<ClassObject>
<Name>MATT_Document</Name>
<Description>A MATT Document.</Description>
<Superclass RefType="name">Document</Superclass>
<BeanClassPath>qut.MATT.MATT_Document</BeanClassPath>
<Attributes>
<Attribute>
<Name>TITLE</Name>
<DataType>STRING</DataType>
<DataLength>100</DataLength>
<Required>true</Required>
</Attribute>
<Attribute>
<Name>INCLUDEME</Name>
<DataType>BOOLEAN</DataType>
<Required>true</Required>
</Attribute>
<Attribute>
<Name>KEYWORDS</Name>
<DataType>STRING</DataType>
<DataLength>500</DataLength>
<Required>false</Required>
</Attribute>
</Attributes>
</ClassObject>
/* For information on deploying an instance class bean see iFS Developer's Guide 1.1 Section 4-14 */
package qut.MATT;
import oracle.ifs.server.S_LibraryObjectData;
import oracle.ifs.beans.LibrarySession;
import oracle.ifs.beans.Document;
import oracle.ifs.beans.TieDocument;
import oracle.ifs.common.IfsException;
import oracle.ifs.common.AttributeValue;
public class MATT_Document extends TieDocument
private static final boolean DEBUG = true;
public static final String CLASS_NAME = "MATT_DOCUMENT";
public static final String TITLE_ATTRIBUTE = "TITLE";
public static final String INCLUDEME_ATTRIBUTE = "INCLUDEME";
public static final String KEYWORDS_ATTRIBUTE = "KEYWORDS";
public MATT_Document(LibrarySession ifsSession, java.lang.Long id, java.lang.Long classId, S_LibraryObjectData data)
throws IfsException
// Construct a Document object - standard variant.
super(ifsSession,id,classId,data);
public void setTitle(String newValue)
throws IfsException
AttributeValue av = AttributeValue.newAttributeValue(newValue);
setAttribute(TITLE_ATTRIBUTE,av);
public String getTitle()
throws IfsException
AttributeValue av = getAttribute(TITLE_ATTRIBUTE);
return av.getString(getSession());
public void setIncludeMe(boolean newValue)
throws IfsException
AttributeValue av = AttributeValue.newAttributeValue(newValue);
setAttribute(INCLUDEME_ATTRIBUTE,av);
public boolean getIncludeMe()
throws IfsException
AttributeValue av = getAttribute(INCLUDEME_ATTRIBUTE);
return av.getBoolean(getSession());
public void setKeywords(String newValue)
throws IfsException
AttributeValue av = AttributeValue.newAttributeValue(newValue);
setAttribute(KEYWORDS_ATTRIBUTE,av);
public String getKeywords()
throws IfsException
AttributeValue av = getAttribute(KEYWORDS_ATTRIBUTE);
return av.getString(getSession());
<%-- Copyright 2000 Matt Shannon / Oracle Corporation --%>
<%-- This page is used for the modification of MATT Document Properties --%>
<%-- Page Directives --%>
<%@ page language = "java"
errorPage=""
import = "java.util.*, java.text.SimpleDateFormat"
contentType="text/html;charset=UTF-8"
info="MATT Document Properties Screen"%>
<%@ page import = "oracle.ifs.clients.webui.WebUILogin"%>
<%@ page import = "oracle.ifs.clients.webui.WebUIUtils"%>
<%@ page import = "oracle.ifs.clients.webui.resources.WebUIResources"%>
<%@ page import = "oracle.ifs.clients.webui.resources.JspResourcesID"%>
<%@ page import = "oracle.ifs.clients.webui.FileUtils"%>
<%@ page i mport = "oracle.ifs.beans.LibrarySession"%>
<%@ page import = "oracle.ifs.beans.PublicObject"%>
<%@ page import = "oracle.ifs.beans.Attribute"%>
<%@ page import = "oracle.ifs.common.AttributeValue"%>
<%@ page import = "qut.MATT.MATT_Document"%>
<HEAD>
<META http-equiv="pragma" content="no-cache">
<META http-equiv="expires" content="0">
<%-- Declarations --%>
<%! final String headingTitle = "MATT Document Properties";
%>
<%-- Scriptlet --%>
<%
WebUILogin login = WebUILogin.getWebUILogin(request);
if (login.isTimedOut())
String msg = "" + WebUIUtils.getResourceString(WebUIResources.WEBUI_SESSION_TIMEOUT_ERROR_CODE);
msg = msg.replace('\"','\'');
%>
<script language="JavaScript">
alert("<%=msg%>");
top.close();
</script>
<%
else // if logged in
String path = WebUIUtils.getBasePathFromServletPath(request,
WebUIUtils.getUTF8Parameter(request,"path"));
String container = WebUIUtils.getUTF8Parameter(request,"container");
String Title = WebUIUtils.getUTF8Parameter(request,"Title");
String IncludeMe = WebUIUtils.getUTF8Parameter(request,"IncludeMe");
String Keywords = WebUIUtils.getUTF8Parameter(request,"Keywords");
String actn = WebUIUtils.getUTF8Parameter(request,"actn");
LibrarySession sess = login.getSession();
if (actn == null)
actn = "";
if (Title == null)
Title = "";
if (IncludeMe == null)
IncludeMe = "";
if (Keywords == null)
Keywords = "";
if (path.indexOf(":") != -1)
// path is fine no change
else if (container.equals("null"))
path = ":" + path;
else if (container.endsWith("/"))
path = container + path;
else if (path.indexOf(container) == 0)
// leave path alone
else
path = container + "/" + path;
path = FileUtils.convertPath(path, sess);
PublicObject pObject = null;
String displayName = path;
pObject = WebUIUtils.findPublicObjectByPathOrId(login.getResolver(), login.getSession(),path);
if (pObject != null)
pObject = pObject.getResolvedPublicObject();
if (pObject != null)
String name = pObject.getName();
if (name != null && !name.equals(""))
displayName = name;
%>
<title>
<%= "QUT - " + displayName + " - " + headingTitle%>
</title>
<link rel=STYLESHEET type="text/css" href="../webui/css/NewStyles.css">
</head>
<body bgcolor="#FFFFFF" link="#FF0000" vlink="#FF0000" alink="#FF0000" onload="store_initial_values()">
<%
if (pObject == null)
%>
<h3><%=login.getJspResourceString(JspResourcesID.SHOWDOCPROPS_NOT_FOUND_TEXT)%></h3>
<table>
<tr>
<td width="31" height="10" align=left>
<form>
