Question on Graphics Object

Dear all,
A Graphics object draw on some surface. It would be appreciated if anyone could explain to me which surface is the Graphics object is drawn on? How to determine? How to change it?
Many thanks!
Francis

Hello,
A graphics object is a graphic context : Every objects where you can draw something can be associated to a Graphics object.
For example, an image, an paper of a printer can have a Graphics abject.
Graphics contains graphical objects like in ps.
See Graphics objects as links.

Similar Messages

How to use a Graphics Object in a JSP?

Hello, I do not know if this is a good or a silly question. Can anyone tell me if we can use a Graphics object in a JSP. For example to draw a line or other graphics, i am planning to use the JSP. Any help is much appreciated.
Regards,
Navin Pathuru.

Hi Rob or Jennifer, could you pour some light here.
I have not done a lot of research for this, but what i want to do is below the polygon i would like to display another image object like a chart... is it possible? If so how to do it? Any help is much appreciated.
here is the code:
<%
// Create image
int width=200, height=200;
BufferedImage image = new BufferedImage(width,
height, BufferedImage.TYPE_INT_RGB);
// Get drawing context
Graphics g = image.getGraphics();
// Fill background
g.setColor(Color.white);
g.fillRect(0, 0, width, height);
// Create random polygon
Polygon poly = new Polygon();
Random random = new Random();
for (int i=0; i < 5; i++) {
poly.addPoint(random.nextInt(width),
random.nextInt(height));
// Fill polygon
g.setColor(Color.cyan);
g.fillPolygon(poly);
// Dispose context
g.dispose();
// Send back image
ServletOutputStream sos = response.getOutputStream();
JPEGImageEncoder encoder =
JPEGCodec.createJPEGEncoder(sos);
encoder.encode(image);
%>
Regards,
Navin Pathuru

How does one Float a Graphic Object with Text? (Don't want the Graphics Frame stationary)

I now know just enough InDesign to be dangerous. So, help me from blowing myself up.
SITUATION:
I desire a Callout/Quote Box to emphase a quote--to separate it from the flowing text of the manuscript. So, I created a curved-edge rectangle (graphic object) to make the "box", then filled it with the quoted text). All was well in the land of Adobe Novice UNTIL I deleted some text above the newly-created graphic box/quote box. I need the graphic to flow with (stay embedded in; hold its position in) the text outside the manuscript, not say anchored to page.
QUESTION:
Is there a way to have a graphic object which is placed in a manuscript flow with the manuscript text, so that it "holds its position" relative to the text. For example, if I delete a paragraph of text above the graphic object, I want the graphic object to adjust accordingly.
ASIDE:
I am open to any other tricks or methods others use to insert callout or quote-boxes within the flowing text of a manuscript/book.
Thanks in advance.

Create your callout. If you will use it often, you can actually grab it and drag it to the desktop for reuse in any Document; it becomes an InDesign Snippet (.inds).
Copy the callout graphic, insert your text curser into the text frame where you want the callout. You've just Anchored an Object.
This is where you want to read up on Anchored Objects. You can highlight and baseline shift the callout (often necessay for anchored objects) , change leading, apply text wrap with standoff (you would select it with the selection tool for this), all of which are way beyond what I have ever tried, but managed it in less than 3 minutes. Basically treat it as a selection of type. The challenges will be line breaks, keep with, gosh knows.
Bob mentioned CS5.5 has more friendly features, which I am not familiar with, and are beyond quick replies.
Work through the above at your discretion, ask more DIRECT questions as needed, and you will get help.

Saving Graphics Object

Is it possible to transfer a Graphics Object to another Canvas so that I can use the painted graphics there?
I have a canvas, where some texts and boxes are painted. Now I want to start another Canvas, where the user can move a Pointer in the Graphic of the other Canvas.
So I thought I hand over the Graphics-Object to my new Canvas and overwrite my actual Graphics-Object. Now I want to paint a crosspointer and move it on the screen.
I hope anyone has understood this stupid question.
Great_T

You have to use "manual" double buffering:
private Image image = Image.creaneImage(this.getWeight(), this.getHeight());
private Graphics graphics = image.getGraphics();
Paint to graphics.
public void paint(Graphics g) {
g.drawImage(image, 0, 0, Graphics.TOP | Graphics.LEFT);
Then pass your image in the new Canvas and continue to paint to it's
Graphics object
I hope this is helpful.

