Get image width and height?
In loading an image using the File Browse capability, is there any way to obtain the height and width of the image being loaded? I want to save that along with the MIME type and file name.
Hello,
Take a look at the ORDImage object type, which you can use to obtain the properties of the image -
http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28414/ch_imgref.htm
You can do much more than just accessing the properties too, such as rescaling the image, greyscaling, making a thumbnail etc.
Scott Spendolini did a good blog post on this a while back -
http://spendolini.blogspot.com/2005/10/manipulating-images-with-database.html
John.
(by the way, doesn't this highlight a short-coming of the new forum points system? Scott does a nice long detailed blog post...I just link to it and hopefully get the points ;).
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Hello,
I have a class entitled DisplayCanvas, which will accept some parameters from an invocation in another class including a shape and message parameters. These parameters must be centered in the instance of DisplayCanvas.
For some reason, when I use this.getWidth() and this.getHeight() within my DisplayCanvas class, I get 0 and 0! I need the width and height in order to center the parameters the user will enter.
Why does the width and height result at 0? What can I do to get the width and height?
In my DisplayCanvas class notice the lines:
canWidth = this.getWidth();
canHeight = this.getHeight();
For some reason the result is 0 for each!
Here is my code for the DisplayCanvas class:
//import the necessary clases
import java.awt.*;
import java.applet.*;
import javax.swing.*;
//begin the DisplayCanvas
public class DisplayCanvas extends Canvas
//declare private data members to house the width and height of the canvas
private int canWidth;
private int canHeight;
//declare private data members for the shape and message
private String message;
private String shape;
private Color sColor;
private int sWidth;
private int sHeight;
private String font;
private Color ftColor;
private int ftSize;
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canWidth = this.getWidth();
canHeight = this.getHeight();
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message = "";
shape = "";
sColor = null;
sWidth = 0;
sHeight = 0;
font = "";
ftColor = null;
ftSize = 0;
} //end the constructor
//begin the setParams function
public void setParams(String m, String s, Color c, int w, int h,
String f, Color ftC, int ftS)
//set all private data members of DisplayShape to the arguments
//this function assumes error checking was done by DemoShape
message = m;
shape = s;
sColor = c;
sWidth = w;
sHeight = h;
font = f;
ftColor = ftC;
ftSize = ftS;
} //end the setParams function
//begin the public paint function of ShowShape
public void paint(Graphics g)
//set and output the shape according to the arguments
//determine the x and y of the shape
int x = (canWidth - sWidth) / 2;
int y = (canHeight - sHeight) / 2;
//set the color for the graphic object
g.setColor(sColor);
//output the shape
g.drawRect(x, y, sWidth, sHeight);
//set and output the message according to the arguments
//set the color and the font for the graphic object
g.setColor(ftColor);
g.setFont(new Font(font, Font.PLAIN, ftSize));
//determine the centering of the message
//output the message with the settings
g.drawString(canWidth + " " + canHeight, 10, 10);
} //end the paint function of ShowShape class
} //end the DisplayCanvas classHere is my form entry class using the nested DisplayCanvas instance entitled drawCanvas:
//import the necessary java packages
import java.awt.*; //for the awt widgets
import javax.swing.*; //for the swing widgets
import java.awt.event.*; //for the event handler interfaces
//no import is needed for the DisplayCanvas class
//if in the same directory as the DemoShape class
public class DemoShape extends JApplet
//declare private data members of the DemoShape class
//declare the entry and display panel containers
private Container entire; //houses entryPanel and displayCanvas
private JPanel entryPanel; //accepts the user entries into widgets
private DisplayCanvas drawCanvas; //displays the response of entries
//required control buttons for the entryPanel
private JTextField xShapeText, yShapeText, messageText, fontSizeText;
private ButtonGroup shapeRadio;
private JRadioButton rect, oval, roundRect;
private JComboBox shapeColorDrop, fontTypeDrop, fontColorDrop;
//declare public data members of the DemoShape class
//init method to initialize the applet objects
public void init()
//arrays of string to be used later in combo boxes
//some are used more than once
String fonts[] = {"Dialog", "Dialog Input", "Monospaced",
"Serif", "Sans Serif"};
String shapes[] = {"Rectangle", "Round Rectangle", "Oval"};
String colors[] = {"Black", "Blue", "Cyan", "Dark Gray",
"Gray", "Green", "Light Gray", "Magenta", "Orange",
"Pink", "Red", "White", "Yellow"};
//declare variables to assist with the layout
//these are the left and right justified x coordinates
int ljX = 10; int rjX = 150;
//this is the y coordinates for the rows
int yRow1 = 10; //the shape rows
int yRow2 = 40;
int yRow3 = 60;
int yRow4 = 130;
int yRow5 = 150;
int yRow6 = 210; //the message rows
int yRow7 = 240;
int yRow8 = 260;
int yRow9 = 300;
int yRow10 = 320;
int yRow11 = 360;
int yRow12 = 380;
//these are the widths for the text boxes, drop downs
//message entry, big message entry and radio buttons
int tWidth = 30; int dWidth = 100;
int mWidth = 250; int bmWidth = 250;
int rWidth = 125;
//the height is universal, even for the messages!
