Bug 120721 too many item compare callbacks make table slow

1 files changed, 21 insertions, 0 deletions

diff --git a/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/widgets/Table.java b/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/widgets/Table.java
index aa041c627f..39daf9d20e 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/widgets/Table.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/widgets/Table.java
@@ -2034,6 +2034,27 @@ void releaseChildren (boolean destroy) {
 	super.releaseChildren (destroy);
 }
 
+void releaseWidget () {	
+	super.releaseWidget ();
+	/*
+	 * Feature in the Mac. When RemoveDataBrowserItems() is used
+	 * to remove items, item notification callbacks are issued with
+	 * the message kDataBrowserItemRemoved  When many items are
+	 * removed, this is slow.  The fix is to temporarily remove
+	 * the item notification callback.
+	 */
+	DataBrowserCallbacks callbacks = new DataBrowserCallbacks ();
+	OS.GetDataBrowserCallbacks (handle, callbacks);
+	callbacks.v1_itemNotificationCallback = 0;
+	callbacks.v1_itemCompareCallback = 0;
+	OS.SetDataBrowserCallbacks (handle, callbacks);
+	
+	currentItem = null;
+	sortColumn = null;
+	paintGC = null;
+	imageBounds = null;
+}
+
 /**
  * Removes the item from the receiver at the given
  * zero-relative index.