How to convert a Graphics object into a JPG image?

I have this simple question about how to make a Graphics object into a JPG file...
I just need the names of the classes or the packages ... I'll figure out the rest of the details...
Thanks...

Anyway this might come in handy
JPEGUtils.java
============
* Created on Jun 22, 2005 by @author Tom Jacobs
package tjacobs.jpeg;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageDecoder;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
* Utilities for saving JPEGs and GIFs
public class JPEGUtils {
     private JPEGUtils() {
          super();
     public static void saveJPEG(BufferedImage thumbImage, File file, double compression) throws IOException {
          BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file));
          saveJPEG(thumbImage, out, compression);
          out.flush();
          out.close();
     public static void saveJPEG(BufferedImage thumbImage, OutputStream out, double compression) throws IOException {
          JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
          JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(thumbImage);
          compression = Math.max(0, Math.min(compression, 100));
          param.setQuality((float)compression / 100.0f, false);
          encoder.setJPEGEncodeParam(param);
          encoder.encode(thumbImage);
     public static BufferedImage getJPEG(InputStream in) throws IOException {
          try {
               JPEGImageDecoder decode = JPEGCodec.createJPEGDecoder(in);
               BufferedImage im = decode.decodeAsBufferedImage();
               return im;
          } finally {
               in.close();
     public static BufferedImage getJPEG(File f) throws IOException {
          InputStream in = new BufferedInputStream(new FileInputStream(f));
          return getJPEG(in);
     public static void saveGif(RenderedImage image, File f) throws IOException {
          saveGif(image, new FileOutputStream(f));
     public static void saveGif(RenderedImage image, OutputStream out) throws IOException {
//          Last time I checked, the J2SE 1.4.2 shipped with readers for gif, jpeg and png, but writers only for jpeg and png. If you haven't downloaded the whole JAI, and you want a writer for gif (as well as readers and writers for several other formats) download:
//          http://java.sun.com/products/java-media/jai/downloads/download-iio.html
          ImageIO.write(image, "gif", out);
     public static void main(String[] args) {
          // TODO Auto-generated method stub
}

Zoom a 2D graphic object

we can zoom a 2D graphic object by scale x,y coordinates.
For instance, a rectangle will be enlarged to double size by doubling the coordinates,
My question is to seek the idea of keeping the object size unchanged but zoom the inside detail?
Just like mapquest,click zoom button more details will be clearly seen but the frame size unchanged?
Thanks

There are a couple of solutions to this that I can think of.
The first would be to have bitmaps prerendered at multiple resolutions with all the detail necessary for that resolution, and then display the lowest resolution image that gives the greatest amount of detail for the resolution needed by the application at the time. This method is used in 3d graphics programs to show lower detail textures on objects that are farther away.
For very high magnifications, the large images may have to be partitiioned into multiple subimages, and of course you would only display the ones necessary to fill the viewing window.
The other method would be to not use bitmaps at all, but store things as Shapes, which you can scale as required via an appropriate AffineTransform as necessary.
These two methods are not at all mutually exclusive, so combining them and using bitmaps in one area and scaled shapes in another is entirely possible.

Graphics object disappears

Hi,
My question is - why when I paint a graphics object (a java 2D object) onto a Frame , my graphics object appears on the screen for literally a split second and then disappears.
How can I prevent this?
Here's the code:
public void paintSimple()
Graphics h = null;
show();
h = this.getContentPane().getGraphics() ;
Polygon p = new Polygon();
p.addPoint(1,34);
p.addPoint(23, 344);
p.addPoint(234, 3);
p.addPoint(12,42);
h.setColor(Color.magenta);
h.drawLine(1,222,333,44);
this.getContentPane().update(h);
Thanks,
rpodolny