int height = 25;
//set a content pane for the entire applet
//set the size of the entire window and show the entire applet
entire = this.getContentPane();
entire.setLayout(new GridLayout(1, 2));
//create the entry panel and add it to the entire pane
entryPanel = new JPanel();
entryPanel.setLayout(null);
entire.add(entryPanel);
//create the display canvas and add it to the entire pane
//this will display the output
drawCanvas = new DisplayCanvas();
entire.add(drawCanvas);
//entry panel code
//add the form elements in the form of rows
//the first row (label)
JLabel entryLabel = new JLabel("Enter Shape Parameters:");
entryPanel.add(entryLabel);
entryLabel.setBounds(ljX, yRow1, bmWidth, height);
//second row (labels)
JLabel shapeTypeLabel = new JLabel("Select Shape:");
shapeTypeLabel.setBounds(ljX, yRow2, mWidth, height);
entryPanel.add(shapeTypeLabel);
JLabel shapeColorLabel = new JLabel("Select Shape Color:");
shapeColorLabel.setBounds(rjX, yRow2, mWidth, height);
entryPanel.add(shapeColorLabel);
//third row (entry)
rect = new JRadioButton("Rectangle", true);
oval = new JRadioButton("Oval", false);
roundRect = new JRadioButton("Round Rectangle", false);
rect.setBounds(ljX, yRow3, rWidth, height);
oval.setBounds(ljX, yRow3 + 20, rWidth, height);
roundRect.setBounds(ljX, yRow3 + 40, rWidth, height);
shapeRadio = new ButtonGroup();
shapeRadio.add(rect);
shapeRadio.add(oval);
shapeRadio.add(roundRect);
entryPanel.add(rect);
entryPanel.add(oval);
entryPanel.add(roundRect);
shapeColorDrop = new JComboBox(colors);
shapeColorDrop.setBounds(rjX, yRow3, dWidth, height);
shapeColorDrop.addFocusListener(new focusListen());
entryPanel.add(shapeColorDrop);
//the fourth row (labels)
JLabel xShapeLabel = new JLabel("Enter Width:");
xShapeLabel.setBounds(ljX, yRow4, mWidth, height);
entryPanel.add(xShapeLabel);
JLabel yShapeLabel = new JLabel("Enter Height:");
yShapeLabel.setBounds(rjX, yRow4, mWidth, height);
entryPanel.add(yShapeLabel);
//the fifth row (entry)
xShapeText = new JTextField("200", 3);
xShapeText.setBounds(ljX, yRow5, tWidth, height);
xShapeText.addFocusListener(new focusListen());
entryPanel.add(xShapeText);
yShapeText = new JTextField("200", 3);
yShapeText.setBounds(rjX, yRow5, tWidth, height);
yShapeText.addFocusListener(new focusListen());
entryPanel.add(yShapeText);
//the sixth row (label)
JLabel messageLabel = new JLabel("Enter Message Parameters:");
messageLabel.setBounds(ljX, yRow6, bmWidth, height);
entryPanel.add(messageLabel);
//the seventh row (labels)
JLabel messageEntryLabel= new JLabel("Enter Message:");
messageEntryLabel.setBounds(ljX, yRow7, mWidth, height);
entryPanel.add(messageEntryLabel);
//the eighth row (entry)
messageText = new JTextField("Enter your message here.");
messageText.setBounds(ljX, yRow8, mWidth, height);
messageText.addFocusListener(new focusListen());
entryPanel.add(messageText);
//the ninth row (label)
JLabel fontTypeLabel = new JLabel("Select Font:");
fontTypeLabel.setBounds(ljX, yRow9, mWidth, height);
entryPanel.add(fontTypeLabel);
JLabel fontColorLabel = new JLabel("Select Font Color:");
fontColorLabel.setBounds(rjX, yRow9, mWidth, height);
entryPanel.add(fontColorLabel);
//the tenth row (entry)
fontTypeDrop = new JComboBox(fonts);
fontTypeDrop.setBounds(ljX, yRow10, dWidth, height);
fontTypeDrop.addFocusListener(new focusListen());
entryPanel.add(fontTypeDrop);
fontColorDrop = new JComboBox(colors);
fontColorDrop.setBounds(rjX, yRow10, dWidth, height);
fontColorDrop.addFocusListener(new focusListen());
entryPanel.add(fontColorDrop);
//the eleventh row (label)
JLabel fontSizeLabel = new JLabel("Select Font Size:");
fontSizeLabel.setBounds(ljX, yRow11, mWidth, height);
entryPanel.add(fontSizeLabel);
//the final row (entry)
fontSizeText = new JTextField("12", 2);
fontSizeText.setBounds(ljX, yRow12, tWidth, height);
fontSizeText.addFocusListener(new focusListen());
entryPanel.add(fontSizeText);
//display panel code
//use test parameters
