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Thread: Problem with saving image to a file

  1. #1
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    Default Problem with saving image to a file

    This code my code, but it does not save the image just blank page. PLEASE HELP


    import java.awt.Graphics2D;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import javax.imageio.ImageIO;
    import javax.swing.JFrame;




    class SaveButtonAction implements ActionListener {


    DataContainer dcRef = null;
    ActionContainer ac = null;
    DrawingCanvas drawingPanel = null;
    String cmd = null;
    JFrame f = new JFrame();


    SaveButtonAction(DataContainer dc, ActionContainer ac, DrawingCanvas drawingPanel) {

    dcRef = dc;
    this.ac = ac;
    this.drawingPanel = drawingPanel;

    }


    public void actionPerformed(ActionEvent e) {
    System.out.println("[savebutton] pushed");

    //sets up the action similar to plot
    drawingPanel.plotPie(cmd); // plot pie charts


    //set up graphics 2d

    try {

    BufferedImage image =
    new BufferedImage( 120, 120, BufferedImage.TYPE_INT_RGB);
    Graphics2D graphics2D = image.createGraphics();
    f.paint( graphics2D );
    graphics2D.dispose();
    ImageIO.write(image, "png", new File("AA.png"));
    } catch (Exception ex) {
    ex.printStackTrace();
    }

    //call the drawpanel.repaint();

    drawingPanel.repaint(); // draw
    }

    }

    public class SaveButton extends GButton {

    SaveButton(String name, DataContainer dcRef, ActionContainer ac, DrawingCanvas drawingPanel) {
    super(name, dcRef);

    SaveButtonAction action = new SaveButtonAction(dcRef, ac, drawingPanel);
    addActionListener(action);
    }

    }
    Last edited by Wise girl; June 14th, 2012 at 01:41 AM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Problem with saving image to a file

    Please Edit your post and wrap your code with[code=java]<YOUR CODE HERE>[/code] to get highlighting.

    The code works for me when I put it in a simple GUI program.
    Last edited by Norm; June 14th, 2012 at 09:33 AM.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Problem with saving image to a file

    Yes, but this code does not work maybe it requires JPanel.

  4. #4
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    Default Re: Problem with saving image to a file

    If you want help with the code, Please Edit your post and wrap your code with[code=java]<YOUR CODE HERE>[/code] to get highlighting
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Default Re: Problem with saving image to a file

    < import java.awt.Graphics2D;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import javax.imageio.ImageIO;
    import javax.swing.JFrame;
     
     
     
     
    class SaveButtonAction implements ActionListener {
     
     
    DataContainer dcRef = null;
    ActionContainer ac = null;
    DrawingCanvas drawingPanel = null;
    String cmd = null;
    JFrame f = new JFrame();
     
     
    SaveButtonAction(DataContainer dc, ActionContainer ac, DrawingCanvas drawingPanel) {
     
    dcRef = dc;
    this.ac = ac;
    this.drawingPanel = drawingPanel;
     
    }
     
     
    public void actionPerformed(ActionEvent e) {
    System.out.println("[savebutton] pushed"); 
     
    //sets up the action similar to plot
    drawingPanel.plotPie(cmd); // plot pie charts
     
     
    //set up graphics 2d
     
    try {
     
    BufferedImage image = 
    new BufferedImage( 120, 120, BufferedImage.TYPE_INT_RGB);
    Graphics2D graphics2D = image.createGraphics();
    f.paint( graphics2D );
    graphics2D.dispose();
    ImageIO.write(image, "png", new File("AA.png"));
    } catch (Exception ex) {
    ex.printStackTrace();
    }
     
    //call the drawpanel.repaint();
     
    drawingPanel.repaint(); // draw
    }
     
    }
     
    public class SaveButton extends GButton {
     
    SaveButton(String name, DataContainer dcRef, ActionContainer ac, DrawingCanvas drawingPanel) {
    super(name, dcRef);
     
    SaveButtonAction action = new SaveButtonAction(dcRef, ac, drawingPanel);
    addActionListener(action);
    }
     
    } >

  6. #6
    Super Moderator Norm's Avatar
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    Default Re: Problem with saving image to a file

    Why do all the statements begin in first column? The code needs to be properly formatted with indentations. The posted code is not more readable in code tags because it is not indented properly.