Hi,
Just a quick idea ...
Your class possibly extends frame ...
then overwrite the following:
public void paint(Graphics g) {
update(g);
and ...
public void update(Graphics g) {
Graphics2D gd = (Graphics2D) g;
Polygon p = new Polygon();
p.addPoint(1,34);
p.addPoint(23, 344);
p.addPoint(234, 3);
p.addPoint(12,42);
gd.setColor(Color.magenta);
gd.drawLine(1,222,333,44);
//probably draw you Polygon somewhere ....
I hope this is helping a bit. I think that the image is drawn and the over-drawn immediately after in the underlying methods. Now your drawing should be painted in every update so it should stay on the screen ...
Hope this helps,
Tim

Null Graphics objects

Hello, I am attempting to write a java program that places a graph within a panel that the user can interact with. I have chosen Canvas() as the method to acieve this, but am running into problems with the instantiation of the graphics object- it keeps returning null, and I haven't the faitest idea why. Here is my code in question:
Canvas canvas = new Canvas();
Graphics g = canvas.getGraphics();
'g' is null- when I try to call g.drawLine(), it gives me a nullPointerException. Any help or information about why this is occuring would be greatly appreciated.

Well, I figured out that I needed to add the canvas to the contentPane before it had a Graphics object associated with it. But now, where the canvas is, there is a just a gray box. SetColor doesn't work, drawLine doesn't work, nothing. Here is the code:
Canvas canvas = new Canvas();
contentPane.add(canvas, BorderLayout.WEST);
show();
Graphics g = canvas.getGraphics();
Color white = new Color (255,255,255);
g.setColor(white);
setSize(300,200);
//Sets up the graph lines and tic marks
int size = 100;
g.drawLine(0, 0, size, 0);
g.drawLine(0, 0, 0, size);
//Horizontal tics
g.drawLine((size/4), 0, (size/4), (size/10));
g.drawLine((size/2), 0, (size/2), (size/10));
g.drawLine(((3*size)/4), 0, ((3*size)/4), (size/10));
g.drawLine(size, 0, size, (size/10));
//Vertical tics
g.drawLine(0, (size/4), (size/10), (size/4));
g.drawLine(0, (size/2), (size/10), (size/2));
g.drawLine(0, ((3*size)/4), (size/10), ((3*size)/4));
g.drawLine(0, size, (size/10), size);
show();
As I said, it compiles and runs fine, but there are no lines set up. I even added a bunch of show() statements as a desperate effort to get something to show up. Can anyone help? Thanks
I hate programming.

How to change font/ font color etc in a graphic object using JCombobox?

Hello
My program im writing recently is a small tiny application which can change fonts, font sizes, font colors and background color of the graphics object containing some strings. Im planning to use Jcomboboxes for all those 4 ideas in implementing those functions. Somehow it doesnt work! Any help would be grateful.
So currently what ive done so far is that: Im using two classes to implement the whole program. One class is the main class which contains the GUI with its components (Jcomboboxes etc..) and the other class is a class extending JPanel which does all the drawing. Therefore it contains a graphics object in that class which draws the string. However what i want it to do is using jcombobox which should contain alit of all fonts available/ font sizes/ colors etc. When i scroll through the lists and click the one item i want - the graphics object properties (font sizes/ color etc) should change as a result.
What ive gt so far is implemented the jcomboboxes in place. Problem is i cant get the font to change once selecting an item form it.
Another problem is that to set the color of font - i need to use it with a graphics object in the paintcomponent method. In this case i dnt want to create several diff paint.. method with different property settings (font/ size/ color)
Below is my code; perhaps you'll understand more looking at code.
public class main...
Color[] Colors = {Color.BLUE, Color.RED, Color.GREEN};
        ColorList = new JComboBox(Colors);
ColorList.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ev) {
                 JComboBox cb = (JComboBox)ev.getSource();
                Color colorType = (Color)cb.getSelectedItem();
                drawingBoard.setBackground(colorType);
          });;1) providing the GUI is correctly implemented with components
2) Combobox stores the colors in an array
3) ActionListener should do following job: (but cant get it right - that is where my problem is)
- once selected the item (color/ font size etc... as i would have similar methods for each) i want, it should pass the item into the drawingboard class (JPanel) and then this class should do the job.
public class DrawingBoard extends JPanel {
       private String message;
       public DrawingBoard() {
              setBackground(Color.white);
              Font font = new Font("Serif", Font.PLAIN, fontSize);
              setFont(font);
              message = "";
       public void setMessage(String m) {
            message = m;
            repaint();
       public void paintComponent(Graphics g) {
              super.paintComponent(g);
              //setBackground(Color.RED);
              Graphics2D g2 = (Graphics2D) g;
              g2.setRenderingHint
              g2.drawString(message, 50, 50);
       public void settingFont(String font) {
            //not sure how to implement this?                          //Jcombobox should pass an item to this
                               //it should match against all known fonts in system then set that font to the graphics
      private void settingFontSize(Graphics g, int f) {
                     //same probelm with above..
      public void setBackgroundColor(Color c) {
           setBackground(c);
           repaint(); // still not sure if this done corretly.
      public void setFontColor(Color c) {
                //not sure how to do this part aswell.
               //i know a method " g.setColor(c)" exist but i need to use a graphics object - and to do that i need to pass it in (then it will cause some confusion in the main class (previous code)
       My problems have been highlighted in the comments of code above.
Any help will be much appreciated thanks!!!

