From df2244ebf06681ad24aae3269d4804c6547ae931 Mon Sep 17 00:00:00 2001
From: Sergey Malenkov <sergey.malenkov@jetbrains.com>
Date: Wed, 16 Mar 2016 19:15:04 +0300
Subject: [PATCH] IDEA-152991 ignore mouse motion event if mouse location on
 screen is not really changed

---
 .../com/intellij/ui/popup/list/ListPopupImpl.java    | 11 +++++++++++
 .../com/intellij/ui/popup/tree/TreePopupImpl.java    | 12 ++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/platform/platform-impl/src/com/intellij/ui/popup/list/ListPopupImpl.java b/platform/platform-impl/src/com/intellij/ui/popup/list/ListPopupImpl.java
index 045fe1ee9926..f1b05106ac98 100644
--- a/platform/platform-impl/src/com/intellij/ui/popup/list/ListPopupImpl.java
+++ b/platform/platform-impl/src/com/intellij/ui/popup/list/ListPopupImpl.java
@@ -439,9 +439,20 @@ public class ListPopupImpl extends WizardPopup implements ListPopup {
 
   private class MyMouseMotionListener extends MouseMotionAdapter {
     private int myLastSelectedIndex = -2;
+    private Point myLastMouseLocation;
+
+    private boolean isMouseMoved(Point location) {
+      if (myLastMouseLocation == null) {
+        myLastMouseLocation = location;
+        return false;
+      }
+      return !myLastMouseLocation.equals(location);
+    }
 
     @Override
     public void mouseMoved(MouseEvent e) {
+      if (!isMouseMoved(e.getLocationOnScreen())) return;
+
       Point point = e.getPoint();
       int index = myList.locationToIndex(point);
 
diff --git a/platform/platform-impl/src/com/intellij/ui/popup/tree/TreePopupImpl.java b/platform/platform-impl/src/com/intellij/ui/popup/tree/TreePopupImpl.java
index c48c39b27a8c..2748bc2525bf 100644
--- a/platform/platform-impl/src/com/intellij/ui/popup/tree/TreePopupImpl.java
+++ b/platform/platform-impl/src/com/intellij/ui/popup/tree/TreePopupImpl.java
@@ -249,8 +249,20 @@ public class TreePopupImpl extends WizardPopup implements TreePopup {
   }
 
   private class MyMouseMotionListener extends MouseMotionAdapter {
+    private Point myLastMouseLocation;
+
+    private boolean isMouseMoved(Point location) {
+      if (myLastMouseLocation == null) {
+        myLastMouseLocation = location;
+        return false;
+      }
+      return !myLastMouseLocation.equals(location);
+    }
+
     @Override
     public void mouseMoved(MouseEvent e) {
+      if (!isMouseMoved(e.getLocationOnScreen())) return;
+
       final TreePath path = getPath(e);
       if (path != null) {
         myWizardTree.setSelectionPath(path);