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

Thomas Singer · Thomas Singer · commit 77b255c1b1a2 · 2025-11-05T10:59:48.000+01:00
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
@@ -5102,6 +5102,7 @@ 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
`@@ -5102,6 +5102,7 @@ boolean sendMouseEvent (int type, int button, int count, int detail, boolean sen`
`5102`	`5102`	`flushQueueOnDnd();`
`5103`	`5103`	`} else {`
`5104`	`5104`	`dragDetectionQueue.add(event);`
	`5105`	`+ return true;`
`5105`	`5106`	`}`
`5106`	`5107`	`break;`
`5107`	`5108`	`case SWT.MouseUp:`