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/*
* @(#)JidePopupMenu.java
*
* Copyright 2002 JIDE Software. All rights reserved.
*/
package com.jidesoft.swing;
import com.jidesoft.plaf.LookAndFeelFactory;
import com.jidesoft.plaf.UIDefaultsLookup;
import com.jidesoft.utils.PortingUtils;
import javax.swing.*;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
import javax.swing.plaf.PopupMenuUI;
import java.awt.*;
/**
* This component extends JPopupMenu and adds a method to display the menu inside the screen even if the mouse pointer
* is near the edge of the screen.
* <p/>
* It also puts the menu items into a scroll pane. When there are too many menu items that can't fit into one screen,
* the scroll pane will scroll up and down so that you can still get to all menu items.
*/
public class JidePopupMenu extends JPopupMenu implements Scrollable {
private static final String uiClassID = "JidePopupMenuUI";
private static final String uiClassIDAlternative = "PopupMenuUI";
private boolean _useLightWeightPopup;
private int _visibleMenuItemCount;
/**
* Constructs a <code>JPopupMenu</code> without an "invoker".
*/
public JidePopupMenu() {
setupPopupMenu();
}
/**
* Constructs a <code>JPopupMenu</code> with the specified title.
*
* @param label the string that a UI may use to display as a title for the popup menu.
*/
public JidePopupMenu(String label) {
super(label);
setupPopupMenu();
}
@Override
public String getUIClassID() {
return UIDefaultsLookup.getBoolean("JidePopupMenu.uiExtensionDisabled") ? uiClassIDAlternative : uiClassID;
}
private void setupPopupMenu() {
addPopupMenuListener(new ToolTipSwitchPopupMenuListener());
}
@Override
public void updateUI() {
if (UIDefaultsLookup.get(getUIClassID()) == null) {
LookAndFeelFactory.installJideExtension();
}
setUI((PopupMenuUI) UIManager.getUI(this));
}
/**
* Displays the PopUpMenu at a specified position.
*
* @param invoker the component that triggers the event
* @param x mouse X position on screen
* @param y mouse Y position on screen
*/
@Override
public void show(Component invoker, int x, int y) {
Point p = getPopupMenuOrigin(invoker, x, y);
super.show(invoker, p.x, p.y);
}
/**
* Figures out the sizes needed to calculate the menu position.
*
* @param invoker the component that triggers the event
* @param x mouse X position on screen
* @param y mouse Y position on screen
* @return new position
*/
protected Point getPopupMenuOrigin(Component invoker, int x, int y) {
Dimension size = getPreferredScrollableViewportSize();
Point p = new Point(x, y);
SwingUtilities.convertPointToScreen(p, invoker);
Rectangle bounds = PortingUtils.ensureOnScreen(new Rectangle(p, size));
p = bounds.getLocation();
SwingUtilities.convertPointFromScreen(p, invoker);
return p;
}
@Override
public void setLocation(int x, int y) {
// TODO: this is really a hack. Two classes will call this method. One is when the JPopupMenu is show. The other
if (isVisible() && y <= 0) {
move(x, y); // cannot call setLocation because it will be recursive call. So call deprecated move in order to bypass this.
}
else {
super.setLocation(x, y);
}
}
public Dimension getPreferredScrollableViewportSize() {
Dimension size = getPreferredSize();
Dimension screenSize = PortingUtils.getLocalScreenSize(this);
Container container = SwingUtilities.getAncestorOfClass(SimpleScrollPane.class, this);
if (container instanceof SimpleScrollPane) {
SimpleScrollPane scrollPane = (SimpleScrollPane) container;
int height = screenSize.height;
// limit it to the height determined by the visible menu item count
if (getVisibleMenuItemCount() > 0) {
int totalHeight = getVisibleMenuItemCount() * getScrollableUnitIncrement(null, 0, 0);
if (height > totalHeight) {
height = totalHeight;
}
}
size.height = Math.min(size.height, height - scrollPane.getScrollUpButton().getPreferredSize().height - scrollPane.getScrollDownButton().getPreferredSize().height);
}
return size;
}
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
return new JMenuItem("ABC").getPreferredSize().height;
}
public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
return new JMenuItem("ABC").getPreferredSize().height * 5;
}
public boolean getScrollableTracksViewportWidth() {
return true;
}
public boolean getScrollableTracksViewportHeight() {
return false;
}
private class ToolTipSwitchPopupMenuListener implements PopupMenuListener {
public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
_useLightWeightPopup = ToolTipManager.sharedInstance().isLightWeightPopupEnabled();
ToolTipManager.sharedInstance().setLightWeightPopupEnabled(false);
}
public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
ToolTipManager.sharedInstance().setLightWeightPopupEnabled(_useLightWeightPopup);
}
public void popupMenuCanceled(PopupMenuEvent e) {
ToolTipManager.sharedInstance().setLightWeightPopupEnabled(_useLightWeightPopup);
}
}
/**
* Gets the maximum visible menu item count.
*
* @return the maximum visible menu item count.
* @since 3.6.2
*/
public int getVisibleMenuItemCount() {
return _visibleMenuItemCount;
}
/**
* Sets the visible menu item count. It will control the popup menu height along with the screen size, whichever is
* smaller.
*
* @param visibleMenuItemCount the maximum menu item count to be shown. -1 means no limit.
* @since 3.6.2
*/
public void setVisibleMenuItemCount(int visibleMenuItemCount) {
if (_visibleMenuItemCount != visibleMenuItemCount) {
int oldValue = _visibleMenuItemCount;
_visibleMenuItemCount = visibleMenuItemCount;
firePropertyChange("visibleMenuCount", oldValue, visibleMenuItemCount);
}
}
}
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