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/*
* Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.apple.laf;
import java.awt.*;
import java.awt.event.MouseEvent;
import javax.swing.*;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicPopupMenuUI;
public class AquaPopupMenuUI extends BasicPopupMenuUI {
public static ComponentUI createUI(final JComponent x) {
return new AquaPopupMenuUI();
}
public boolean isPopupTrigger(final MouseEvent e) {
// Use the awt popup trigger code since this only runs on our OS!
return e.isPopupTrigger();
}
@Override
public void paint(final Graphics g, final JComponent c) {
if (!(g instanceof Graphics2D)) {
super.paint(g, c);
return;
}
if (!(PopupFactory.getSharedInstance() instanceof ScreenPopupFactory)) {
super.paint(g, c);
return;
}
// round off and put back edges in a new Graphics
final Graphics2D g2d = (Graphics2D)g.create();
final Rectangle popupBounds = popupMenu.getBounds(); // NB: origin is still at 0,0
paintRoundRect(g2d, popupBounds);
clipEdges(g2d, popupBounds);
g2d.dispose();
// if any subsequent drawing occurs over these corners, the window is square again
super.paint(g, c);
}
protected void paintRoundRect(final Graphics2D g2d, final Rectangle popupBounds) {
// setup the graphics context to blast alpha for every primitive we draw
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setComposite(AlphaComposite.Clear);
// draw the 3px round-rect line around the outer bounds of the window,
// this gives the appearance of rounded corners
g2d.setStroke(new BasicStroke(3.0f));
g2d.drawRoundRect(-2, -2, popupBounds.width + 3, popupBounds.height + 3, 12, 12);
}
static final int OVERLAP_SLACK = 10;
protected void clipEdges(final Graphics2D g2d, final Rectangle popupBounds) {
final Component invoker = popupMenu.getInvoker();
if (!(invoker instanceof JMenu)) return; // only point corners originating from menu items
final Rectangle invokerBounds = invoker.getBounds();
// only get location on screen when necessary
invokerBounds.setLocation(invoker.getLocationOnScreen());
popupBounds.setLocation(popupMenu.getLocationOnScreen());
final Point invokerCenter = new Point((int)invokerBounds.getCenterX(), (int)invokerBounds.getCenterY());
if (popupBounds.contains(invokerCenter)) {
// invoker is "behind" the popup, no corners should be pointed
return;
}
// blast opaque background over the corners we want to "put back"
g2d.setComposite(AlphaComposite.SrcOver);
g2d.setColor(popupMenu.getBackground());
final Point popupCenter = new Point((int)popupBounds.getCenterX(), (int)popupBounds.getCenterY());
final boolean invokerMidpointAbovePopupMidpoint = invokerCenter.y <= popupCenter.y;
if (invokerBounds.x + invokerBounds.width < popupBounds.x + OVERLAP_SLACK) {
// popup is far right of invoker
if (invokerMidpointAbovePopupMidpoint) {
// point upper left corner, most common case
g2d.fillRect(-2, -2, 8, 8);
return;
}
// point lower left corner
g2d.fillRect(-2, popupBounds.height - 6, 8, 8);
return;
}
if (popupBounds.x + popupBounds.width < invokerBounds.x + OVERLAP_SLACK) {
// popup is far left of invoker
if (invokerMidpointAbovePopupMidpoint) {
// point upper right corner
g2d.fillRect(popupBounds.width - 6, -2, 8, 8);
return;
}
// point lower right corner
g2d.fillRect(popupBounds.width - 6, popupBounds.height - 6, 8, 8);
return;
}
// popup is neither "far right" or "far left" of it's invoker
if (invokerBounds.y + invokerBounds.height < popupBounds.y + OVERLAP_SLACK) {
// popup is "middle" below it's invoker,
// this is probably the "connected" case where both upper corners should touch
g2d.fillRect(-2, -2, popupBounds.width + 4, 8);
return;
}
// if none of these cases match...don't make any corners pointed
}
}
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