It is the completely correct code
I hope that's what you need
Just put DrawingBoard into JFrame and run
Good luck!
public class DrawingBoard extends JPanel implements ActionListener{
     private String message = "message";
     private Font font = new Font("Serif", Font.PLAIN, 10);
     private Color color = Color.RED;
     private Color bg = Color.WHITE;
     private int size = 10;
     public DrawingBoard(){
          JComboBox cbFont = new JComboBox(GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames());
          cbFont.setActionCommand("font");
          JComboBox cbSize = new JComboBox(new Integer[]{new Integer(14), new Integer(13)});
          cbSize.setActionCommand("size");
          JComboBox cbColor = new JComboBox(new Color[]{Color.BLUE, Color.RED, Color.GREEN});
          cbColor.setActionCommand("color");
          JComboBox cbBG = new JComboBox(new Color[]{Color.BLUE, Color.RED, Color.GREEN});
          cbBG.setActionCommand("bg");
          add(cbFont);
          cbFont.addActionListener(this);
          add(cbSize);
          cbSize.addActionListener(this);
          add(cbColor);
          cbColor.addActionListener(this);
          add(cbBG);
          cbBG.addActionListener(this);
     public void setMessage(String m){
          message = m;
          repaint();
     protected void paintComponent(Graphics g){
          super.paintComponent(g);
          Graphics2D g2 = (Graphics2D)g;
          g2.setColor(bg);//set background color
          g2.fillRect(0,0, getWidth(), getHeight());
          g2.setColor(color);//set text color
          FontRenderContext frc = g2.getFontRenderContext();
          TextLayout tl = new TextLayout(message,font,frc);//set font and message
          AffineTransform at = new AffineTransform();
          at.setToTranslation(getWidth()/2-tl.getBounds().getWidth()/2,
                    getWidth()/2 + tl.getBounds().getHeight()/2);//set text at center of panel
          g2.fill(tl.getOutline(at));
     public void actionPerformed(ActionEvent e){
          JComboBox cb = (JComboBox)e.getSource();
          if (e.getActionCommand().equals("font")){
               font = new Font(cb.getSelectedItem().toString(), Font.PLAIN, size);
          }else if (e.getActionCommand().equals("size")){
               size = ((Integer)cb.getSelectedItem()).intValue();
          }else if (e.getActionCommand().equals("color")){
               color = (Color)cb.getSelectedItem();
          }else if (e.getActionCommand().equals("bg")){
               bg = (Color)cb.getSelectedItem();
          repaint();
}

Trying to move a graphics object using buttons.

