[GTK] Reports wrong mouse coordinates when starting a drag #2119

Thomas Singer · akurtakov · commit c20fea43ffe6 · 2026-01-23T17:58:34.000+02:00
Control: don't send MouseMove events with stateMask set for BUTTON1
before the MouseDown event was sent

These events are already added to the dragDetectionQueue, so there is no
need to send/post them now.
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Control.java b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Control.java
@@ -5091,6 +5091,7 @@ boolean sendMouseEvent (int type, int button, int count, int detail, boolean sen
 						flushQueueOnDnd();
 					} else {
 						dragDetectionQueue.add(event);
+						return true;
 					}
 					break;
 				case SWT.MouseUp:

Original file line number	Diff line number	Diff line change
`@@ -5091,6 +5091,7 @@ boolean sendMouseEvent (int type, int button, int count, int detail, boolean sen`
`5091`	`5091`	`flushQueueOnDnd();`
`5092`	`5092`	`} else {`
`5093`	`5093`	`dragDetectionQueue.add(event);`
	`5094`	`+ return true;`
`5094`	`5095`	`}`
`5095`	`5096`	`break;`
`5096`	`5097`	`case SWT.MouseUp:`