[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 225
  • Last Modified:

BeanBox: ImageIcon doesn't show

Could anybody tell me why the following bean (packed in
a jar of course) doesn't show the icon my.gif in the BeanBox,
only the JTextField is visible. When I instantiate MyBean
in a program, put it into a container of type JComponent
both are visible, the icon as well as the textfield.
Somehow the icon get's lost in the beanbox.

I attached the code of the bean and the MANIFEST of
the affiliated jar. Maybe there is a problem with
the paths, maybe the icon must be specified as some
kind of resource in the manifest, or the icon some-
how gets painted over (it is there but I cannot see
it) ...????


import com.sun.java.swing.*;
import com.sun.java.swing.event.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.*;
import java.io.Serializable;


public class MyBean extends JPanel implements Serializable {
  JTextField textField;

  public MyBean() {
    setPreferredSize(new Dimension(300, 200));
    add(new JLabel(new ImageIcon("icons/my.gif")));
    textField = new JTextField(15);
    add(textField);
    textField.addKeyListener(new KeyAdapter() {
      ...
    });
  }

    /*public void paint(Graphics g) {
        g.setColor(beanColor);
        g.fillRect(20, 5, 20, 30);
    }*/

  public Dimension getMinimumSize() {
    return new Dimension(250, 100);
  }

  public void setString(String text) {
    textField.setText(text);
  }

  public String getString() {
    return textField.getText();
  }

  public Color getColor() {
    return beanColor;
  }

  public void setColor(Color newColor) {
    beanColor = newColor;
    repaint();
  }

  private Color beanColor = Color.blue;
}

-----------------------

Now for the manifest.mf:

Manifest-Version: 1.0

Name: MyBean.class
Java-Bean: True
Digest-Algorithms: SHA MD5
SHA-Digest: um+FrdYl5a3ZYMn/kXP1XzMgB+c=
MD5-Digest: mThC8cRAoDOAJ+w3Hpp0bQ==

Name: MyBean$1.class
Digest-Algorithms: SHA MD5
SHA-Digest: 6mMdpd/iW98NYJrgnf3bDUCp248=
MD5-Digest: TOfGXLJaAF8FzAOpZERvWA==

Name: icons/my.gif
Digest-Algorithms: SHA MD5
SHA-Digest: bn0lsJKG0RPy8QBUvLFgX4FfHHs=
MD5-Digest: D+tS5orsaKjInUE3W3rT1g==
0
Lewis
Asked:
Lewis
1 Solution
 
russgoldCommented:
To show an icon in the BeanBox (or any bean builder for that matter), you must supply a BeanInfo class which defines the icon. In particular, you should subclass Java.beans.SimpleBeanInfo with a class named MyBeanBeanInfo which overrides the getIcon() method as follows:


public java.awt.Image getIcon(int iconKind) {
  java.awt.Image img = loadImage("icons/my.gif");
  return img;
  }


This assumes, of course, that your icon is the correct size.  You can use the iconKind parameter to select 16x16 icons or 32x32 icons.




0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now