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Java Source | 1998-06-30 | 14.7 KB | 501 lines |
- /*
- * @(#)RepaintManager.java 1.24 98/06/02
- *
- * Copyright 1997, 1998 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
- package com.sun.java.swing;
-
-
- import java.awt.*;
- import java.awt.event.*;
- import java.util.*;
- import java.applet.*;
-
-
- /**
- * @version 1.24 06/02/98
- * @author Arnaud Weber
- */
- public class RepaintManager
- {
- Hashtable dirtyComponents;
- Vector invalidComponents;
- boolean doubleBufferingEnabled = true;
- Image doubleBuffer;
- Dimension doubleBufferMaxSize;
-
- private static final Object repaintManagerKey = RepaintManager.class;
-
- /**
- * Return the RepaintManager for the calling thread.
- */
- public static RepaintManager currentManager(Component c) {
- RepaintManager result = (RepaintManager) SwingUtilities.appContextGet(repaintManagerKey);
- if(result == null) {
- result = new RepaintManager();
- SwingUtilities.appContextPut(repaintManagerKey, result);
- }
- return result;
- }
-
- /**
- * @return currentManager((Component)<b>c</b>)
- */
- public static RepaintManager currentManager(JComponent c) {
- return currentManager((Component)c);
- }
-
-
- /** Set the RepaintManager that should be used for the calling
- * thread. <b>aRepaintManager</b> will become the current RepaintManager
- * for the calling thread's thread group.
- */
- public static void setCurrentManager(RepaintManager aRepaintManager) {
- if (aRepaintManager != null) {
- SwingUtilities.appContextPut(repaintManagerKey, aRepaintManager);
- } else {
- SwingUtilities.appContextRemove(repaintManagerKey);
- }
- }
-
- /** Create a new RepaintManager instance. You rarely call this constructor.
- * directly. To get the default RepaintManager, use
- * RepaintManager.currentManager(JComponent) (normally "this").
- */
- public RepaintManager() {
- dirtyComponents = new Hashtable();
- doubleBufferMaxSize = Toolkit.getDefaultToolkit().getScreenSize();
- }
-
-
- /**
- * Mark the component as in need of layout and queue a runnable
- * for the event dispatching thread that will validate the components
- * first isValidateRoot() ancestor.
- *
- * @see JComponent#isValidateRoot
- * @see #removeInvalidComponent
- */
- public synchronized void addInvalidComponent(JComponent invalidComponent)
- {
- Component validateRoot = null;
-
- /* Find the first JComponent ancestor of this component whose
- * isValidateRoot() method returns true.
- */
- for(Component c = invalidComponent; c != null; c = c.getParent()) {
- if ((c instanceof CellRendererPane) || (c.getPeer() == null)) {
- return;
- }
- if ((c instanceof JComponent) && (((JComponent)c).isValidateRoot())) {
- validateRoot = c;
- break;
- }
- }
-
- /* There's no validateRoot to apply validate to, so we're done.
- */
- if (validateRoot == null) {
- return;
- }
-
- /* If the validateRoot and all of its ancestors aren't visible
- * then we don't do anything. While we're walking up the tree
- * we find the root Window or Applet.
- */
- Component root = null;
-
- for(Component c = validateRoot; c != null; c = c.getParent()) {
- if (!c.isVisible() || (c.getPeer() == null)) {
- return;
- }
- if ((c instanceof Window) || (c instanceof Applet)) {
- root = c;
- break;
- }
- }
-
- if (root == null) {
- return;
- }
-
- /* Lazily create the invalidateComponents vector and add the
- * validateRoot if it's not there already. If this validateRoot
- * is already in the vector, we're done.
- */
- if (invalidComponents == null) {
- invalidComponents = new Vector();
- }
- else {
- int n = invalidComponents.size();
- for(int i = 0; i < n; i++) {
- if(validateRoot == (Component)(invalidComponents.elementAt(i))) {
- return;
- }
- }
- }
- invalidComponents.addElement(validateRoot);
-
- /* Queues a Runnable that calls RepaintManager.validateInvalidComponents()
- * and RepaintManager.paintDirtyRegions() with SwingUtilities.invokeLater().
- */
- SystemEventQueueUtilities.queueComponentWorkRequest(root);
- }
-
-
- /**
- * Remove a component from the list of invalid components.
- *
- * @see #addInvalidComponent
- */
- public synchronized void removeInvalidComponent(JComponent component) {
- if(invalidComponents != null) {
- int index = invalidComponents.indexOf(component);
- if(index != -1) {
- invalidComponents.removeElementAt(index);
- }
- }
- }
-
-
- /**
- * Add a component in the list of components that should be refreshed.
- * If <i>c</i> already has a dirty region, the rectangle <i>(x,y,w,h)</i>
- * will be unioned with the region that should be redrawn.
- *
- * @see JComponent#repaint
- */
- public synchronized void addDirtyRegion(JComponent c, int x, int y, int w, int h)
- {
- /* Special cases we don't have to bother with.