<input type="button" name="Button"
value="<%=login.getJspResourceString(JspResourcesID.WEBUI_OK_BUTTON)%>"
onclick="top.close();">
</form>
</td>
</tr>
</table>
<%
else // pObject != null
try
if (!(pObject instanceof MATT_Document))
%>
<h3>Error - Object not an instance of MATT_Document</h3>
<table>
<tr>
<td width="31" height="10" align=left>
<form>
<input type="button" name="Button"
value="<%=login.getJspResourceString(JspResourcesID.WEBUI_OK_BUTTON)%>"
onclick="top.close();">
</form>
</td>
</tr>
</table>
<%
else
%>
<script language="JavaScript1.2">
var success = true;
var oldTitle = "";
var oldIncludeMe = "";
var oldKeywords = "";
function store_initial_values()
oldTitle = document.forms.docPropertiesForm.Title.value;
oldIncludeMe = document.forms.docPropertiesForm.IncludeMe.selectedIndex;
oldKeywords = document.forms.docPropertiesForm.Keywords.value;
function validate_form()
if (hasChanges())
document.forms.docPropertiesForm.submit();
else
top.close();
function hasChanges()
var hasChanged = false;
var newTitle = " ";
var newIncludeMe = "";
var newKeywords = "";
newTitle = document.forms.docPropertiesForm.Title.value;
newIncludeMe = document.forms.docPropertiesForm.IncludeMe.selectedIndex;
newKeywords = document.forms.docPropertiesForm.Keywords.value;
if (oldTitle != newTitle)
hasChanged = true;
else if (oldIncludeMe != newIncludeMe)
hasChanged = true;
else if (oldKeywords != newKeywords)
hasChanged = true;
return hasChanged;
</script>
<%
if (actn.equals("save_values"))
try
// set Title if changed
if (Title != null && !Title.equals(((MATT_Document)pObject).getTitle()))
((MATT_Document)pObject).setTitle(Title);
// set Keywords if changed
if (Keywords != null && !Keywords.equals(((MATT_Document)pObject).getKeywords()))
((MATT_Document)pObject).setKeywords(Keywords);
// set IncludeMe if changed
if (IncludeMe != null)
boolean l_includeMe = IncludeMe.equals("1");
if ( ((MATT_Document)pObject).getIncludeMe() != l_includeMe )
((MATT_Document)pObject).setIncludeMe(l_includeMe);
catch (Exception e)
String msg = "" + login.getErrorResolver().getMessage(e);
msg = msg.replace('\"','\'');
%>
<script language="JavaScript">
alert("<%=msg%>");
var success = false;
history.back();
</script>
<%
} // end catch block
%>
<script language="JavaScript">
if (success)
document.write("<h2><%=login.getJspResourceString(JspResourcesID.SHOWDOCPROPS_PROPERTIES_SAVED_TEXT)%></h2><form><input type=button value='<%=login.getJspResourceString(JspResourcesID.WEBUI_OK_BUTTON)%>' onclick='top.close();'></form>");
</script>
<%
else // if !actn.equals("save_values")
%>
<center>
<form name="docPropertiesForm" method="POST" action="MATTproperties.jsp">
<table border="1" width="90%">
<tr>
<td width="100%" colspan="3" class="DH">
MATT Document Class Properties <br>
</td>
</tr>
<tr>
<td width="20%" class="required" align="left">
Class Name:
</td>
<td width="80%">
<%=pObject.getClassObject().getName()%>
</td>
</tr>
<tr>
<td width="20%" class="required" align="left">
Bean Path:
</td>
<td width="80%">
<%=pObject.getClassObject().getBeanClasspath()%>
</td>
</tr>
<tr>
<td width="20%" class="required" align="left">
Description:
</td>
<td width="80%">
<%=pObject.getClassObject().getDescription()%>
</td>
</tr>
<tr>
<td width="100%" colspan="3" class="DH">
MATT Document Properties <br>
</td>
</tr>
<tr>
<td width="15%" class="required">
Path:
</td>
<td width="85%" colspan="2">
<%=path%>
</td>
</tr>
<tr>
<td width="20%" class="required" align="left">
Title:
</td>
<td width="80%">
<input type=text name="Title" value="<%=((MATT_Document)pObject).getTitle()%>" size=100>
</td>
</tr>
<tr>
<td width="20%" class="required" align="left">
Keywords:
</td>
<td width="80%">
<input type=text name="Keywords" value="<%=pObject.getAttribute("Keywords").getString(sess)%>" size=100>
</td>
</tr>
<tr>
<td width="20%" class="required" align="left">
IncludeMe:
</td>
<td width="80%">
<select class="listbox" size="1" name="IncludeMe">
<%
if (((MATT_Document)pObject).getIncludeMe())
%>
<option value="1" selected>true</option>
<option value="0" selected>false</option>
<%
else
%>
<option value="1">true</option>
<option value="0" selected>false</option>
<%
%>
</SELECT>
</td>
</tr>
</table>
<table width="80%">
<tr>
<td width="58" height="10" align =left>
<input type="button" name="Button" value="<%=login.getJspResourceString(JspResourcesID.WEBUI_OK_BUTTON)%>" onclick="validate_form();">
</td>
<td width="62" height="10" align=right>
<input type="hidden" name="actn" value="save_values">
<input type="hidden" name="path" value="<%=WebUIUtils.getServletPathFromBasePath(request,path)%>">
<input type="hidden" name="container" value="<%=container%>">
<input type="button" name="Button" value="<%=login.getJspResourceString(JspResourcesID.WEBUI_CANCEL_BUTTON)%>" onclick="top.close();">
</td>
</tr>
</table>
</form>
<%
} // end - if actn.equals
%>
<%
} // end - if pObject instance of
%>
<%
catch (Exception e)
String msg = "" + login.getErrorResolver().getMessage(e);
msg = msg.replace('\"','\'');
%>
<script language="JavaScript">
alert("<%=msg%>");
var success = false;
history.back();
</script>
<%
} // end catch block
finally
out.flush();
} // if pObject
%>
<%
} // if logged in
%>
</BODY>
</HTML>
There is probably lots of better ways of doing the above. The iFS 1.1 Developer guide confused me alot particularly sections 4-10 and 4-11 where it talks about an instance class bean that extends the Tie classes, then the example shown on 4-12 is completely different!