Hello, im fairly new to GUI's. Anyway I have 1 class which makes my main JFrame, then I have another 2 classes, one to draw a lil square graphics component (which iwanna move around) which is placed in the center of my main frame and then another class to draw a Buttonpanel with my buttons on which is placed at the bottom of my main frame.
I have then made an event handling class which implements ActionListner, I am confused at how I can get the graphics object moving, and where I need to place the updateGUI() method which the actionPerformed method calls from inside the event handling class.
I am aware you can repaint() graphics and assume this would be used, does anyone have a good example of something simular being done or could post any help or code to aid me, thanks!

Yeah.. here's an example of custom painting on a JPanel with a box. I used a mouse as it was easier for me to setup than a nice button panel on the side.
Anyways... it should make it pretty clear how to get everything setup, just add a button panel on the side. and use it to move the box instead of the mouse.
-Js
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.event.MouseInputAdapter;
public class MoveBoxAroundExample extends JFrame
     private final static int SQUARE_EDGE_LENGTH = 40;
     private JPanel panel;
     private int xPos;
     private int yPos;
     public MoveBoxAroundExample()
          this.setSize(500,500);
          this.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
          this.setContentPane(getPanel());
          xPos = 250;
          yPos = 250;
          this.setVisible(true);
     private JPanel getPanel()
          if(panel == null)
               panel = new JPanel()
                    public void paintComponent(Graphics g)
                         super.paintComponent(g);
                         g.setColor(Color.RED);
                         g.fillRect(xPos-(SQUARE_EDGE_LENGTH/2), yPos-(SQUARE_EDGE_LENGTH/2), SQUARE_EDGE_LENGTH, SQUARE_EDGE_LENGTH);
               MouseInputAdapter mia = new MouseInputAdapter()
                    public void mousePressed(MouseEvent e)
                        xPos = e.getX();
                        yPos = e.getY();
                        panel.repaint();
                    public void mouseDragged(MouseEvent e)
                        xPos = e.getX();
                        yPos = e.getY();
                        panel.repaint();
               panel.addMouseListener(mia);
               panel.addMouseMotionListener(mia);
          return panel;
     public static void main(String args[])
          new MoveBoxAroundExample();
}

Question about graphic card

Question about graphic card
my friend has Macbook pro 13 with intel HD 3000 he upgraded his ram from 4 to 8gb and his graphic card updated from 384mb to 512mb why ?
and i have macbook 2010 and i upgraded from 2gb to 8gb and my graphic card didnt upgraded why ? its still 256mb
can someone till me whats the trick !!!

You have a Core 2 Duo MacBook and not a i7 MacBook Pro.

Creating new graphics object from a existing one and sending it for print

Hello,
i have a graphics object which is big in size, I am creating a new graphics object from the existing one as given below
//map is a graphic object
Graphic g1 = (Graphic)map.create(x,y,width,height);
Graphic g2 = (Graphic)map.create(x,y,width1,height1);
Graphic g3 = (Graphic)map.create(x,y,width2,height2);
arrayList.add(g1);
arrayList.add(g2);
arrayList.add(g3);
Now I want to send the graphic object g1,g2,g3 for print in the method
public int print (Graphics g, PageFormat pf, int idx) throws PrinterException {
// Printable's method implementation
if (curPageFormat != pf) {
curPageFormat = pf;
pages = repaginate (pf);
if (idx >= 3)) {
return Printable.NO_SUCH_PAGE;
g = (Graphics) arrayList.get(idx);
return Printable.PAGE_EXISTS;
This is not working... what is wrong. can anybody suggest..
I tried standardprint.java to print a object inside a scrollpane, it is not printing the entire diagram. so I am thinking of something like this.... Please let me know what to do....
Thanks
Serj

The easy way to do this is create a copy using Windows Explorer.
Open the project and go to File > Rename.
Then you have your 2013 ready made project.
See www.grainge.org for RoboHelp and Authoring tips
@petergrainge

Problem with decimal data visualization in a circular graphic object type

When we are design a report using Crystal Reports 2008 we found the following problem. When we insert an object of type circle graphic selecting the option in the graphics wizard for view in the legend data both in value and percentage (u2018bothu2019 design) we cant show them in a two decimals format at the same time.
Using the option u2018number formatu2019 and indicating two decimals only affects the value but not the percentage.
Show both the value and the percentage with two decimals at same time itu2019s a necessary requirement for our report design.
Is there any way to show both the value and the percentage in a circle graphic object with two decimals at the same time?
Thanks.