- */
- if ((w <= 0) || (h <= 0) || (c == null)) {
- return;
- }
-
- if ((c.getWidth() <= 0) || (c.getHeight() <= 0)) {
- return;
- }
-
- /* Make sure that c and all it ancestors (up to an Applet or
- * Window) are visible. This loop has the same effect as
- * checking c.isShowing() (and note that it's still possible
- * that c is completely obscured by an opaque ancestor in
- * the specified rectangle).
- */
- Component root = null;
-
- for (Container p = c; p != null; p = p.getParent()) {
- if (!p.isVisible() || (p.getPeer() == null)) {
- return;
- }
- if ((p instanceof Window) || (p instanceof Applet)) {
- root = p;
- break;
- }
- }
-
- /* Lazily create the dirtyComponents Hashtable and add
- * x,y,w,h to the entry for c.
- */
- if(dirtyComponents == null) {
- dirtyComponents = new Hashtable();
- dirtyComponents.put(c, new Rectangle(x, y, w, h));
- }
- else {
- Rectangle r = (Rectangle)dirtyComponents.get(c);
- if (r == null) {
- dirtyComponents.put(c, new Rectangle(x, y, w, h));
- }
- else {
- SwingUtilities.computeUnion(x, y, w, h, r);
- }
- }
-
- /* Queues a Runnable that calls validateInvalidComponents() and
- * rm.paintDirtyRegions() with SwingUtilities.invokeLater().
- */
- SystemEventQueueUtilities.queueComponentWorkRequest(root);
- }
-
-
- /** Return the current dirty region for a component.
- * Return an empty rectangle if the component is not
- * dirty.
- */
- public Rectangle getDirtyRegion(JComponent aComponent) {
- Rectangle r = null;
- synchronized(this) {
- if(dirtyComponents != null)
- r = (Rectangle)dirtyComponents.get(aComponent);
- }
- if(r == null)
- return new Rectangle(0,0,0,0);
- else
- return new Rectangle(r);
- }
-
- /** Mark a component completely dirty. <b>aComponent</b> will be
- * completely painted during the next paintDirtyRegions() call.
- */
- public void markCompletelyDirty(JComponent aComponent) {
- addDirtyRegion(aComponent,0,0,Integer.MAX_VALUE,Integer.MAX_VALUE);
- }
-
- /** Mark a component completely clean. <b>aComponent</b> will not
- * get painted during the next paintDirtyRegions() call
- */
- public void markCompletelyClean(JComponent aComponent) {
- synchronized(this) {
- if(dirtyComponents != null)
- dirtyComponents.remove(aComponent);
- }
- }
-
- /** Convenience that returns true if <b>aComponent</b> will be completely
- * painted during the next paintDirtyRegions(). If computing dirty regions is
- * expensive for your component, use this method and avoid computing dirty region
- * if it return true.
- */
- public boolean isCompletelyDirty(JComponent aComponent) {
- Rectangle r;
-
- r = getDirtyRegion(aComponent);
- if(r.width == Integer.MAX_VALUE &&
- r.height == Integer.MAX_VALUE)
- return true;
- else
- return false;
- }
-
-
- /**
- * Validate all of the components that have been marked invalid.
- * @see #addInvalidComponent
- */
- public void validateInvalidComponents() {
- Vector ic;
- synchronized(this) {
- if(invalidComponents == null) {
- return;
- }
- ic = invalidComponents;
- invalidComponents = null;
- }
- int n = ic.size();
- for(int i = 0; i < n; i++) {
- ((Component)ic.elementAt(i)).validate();
- }
- }
-
-
- /**
- * Paint all of the components that have been marked dirty.
- *
- * @see #addDirtyRegion
- */
- public void paintDirtyRegions() {
- int i, count;
- Vector roots;
- JComponent dirtyComponent;
-
- Hashtable tmpDirtyComponents;
- synchronized(this) {
- if(dirtyComponents == null) {
- return;
- }
- tmpDirtyComponents = dirtyComponents;
- dirtyComponents = null;
- }
-
- count = tmpDirtyComponents.size();
- if (count == 0) {
- return;
- }
-
- Rectangle rect;
- Rectangle localBounds;
- Enumeration keys;
-
- roots = new Vector(count);
- keys = tmpDirtyComponents.keys();
-
- while(keys.hasMoreElements()) {
- dirtyComponent = (JComponent) keys.nextElement();
- collectDirtyComponents(tmpDirtyComponents, dirtyComponent, roots);
- }
-
- count = roots.size();
- // System.out.println("roots size is " + count);
- for(i=0 ; i < count ; i++) {
- dirtyComponent = (JComponent) roots.elementAt(i);
- rect = (Rectangle) tmpDirtyComponents.get(dirtyComponent);
- // System.out.println("Should refresh :" + rect);
- localBounds = dirtyComponent.getBounds();
- localBounds.x = localBounds.y = 0;
- rect = rect.intersection(localBounds);
- // System.out.println("** paint of " + dirtyComponent + rect);
- dirtyComponent.paintImmediately(rect.x,rect.y,rect.width,rect.height);
- }
- }
-
-
-
- void collectDirtyComponents(Hashtable dirtyComponents,
- JComponent dirtyComponent,
- Vector roots) {
- int dx, dy, rootDx, rootDy;
- Component component, rootDirtyComponent,parent;
- Rectangle tmp;
- Rectangle cBounds;
- boolean opaqueAncestorFound = false;
-
- // Find the highest parent which is dirty. When we get out of this
- // rootDx and rootDy will contain the translation from the
- // rootDirtyComponent's coordinate system to the coordinates of the
- // original dirty component. The tmp Rect is also used to compute the
- // visible portion of the dirtyRect.
