jannebuttontest.java

java编程的一些Applets例子。值得深入研究一下。

/** 
 * Simple applet to test JanneButton class
 */
import java.awt.*;
import java.awt.image.*;
import java.applet.Applet;

public class JanneButtonTest extends Applet {
   public void init() {
      // test setting of background
      setBackground(new Color(0xEED5B7));

      // get the images
      Image joe = getImage(getDocumentBase(), "images/joe.gif");
      Image left = getImage(getDocumentBase(), "images/left.gif");

      // create grid bag
      GridBagLayout gridbag = new GridBagLayout();
      GridBagConstraints c = new GridBagConstraints();
      setLayout(gridbag);
      //c.gridwidth = 2;
      Insets insets = new Insets(2, 2, 4, 2);
      c.insets = insets;
      //c.ipady = 4;
      
      // create a few buttons
      addButton(gridbag, c, "String Button:",
		null, "With a Label", false);
      addButton(gridbag, c, "Image Button:",
		left, "left", false);
      addButton(gridbag, c, "Image Button, with String:",
		left, "Left", true);
      addButton(gridbag, c, "A Larger Image Button:",
		joe, "joe", false);
      show();
   }

   public void addButton(GridBagLayout gridbag, GridBagConstraints c,
			 String labelStr, Image image, String buttonStr,
			 boolean showLabel)
   {
      Label label = new Label(labelStr);
      JanneButton button;
      if (image != null)
	 button = new JanneButton(image, buttonStr, false, showLabel);
      else
	 button = new JanneButton(buttonStr);
      c.gridwidth = 1;
      c.anchor = GridBagConstraints.EAST;
      gridbag.setConstraints(label, c);
      add(label);
      c.anchor = GridBagConstraints.CENTER;
      c.gridwidth = GridBagConstraints.REMAINDER;
      gridbag.setConstraints(button, c);
      add(button);
   }
   
}