note.. also i got most of the above code using JAD having decompiled webui.jar. Seems these JARS are not obfuscated.
webui.jar in $ORACLE_HOME/ifs1.1/lib
matt.Thanks. I have ifs 1.1 now and have modified this example to use my custom type. However, when the jsp runs and hits the code at the beginning that checks "if login.isTimedOut()", it always thinks I have timed out, even though I have just logged in via the webui.
Any ideas would be appreciated. -
Any examples or open-source code for a Swing photo gallery app?
I need a thumbnail viewer that can quickly load and manage 100s of images. It should load images from a List of URLs using threads, let the user navigate through 100s of images efficiently, select a photo by double-clicking, manage memory efficiently -- all basic stuff that must have been done countless times.
This would be the front-end to a photo/image enhancement app that I have scratched together from countless Java2D examples, howtos, etc. found on this forum and elsewhere on the web. I can fix a photo fine -- I just need to let my users efficiently choose a photo to fix.
Please don't make me scratch out the rest -- or at least help me find some good examples to work from.
TIASearch dev.java.net ( https://www.dev.java.net/servlets/ProjectList )
-
No Question, just example web cam capture code
Hi,
Since loads of people ask for an example of capturing pics from a web cam, here's one that captures pics, lets you take snapshots, which it displays in another frame. When you shut down the frame it asks if you want to save it to a JPEG.
I'm mainly posting this to spite Eka_Kupkova, who only visits this forum to shamelessly advertise a commercial Twain based package in every single posting on this forum which mentions web cams.
Notes : ( Could be more, read the install docs for JMF )
1. you must download the "performance" version of jmf to capture video.
2. I "think" you need to setup the JMF_HOME environment variable
3. Run the jmfinit program to detect your camera and register it.
I had to run it a couple of times before it worked.
4. I had 2 icons for my toolbar, BtnFormat.jpg and BtnCapture.jpg.
They were just 16 x 16 pixel bitmaps, you can make them up yourself.
5. I assume you've got the webcam working and the driver installed already.
Ps. if you find this useful, then reply back with where you are in the world. I'm in Dublin, Ireland.
cheers,
Owen
import javax.swing.*;
import javax.swing.border.*;
import java.io.*;
import javax.media.*;
import javax.media.format.*;
import javax.media.util.*;
import javax.media.control.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
// Ps. I think JMF 2.1.1c used a different package for this class..
import com.sun.media.vfw.VFWCapture;
public class JWebCam extends JFrame
implements WindowListener,
ComponentListener
protected final static int MIN_WIDTH = 320;
protected final static int MIN_HEIGHT = 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
* Constructor
public JWebCam ( String frameTitle )
super ( frameTitle );
try
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
catch ( Exception cnfe )
System.out.println ("Note : Cannot load look and feel settings");
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
statusBar = new JLabel ("Initialising...");
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
setSize ( 320, 260 ); // default size...
