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Container.java (LightweightDispatcher): Implement.

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2004-01-07  Graydon Hoare  <graydon@redhat.com>

	* java/awt/Container.java (LightweightDispatcher): Implement.
	(visitChild): Reuse graphics object.
	(dispatchEventImpl): Optionally dispatch to lightweight.
	(addNotifyContainerChildren): Build LightweightDispatcher.

From-SVN: r75531
This commit is contained in:
Graydon Hoare 2004-01-08 03:52:52 +00:00 • committed by Graydon Hoare
parent 72827ed7fc
commit fbea267fef
2 changed files with 134 additions and 33 deletions
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7
libjava/ChangeLog
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@ -1,3 +1,10 @@
2004-01-07 Graydon Hoare <graydon@redhat.com>
* java/awt/Container.java (LightweightDispatcher): Implement.
(visitChild): Reuse graphics object.
(dispatchEventImpl): Optionally dispatch to lightweight.
(addNotifyContainerChildren): Build LightweightDispatcher.
2004-01-07 David Jee <djee@redhat.com>
* java/awt/Container.java

160
libjava/java/awt/Container.java
View file

@ -41,6 +41,7 @@ import java.awt.event.AWTEventListener;
import java.awt.event.ContainerEvent;
import java.awt.event.ContainerListener;
import java.awt.event.MouseEvent;
import java.awt.event.KeyEvent;
import java.awt.peer.ContainerPeer;
import java.awt.peer.LightweightPeer;
import java.beans.PropertyChangeListener;
@ -1229,26 +1230,39 @@ public class Container extends Component
Component comp)
{
Rectangle bounds = comp.getBounds();
Rectangle clip = gfx.getClipBounds().intersection(bounds);
Rectangle oldClip = gfx.getClipBounds();
if (oldClip == null)
oldClip = bounds;
Rectangle clip = oldClip.intersection(bounds);
if (clip.isEmpty()) return;
Graphics gfx2 = gfx.create();
boolean clipped = false;
boolean translated = false;
try
{
gfx2.setClip(clip.x, clip.y, clip.width, clip.height);
gfx2.translate(bounds.x, bounds.y);
visitor.visit(comp, gfx2);
gfx.setClip(clip.x, clip.y, clip.width, clip.height);
clipped = true;
gfx.translate(bounds.x, bounds.y);
translated = true;
visitor.visit(comp, gfx);
}
finally
{
gfx2.dispose ();
if (translated)
gfx.translate (-bounds.x, -bounds.y);
if (clipped)
gfx.setClip (oldClip.x, oldClip.y, oldClip.width, oldClip.height);
}
}
void dispatchEventImpl(AWTEvent e)
{
// Give lightweight dispatcher a chance to handle it.
if (dispatcher != null
&& dispatcher.handleEvent (e))
return;
if ((e.id <= ContainerEvent.CONTAINER_LAST
&& e.id >= ContainerEvent.CONTAINER_FIRST)
&& (containerListener != null
@ -1319,6 +1333,17 @@ public class Container extends Component
component[i].addNotify();
if (component[i].isLightweight ())
{
// If we're not lightweight, and we just got a lightweight
// child, we need a lightweight dispatcher to feed it events.
if (! this.isLightweight()
&& dispatcher == null)
{
dispatcher = new LightweightDispatcher (this);
dispatcher.enableEvents (component[i].eventMask);
}
enableEvents(component[i].eventMask);
if (peer != null && !isLightweight ())
enableEvents (AWTEvent.PAINT_EVENT_MASK);
@ -1495,22 +1520,25 @@ public class Container extends Component
} // class Container
/**
* Undocumented helper class.
* STUBBED
* There is a helper class implied from stack traces called
* LightweightDispatcher, but since it is not part of the public API,
* rather than mimic it exactly we write something which does "roughly
* the same thing".
*/
class LightweightDispatcher implements Serializable, AWTEventListener
class LightweightDispatcher implements Serializable
{
private static final long serialVersionUID = 5184291520170872969L;
private Container nativeContainer;
private Component focus;
private transient Component mouseEventTarget;
private transient Component targetLastEntered;
private transient boolean isMouseInNativeContainer;
private Cursor nativeCursor;
private long eventMask;
private transient Component mouseEventTarget;
LightweightDispatcher(Container c)
{
nativeContainer = c;
}
void dispose()
@ -1519,40 +1547,106 @@ class LightweightDispatcher implements Serializable, AWTEventListener
void enableEvents(long l)
{
eventMask |= l;
}
boolean dispatchEvent(AWTEvent e)
{
return true;
}
boolean isMouseGrab(MouseEvent e)
{
return true;
}
boolean processMouseEvent(MouseEvent e)
{
return true;
}
void trackMouseEnterExit(Component c, MouseEvent e)
void mouseExit (MouseEvent me, int x, int y)
{
}
void startListeningForOtherDrags()
void acquireComponentForMouseEvent (MouseEvent me)
{
int x = me.getX ();
int y = me.getY ();
Component candidate = mouseEventTarget;
boolean candidate_is_container_with_children =
((candidate != null)
&& (candidate instanceof Container)
&& (((Container)candidate).getComponentCount () > 0));
boolean candidate_does_not_contain_point =
((candidate != null)
&& (! candidate.contains (x - candidate.getX (),
y - candidate.getY ())));
if (candidate == null
|| candidate_is_container_with_children
|| candidate_does_not_contain_point)
{
// Try to reacquire.
candidate = nativeContainer.findComponentAt (x, y);
}
void stopListeningForOtherDrags()
if (mouseEventTarget != null
&& mouseEventTarget != candidate)
{
int nx = x - mouseEventTarget.getX ();
int ny = y - mouseEventTarget.getY ();
MouseEvent exited = new MouseEvent (mouseEventTarget,
MouseEvent.MOUSE_EXITED,
me.getWhen (),
me.getModifiers (),
nx, ny,
me.getClickCount (),
me.isPopupTrigger (),
me.getButton ());
mouseEventTarget.dispatchEvent (exited);
mouseEventTarget = null;
}
public void eventDispatched(AWTEvent e)
if (candidate != null)
{
// Possibly set new state.
if (candidate.isLightweight()
&& candidate != nativeContainer
&& candidate != mouseEventTarget)
{
mouseEventTarget = candidate;
int nx = x - mouseEventTarget.getX ();
int ny = y - mouseEventTarget.getY ();
// If acquired, enter it.
MouseEvent entered = new MouseEvent (mouseEventTarget,
MouseEvent.MOUSE_ENTERED,
me.getWhen (),
me.getModifiers (),
nx, ny,
me.getClickCount (),
me.isPopupTrigger (),
me.getButton ());
mouseEventTarget.dispatchEvent (entered);
}
}
}
void retargetMouseEvent(Component c, int i, MouseEvent e)
boolean handleEvent (AWTEvent e)
{
if ((eventMask & e.getID ()) == 0)
return false;
if (e instanceof MouseEvent)
{
MouseEvent me = (MouseEvent) e;
acquireComponentForMouseEvent (me);
if (mouseEventTarget != null)
{
Component oldSource = (Component) me.getSource ();
me.setSource (mouseEventTarget);
mouseEventTarget.dispatchEvent (me);
me.setSource (oldSource);
}
}
else if (e instanceof KeyEvent && focus != null)
{
focus.processKeyEvent ((KeyEvent) e);
}
return e.isConsumed();
}
} // class LightweightDispatcher