-
- component = rootDirtyComponent = dirtyComponent;
-
- cBounds = dirtyComponent._bounds;
-
- dx = rootDx = 0;
- dy = rootDy = 0;
- tmp = new Rectangle((Rectangle) dirtyComponents.get(dirtyComponent));
-
- // System.out.println("Collect dirty component for bound " + tmp +
- // "component bounds is " + cBounds);;
- SwingUtilities.computeIntersection(0,0,cBounds.width,cBounds.height,tmp);
-
- if (tmp.isEmpty()) {
- // System.out.println("Empty 1");
- return;
- }
-
- if(dirtyComponent.isOpaque())
- opaqueAncestorFound = true;
-
- for(;;) {
- parent = component.getParent();
- if(parent == null)
- break;
-
- if(!(parent instanceof JComponent))
- break;
-
- component = parent;
-
- if(((JComponent)component).isOpaque())
- opaqueAncestorFound = true;
-
- dx += cBounds.x;
- dy += cBounds.y;
- tmp.setLocation(tmp.x + cBounds.x,
- tmp.y + cBounds.y);
-
- cBounds = ((JComponent)component)._bounds;
- tmp = SwingUtilities.computeIntersection(0,0,cBounds.width,cBounds.height,tmp);
-
- if (tmp.isEmpty()) {
- // System.out.println("Empty 2");
- return;
- }
-
- if (dirtyComponents.get(component) != null) {
- rootDirtyComponent = component;
- rootDx = dx;
- rootDy = dy;
- }
- }
-
- if (dirtyComponent != rootDirtyComponent) {
- Rectangle r;
- tmp.setLocation(tmp.x + rootDx - dx,
- tmp.y + rootDy - dy);
- r = (Rectangle)dirtyComponents.get(rootDirtyComponent);
- SwingUtilities.computeUnion(tmp.x,tmp.y,tmp.width,tmp.height,r);
- }
-
- // If we haven't seen this root before, then we need to add it to the
- // list of root dirty Views.
-
- if (!roots.contains(rootDirtyComponent))
- roots.addElement(rootDirtyComponent);
- }
-
-
- public synchronized String toString() {
- StringBuffer sb = new StringBuffer();
- if(dirtyComponents != null)
- sb.append("" + dirtyComponents);
- return sb.toString();
- }
-
- /** Return the offscreen buffer that should be used as a double buffer with the component <code>c</code>
- * By default there is a double buffer per RepaintManager.
- * The buffer might be smaller than <code>(proposedWidth,proposedHeight)</code>
- * This happens when the maximum double buffer size as been set for the receiving
- * repaint manager.
- */
- public Image getOffscreenBuffer(Component c,int proposedWidth,int proposedHeight) {
- Image result;
- int width,height;
-
- if(proposedWidth > doubleBufferMaxSize.width)
- width = doubleBufferMaxSize.width;
- else
- width = proposedWidth;
-
- if(proposedHeight > doubleBufferMaxSize.height)
- height =doubleBufferMaxSize.height;
- else
- height = proposedHeight;
-
- if(doubleBuffer != null) {
- if(doubleBuffer.getWidth(null) < width ||
- doubleBuffer.getHeight(null) < height)
- doubleBuffer = null;
- }
-
- if(doubleBuffer == null) {
- doubleBuffer = c.createImage(width,height);
- // System.out.println("Creating offscreen buffer " + new Dimension(width,height));
- }
- return doubleBuffer;
- }
-
- /** Set the maximum double buffer size. **/
- public void setDoubleBufferMaximumSize(Dimension d) {
- doubleBufferMaxSize = d;
- if(doubleBuffer != null) {
- if(doubleBuffer.getWidth(null) > d.width ||
- doubleBuffer.getHeight(null) > d.height)
- doubleBuffer = null;
- }
- }
-
- public Dimension getDoubleBufferMaximumSize() {
- return doubleBufferMaxSize;
- }
-
- public void setDoubleBufferingEnabled(boolean aFlag) {
- doubleBufferingEnabled = aFlag;
- if(!doubleBufferingEnabled) {
- doubleBuffer = null;
- }
- }
-
- public boolean isDoubleBufferingEnabled() {
- return doubleBufferingEnabled;
- }
- }
-