Bug 215388 - Add API to make the DropTarget more open

8 files changed, 193 insertions, 7 deletions

diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/DragSource.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/DragSource.java
index d536101f94..8a7a028ba1 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/DragSource.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/DragSource.java
@@ -384,6 +384,41 @@ public Control getControl () {
 }
 
 /**
+ * Returns an array of listeners who will be notified when a drag and drop 
+ * operation is in progress, by sending it one of the messages defined in 
+ * the <code>DragSourceListener</code> interface.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see DragSourceListener
+ * @see #addDragListener
+ * @see #removeDragListener
+ * @see DragSourceEvent
+ * 
+ * @since 3.4
+ */
+public DragSourceListener[] getDragListeners() {
+	Listener[] listeners = getListeners(DND.DragStart);
+	int length = listeners.length;
+	DragSourceListener[] dragListeners = new DragSourceListener[length];
+	int count = 0;
+	for (int i = 0; i < length; i++) {
+		Listener listener = listeners[i];
+		if (listener instanceof DNDListener) {
+			dragListeners[count] = (DragSourceListener) ((DNDListener) listener).getEventListener();
+			count++;
+		}
+	}
+	if (count == length) return dragListeners;
+	DragSourceListener[] result = new DragSourceListener[count];
+	System.arraycopy(dragListeners, 0, result, 0, count);
+	return result;
+}
+
+/**
  * Returns the drag effect that is registered for this DragSource.  This drag
  * effect will be used during a drag and drop operation.
  *
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/DropTarget.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/DropTarget.java
index 9cca32f3ab..1778506094 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/DropTarget.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/DropTarget.java
@@ -505,6 +505,41 @@ public Control getControl () {
 }
 
 /**
+ * Returns an array of listeners who will be notified when a drag and drop 
+ * operation is in progress, by sending it one of the messages defined in 
+ * the <code>DropTargetListener</code> interface.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see DropTargetListener
+ * @see #addDropListener
+ * @see #removeDropListener
+ * @see DropTargetEvent
+ * 
+ * @since 3.4
+ */
+public DropTargetListener[] getDropListeners() {
+	Listener[] listeners = getListeners(DND.DragEnter);
+	int length = listeners.length;
+	DropTargetListener[] dropListeners = new DropTargetListener[length];
+	int count = 0;
+	for (int i = 0; i < length; i++) {
+		Listener listener = listeners[i];
+		if (listener instanceof DNDListener) {
+			dropListeners[count] = (DropTargetListener) ((DNDListener) listener).getEventListener();
+			count++;
+		}
+	}
+	if (count == length) return dropListeners;
+	DropTargetListener[] result = new DropTargetListener[count];
+	System.arraycopy(dropListeners, 0, result, 0, count);
+	return result;
+}
+
+/**
  * Returns the drop effect for this DropTarget.  This drop effect will be 
  * used during a drag and drop to display the drag under effect on the 
  * target widget.
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DragSource.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DragSource.java
index 216f0b6a1a..ebe13998be 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DragSource.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DragSource.java
@@ -467,6 +467,40 @@ public Control getControl () {
 	return control;
 }
 /**
+ * Returns an array of listeners who will be notified when a drag and drop 
+ * operation is in progress, by sending it one of the messages defined in 
+ * the <code>DragSourceListener</code> interface.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see DragSourceListener
+ * @see #addDragListener
+ * @see #removeDragListener
+ * @see DragSourceEvent
+ * 
+ * @since 3.4
+ */
+public DragSourceListener[] getDragListeners() {
+	Listener[] listeners = getListeners(DND.DragStart);
+	int length = listeners.length;
+	DragSourceListener[] dragListeners = new DragSourceListener[length];
+	int count = 0;
+	for (int i = 0; i < length; i++) {
+		Listener listener = listeners[i];
+		if (listener instanceof DNDListener) {
+			dragListeners[count] = (DragSourceListener) ((DNDListener) listener).getEventListener();
+			count++;
+		}
+	}
+	if (count == length) return dragListeners;
+	DragSourceListener[] result = new DragSourceListener[count];
+	System.arraycopy(dragListeners, 0, result, 0, count);
+	return result;
+}
+/**
  * Returns the drag effect that is registered for this DragSource.  This drag
  * effect will be used during a drag and drop operation.
  *
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DropTarget.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DropTarget.java
index cff8fbf7d2..72ce4ed634 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DropTarget.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/DropTarget.java
@@ -520,6 +520,41 @@ public Control getControl () {
 }
 
