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/*
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* Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package sun.awt;
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import java.awt.*;
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import java.util.logging.*;
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public abstract class SunGraphicsCallback {
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public static final int HEAVYWEIGHTS = 0x1;
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public static final int LIGHTWEIGHTS = 0x2;
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public static final int TWO_PASSES = 0x4;
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private static final Logger log = Logger.getLogger("sun.awt.SunGraphicsCallback");
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public abstract void run(Component comp, Graphics cg);
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protected void constrainGraphics(Graphics g, Rectangle bounds) {
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if (g instanceof ConstrainableGraphics) {
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((ConstrainableGraphics)g).constrain(bounds.x, bounds.y, bounds.width, bounds.height);
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} else {
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g.translate(bounds.x, bounds.y);
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}
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g.clipRect(0, 0, bounds.width, bounds.height);
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}
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public final void runOneComponent(Component comp, Rectangle bounds,
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Graphics g, Shape clip,
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int weightFlags) {
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if (comp == null || comp.getPeer() == null || !comp.isVisible()) {
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return;
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}
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boolean lightweight = comp.isLightweight();
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if ((lightweight && (weightFlags & LIGHTWEIGHTS) == 0) ||
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(!lightweight && (weightFlags & HEAVYWEIGHTS) == 0)) {
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return;
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}
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if (bounds == null) {
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bounds = comp.getBounds();
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}
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if (clip == null || clip.intersects(bounds)) {
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Graphics cg = g.create();
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try {
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constrainGraphics(cg, bounds);
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cg.setFont(comp.getFont());
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cg.setColor(comp.getForeground());
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if (cg instanceof Graphics2D) {
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((Graphics2D)cg).setBackground(comp.getBackground());
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} else if (cg instanceof Graphics2Delegate) {
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((Graphics2Delegate)cg).setBackground(
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comp.getBackground());
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}
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run(comp, cg);
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} finally {
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cg.dispose();
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}
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}
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}
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public final void runComponents(Component[] comps, Graphics g,
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int weightFlags) {
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int ncomponents = comps.length;
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Shape clip = g.getClip();
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if (log.isLoggable(Level.FINER) && (clip != null)) {
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Rectangle newrect = clip.getBounds();
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log.log(Level.FINER, "x = " + newrect.x + ", y = " + newrect.y +
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", width = " + newrect.width +
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", height = " + newrect.height);
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}
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// A seriously sad hack--
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// Lightweight components always paint behind peered components,
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// even if they are at the top of the Z order. We emulate this
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// behavior by making two printing passes: the first for lightweights;
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// the second for heavyweights.
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//
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// ToDo(dpm): Either build a list of heavyweights during the
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// lightweight pass, or redesign the components array to keep
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// lightweights and heavyweights separate.
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if ((weightFlags & TWO_PASSES) != 0) {
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for (int i = ncomponents - 1; i >= 0; i--) {
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runOneComponent(comps[i], null, g, clip, LIGHTWEIGHTS);
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}
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for (int i = ncomponents - 1; i >= 0; i--) {
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runOneComponent(comps[i], null, g, clip, HEAVYWEIGHTS);
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}
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} else {
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for (int i = ncomponents - 1; i >= 0; i--) {
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runOneComponent(comps[i], null, g, clip, weightFlags);
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}
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}
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}
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public static final class PaintHeavyweightComponentsCallback
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extends SunGraphicsCallback
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{
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private static PaintHeavyweightComponentsCallback instance =
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new PaintHeavyweightComponentsCallback();
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private PaintHeavyweightComponentsCallback() {}
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public void run(Component comp, Graphics cg) {
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if (!comp.isLightweight()) {
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comp.paintAll(cg);
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} else if (comp instanceof Container) {
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runComponents(((Container)comp).getComponents(), cg,
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LIGHTWEIGHTS | HEAVYWEIGHTS);
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}
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}
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public static PaintHeavyweightComponentsCallback getInstance() {
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return instance;
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}
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}
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public static final class PrintHeavyweightComponentsCallback
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extends SunGraphicsCallback
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{
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private static PrintHeavyweightComponentsCallback instance =
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new PrintHeavyweightComponentsCallback();
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private PrintHeavyweightComponentsCallback() {}
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public void run(Component comp, Graphics cg) {
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if (!comp.isLightweight()) {
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comp.printAll(cg);
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} else if (comp instanceof Container) {
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runComponents(((Container)comp).getComponents(), cg,
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LIGHTWEIGHTS | HEAVYWEIGHTS);
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}
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}
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public static PrintHeavyweightComponentsCallback getInstance() {
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return instance;
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}
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}
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}
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