hello Jose,
i am not sure what you mean by "circular graphic object type".
there's nothing in the standard cr 2008 build that has this that i've ever found that creates a circle other than inserting a box and changing the rounding on the corners. if you're using a 3rd party product or add-on you'll need to contact whoever built it.
cheers,
jamie

Best way to draw thousands of graphic objects on the screen

Hello everybody, I'm wanting to develop a game where at times thousands of graphic objects are displayed on-screen. What better way to do this in terms of performance and speed?
I have some options below. Do not know if the best way is included in these options.
1 - Each graphical object is displayed on a MovieClip or Sprite.
2 - There is a Bitmap that represents the game screen. All graphical objects that are displayed on screen have your images stored in BitmapData. Then the Bitmap that represents the game screen copies for themselves the BitmapData of graphical objects to be screened, using for this bitmapData.copyPixels (...) or BitmapData.draw (...). The Bitmap that represents the screen is added to the stage via addChild (...).
3 - The graphical objects that are displayed on screen will have their images drawn directly on stage or in a MovieClip/Sprite added to this stage by addChild (...). These objects are drawn using the methods of the Graphics class, as beginBitmapFill and beginFill.
Recalling that the best way probably is not one of these 3 above.
I really need this information to proceed with the creation of my game.
Please do not be bothered with my English because I'm using Google translator.
Thank you in advance any help.

Thanks for the information kglad. =)
Yes, my game will have many objects similar in appearance.
Some other objects will use the same image stored, just in time to render these objects is that some effects (such as changing the colors) will be applied in different ways. But the picture for them all is the same.
Using the second option, ie, BitmapDatas, which of these two methods would be more efficient? copyPixels or draw?
Thank you in advance any help. =D

Technical interview questions on this objects

Hi every one i am putting some objects in my resume can any one tell me the all possible questions on these objects.
my id is [email protected]
Reports:
     Developed a Report to display the values of Total Finished Goods filtered by Plant.
     Created an Interactive Report for displaying vendor information. Based on the selection made the corresponding Vendor Details are listed such that the line selected in the basic list was visible along with the secondary list.
     Developed a Report, which calculates the delivery values and sales for a particulars month and year including total quantities.
     Created reports in SD module such as sales order report, which covers all organization levels, delivery status, invoice status, shipping details and partner function details.
      Conversions:
     Designed and coded a BDC program to migrate Vendor Master Data from legacy system to SAP R/3 database.
     Designed and coded a BDC program to Update and Change Vendor Master Data from legacy system to SAP R/3 database.
     Designed and coded a BDC program to migrate Material Master Data from legacy system to SAP R/3 database.
      SAP Scripts:
     Modified Standard Script MEDRUCK according to client requirements.
     Modified Standard Script SAPFM06P according to client requirements.

Hi every one i am putting some objects in my resume can any one tell me the all possible questions on these objects.
my id is [email protected]
Reports:
     Developed a Report to display the values of Total Finished Goods filtered by Plant.
     Created an Interactive Report for displaying vendor information. Based on the selection made the corresponding Vendor Details are listed such that the line selected in the basic list was visible along with the secondary list.
     Developed a Report, which calculates the delivery values and sales for a particulars month and year including total quantities.
     Created reports in SD module such as sales order report, which covers all organization levels, delivery status, invoice status, shipping details and partner function details.
      Conversions:
     Designed and coded a BDC program to migrate Vendor Master Data from legacy system to SAP R/3 database.
     Designed and coded a BDC program to Update and Change Vendor Master Data from legacy system to SAP R/3 database.
     Designed and coded a BDC program to migrate Material Master Data from legacy system to SAP R/3 database.
      SAP Scripts:
     Modified Standard Script MEDRUCK according to client requirements.
     Modified Standard Script SAPFM06P according to client requirements.

Question on Graphics Object

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