 /**
+ * Returns an array of listeners who will be notified when a drag and drop 
+ * operation is in progress, by sending it one of the messages defined in 
+ * the <code>DropTargetListener</code> interface.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see DropTargetListener
+ * @see #addDropListener
+ * @see #removeDropListener
+ * @see DropTargetEvent
+ * 
+ * @since 3.4
+ */
+public DropTargetListener[] getDropListeners() {
+	Listener[] listeners = getListeners(DND.DragEnter);
+	int length = listeners.length;
+	DropTargetListener[] dropListeners = new DropTargetListener[length];
+	int count = 0;
+	for (int i = 0; i < length; i++) {
+		Listener listener = listeners[i];
+		if (listener instanceof DNDListener) {
+			dropListeners[count] = (DropTargetListener) ((DNDListener) listener).getEventListener();
+			count++;
+		}
+	}
+	if (count == length) return dropListeners;
+	DropTargetListener[] result = new DropTargetListener[count];
+	System.arraycopy(dropListeners, 0, result, 0, count);
+	return result;
+}
+
+/**
  * Returns the drop effect for this DropTarget.  This drop effect will be 
  * used during a drag and drop to display the drag under effect on the 
  * target widget.
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/wpf/org/eclipse/swt/dnd/DragSource.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/wpf/org/eclipse/swt/dnd/DragSource.java
index 57b2437427..652a562378 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/wpf/org/eclipse/swt/dnd/DragSource.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/wpf/org/eclipse/swt/dnd/DragSource.java
@@ -11,7 +11,6 @@
 package org.eclipse.swt.dnd;
 
  
-import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.wpf.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.widgets.*;
@@ -308,8 +307,7 @@ public DragSourceListener[] getDragListeners() {
 	for (int i = 0; i < length; i++) {
 		Listener listener = listeners[i];
 		if (listener instanceof DNDListener) {
-			SWTEventListener eventListener = ((DNDListener) listener).getEventListener();
-			dragListeners[count] = (DragSourceListener) eventListener;
+			dragListeners[count] = (DragSourceListener) ((DNDListener) listener).getEventListener();
 			count++;
 		}
 	}
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/wpf/org/eclipse/swt/dnd/DropTarget.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/wpf/org/eclipse/swt/dnd/DropTarget.java
index f2aaf8f0c0..760ca721e1 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/wpf/org/eclipse/swt/dnd/DropTarget.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/wpf/org/eclipse/swt/dnd/DropTarget.java
@@ -11,10 +11,9 @@
 package org.eclipse.swt.dnd;
 
 
+import org.eclipse.swt.internal.wpf.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
-import org.eclipse.swt.internal.*;
-import org.eclipse.swt.internal.wpf.*;
 import org.eclipse.swt.widgets.*;
 
 /**
@@ -465,8 +464,7 @@ public DropTargetListener[] getDropListeners() {
 	for (int i = 0; i < length; i++) {
 		Listener listener = listeners[i];
 		if (listener instanceof DNDListener) {
-			SWTEventListener eventListener = ((DNDListener) listener).getEventListener();
-			dropListeners[count] = (DropTargetListener) eventListener;
+			dropListeners[count] = (DropTargetListener) ((DNDListener) listener).getEventListener();
 			count++;
 		}
 	}
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Widget.java b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Widget.java
index 40c7f7c605..85f2211763 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Widget.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Widget.java
@@ -521,6 +521,32 @@ public Display getDisplay () {
 	return display;
 }
 
+/**
+ * Returns an array of listeners who will be notified when an event 
+ * of the given type occurs. The event type is one of the event constants 
+ * defined in class <code>SWT</code>.
+ *
+ * @param eventType the type of event to listen for
+ * @return an array of listeners that will be notified when the event occurs
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see Listener
+ * @see SWT
+ * @see #addListener(int, Listener)
+ * @see #removeListener(int, Listener)
+ * @see #notifyListeners
+ * 
+ * @since 3.4
+ */
+public Listener[] getListeners (int eventType) {
+	checkWidget();
+	return eventTable.getListeners(eventType);
+}
+
 String getName () {
 //	String string = getClass ().getName ();
 //	int index = string.lastIndexOf ('.');
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Widget.java b/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Widget.java
index b240ffb31d..c2a6aca195 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Widget.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Widget.java
@@ -464,6 +464,31 @@ public Display getDisplay () {
 	if (display == null) error (SWT.ERROR_WIDGET_DISPOSED);
 	return display;
 }
+/**
+ * Returns an array of listeners who will be notified when an event 
+ * of the given type occurs. The event type is one of the event constants 
+ * defined in class <code>SWT</code>.
+ *
+ * @param eventType the type of event to listen for
+ * @return an array of listeners that will be notified when the event occurs
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see Listener
+ * @see SWT
+ * @see #addListener(int, Listener)
+ * @see #removeListener(int, Listener)
+ * @see #notifyListeners
+ * 
+ * @since 3.4
+ */
+public Listener[] getListeners (int eventType) {
+	checkWidget();
+	return eventTable.getListeners(eventType);
+}
 String getName () {
 	String string = getClass ().getName ();
 	int index = string.lastIndexOf ('.');