setVisible ( true );
* Initialise
* @returns true if web cam is detected
public boolean initialise ( )
throws Exception
return ( initialise ( autoDetect() ) );
* Initialise
* @params _deviceInfo, specific web cam device if not autodetected
* @returns true if web cam is detected
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
// setUpMenu ( );
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
ml = webCamDeviceInfo.getLocator();
if ( ml != null )
player = Manager.createRealizedPlayer ( ml );
if ( player != null )
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
setFormat ( (VideoFormat)videoFormats[0] );
// player.start();
visualComponent = player.getVisualComponent();
getContentPane().add ( visualComponent, BorderLayout.CENTER );
invalidate();
pack();
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i<videoFormats.length; i++ )
myFormatList[i] = new MyVideoFormat ( (VideoFormat)videoFormats[i] );
else
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( true );
catch ( IOException ioEx )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
catch ( NoPlayerException npex )
statusBar.setText ("Cannot create player");
return ( false );
catch ( CannotRealizeException nre )
statusBar.setText ( "Cannot realize player");
return ( false );
else
return ( false );
* Dynamically create menu items
* @returns the device info object if found, null otherwise
public void setFormat ( VideoFormat selectedFormat )
if ( formatControl != null )
player.stop();
statusBar.setText ( "Format : " + selectedFormat );
imageSize = selectedFormat.getSize();
formatControl.setFormat ( selectedFormat );
currentFormat = selectedFormat;
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
player.start();
else
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
protected void setUpToolBar ( )
toolbar = new JToolBar();
formatButton = new MyToolBarAction ( "Format", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
if ( formatButton != null )
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
protected void toolbarHandler ( MyToolBarAction actionBtn )
if ( actionBtn == formatButton )
// JOptionPane.showConfirmDialog ( this, "Format Dialog" );
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
setFormat ( ((MyVideoFormat)selected).format );
else if ( actionBtn == captureButton )
Image photo = grabFrameImage ( );
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
* autoDetects the first web camera in the system
* @returns the device info object if found, null otherwise
public CaptureDeviceInfo autoDetect ( )
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
if ( list != null )
String name;
for ( int i=0; i<list.size(); i++ )
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
break;
if ( devInfo != null && devInfo.getName().startsWith("vfw:") )
return ( devInfo );
else
for ( int i = 0; i < 10; i++ )
try
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
return ( devInfo );
catch ( Exception ioEx )
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
return ( null );
else
return ( null );
* deviceInfo
* @note outputs text information
public void deviceInfo ( )
if ( webCamDeviceInfo != null )
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
for ( int i=0; i<formats.length; i++ )
Format aFormat = formats;
if ( aFormat instanceof VideoFormat )
Dimension dim = ((VideoFormat)aFormat).getSize();
System.out.println ("Video Format " + i + " : " + formats[i].getEncoding() + ", " + dim.width + " x " + dim.height );
else
System.out.println ("Format " + i + " : " + formats[i].getEncoding() );
else
System.out.println ("Error : No web cam detected");
* grabs a frame's buffer from the web cam / device
* @returns A frames buffer
public Buffer grabFrameBuffer ( )
if ( player != null )
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
Buffer buf = fgc.grabFrame();
return ( buf );
else
return ( null );
* grabs a frame's buffer, as an image, from the web cam / device
* @returns A frames buffer as an image
public Image grabFrameImage ( )
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
Image image = btoi.createImage ( buffer );
return ( image );
else
System.out.println ("Error : Buffer grabbed is null");
return ( null );
* Closes and cleans up the player
public void playerClose ( )
if ( player != null )
player.close();
player.deallocate();
player = null;
public void windowClosing ( WindowEvent e )
playerClose();
System.exit ( 1 );
public void componentResized(ComponentEvent e)
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
dim.width = MIN_WIDTH;
mustResize = true;
if ( dim.height < MIN_HEIGHT )
dim.height = MIN_HEIGHT;
mustResize = true;
if ( mustResize )
setSize ( dim );
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
playerClose();
super.finalize();
class MyToolBarAction extends AbstractAction
public MyToolBarAction ( String name, String imagefile )
super ( name, new ImageIcon ( imagefile ) );
public void actionPerformed ( ActionEvent event )
toolbarHandler ( this );
class MyVideoFormat
public VideoFormat format;
public MyVideoFormat ( VideoFormat _format )
format = _format;
public String toString ( )
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
class MySnapshot extends JFrame
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DO_NOTHING_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
public void windowClosing ( WindowEvent e )
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
if ( saveJPEG ( filename ) )
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
else
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
else
setVisible ( false );
dispose();
setVisible ( true );
public void paint ( Graphics g )
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), this );
* Saves an image as a JPEG
* @params the image to save
* @params the filename to save the image as
public boolean saveJPEG ( String filename )
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false );
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
catch ( Exception ex )
System.out.println ("Error saving JPEG : " + ex.getMessage() );
return ( saved );
} // of MySnapshot
public static void main (String[] args )
try
JWebCam myWebCam = new JWebCam ( "TimeSlice Web Cam Capture" );
if ( myWebCam.initialise() )
// myWebCam.deviceInfo(); // outputs device info
else
System.out.println ("Web Cam not detected / initialised");
catch ( Exception ex )
ex.printStackTrace();Doohhh... I posted an old version which didn't work.
I tried and tested this last night, and it runs grand using Ver 2.1.1e.
Tested under Windows 98, using an old Creative GO Camera.
Haven't tried it under Linux, but suspect you'd have to at least change an references to "vfw" to "v4l".
You'll need jmf.jar in your classpath to run it too.
cheers,
Owen
import javax.swing.*;
import javax.swing.border.*;
import java.io.*;
import javax.media.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.util.*;
import javax.media.control.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
// import com.sun.media.vfw.VFWCapture; // JMF 2.1.1c version
import com.sun.media.protocol.vfw.VFWCapture; // JMF 2.1.1e version
public class JWebCam extends JFrame
implements WindowListener, ComponentListener
protected final static int MIN_WIDTH = 320;
protected final static int MIN_HEIGHT = 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected JPanel visualContainer = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
protected boolean initialised = false;
* Constructor
public JWebCam ( String frameTitle )
super ( frameTitle );
try
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
catch ( Exception cnfe )
System.out.println ("Note : Cannot load look and feel settings");
setSize ( 320, 260 ); // default size...
