From 044ffb3a4b6d7ff92e50d4df4bb8d9643c895794 Mon Sep 17 00:00:00 2001
From: Philipp Knechtges <philipp-dev@knechtges.com>
Date: Tue, 31 Jan 2012 14:34:04 +0100
Subject: [PATCH] kwin: fix Outline::hide() bug

Unless the mouse pointer is not next to an electric border kwin calls
Outline::hide() on every move/resize event. To avoid unnecessary
repaints we now check whether the outline has been visible or not.
---
 outline.cpp | 6 ++++++
 outline.h   | 1 +
 2 files changed, 7 insertions(+)

diff --git a/outline.cpp b/outline.cpp
index 6ef499ce26..7819eba969 100644
--- a/outline.cpp
+++ b/outline.cpp
@@ -29,6 +29,7 @@ namespace KWin {
 
 Outline::Outline()
     : m_initialized(false)
+    , m_active(false)
 {
 }
 
@@ -44,6 +45,7 @@ Outline::~Outline()
 
 void Outline::show()
 {
+    m_active = true;
     if (effects && static_cast<EffectsHandlerImpl*>(effects)->provides(Effect::Outline)) {
         static_cast<EffectsHandlerImpl*>(effects)->slotShowOutline(m_outlineGeometry);
         return; // done by effect
@@ -53,6 +55,10 @@ void Outline::show()
 
 void Outline::hide()
 {
+    if (!m_active) {
+        return;
+    }
+    m_active = false;
     if (effects && static_cast<EffectsHandlerImpl*>(effects)->provides(Effect::Outline)) {
         static_cast<EffectsHandlerImpl*>(effects)->slotHideOutline();
         return; // done by effect
diff --git a/outline.h b/outline.h
index 6eddaece42..20e7a8668b 100644
--- a/outline.h
+++ b/outline.h
@@ -96,6 +96,7 @@ private:
     Window m_leftOutline;
     QRect m_outlineGeometry;
     bool m_initialized;
+    bool m_active;
 };
 
 }