From dcab3d44f37d0e3de7d3371cc4d3ff327e9b0573 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20L=C3=BCbking?= <thomas.luebking@gmail.com>
Date: Sat, 29 Dec 2012 16:27:08 +0100
Subject: [PATCH] snaphelper: repaint center rect on resizing client

BUG: 311551
FIXED-IN: 4.10
REVIEW: 108005
---
 effects/snaphelper/snaphelper.cpp | 16 ++++++++++++++--
 effects/snaphelper/snaphelper.h   |  1 +
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/effects/snaphelper/snaphelper.cpp b/effects/snaphelper/snaphelper.cpp
index cdb00bc65d..f2a286aa5a 100644
--- a/effects/snaphelper/snaphelper.cpp
+++ b/effects/snaphelper/snaphelper.cpp
@@ -39,6 +39,7 @@ SnapHelperEffect::SnapHelperEffect()
     connect(effects, SIGNAL(windowClosed(KWin::EffectWindow*)), this, SLOT(slotWindowClosed(KWin::EffectWindow*)));
     connect(effects, SIGNAL(windowStartUserMovedResized(KWin::EffectWindow*)), this, SLOT(slotWindowStartUserMovedResized(KWin::EffectWindow*)));
     connect(effects, SIGNAL(windowFinishUserMovedResized(KWin::EffectWindow*)), this, SLOT(slotWindowFinishUserMovedResized(KWin::EffectWindow*)));
+    connect(effects, SIGNAL(windowGeometryShapeChanged(KWin::EffectWindow*, const QRect&)), this, SLOT(slotWindowResized(KWin::EffectWindow*, const QRect&)));
 
     /*if ( effects->compositingType() == XRenderCompositing )
         {
@@ -94,7 +95,7 @@ void SnapHelperEffect::postPaintScreen()
             glLineWidth(4.0);
             QVector<float> verts;
             verts.reserve(effects->numScreens() * 24);
-            for (int i = 0; i < effects->numScreens(); i++) {
+            for (int i = 0; i < effects->numScreens(); ++i) {
                 const QRect& rect = effects->clientArea(ScreenArea, i, 0);
                 int midX = rect.x() + rect.width() / 2;
                 int midY = rect.y() + rect.height() / 2 ;
@@ -126,7 +127,7 @@ void SnapHelperEffect::postPaintScreen()
         }
         if ( effects->compositingType() == XRenderCompositing ) {
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
-            for ( int i = 0; i < effects->numScreens(); i++ ) {
+            for (int i = 0; i < effects->numScreens(); ++i) {
                 const QRect& rect = effects->clientArea( ScreenArea, i, 0 );
                 int midX = rect.x() + rect.width() / 2;
                 int midY = rect.y() + rect.height() / 2 ;
@@ -201,6 +202,17 @@ void SnapHelperEffect::slotWindowFinishUserMovedResized(EffectWindow *w)
     }
 }
 
+void SnapHelperEffect::slotWindowResized(KWin::EffectWindow *w, const QRect &oldRect)
+{
+    if (w == m_window) {
+        QRect r(oldRect);
+        for (int i = 0; i < effects->numScreens(); ++i) {
+            r.moveCenter(effects->clientArea( ScreenArea, i, 0 ).center());
+            effects->addRepaint(r);
+        }
+    }
+}
+
 bool SnapHelperEffect::isActive() const
 {
     return m_active || m_timeline.currentValue() != 0.0;
diff --git a/effects/snaphelper/snaphelper.h b/effects/snaphelper/snaphelper.h
index 464ae3f080..3dd67314bc 100644
--- a/effects/snaphelper/snaphelper.h
+++ b/effects/snaphelper/snaphelper.h
@@ -45,6 +45,7 @@ public Q_SLOTS:
     void slotWindowClosed(KWin::EffectWindow *w);
     void slotWindowStartUserMovedResized(KWin::EffectWindow *w);
     void slotWindowFinishUserMovedResized(KWin::EffectWindow *w);
+    void slotWindowResized(KWin::EffectWindow *w, const QRect &r);
 
 private:
     bool m_active;