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
visualContainer = new JPanel();
visualContainer.setLayout ( new BorderLayout() );
getContentPane().add ( visualContainer, BorderLayout.CENTER );
statusBar = new JLabel ("");
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
* Initialise
* @returns true if web cam is detected
public boolean initialise ( )
throws Exception
return ( initialise ( autoDetect() ) );
* Initialise
* @params _deviceInfo, specific web cam device if not autodetected
* @returns true if web cam is detected
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
statusBar.setText ( "Initialising...");
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
ml = webCamDeviceInfo.getLocator();
if ( ml != null )
player = Manager.createRealizedPlayer ( ml );
if ( player != null )
player.start();
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i<videoFormats.length; i++ )
myFormatList[i] = new MyVideoFormat ( (VideoFormat)videoFormats[i] );
Format currFormat = formatControl.getFormat();
if ( currFormat instanceof VideoFormat )
currentFormat = (VideoFormat)currFormat;
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.err.println ("Error : Cannot get current video format");
invalidate();
pack();
return ( true );
else
System.err.println ("Error : Could not get visual component");
return ( false );
else
System.err.println ("Error : Cannot create player");
statusBar.setText ( "Cannot create player" );
return ( false );
else
System.err.println ("Error : No MediaLocator for " + webCamDeviceInfo.getName() );
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( false );
catch ( IOException ioEx )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
catch ( NoPlayerException npex )
statusBar.setText ("Cannot create player");
return ( false );
catch ( CannotRealizeException nre )
statusBar.setText ( "Cannot realize player");
return ( false );
else
return ( false );
* Dynamically create menu items
* @returns the device info object if found, null otherwise
public void setFormat ( VideoFormat selectedFormat )
if ( formatControl != null )
player.stop();
imageSize = selectedFormat.getSize();
formatControl.setFormat ( selectedFormat );
player.start();
statusBar.setText ( "Format : " + selectedFormat );
currentFormat = selectedFormat;
visualContainer.setPreferredSize ( currentFormat.getSize() );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
public VideoFormat getFormat ( )
return ( currentFormat );
protected void setUpToolBar ( )
toolbar = new JToolBar();
// Note : If you supply the 16 x 16 bitmaps then you can replace
// the commented line in the MyToolBarAction constructor
formatButton = new MyToolBarAction ( "Resolution", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
protected void toolbarHandler ( MyToolBarAction actionBtn )
if ( actionBtn == formatButton )
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
setFormat ( ((MyVideoFormat)selected).format );
else if ( actionBtn == captureButton )
Image photo = grabFrameImage ( );
if ( photo != null )
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
else
System.err.println ("Error : Could not grab frame");
* autoDetects the first web camera in the system
* searches for video for windows ( vfw ) capture devices
* @returns the device info object if found, null otherwise
public CaptureDeviceInfo autoDetect ( )
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
if ( list != null )
String name;
for ( int i=0; i<list.size(); i++ )
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
break;
if ( devInfo != null && devInfo.getName().startsWith("vfw:") )
return ( devInfo );
else
for ( int i = 0; i < 10; i++ )
try
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
return ( devInfo );
catch ( Exception ioEx )
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
return ( null );
else
return ( null );
* deviceInfo
* @note outputs text information
public void deviceInfo ( )
if ( webCamDeviceInfo != null )
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
for ( int i=0; i<formats.length; i++ )
Format aFormat = formats;
if ( aFormat instanceof VideoFormat )
Dimension dim = ((VideoFormat)aFormat).getSize();
// System.out.println ("Video Format " + i + " : " + formats[i].getEncoding() + ", " + dim.width + " x " + dim.height );
else
System.out.println ("Error : No web cam detected");
* grabs a frame's buffer from the web cam / device
* @returns A frames buffer
public Buffer grabFrameBuffer ( )
if ( player != null )
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
if ( fgc != null )
return ( fgc.grabFrame(); );
else
System.err.println ("Error : FrameGrabbingControl is null");
return ( null );
else
System.err.println ("Error : Player is null");
return ( null );
* grabs a frame's buffer, as an image, from the web cam / device
* @returns A frames buffer as an image
public Image grabFrameImage ( )
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
if ( btoi != null )
Image image = btoi.createImage ( buffer );
if ( image != null )
return ( image );
else
System.err.println ("Error : BufferToImage cannot convert buffer");
return ( null );
else
System.err.println ("Error : cannot create BufferToImage instance");
return ( null );
else
System.out.println ("Error : Buffer grabbed is null");
return ( null );
* Closes and cleans up the player
public void playerClose ( )
if ( player != null )
player.close();
player.deallocate();
player = null;
public void windowClosing ( WindowEvent e )
playerClose();
System.exit ( 1 );
public void componentResized ( ComponentEvent e )
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
dim.width = MIN_WIDTH;
mustResize = true;
if ( dim.height < MIN_HEIGHT )
dim.height = MIN_HEIGHT;
mustResize = true;
if ( mustResize )
setSize ( dim );
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
playerClose();
super.finalize();
class MyToolBarAction extends AbstractAction
public MyToolBarAction ( String name, String imagefile )
// Note : Use version this if you supply your own toolbar icons
// super ( name, new ImageIcon ( imagefile ) );
super ( name );
public void actionPerformed ( ActionEvent event )
toolbarHandler ( this );
class MyVideoFormat
public VideoFormat format;
public MyVideoFormat ( VideoFormat _format )
format = _format;
public String toString ( )
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
class MySnapshot extends JFrame
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DISPOSE_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
public void windowClosing ( WindowEvent e )
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
if ( saveJPEG ( filename ) )
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
else
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
else
setVisible ( false );
dispose();
setVisible ( true );
public void paint ( Graphics g )
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), this );
* Saves an image as a JPEG
* @params the image to save
* @params the filename to save the image as
public boolean saveJPEG ( String filename )
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false ); // 100% high quality setting, no compression
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
catch ( Exception ex )
System.out.println ("Error saving JPEG : " + ex.getMessage() );
return ( saved );
} // of MySnapshot
public static void main (String[] args )
try
JWebCam myWebCam = new JWebCam ( "TimeSlice Web Cam Capture" );
myWebCam.setVisible ( true );
if ( !myWebCam.initialise() )
System.out.println ("Web Cam not detected / initialised");
catch ( Exception ex )
ex.printStackTrace(); -
Set content of RichTextBlock Dynamically by Binding or simply by code
I am trying to set the content of RichTextBlock dynamically. I have tried Data Binding and also by adding Paragraph element as child but found no solution. Can somebody provide some solution or snippet for it?
