diff options
author | Kenneth Russel <[email protected]> | 2005-10-24 19:21:28 +0000 |
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committer | Kenneth Russel <[email protected]> | 2005-10-24 19:21:28 +0000 |
commit | 6873f65775af236ed270fcbd08661f5b53ba3598 (patch) | |
tree | 6fcefdc3a9429d7d3071b1464c11d40fa7bc3ab9 /src/demos/xtrans/OffscreenDesktopPane.java | |
parent | 538be101e7bce7788c82e1b254a66deb5d35bb56 (diff) |
Merged JSR-231 branch on to the main JOGL trunk. The main trunk now
contains the evolving JSR-231 Reference Implementation and the JSR-231
branch is permanently closed.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/../svn-server-sync/jogl-demos/trunk@144 3298f667-5e0e-4b4a-8ed4-a3559d26a5f4
Diffstat (limited to 'src/demos/xtrans/OffscreenDesktopPane.java')
-rwxr-xr-x | src/demos/xtrans/OffscreenDesktopPane.java | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/demos/xtrans/OffscreenDesktopPane.java b/src/demos/xtrans/OffscreenDesktopPane.java new file mode 100755 index 0000000..7800666 --- /dev/null +++ b/src/demos/xtrans/OffscreenDesktopPane.java @@ -0,0 +1,189 @@ +package demos.xtrans; + +import java.awt.*; +import java.awt.geom.*; +import java.util.*; +import javax.swing.*; + +// Internal JOGL API references +import com.sun.opengl.impl.Debug; + +/** A subclass of JDesktopPane which performs all of the rendering of + its child components into an off-screen buffer. Provides access to + this back buffer so subclasses can determine how to draw the + contents of the child windows to the screen. */ + +public class OffscreenDesktopPane extends JDesktopPane { + // + // Debugging functionality only + // + private static final boolean DEBUG = Debug.debug("OffscreenDesktopPane"); + private static final Color[] colors = { + Color.LIGHT_GRAY, + Color.CYAN, + Color.PINK, + Color.GRAY, + Color.MAGENTA, + Color.BLUE, + Color.ORANGE, + Color.DARK_GRAY, + Color.RED, + Color.YELLOW + }; + private int colorIdx; + + private Color getNextColor() { + Color c = colors[colorIdx]; + colorIdx = (colorIdx + 1) % colors.length; + return c; + } + + private Map/*<Component, Color>*/ componentColorMap; + + /** Constructs a new OffscreenDesktopPane. */ + public OffscreenDesktopPane() { + super(); + if (DEBUG) { + componentColorMap = new WeakHashMap(); + } + // Only use an OffscreenDesktopManager instance directly if we + // have not been subclassed + if (getClass() == OffscreenDesktopPane.class) { + setDesktopManager(new OffscreenDesktopManager()); + } + } + + /** Overrides superclass's addImpl to insert an + OffscreenComponentWrapper between the added component and this + one. The wrapper component produces Graphics objects used when + children repaint themselves directly. */ + protected void addImpl(Component c, Object constraints, int index) { + if (c instanceof OffscreenComponentWrapper) { + throw new RuntimeException("Should not add OffscreenComponentWrappers directly"); + } + OffscreenComponentWrapper wrapper = new OffscreenComponentWrapper(c); + // Note: this is essential in order to keep mouse events + // propagating correctly down the hierarchy + wrapper.setBounds(getBounds()); + OffscreenDesktopManager.switchDoubleBuffering(wrapper, false); + super.addImpl(wrapper, constraints, index); + if (DEBUG) { + componentColorMap.put(c, getNextColor()); + } + getOffscreenDesktopManager().setNeedsReLayout(); + repaint(); + } + + // In order to hide the presence of the OffscreenComponentWrapper a + // little more, we override remove to make it look like we can + // simply pass in the JInternalFrames inside the + // OffscreenComponentWrappers. There are some situations where we + // can't hide the presence of the OffscreenComponentWrapper (such as + // when calling getParent() of the JInternalFrame) so to avoid + // incorrect behavior of the rest of the toolkit we don't override + // getComponent() to skip the OffscreenComponentWrappers. + + /** Removes the component at the given index. */ + public void remove(int index) { + Component c = getComponent(index); + super.remove(index); + OffscreenDesktopManager.switchDoubleBuffering(c, true); + } + + /** Removes the specified component from this + OffscreenDesktopPane. This method accepts either the components + added by the application (which are not direct children of this + one) or the OffscreenComponentWrappers added implicitly by the + add() method. */ + public void remove(Component comp) { + comp = getWrapper(comp); + if (comp == null) { + // This component must not be one of our children + return; + } + super.remove(comp); + OffscreenDesktopManager.switchDoubleBuffering(comp, true); + } + + public void reshape(int x, int y, int w, int h) { + super.reshape(x, y, w, h); + Rectangle rect = new Rectangle(x, y, w, h); + Component[] cs = getComponents(); + for (int i = 0; i < cs.length; i++) { + // Note: this is essential in order to keep mouse events + // propagating correctly down the hierarchy + ((OffscreenComponentWrapper) cs[i]).setBounds(rect); + } + } + + /** Overridden from JLayeredPane for convenience when manipulating + child components. Accepts either the component added by the + application or the OffscreenComponentWrapper added implicitly by + the add() method. */ + public void setPosition(Component c, int position) { + super.setPosition(getWrapper(c), position); + } + + /** Paints all children of this OffscreenDesktopPane to the internal + off-screen buffer. Does no painting to the passed Graphics + object; this is the responsibility of subclasses. */ + protected void paintChildren(Graphics g) { + // Update desktop manager's offscreen buffer if necessary + getOffscreenDesktopManager().updateOffscreenBuffer(this); + + if (DEBUG) { + // Subclasses will need to override this behavior anyway, so + // only enable an on-screen representation if debugging is + // enabled. For now, simply paint colored rectangles indicating + // the on-screen locations of the windows. + final Component[] components = getRealChildComponents(); + int compCount = components.length; + for (int i = compCount - 1; i >= 0; i--) { + Component c = components[i]; + Rectangle r = c.getBounds(); + Color col = (Color) componentColorMap.get(c); + g.setColor(col); + g.fillRect(r.x, r.y, r.width, r.height); + } + } + } + + /** Fetches the real child components of this OffscreenDesktopPane, + skipping all OffscreenComponentWrappers implicitly added. */ + protected Component[] getRealChildComponents() { + Component[] cs = getComponents(); + for (int i = 0; i < cs.length; i++) { + cs[i] = ((OffscreenComponentWrapper) cs[i]).getChild(); + } + return cs; + } + + /** Returns the OffscreenDesktopManager associated with this + pane. */ + public OffscreenDesktopManager getOffscreenDesktopManager() { + return (OffscreenDesktopManager) getDesktopManager(); + } + + /** Returns the real child component of this OffscreenDesktopPane, + skipping the OffscreenComponentWrapper implicitly added. */ + protected static Component getRealComponent(Component c) { + if (c instanceof OffscreenComponentWrapper) { + return ((OffscreenComponentWrapper) c).getChild(); + } + return c; + } + + /** Returns the OffscreenComponentWrapper corresponding to the given + child component, or the passed component if it is already the + wrapper. */ + protected static Component getWrapper(Component c) { + if (c instanceof OffscreenComponentWrapper) { + return c; + } + Component parent = c.getParent(); + if (parent instanceof OffscreenComponentWrapper) { + return parent; + } + return null; + } +} |