    Please copy the code from your editor with its indentations and post it with the indentations.
    If you don't understand my answer, don't ignore it, ask a question.

  7. #7
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    Default Re: Problem with saving image to a file

    <
    import java.awt.Graphics2D;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import javax.imageio.ImageIO;
    import javax.swing.JFrame;
     
     
     
     
    class SaveButtonAction implements ActionListener {
     
     
    	DataContainer dcRef = null;
    	ActionContainer ac = null;
    	DrawingCanvas drawingPanel = null;
    	String cmd = null;
    	JFrame f = new JFrame();
     
     
    	SaveButtonAction(DataContainer dc, ActionContainer ac, DrawingCanvas drawingPanel) {
     
    		dcRef = dc;
    		this.ac = ac;
    		this.drawingPanel = drawingPanel;
     
    	}
     
     
    	public void actionPerformed(ActionEvent e) {
    		System.out.println("[savebutton] pushed"); 
    		//sets up the action  similar to plot
    	    drawingPanel.plotPie(cmd);
     
     
    		//set up graphics 2d
     
    		try {
     
    			BufferedImage image = 
    			new BufferedImage( 120, 120, BufferedImage.TYPE_INT_RGB);
    			Graphics2D graphics2D = image.createGraphics();
    			f.paint( graphics2D );
    			graphics2D.dispose();
    			ImageIO.write(image, "gif", new File("AA.gif"));
    			} catch (Exception ex) {
    			ex.printStackTrace();
    			}
     
    	   //call the drawpanel.repaint();
     
    		drawingPanel.repaint();
    			}
     
    	}
     
    public class SaveButton extends GButton {
     
    	    SaveButton(String name, DataContainer dcRef, ActionContainer ac, DrawingCanvas drawingPanel) {
    		super(name, dcRef);
     
    		SaveButtonAction action = new SaveButtonAction(dcRef, ac, drawingPanel);
    		addActionListener(action);
    	}
     
    }
    >

  8. #8
    Super Moderator Norm's Avatar
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    Default Re: Problem with saving image to a file

    Quote Originally Posted by Wise girl View Post
    <
    import java.awt.Graphics2D;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import javax.imageio.ImageIO;
    import javax.swing.JFrame;
     
     
     
     
    class SaveButtonAction implements ActionListener {
     
     
    	DataContainer dcRef = null;
    	ActionContainer ac = null;
    	DrawingCanvas drawingPanel = null;
    	String cmd = null;
    	JFrame f = new JFrame();
     
     
    	SaveButtonAction(DataContainer dc, ActionContainer ac, DrawingCanvas drawingPanel) {
     
    		dcRef = dc;
    		this.ac = ac;
    		this.drawingPanel = drawingPanel;
     
    	}
     
     
    	public void actionPerformed(ActionEvent e) {
    		System.out.println("[savebutton] pushed"); 
    		//sets up the action  similar to plot
    	    drawingPanel.plotPie(cmd);
     
     
    		//set up graphics 2d
     
    		try {
     
    			BufferedImage image = 
    			new BufferedImage( 120, 120, BufferedImage.TYPE_INT_RGB);
    			Graphics2D graphics2D = image.createGraphics();
    			f.paint( graphics2D );
    			graphics2D.dispose();
    			ImageIO.write(image, "gif", new File("AA.gif"));
    			} catch (Exception ex) {
    			ex.printStackTrace();
    			}
     
    	   //call the drawpanel.repaint();
     
    		drawingPanel.repaint();
    			}
     
    	}
     
    public class SaveButton extends GButton {
     
    	    SaveButton(String name, DataContainer dcRef, ActionContainer ac, DrawingCanvas drawingPanel) {
    		super(name, dcRef);
     
    		SaveButtonAction action = new SaveButtonAction(dcRef, ac, drawingPanel);
    		addActionListener(action);
    	}
     
    }
    >

    How do you test this code? It does not have a main() method.
    If you don't understand my answer, don't ignore it, ask a question.

