diff options
Diffstat (limited to 'java/awt/Component.java')
| -rw-r--r-- | java/awt/Component.java | 383 |
1 files changed, 293 insertions, 90 deletions
diff --git a/java/awt/Component.java b/java/awt/Component.java index aac94a0c9..ba669f8ec 100644 --- a/java/awt/Component.java +++ b/java/awt/Component.java @@ -39,6 +39,8 @@ exception statement from your version. */ package java.awt; +//import gnu.java.awt.dnd.peer.gtk.GtkDropTargetContextPeer; + import java.awt.dnd.DropTarget; import java.awt.event.ActionEvent; import java.awt.event.AdjustmentEvent; @@ -698,6 +700,9 @@ public abstract class Component public void setDropTarget(DropTarget dt) { this.dropTarget = dt; + + if (peer != null) + dropTarget.addNotify(peer); } /** @@ -741,16 +746,23 @@ public abstract class Component */ public Toolkit getToolkit() { - if (peer != null) + // Only heavyweight peers can handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) { - Toolkit tk = peer.getToolkit(); - if (tk != null) - return tk; + comp = comp.parent; + p = comp == null ? null : comp.peer; } - // Get toolkit for lightweight component. - if (parent != null) - return parent.getToolkit(); - return Toolkit.getDefaultToolkit(); + + Toolkit tk = null; + if (p != null) + { + tk = peer.getToolkit(); + } + if (tk == null) + tk = Toolkit.getDefaultToolkit(); + return tk; } /** @@ -1033,7 +1045,7 @@ public abstract class Component visible = false; // Avoid NullPointerExceptions by creating a local reference. - ComponentPeer currentPeer=peer; + ComponentPeer currentPeer = peer; if (currentPeer != null) { currentPeer.hide(); @@ -1292,8 +1304,26 @@ public abstract class Component // component. synchronized (getTreeLock()) { - // We know peer != null here. - return peer.getLocationOnScreen(); + // Only a heavyweight peer can answer the question for the screen + // location. So we are going through the hierarchy until we find + // one and add up the offsets while doing so. + int offsX = 0; + int offsY = 0; + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + offsX += comp.x; + offsY += comp.y; + comp = comp.parent; + p = comp == null ? null: comp.peer; + } + // Now we have a heavyweight component. + assert ! (p instanceof LightweightPeer); + Point loc = p.getLocationOnScreen(); + loc.x += offsX; + loc.y += offsY; + return loc; } } @@ -1533,7 +1563,17 @@ public abstract class Component } } - private void notifyReshape(boolean resized, boolean moved) + /** + * Sends notification to interested listeners about resizing and/or moving + * the component. If this component has interested + * component listeners or the corresponding event mask enabled, then + * COMPONENT_MOVED and/or COMPONENT_RESIZED events are posted to the event + * queue. + * + * @param resized true if the component has been resized, false otherwise + * @param moved true if the component has been moved, false otherwise + */ + void notifyReshape(boolean resized, boolean moved) { // Only post an event if this component actually has a listener // or has this event explicitly enabled. @@ -1544,43 +1584,16 @@ public abstract class Component if (moved) { ComponentEvent ce = new ComponentEvent(this, - ComponentEvent.COMPONENT_MOVED); + ComponentEvent.COMPONENT_MOVED); getToolkit().getSystemEventQueue().postEvent(ce); } if (resized) { ComponentEvent ce = new ComponentEvent(this, - ComponentEvent.COMPONENT_RESIZED); + ComponentEvent.COMPONENT_RESIZED); getToolkit().getSystemEventQueue().postEvent(ce); } } - else - { - // Otherwise we might need to notify child components when this is - // a Container. - if (this instanceof Container) - { - Container cont = (Container) this; - if (resized) - { - for (int i = 0; i < cont.getComponentCount(); i++) - { - Component child = cont.getComponent(i); - child.fireHierarchyEvent(HierarchyEvent.ANCESTOR_RESIZED, - this, parent, 0); - } - } - if (moved) - { - for (int i = 0; i < cont.getComponentCount(); i++) - { - Component child = cont.getComponent(i); - child.fireHierarchyEvent(HierarchyEvent.ANCESTOR_MOVED, - this, parent, 0); - } - } - } - } } /** @@ -2063,21 +2076,29 @@ public abstract class Component */ public Graphics getGraphics() { - if (peer != null) + // Only heavyweight peers can handle this. + ComponentPeer p = peer; + Component comp = this; + int offsX = 0; + int offsY = 0; + while (p instanceof LightweightPeer) { - Graphics gfx = peer.getGraphics(); - // Create peer for lightweights. - if (gfx == null && parent != null) - { - gfx = parent.getGraphics(); - gfx.clipRect(getX(), getY(), getWidth(), getHeight()); - gfx.translate(getX(), getY()); - return gfx; - } + offsX += comp.x; + offsY += comp.y; + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + Graphics gfx = null; + if (p != null) + { + assert ! (p instanceof LightweightPeer); + gfx = p.getGraphics(); + gfx.translate(offsX, offsY); + gfx.clipRect(0, 0, width, height); gfx.setFont(font); - return gfx; } - return null; + return gfx; } /** @@ -2091,8 +2112,16 @@ public abstract class Component */ public FontMetrics getFontMetrics(Font font) { - return peer == null ? getToolkit().getFontMetrics(font) - : peer.getFontMetrics(font); + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + return p == null ? getToolkit().getFontMetrics(font) + : p.getFontMetrics(font); } /** @@ -2111,8 +2140,18 @@ public abstract class Component public void setCursor(Cursor cursor) { this.cursor = cursor; - if (peer != null) - peer.setCursor(cursor); + + // Only heavyweight peers handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + if (p != null) + p.setCursor(cursor); } /** @@ -2283,7 +2322,7 @@ public abstract class Component pw = Math.min(pw, par.width); ph = Math.min(ph, par.height); par = par.parent; - p = par.peer; + p = par == null ? null : par.peer; } // Now send an UPDATE event to the heavyweight component that we've found. @@ -2380,11 +2419,22 @@ public abstract class Component */ public Image createImage(ImageProducer producer) { + // Only heavyweight peers can handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + // Sun allows producer to be null. - if (peer != null) - return peer.createImage(producer); + Image im; + if (p != null) + im = p.createImage(producer); else - return getToolkit().createImage(producer); + im = getToolkit().createImage(producer); + return im; } /** @@ -2400,10 +2450,16 @@ public abstract class Component Image returnValue = null; if (!GraphicsEnvironment.isHeadless ()) { - if (isLightweight () && parent != null) - returnValue = parent.createImage (width, height); - else if (peer != null) - returnValue = peer.createImage (width, height); + // Only heavyweight peers can handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + returnValue = p.createImage(width, height); } return returnValue; } @@ -2419,9 +2475,19 @@ public abstract class Component */ public VolatileImage createVolatileImage(int width, int height) { - if (peer != null) - return peer.createVolatileImage(width, height); - return null; + // Only heavyweight peers can handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + VolatileImage im = null; + if (p != null) + im = p.createVolatileImage(width, height); + return im; } /** @@ -2440,9 +2506,19 @@ public abstract class Component ImageCapabilities caps) throws AWTException { - if (peer != null) - return peer.createVolatileImage(width, height); - return null; + // Only heavyweight peers can handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + VolatileImage im = null; + if (p != null) + im = peer.createVolatileImage(width, height); + return im; } /** @@ -2472,10 +2548,21 @@ public abstract class Component public boolean prepareImage(Image image, int width, int height, ImageObserver observer) { - if (peer != null) - return peer.prepareImage(image, width, height, observer); + // Only heavyweight peers handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + boolean retval; + if (p != null) + retval = p.prepareImage(image, width, height, observer); else - return getToolkit().prepareImage(image, width, height, observer); + retval = getToolkit().prepareImage(image, width, height, observer); + return retval; } /** @@ -2509,9 +2596,21 @@ public abstract class Component public int checkImage(Image image, int width, int height, ImageObserver observer) { - if (peer != null) - return peer.checkImage(image, width, height, observer); - return getToolkit().checkImage(image, width, height, observer); + // Only heavyweight peers handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + int retval; + if (p != null) + retval = p.checkImage(image, width, height, observer); + else + retval = getToolkit().checkImage(image, width, height, observer); + return retval; } /** @@ -2956,7 +3055,7 @@ public abstract class Component case HierarchyEvent.ANCESTOR_RESIZED: enabled = hierarchyBoundsListener != null || (eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0; - break; + break; default: assert false : "Should not reach here"; } @@ -3302,18 +3401,48 @@ public abstract class Component */ protected final void enableEvents(long eventsToEnable) { + // Update the counter for hierarchy (bounds) listeners. + if ((eventsToEnable & AWTEvent.HIERARCHY_EVENT_MASK) != 0 + && (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) == 0) + { + // Need to lock the tree, otherwise we might end up inconsistent. + synchronized (getTreeLock()) + { + numHierarchyListeners++; + if (parent != null) + parent.updateHierarchyListenerCount + (AWTEvent.HIERARCHY_EVENT_MASK, + 1); + } + } + if ((eventsToEnable & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0 + && (eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) == 0) + { + // Need to lock the tree, otherwise we might end up inconsistent. + synchronized (getTreeLock()) + { + numHierarchyBoundsListeners++; + if (parent != null) + parent.updateHierarchyListenerCount + (AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK, + 1); + } + } + eventMask |= eventsToEnable; - // TODO: Unlike Sun's implementation, I think we should try and - // enable/disable events at the peer (gtk/X) level. This will avoid - // clogging the event pipeline with useless mousemove events that - // we arn't interested in, etc. This will involve extending the peer - // interface, but thats okay because the peer interfaces have been - // deprecated for a long time, and no longer feature in the - // API specification at all. - if (isLightweight() && parent != null) - parent.enableEvents(eventsToEnable); - else if (peer != null) - peer.setEventMask(eventMask); + + // Only heavyweight peers handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + if (p != null) + p.setEventMask(eventMask); + } /** @@ -3326,8 +3455,48 @@ public abstract class Component */ protected final void disableEvents(long eventsToDisable) { + // Update the counter for hierarchy (bounds) listeners. + if ((eventsToDisable & AWTEvent.HIERARCHY_EVENT_MASK) != 0 + && (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0) + { + // Need to lock the tree, otherwise we might end up inconsistent. + synchronized (getTreeLock()) + { + numHierarchyListeners--; + if (parent != null) + parent.updateHierarchyListenerCount + (AWTEvent.HIERARCHY_EVENT_MASK, + -1); + } + } + if ((eventsToDisable & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0 + && (eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0) + { + // Need to lock the tree, otherwise we might end up inconsistent. + synchronized (getTreeLock()) + { + numHierarchyBoundsListeners--; + if (parent != null) + parent.updateHierarchyListenerCount + (AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK, + -1); + } + } + eventMask &= ~eventsToDisable; - // forward new event mask to peer? + + // Only heavyweight peers handle this. + ComponentPeer p = peer; + Component comp = this; + while (p instanceof LightweightPeer) + { + comp = comp.parent; + p = comp == null ? null : comp.peer; + } + + if (p != null) + p.setEventMask(eventMask); + } /** @@ -3887,6 +4056,13 @@ public abstract class Component etc. */ if (dropTarget != null) dropTarget.addNotify(peer); + + // Notify hierarchy listeners. + long flags = HierarchyEvent.DISPLAYABILITY_CHANGED; + if (isHierarchyVisible()) + flags |= HierarchyEvent.SHOWING_CHANGED; + fireHierarchyEvent(HierarchyEvent.HIERARCHY_CHANGED, this, parent, + flags); } } @@ -3916,6 +4092,13 @@ public abstract class Component tmp.hide(); tmp.dispose(); } + + // Notify hierarchy listeners. + long flags = HierarchyEvent.DISPLAYABILITY_CHANGED; + if (isHierarchyVisible()) + flags |= HierarchyEvent.SHOWING_CHANGED; + fireHierarchyEvent(HierarchyEvent.HIERARCHY_CHANGED, this, parent, + flags); } } @@ -5494,6 +5677,26 @@ p * <li>the set of backward traversal keys } /** + * Returns <code>true</code> when this component and all of its ancestors + * are visible, <code>false</code> otherwise. + * + * @return <code>true</code> when this component and all of its ancestors + * are visible, <code>false</code> otherwise + */ + boolean isHierarchyVisible() + { + boolean visible = isVisible(); + Component comp = parent; + while (comp != null && visible) + { + comp = comp.parent; + if (comp != null) + visible = visible && comp.isVisible(); + } + return visible; + } + + /** * Coalesce paint events. Current heuristic is: Merge if the union of * areas is less than twice that of the sum of the areas. The X server * tend to create a lot of paint events that are adjacent but not |