//these will later be retrieved from the entries
drawCanvas.setParams("Hello", "roundRect", Color.red,
100, 100, "Serif", Color.black, 12);
//set the applet to visible
//set to visible and display
entire.setSize(800, 600);
entire.setVisible(true);
} //end the init method
//declare an inner class to handle events
private class focusListen implements FocusListener
//supply the implementation of the actionPerformed method
//pass an event variable as the argument
public void focusLost(FocusEvent e)
{ JOptionPane.showMessageDialog(null, "Focus lost."); }
//declare an empty focus gained function
public void focusGained(FocusEvent e) {}
} //end testListen class
} //end DemoShape classSorry for glossing over your code sample, particularly as it looks like one of the best I've seen so far on the forums, but I'm pretty sure the answer you are looking for is as follows:
Java doesn't render a component until paint() is called so until then you are not going to have any size settings because the jvm simply doesn't know how big the visual component is. This makes sense when you think about what the jvm is doing. The layout manager controls the display of the components depending on the settings it is supplied. So until it knows how many components you want, where, what kind of spacing, etc, etc, etc, how can the size be determined.
The true cycle of events is therefore:
create an instance of DisplayCanvas,
add it to your container,
make the container visible (which renders the component),
get the size of the DisplayCanvas instance.
You are being hampered because your desired chain of events is:
create an instance of DisplayCanvas,
get the size of the DisplayCanvas instance,
add it to your container,
make the container visible.
This state of affairs is highly annoying and then leads to the next question "what do we do about that?". There is a cunning trick which is to get the jvm to render the component to an off-screen image, thus calculating the dimensions of the component so that you can do precisely the kind of enquiry on the object that you have been looking for. It should be noted that this may not be the visual size for all the reasons given above, but it is the "preferred size" for the component. Check the Swing tutorials and have a look at the section on Layout Managers for a run down on what that means.
Anyway, we can use this handy code sample to determine the preferred size for your component. Notice the call to "paint()" (normally you would never make a direct call to paint() in swing) and the "g.dispose()" to free resources:
package com.coda.swing.desktool.gui;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
public class PaintUtil
public PaintUtil()
super();
public static Component paintBuffer(Component comp)
Dimension size = comp.getPreferredSize();
comp.setSize(size);
BufferedImage img = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = img.createGraphics();
comp.paint(g2);
g2.dispose();
return comp;
}Before you make a call to getWidth() or getHeight() put in a call to "PaintUtil.paintBuffer(this);" and see what happens.
By the way, I can't claim credit for this code ... and I really wish I could remember where I got it from myself so I can thank them :) -
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Hi,
I need to get the width and height of the selected rectangle in indesign cs3 and display the values in a dialog box for user verification.
Regards,
saranHi Saran,
InterfacePtr<IGeometry> itemGeo ( objectUIDRef, UseDefaultIID() );
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The crawled property of Image width and height - is there a differnce when the image is png format?
Hi,
We are indexing file share with images and get the properties of Image Width, Image Height, Image Size (we show it as refiners in SharePoint after make it managed properties). Somehow when the picture is png format - we see only Size but not height and width.
