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Thread: drawImage help! :(

  1. #1
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    Default drawImage help! :(

    I'm trying to draw an image inside a jScrollPane, or in any other scrollable type of panel... can someone please give me a VERY simple method as I'm new to java.. I have read all about jScrollPane on Oracle and about drawImage but can't find a way to do it ... :/ can someone please explain whats wrong?

    BufferedImage img;
    img = ImageIO.read(new File("C:\\apple.png"));
    Graphics g = jScrollPane1.getGraphics();
    g.drawImage(img, 0, 0, 100, 100, rootPane);

    //I also tried to use paintComponents... but .. not successful.


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    Default Re: drawImage help! :(

    It looks correct to me. What is the error message?

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    Default Re: drawImage help! :(

    I don't get an image showing... the directory is good.. no error message.. it runs, but empty.. :s I've been trying for hours .. just frustrated heh.

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    Default Re: drawImage help! :(

    I also tried to use paintComponents.
    Remove the s from the method name.
    Can you post the code where you override the paintComponent method of a JPanel and call drawImage there?

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    Default Re: drawImage help! :(

    I wrote an article on Image processing a few months ago. It may be worth while checking out.

    This is a stripped down version of the JPanel

     
    import java.awt.Graphics;
    import java.awt.Graphics2D;
    import java.awt.image.BufferedImage;
    import javax.swing.JPanel;
    import java.io.File;
    import java.io.IOException;
    import javax.imageio.*;
     
    public class ImageJPanel extends JPanel {
     
    public BufferedImage image;
     
    public void loadImage(File imageFile) {
    	try {
    		image = ImageIO.read(imageFile);
    	} catch (IOException ex) {
    		String directory = new File(".").getAbsolutePath();
    		System.err.println("Could not open " + imageFile.getAbsolutePath() + " at " + directory);
    		System.exit(-1);
    	}	
    }
     
    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        g.drawImage(image, 0, 0, null);  //draws the image
    }
     
     
    public ImageJPanel() {
            String filename = "myFile.jpg";
            File imageFile = new File(filename);
    	loadImage(imageFile);
    }

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    Default Re: drawImage help! :(

    ChristopherLowe but then how do you put that into the JPanel you want? or how do you trigger it I tried adding for example:

    ImageJPanel jPanelNew = new ImageJPanel();
    jPanelNew.loadImage("C:\\apple.png");

    also tried: jPanel1.add(jPanelNew); (in netbeans to get the things from that.. but nothing aswell)

    and turned some things around so it does that but still nothing comes up :s.. am I calling it wrong? :s Iam using netbeans, and have a jPanel1 on the gui but.. have no idea how to declare it.. :s

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    Default Re: drawImage help! :(

    IF you are getting error messages, please copy the full text and paste them here

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    Default Re: drawImage help! :(

    You add the JPanel to a JFrame.

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