From: jsimomaa <jani.simomaa@gmail.com>
Date: Tue, 19 Feb 2019 12:04:45 +0000 (+0200)
Subject: Duplicate MouseWheelMovedEvent was not actually fixed
X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=commitdiff_plain;h=refs%2Fchanges%2F96%2F2696%2F1;p=simantics%2Fplatform.git

Duplicate MouseWheelMovedEvent was not actually fixed

gitlab #64

Change-Id: I4989c4f57e0a1f44a3366640c6e756ad2c93c4ad
(cherry picked from commit 162f92e52a7efa9fd0067666be6e9dfd28ec1e51)
---

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/event/adapter/SWTMouseEventAdapter.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/event/adapter/SWTMouseEventAdapter.java
index 924c7c252..1da7fe647 100644
--- a/bundles/org.simantics.g2d/src/org/simantics/g2d/event/adapter/SWTMouseEventAdapter.java
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/event/adapter/SWTMouseEventAdapter.java
@@ -166,8 +166,8 @@ public class SWTMouseEventAdapter extends AbstractEventAdapter implements MouseL
 				sender, e.time & 0xffffffff, MOUSE_ID, buttonStatus, 
 				getStateMask(e),
 				getControlPosition(e), getScreenPosition(e), 
-				MouseWheelMovedEvent.WHEEL_UNIT_SCROLL, 
-				0, 
+				MouseWheelMovedEvent.WHEEL_UNIT_SCROLL,
+				MouseWheelMovedEvent.SCROLL_AMOUNT_ZERO,
 				e.count
 				));
 	}
diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/EventQueue.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/EventQueue.java
index 9b0980600..d3ab61355 100644
--- a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/EventQueue.java
+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/EventQueue.java
@@ -42,20 +42,19 @@ public class EventQueue implements IEventQueue, IEventHandler {
         return EventTypes.AnyMask;
     }
 
-    /**
-     * 
-     */
-    private MouseWheelMovedEvent lastMouseWheelMovedEvent;
-    
     private static final String DISABLE_DUPLICATE_REMOVAL = "org.simantics.scenegraph.g2d.events.disableDuplicateMouseWheelEvent";
     private static final boolean IGNORE_DUPLICATE = !Boolean.parseBoolean(System.getProperty(DISABLE_DUPLICATE_REMOVAL));
     
     private boolean ignoreDuplicateMouseWheelMovedEvent(Event e) {
         if (IGNORE_DUPLICATE && e instanceof MouseWheelMovedEvent) {
-            if (e.time > 0 && (lastMouseWheelMovedEvent != null && lastMouseWheelMovedEvent.time < 0)) {
+            MouseWheelMovedEvent event = (MouseWheelMovedEvent) e;
+            // if (e.time > 0 && (lastMouseWheelMovedEvent != null && lastMouseWheelMovedEvent.time < 0)) {
+            // apparently this is a better way to distinguish between SWT & AWT events
+            // SWT based event constructs the scrollAmount to = 0
+            // See org.simantics.g2d.event.adapter.SWTMouseEventAdapter.mouseScrolled(MouseEvent) L171
+            if (event.scrollAmount != MouseWheelMovedEvent.SCROLL_AMOUNT_ZERO) {
                 return true;
             }
-            lastMouseWheelMovedEvent = (MouseWheelMovedEvent) e;
         }
         return false;
     }
diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/MouseEvent.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/MouseEvent.java
index 92c97b787..8070ae358 100644
--- a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/MouseEvent.java
+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/MouseEvent.java
@@ -154,6 +154,8 @@ public abstract class MouseEvent extends Event {
 
         private static final long serialVersionUID = -7896477913481842708L;
 
+        public static final int SCROLL_AMOUNT_ZERO = 0;
+
         /**
          * Constant representing scrolling by "units" (like scrolling with the
          * arrow keys)