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Java > Open Source Codes > org > webdocwf > util > loader > wizard > SampleDesktopMgr


1
2 package org.webdocwf.util.loader.wizard;
3
4 import javax.swing.*;
5 import java.awt.*;
6
7 public class SampleDesktopMgr extends DefaultDesktopManager {
8
9   // This is called anytime a frame is moved. This
10 // implementation keeps the frame from leaving the desktop.
11 public void dragFrame(JComponent f, int x, int y) {
12     if (f instanceof JInternalFrame) { // Deal only w/internal frames
13 JInternalFrame frame = (JInternalFrame)f;
14       JDesktopPane desk = frame.getDesktopPane();
15       Dimension d = desk.getSize();
16
17       // Nothing all that fancy below, just figuring out how to adjust
18 // to keep the frame on the desktop.
19 if (x < 0) { // too far left?
20 x = 0; // flush against the left side
21 }
22       else {
23         if (x + frame.getWidth() > d.width) { // too far right?
24 x = d.width - frame.getWidth(); // flush against right side
25 }
26       }
27       if (y < 0) { // too high?
28 y=0; // flush against the top
29 }
30       else {
31         if (y + frame.getHeight() > d.height) { // too low?
32 y = d.height - frame.getHeight(); // flush against the bottom
33 }
34       }
35     }
36
37     // Pass along the (possibly cropped) values to the normal drag handler.
38 super.dragFrame(f, x, y);
39   }
40 }
41
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