Is that any setting that should be done in the file share (when i select an image in the windows explorer window i can see all its properties, and it seems that png files do expose the width and height properties
keren tsurHi Keren,
According to your description, my understanding is that when you tried to crawl file share with images, the ows_ImageWidth and ows_ImageHeight crawled property for PNG file could not be generated.
For your issue, I can reproduce your issue in my SharePoint 2013 environment. For a workaround, you can upload the PNG images into SharePoint images Library and they would work fine.
Best Regards,
Eric
Eric Tao
TechNet Community Support -
I cannot get DW8 to insert the width and height automatically
whern inserting an imge. Can anyone help me with it. TIAI have just discovered that if you do the insertion when Code
view and
Design view are 'in synch', i.e., neither the Property
inspector nor the CSS
panel have a "Refresh" button, the width and height will be
inserted in Code
view.
Murray --- ICQ 71997575
Adobe Community Expert
(If you *MUST* email me, don't LAUGH when you do so!)
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"intedeco" <[email protected]> wrote in
message
news:ebdb54$5uq$[email protected]..
> Thanks ACE for the info. I am using the technique you
mentioned.
> However, I
> did not have this problem in DWMX. Also, according to
Macromedia 'HELP'
> it is
> inderted automatically. Thios is what is says:
>
>
W and H are the width and height of the image, in pixels.
Dreamweaver
> automatically updates these text boxes with the image?s
original
> dimensions
> when you insert an image in a page.
>
> Hopefully, next update will fix this!
> -
Getting maximum width and height of frame
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1. Using the frame editor on the timeline, I create a keyframe with a mixture of library symbols and text/graphics which are not symbols.
2. In AS3 I take all of the screen objects and make them children of a Sprite that I created in my AS3 script. I then delete the objects off the screen and pass the parent Sprite to a class that I use to manage the screen.
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how big you want to draw the stuff. You can make the
panel as big or small as you want and do your drawing
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Try it and see what happens. If you don't give the
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Here goes:
import javax.swing.*;
import java.awt.*;
class MyFrame extends JFrame {
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panel.setSize(200, 200);
int x = (int)(Math.random()*200);
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getContentPane().add(panel, BorderLayout.CENTER);
setSize(640, 480);
show();
public static void main(String[] args) {
new MyFrame();
} -
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Look at the height and width properties. They will be in pixels.
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Sam. -
Adobe Fireworks CS5: A way to change an existing slideshow export image width and height?
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(untested and without warranty)
replace this line:
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<mx:VBox width="100%" height="100%">
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<mx:HBox width="100%" height="10%">
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</mx:HBox>
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<mx:ProgressBar id="progressBar" indeterminate="true" visible="false" height="1%" />
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fileReference.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA, onUploadCompleteData);
FileBrowse();
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private function CreateFileReference():void
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allTypes = new Array(imageTypes);
fileReference = new FileReference();
fileReference.addEventListener(Event.SELECT, selectHandler);
fileReference.addEventListener(ProgressEvent.PROGRESS, fileRef_progress);
private function selectHandler(event:Event):void
var request:URLRequest = new URLRequest("http://"+TestLoginIntegration.GetServerAddress()+"/FileUpload/Default.aspx");
try
request.contentType = "application/octet-stream";
request.method = "POST";
fileReference.upload(request,fileReference.name,false);
catch (error:Error)
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private function fileRef_progress(evt:ProgressEvent):void
img.source = "";
progressBar.visible = true;
private function onUploadCompleteData (event : DataEvent) : void
var filePath:String = event.data;
img.source = filePath;
progressBar.visible = false;
txt_imgname.text = GetFileNameFromPath(filePath);
private function imageLoadListener(e:Event):void{
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private function GetFileNameFromPath(filepath:String):String
if(filepath == null || filepath == "")
return null;
var name:String = filepath.substring(filepath.lastIndexOf("/") + 1, filepath.length);
return name;Read this older post
http://forums.adobe.com/message/1900768#1900768 -
Please let me know on how to get the width and height of an eps file.
regards,
SashiThen you can read the properties from the list of file comments… (without opening in Illustrator) an example of the line would look like this…
%%HiResBoundingBox: 19.8906 4.45117 262.1094 63.5488
So read the file and use a regular expression to find this line… It is in 'points' but so is Illustrator scripting so you need calculate other measures if required…
I have a ready made function for this but its at home… I will post later if you have no luck with this… -
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