Hi Rohitrkkumar,
It seems that RichTextBlock doesn’t provide binding functionality. You can try the following approach to work around.
Step 1, build a ContnetControl to instead of RichTextBlock like the following code snippet.
<ContentControl Content="{Binding Path=Snippet, Converter={StaticResource RtFToBlocks}}">
</ContentControl>
Step 2, prepare RTF string like
<RichTextBlock xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'><Paragraph><Bold>Fearful</Bold> of all things, Fred...</Paragraph></RichTextBlock>
Step 3, use value converter to bind to ContentControl.
public object Convert(object value, Type targetType, object parameter, string language)
string rtfText = (string)value;
object blocksObj = XamlReader.Load(rtfText);
return (RichTextBlock)blocksObj;
Please let me know if you have any concerns.
Regards,
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place. Click HERE to participate
the survey. -
Hi, Can I simply this code.. according to performance
Hi,
Could you any one help me in simplyfying or arranging in right way...
LOOP AT GT_CRED WHERE USERNAME IN SO_ERNAM AND
UDATE IN SO_ERDAT.
IF ( GT_CRED-TABNAME = 'EKKO' ) OR ( GT_CRED-TABNAME = 'EKPO' )
OR ( GT_CRED-TABNAME = 'EINKBELEG').
IF ( GT_CRED-FNAME = 'WAERS' ) OR ( GT_CRED-FNAME = 'EKGRP' )
OR ( GT_CRED-FNAME = 'PROCSTAT' ) OR ( GT_CRED-FNAME = 'NETWR' )
OR ( GT_CRED-TABNAME = 'EINKBELEG' ).
To pick the PO number
GT_OUT-EBELN = GT_CRED-OBJECTID+0(10).
To pick the PO Line items
IF GT_CRED-TABNAME = 'EINKBELEG'.
GT_OUT-EBELP = GT_CRED-TABKEY+10(5).
ELSE.
GT_OUT-EBELP = GT_CRED-TABKEY+13(5).
ENDIF.
To pick the change date, User name, Table name & Field Name
GT_OUT-ERDAT = GT_CRED-UDATE.
GT_OUT-ERNAM = GT_CRED-USERNAME.
GT_OUT-TABNAME = GT_CRED-TABNAME.
GT_OUT-FNAME = GT_CRED-FNAME.
To Pick Old & New value If the Currency is changed
IF GT_CRED-FNAME = 'WAERS'.
GT_OUT-OLDWAERS = GT_CRED-F_OLD+0(3).
GT_OUT-NEWWAERS = GT_CRED-F_NEW+0(3).
To pick New value if the Purchasing Group is changed
ELSEIF GT_CRED-FNAME = 'EKGRP'.
GT_OUT-OLDGRP = GT_CRED-F_OLD+0(3).
GT_OUT-NEWGRP = GT_CRED-F_NEW+0(3).
ENDIF.
To Pick Old & New value If the Version is changed
IF GT_CRED-FNAME = 'PROCSTAT'.
GT_OUT-OLDVN = GT_CRED-F_OLD+0(5).
GT_OUT-NEWVN = GT_CRED-F_NEW+0(5).
ENDIF.
To Pick Old & New value If the Order value is changed
IF GT_CRED-FNAME = 'NETWR'.
GT_OUT-OLDAMT = GT_CRED-F_OLD+0(16).
GT_OUT-NEWAMT = GT_CRED-F_NEW+0(16).
ENDIF.
APPEND GT_OUT.
CLEAR GT_OUT.
ENDIF.
ENDIF.
ENDLOOP.
Regards
ReddyHi,
Please try this.
LOOP AT GT_CRED WHERE USERNAME IN SO_ERNAM AND
UDATE IN SO_ERDAT.
case GT_CRED-FNAME.
when 'EINKBELEG'.
GT_OUT-EBELP = GT_CRED-TABKEY+10(5).
when 'WAERS'.
GT_OUT-OLDWAERS = GT_CRED-F_OLD+0(3).
GT_OUT-NEWWAERS = GT_CRED-F_NEW+0(3).
GT_OUT-EBELP = GT_CRED-TABKEY+13(5).
when 'EKGRP'.
GT_OUT-OLDGRP = GT_CRED-F_OLD+0(3).
GT_OUT-NEWGRP = GT_CRED-F_NEW+0(3).
GT_OUT-EBELP = GT_CRED-TABKEY+13(5).
when 'PROCSTAT'.
GT_OUT-OLDVN = GT_CRED-F_OLD+0(5).
GT_OUT-NEWVN = GT_CRED-F_NEW+0(5).
GT_OUT-EBELP = GT_CRED-TABKEY+13(5).
when 'NETWR'.
GT_OUT-OLDAMT = GT_CRED-F_OLD+0(16).
GT_OUT-NEWAMT = GT_CRED-F_NEW+0(16).
GT_OUT-EBELP = GT_CRED-TABKEY+13(5).
when others.
endcase.
GT_OUT-EBELN = GT_CRED-OBJECTID+0(10).
GT_OUT-ERDAT = GT_CRED-UDATE.
GT_OUT-ERNAM = GT_CRED-USERNAME.
GT_OUT-TABNAME = GT_CRED-TABNAME.
GT_OUT-FNAME = GT_CRED-FNAME.
APPEND GT_OUT.
CLEAR GT_OUT.
endloop.
Regards,
Ferry Lianto -
Loading examples, error code 21
Every time I try to load the examples, about 20 pop-up boxes come up, all with different file names, with error code 21 : external subroutine required for execution could not be found. I wrote down a list of all the file names that come up, and a few come up twice.