  9. #9
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    Default Re: Problem with saving image to a file

    The main method is in another class (GUIApp class)

    <import java.awt.BorderLayout;
     
     
    import java.awt.Color;
    import java.awt.GridLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import javax.swing.BorderFactory;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.JTextField;
     
     
     
    class EntryAction implements ActionListener{
     
    	JTextField tRef = null;
    	public EntryAction(JTextField tRef ){
     
    	this.tRef= tRef;
    	}
     
    	@Override
    	public void actionPerformed(ActionEvent e) {
    		System.out.println("key event action:"+ tRef.getText());
    		tRef.setText( " ");
    		//push in stack
    		//String cmd1 = set dataname 1 "Apple";
    	}
     
     
     
    }
     
    public class GuiApp extends JFrame {
     
    	DataContainer dc = null;
    	ActionContainer ac = null;
     
     
     
     
    	GuiApp() {
    		super();
     
    		dc = new DataContainer();
    		ac = new ActionContainer();
     
     
    		DrawingCanvas drawingPanel = new DrawingCanvas( 600, 500, ac, dc);
    		drawingPanel.setBackground(Color.white);
     
    		JPanel controlPanel = new JPanel();
    		JPanel controlPanel1 = new JPanel();
     
    		controlPanel.setLayout( new GridLayout(4, 1, 2, 2));
    		controlPanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
     
    		LoadButton loadButton = new LoadButton("load", dc);
    		PlotButton plotButton = new PlotButton("plot!", dc, ac, drawingPanel);
    		SaveButton saveButton = new SaveButton("save",dc, ac, drawingPanel);
     
    		setLayout( new BorderLayout (5, 10) );
    		JTextField entryField = new JTextField(55);	
    		controlPanel1.add(entryField );
    		entryField.addActionListener(new EntryAction(entryField));
     
     
    		controlPanel.add( loadButton );
    		controlPanel.add( plotButton );
    		controlPanel.add(saveButton );
     
     
    		add( drawingPanel, BorderLayout.CENTER );
    		add( controlPanel, BorderLayout.EAST );
    		add( controlPanel1, BorderLayout.SOUTH);
     
    		setTitle("GUI-App");
    		setSize(700,500);
    		setLocationRelativeTo(null);
    		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		setVisible(true);
     
    	}
     
    	public static void main(String[] args) {
    		new GuiApp();
    	}
    }>

  10. #10
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    Default Re: Problem with saving image to a file

    The code you posted does not compile without many errors.
    Can you make a small simpler program that compiles, executes and shows the problem?

    There are too many parts to the code you are posting to work with.

    This code from your first post worked for me:


    try {
     BufferedImage image =  new BufferedImage( 120, 120, BufferedImage.TYPE_INT_RGB); 
     Graphics2D graphics2D = image.createGraphics();
    f.paint( graphics2D );
     graphics2D.dispose();
     ImageIO.write(image, "png", new File("AA.png"));
    } catch (Exception ex) {
      ex.printStackTrace();
    }
    Last edited by Norm; June 14th, 2012 at 03:45 PM.
    If you don't understand my answer, don't ignore it, ask a question.

  11. #11
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    Default Re: Problem with saving image to a file

    So, can I send my application as a jar file to your email?

  12. #12
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    Default Re: Problem with saving image to a file

    No, for testing, I would like a small, simple program that compiles, executes and shows the problem.
    If you don't understand my answer, don't ignore it, ask a question.

  13. #13
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    Default Re: Problem with saving image to a file

    Thank you a lot. It works now

    The problem was

    <f.paint( graphics2D );
    The correct is

    <drawingPanel.paint( graphics2D );>

  14. #14
    Super Moderator Norm's Avatar
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    Default Re: Problem with saving image to a file

    Glad you got it working.
    If you don't understand my answer, don't ignore it, ask a question.

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