/* The contents of this file are subject to the license and copyright terms
* detailed in the license directory at the root of the source tree (also
* available online at http://fedora-commons.org/license/).
*/
package fedora.swing.mdi;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Point;
import java.beans.PropertyVetoException;
import javax.swing.DefaultDesktopManager;
import javax.swing.JComponent;
import javax.swing.JDesktopPane;
import javax.swing.JInternalFrame;
import javax.swing.JScrollPane;
import javax.swing.JViewport;
/**
* An extension of WDesktopPane that supports often used MDI functionality.
*
* <p>This class also handles setting scroll bars for when windows move too far
* to the left or bottom, providing the MDIDesktopPane is in a ScrollPane.
*
* <p>NOTICE: Portions created by Gerald Nunn are Copyright © Gerald Nunn,
* originally made available at
* http://www.javaworld.com/javaworld/jw-05-2001/jw-0525-mdi.html
*
* @author Gerald Nunn
* @author Chris Wilper
*/
public class MDIDesktopPane
extends JDesktopPane {
private static final long serialVersionUID = 1L;
private static int FRAME_OFFSET = 20;
private final MDIDesktopManager manager;
public MDIDesktopPane() {
manager = new MDIDesktopManager(this);
setDesktopManager(manager);
// setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
setDragMode(JDesktopPane.LIVE_DRAG_MODE);
}
@Override
public void setBounds(int x, int y, int w, int h) {
super.setBounds(x, y, w, h);
checkDesktopSize();
}
public Component add(JInternalFrame frame) {
JInternalFrame[] array = getAllFrames();
Point p;
Component retval = super.add(frame);
checkDesktopSize();
if (array.length > 0) {
p = array[0].getLocation();
p.x = p.x + FRAME_OFFSET;
p.y = p.y + FRAME_OFFSET;
} else {
p = new Point(0, 0);
}
frame.setLocation(p.x, p.y);
moveToFront(frame);
frame.setVisible(true);
try {
frame.setSelected(true);
} catch (PropertyVetoException e) {
frame.toBack();
}
return retval;
}
@Override
public void remove(Component c) {
super.remove(c);
checkDesktopSize();
}
/**
* Cascade all internal frames, un-iconfying any minimized first
*/
public void cascadeFrames() {
restoreFrames();
int x = 0;
int y = 0;
JInternalFrame allFrames[] = getAllFrames();
manager.setNormalSize();
int frameHeight =
getBounds().height - 5 - allFrames.length * FRAME_OFFSET;
int frameWidth =
getBounds().width - 5 - allFrames.length * FRAME_OFFSET;
for (int i = allFrames.length - 1; i >= 0; i--) {
allFrames[i].setSize(frameWidth, frameHeight);
allFrames[i].setLocation(x, y);
x = x + FRAME_OFFSET;
y = y + FRAME_OFFSET;
}
}
/**
* Tile all internal frames, un-iconifying any minimized first
*/
public void tileFrames() {
restoreFrames();
java.awt.Component allFrames[] = getAllFrames();
manager.setNormalSize();
int frameHeight = getBounds().height / allFrames.length;
int y = 0;
for (Component element : allFrames) {
element.setSize(getBounds().width, frameHeight);
element.setLocation(0, y);
y = y + frameHeight;
}
}
public void minimizeFrames() {
JInternalFrame[] array = getAllFrames();
for (JInternalFrame element : array) {
try {
element.setIcon(true);
} catch (PropertyVetoException pve) {
}
}
}
public void restoreFrames() {
JInternalFrame[] array = getAllFrames();
for (JInternalFrame element : array) {
try {
element.setIcon(false);
} catch (PropertyVetoException pve) {
}
}
}
public int deIconifiedFrames() {
int c = 0;
JInternalFrame[] array = getAllFrames();
for (int i = 0; i < array.length; i++) {
if (!array[i].isIcon()) {
c++;
}
}
return c;
}
public int iconifiedFrames() {
int c = 0;
JInternalFrame[] array = getAllFrames();
for (JInternalFrame element : array) {
if (element.isIcon()) {
c++;
}
}
return c;
}
/**
* Sets all component size properties ( maximum, minimum, preferred) to the
* given dimension.
*/
public void setAllSize(Dimension d) {
setMinimumSize(d);
setMaximumSize(d);
setPreferredSize(d);
}
/**
* Sets all component size properties ( maximum, minimum, preferred) to the
* given width and height.
*/
public void setAllSize(int width, int height) {
setAllSize(new Dimension(width, height));
}
private void checkDesktopSize() {
if (getParent() != null && isVisible()) {
manager.resizeDesktop();
}
}
}
/**
* Private class used to replace the standard DesktopManager for JDesktopPane.
* Used to provide scrollbar functionality.
*/
class MDIDesktopManager
extends DefaultDesktopManager {
private static final long serialVersionUID = 1L;
private final MDIDesktopPane desktop;
public MDIDesktopManager(MDIDesktopPane desktop) {
this.desktop = desktop;
}
@Override
public void endResizingFrame(JComponent f) {
super.endResizingFrame(f);
resizeDesktop();
}
@Override
public void endDraggingFrame(JComponent f) {
super.endDraggingFrame(f);
resizeDesktop();
}
public void setNormalSize() {
JScrollPane scrollPane = getScrollPane();
int x = 0;
int y = 0;
Insets scrollInsets = getScrollPaneInsets();
if (scrollPane != null) {
Dimension d = scrollPane.getVisibleRect().getSize();
if (scrollPane.getBorder() != null) {
d
.setSize(d.getWidth() - scrollInsets.left
- scrollInsets.right, d.getHeight()
- scrollInsets.top - scrollInsets.bottom);
}
d.setSize(d.getWidth() - 20, d.getHeight() - 20);
desktop.setAllSize(x, y);
scrollPane.invalidate();
scrollPane.validate();
}
}
private Insets getScrollPaneInsets() {
JScrollPane scrollPane = getScrollPane();
if (scrollPane == null) {
return new Insets(0, 0, 0, 0);
} else {
return getScrollPane().getBorder().getBorderInsets(scrollPane);
}
}
private JScrollPane getScrollPane() {
if (desktop.getParent() instanceof JViewport) {
JViewport viewPort = (JViewport) desktop.getParent();
if (viewPort.getParent() instanceof JScrollPane) {
return (JScrollPane) viewPort.getParent();
}
}
return null;
}
protected void resizeDesktop() {
int x = 0;
int y = 0;
JScrollPane scrollPane = getScrollPane();
Insets scrollInsets = getScrollPaneInsets();
if (scrollPane != null) {
JInternalFrame allFrames[] = desktop.getAllFrames();
for (JInternalFrame element : allFrames) {
if (element.getX() + element.getWidth() > x) {
x = element.getX() + element.getWidth();
}
if (element.getY() + element.getHeight() > y) {
y = element.getY() + element.getHeight();
}
}
Dimension d = scrollPane.getVisibleRect().getSize();
if (scrollPane.getBorder() != null) {
d
.setSize(d.getWidth() - scrollInsets.left
- scrollInsets.right, d.getHeight()
- scrollInsets.top - scrollInsets.bottom);
}
if (x <= d.getWidth()) {
x = (int) d.getWidth() - 20;
}
if (y <= d.getHeight()) {
y = (int) d.getHeight() - 20;
}
desktop.setAllSize(x, y);
scrollPane.invalidate();
scrollPane.validate();
}
}
}