WsEpQueryGetHitCount.vi
WsEpQueryGetTitle.vi
WsEpQueryGetId.vi
WsEpQueryGetSummary.vi
WsEpQueryGetMetadata.vi
WsEpQueryCheck.vi
WsEpClose.vi
WsEpQueryAddTerm.vi
WsEpQueryOpenGroup.vi
WsEpQueryCloseGroup.vi
WsEpOpen.vi
WsEpQuerySubmit.vi
WsEpQueryRequestMetadata.vi
WsEpInstallCheck.vi
WsEpInstall.vi
WsPing.vi
WsLookupOpen.vi
WsCheck.vi
WsEpInstallcancel.vi
WsEpQueryCancel.vi
WsLoopupGetSize.vi
WsLookupGetCode.vi
WsLookupGetText.vi
WsLookupClose.vi
WsLookupCancel.vi
Labview was recently loaded on this labtop, and other than attempting to view the examples hasn't been used. Can someone please offer some suggestions.OK, that helps to narrow it down. It looks like that specific example is related to data acquisition. I know you said that no examples load, but let's concentrate on this for now. First, have you installed DAQmx? I'm not familiar with that example, so I'm assuming that's a DAQmx example - it may be a "traditional DAQ" example. If you haven't installed DAQmx you should install that. Otherwise the example won't find the DAQ VIs. (The list you provided are not DAQ VIs, but without the DAQ VIs you won't be able to run any code.) You can check to see whether you should have "traditional" DAQ or DAQmx using the Measurement and Automation Explorer. Yes, this tool is independent of LabVIEW, but it will tell you what software you have installed. Simply go to one of the sytems where it works, run MAX, and then expand "My System -> Software". You will see a list of software that's installed and you can compare it to what you have installed on your system.
Now, as far as not being able to open any example: Are you trying to open them from the Example Finder, or from disk via the File->Open menu item? You should be able to at least open the files from disk directly. All examples are in the \National Instruments\LabVIEW 7.1\examples directory. DAQ examples, for instance, should be in the "DAQmx" folder and will probably be in libraries. Can you open the examples direct from disk? Try one of the examples in the "general" folder, as these examples are just LabVIEW code without additional libraries.
If you're trying to open the examples via the Example Finder you most likely do
not have some services running. Somewhere along the way NI decided to
use this convoluted method of using services just to open examples. If some of these services are not running, the Example Finder doesn't work. The list of services that get installed is long, depending on what you've got installed:
National Instruments Domain Service
National Instruments PSP Server Locator
National Instruments Time Synchronization
National Instruments Variable Engine
NI Configuration Manager
NI Service Locator
nidevldu
NILM License manager
nipxirmu
I believe the only service that the Example Finder is dependent on is the NI Server Location, but you should check the status of all these services (if you have them) and see if they're running. Their startup type should be "Automatic". -
Need a simple example program code to use SF_EXAMPLE_01
Hi all,
I have just try to learn smartforms. As i have SAP NW4 for learning.
I found SF_EXAMPLE_01 in the system.
Can any body help me out how to use this example in abap program code?
Thanks.
robSmart Forms, try this steps.. it will teach you how to create smart form and how to use it.
1) Tcode --> SmartForms
2) Form name --> Z_SF_TEST Create
3) Under Global settings
a) Form Interface
Table Tab
ITAB LIKE EKPO
b) GLOBAL Definitions
WA_NETPR LIKE EKPO-NETPR
In smart forms if we want to display quantity and currency fields. We can't directly display currency field and quantity fields
For that we have to create an extra variable in global definitions
Ex: netpr FIELD of EKPO
CREATE program lines and specify WA_NETWR = itab-netpr.
4) RT CLick on main Window
CREATE --> TABLE
Click Table painter
DEFAULT %LTYPE will be Created
a) If you want more like Header footer etc add by rt click on %LTYPE1
Table (Tab)
%LTYPE Radio(SELECT) 5 CM 5 CM 6 CM
CLICK on DATA (Tab)
INTERNAL TABLE ITAB LIKE ITAB
5)RT click on table control and create --> program lines
General attribute (Tab)
INPUT PARAMETER OUTPUT PARAMETER
itab WA_NETPR
Code Area
WA_NETWR = ITAB-NETPR.
6) RT CLcick on table ctl and create 3 text to display the fields
a) % text1 +button(insert field)
FIELD name &itab-ebeln&
Output options (tab)
Check New line LINETYPE %Ltype1
check new cell
b) % text2
& itab-ebelp&
output options
check new cell
c) % text2
& wa_netpr&
output options
check new cell
Report ac
Tables ekpo.
Data: itab1 like ekpo occurs 0 with header line.
select * into table itab1 from ekpo.
Call function module "to know function module name goto smartform and execute the smart form name it will give you the function module name.
If your question is answered, close the thread and reward all useful answers...
Regards,
Sairam -
Observer Design Pattern: Looking for redesign ABAP OO code example
Hello folks,
I am looking for an example for ABAP OO code that has been redesigned by applying the Observer Design Pattern. I would be very interested in both the code before as well as the code after the pattern is being applied.
Thanks in advance and kind regards, AlexObserver can be implemented using the EVENTS.
I had recently implemented the observer at one of my client's place. I had screen with so many ALVs. One ALV was kind of editable and other were just showing the information of the current row as well as some total information. So, initially I started with the Main ALV and SUB(1 and 2) for other ALVs. Now, when I need to refresh my ALVs based on the main ALV data, I had to explicitly update the data of the each Sub ALV. The code was kind of static and requirement was not yet fixed.
Later on we need to add one more ALV on the same screen. It was easy to change the existing method where I was doing the explicit refresh of each ALV. But I thought of using the Events.
I created an event REFRESH_DETAILS for main ALV. so, when data gets changed (which I was catching by DATA_CHANGED event of ALV), I raise the event.
RAISE EVENT REFRESH_DETAILS
exporting new_data = it_Data.
In Sub ALVs, I created the event handler method to handle the event REFRESH_DETAILS of the main ALV.
methods: handle_refresh_details
for event REFRESH_DETAILS of ZCL_MAIN_ALV.
I also had to register the Handler.
SET HANDLER me->handle_refresh_details FOR ALL INSTANCES.
I'll soon write a post on my [ABAP Help blog|http://help-abap.zevolving.com/] with all the details.
Regards,
Naimesh Patel -
The PDA module provides an example of calling external code via an inline C
The inline source code from the example:
OSVERSIONINFO info;
info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
Err = GetVersionEx(&info);
MajorVersion = info.dwMajorversion;
MinorVersion = info.dwMinorversion;
The PDA build specification includes *no* additional source files of any kind. The only source file in the build is the top-level VI. Where are the definitions for the OSVERSIONINFO type, and the GetVersionEx function drawn from?
The VI builds and runs fine on the PDA, but I don't understand how.Donovan B wrote:
Hi Dan,
It looks like there is an OSVERSIONINFO struct and GetVersionEx function available in the coredll.lib for the application to call on a PDA running Windows Mobile 5.0. On both operating systems, it looks like the GetVersionEx function is defined in winbase.h, so I am not sure if there is some kind of linking between the two or if the header file is automatically included when building the executable or not. Let me do some more research and I'll let you know.
The information for the function on Windows Mobile can be found here.
Message Edited by Donovan B on 12-19-2007 06:33 PM
While the API functions are mostly the same for Windows Mobile and normal Windows the actual implementation and compilation is obviously not and there is no need for that. Windwos Mobile is typically (not sure if there are other versions at all) ARM based, while the desktop version is x86 based. A huge difference.
And when LabVIEW creates a PDA executable it mostly creates a bunch of hidden C files, invokes the Visual C for Windows CE
tool chain and lets it create the executable. The Visual C for Windows CE tool chain comes with its own import link libraries for accessing WinAPI functions and those import link libraries reference the functions in the DLLs as they are implemented for Windows Mobile (CE). There is no kernel32.dll in Windows Mobile and why should it? You can't move normal Windows code that would expect that DLL to Windows Mobile anyhow, since it has a completely different CPU and there is always a complete recompile with the Windows CE toolchain necessary anyhow.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions -
IDOC with example and T.codes ??
hii
Some body explain me about the scenario and steps to be followed in configuration and in front process with transaction codes .
Jus some experts can explain me about over all procedure of IDOC in SAP with transaction code (Full cycle with examples...??
In MM , exaplin me with some examples and with transaction codes ..
ThanksCheck these links
[IDOC Configuration|http://sapmm.posterous.com/idoc-configuration]
[Learn SAP u2014 IDOC basic|http://blogs.moovar.com/sap/learn-sap-idoc-basic/]
1) What is IDOC?
IDoc means intermediate document is a standard data structure for electronic data interchange (EDI) between application programs written for the popular SAP business system or between an SAP application and an external program. IDocs serve as the vehicle for data transfer in SAP's Application Link Enabling (ALE) system.
2) Why its is used with SAP?
IDocs are used for asynchronous transactions: each IDoc generated exists as a self-contained text file that can then be transmitted to the requesting workstation without connecting to the central database. Another SAP mechanism, the Business Application Programming Interface (BAPI) is used for synchronous transactions.
3) What its advantages & disadvantages?
a) IDOC - Advantages :
The target system need not be always online. The IDOC would be created and would send the IDOC once the target
system is available.
No additional programming required. Configuration is the only one need to be set up.
b) IDOC - Disadvantages :
Receipt/Processing on the target system need not be immediate
When no standard IDOC is available, then it is very hard to create a custom IDOC when compared to creating a
standard BAPI
Unless ALE is used, it is difficult to trace if the IDOC has actually reached the target system
4) IDOC flow with MM :
In order to make use of the workflow for IDoc processing, you do not have to go through the cumbersome
workflow design procedure as it is described in the workflow documentation. For the mentioned purpose, you can
register the workflow handler from the menu, which says Event Coupling from the BALD transaction.
Triggering the IDoc from a workflow event has a disadvantage: if the IDoc has to be repeated for some reason, the
event cannot be repeated easily. This is due to the nature of a workflow event, which is triggered usually from a
precedent action.
Edited by: Afshad Irani on Aug 26, 2010 5:48 PM -
Example of Java code to publish to Flex?
I have Tomcat talking to Flex using BlazeDS, but the conversation is one way. Flex has to initialize it.
I want to be able to publish to Flex from Java (in Tomcat). There are nice examples of the Flex code needed to catch this, and how to subscribe and all, but I cannot find any Java snippets that show how one initiates this conversation on that end.
Can anyone point me at some sample code for this?
Thanks!Well, you are using Flex to talk to BlazeDS that is deployed on Tomcat. What version of BlazeDS are you using?
Can you elaborate more on "Flex has to initalize it"? You have a Flex client, so you need to register interest (subscribe) to messaging destination from Flex.
If you are asking:
How do I push messages from the server (Java) to the Flex then take a look: help.adobe.com/en_US/dataservicesjee/4.6/Developing/WS9d22440892c78ffa-3a437432122a8558cd f-8000Update.html.
If you are asking how do I setup subscription from a Java, then BlazeDS does not support it (unless ofcourse you are using a JMS destination -- see documentation for how to that). The latest release of Data Services v4.6, ships with various remoting and messaging clients in Java, Andriod, iOS, HTML5/JS and lots of other features, that allow you to do this.
Can you clarify what exactly you need? Hope that helps.
Rohit
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