From 6c971a4462c245c8e9f5b46323d0199c2a8cc79e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lubo=C5=A1=20Lu=C5=88=C3=A1k?= <l.lunak@kde.org>
Date: Fri, 13 Apr 2007 14:42:37 +0000
Subject: [PATCH] ZoomIn/ZoomOut/ActualSize actions.

svn path=/branches/work/kwin_composite/; revision=653520
---
 effects/zoom.cpp | 40 +++++++++++++++++++++++++++++++++++++---
 effects/zoom.h   |  7 ++++++-
 2 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/effects/zoom.cpp b/effects/zoom.cpp
index 1644b71c30..56dea8ec45 100644
--- a/effects/zoom.cpp
+++ b/effects/zoom.cpp
@@ -10,6 +10,10 @@ License. See the file "COPYING" for the exact licensing terms.
 
 #include "zoom.h"
 
+#include <kaction.h>
+#include <kactioncollection.h>
+#include <kstandardaction.h>
+
 namespace KWin
 {
 
@@ -17,8 +21,16 @@ KWIN_EFFECT( Zoom, ZoomEffect )
 
 ZoomEffect::ZoomEffect()
     : zoom( 1 )
-    , target_zoom( 2 )
+    , target_zoom( 1 )
     {
+    KActionCollection* actionCollection = new KActionCollection( this );
+    KAction* a;
+    a = static_cast< KAction* >( actionCollection->addAction( KStandardAction::ZoomIn, this, SLOT( zoomIn())));
+    a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Equal));
+    a = static_cast< KAction* >( actionCollection->addAction( KStandardAction::ZoomOut, this, SLOT( zoomOut())));
+    a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Minus));
+    a = static_cast< KAction* >( actionCollection->addAction( KStandardAction::ActualSize, this, SLOT( actualSize())));
+    a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_0));
     }
 
 void ZoomEffect::prePaintScreen( int* mask, QRegion* region, int time )
@@ -27,9 +39,9 @@ void ZoomEffect::prePaintScreen( int* mask, QRegion* region, int time )
         {
         double diff = time / 500.0;
         if( target_zoom > zoom )
-            zoom = qMin( zoom + diff, target_zoom );
+            zoom = qMin( zoom * qMax( 1 + diff, 1.2 ), target_zoom );
         else
-            zoom = qMax( zoom - diff, target_zoom );
+            zoom = qMax( zoom * qMin( 1 - diff, 0.8 ), target_zoom );
         }
     if( zoom != 1.0 )
         *mask |= PAINT_SCREEN_TRANSFORMED;
@@ -57,4 +69,26 @@ void ZoomEffect::postPaintScreen()
     effects->postPaintScreen();
     }
 
+void ZoomEffect::zoomIn()
+    {
+    target_zoom *= 1.2;
+    effects->addRepaintFull();
+    }
+
+void ZoomEffect::zoomOut()
+    {
+    target_zoom /= 1.2;
+    if( target_zoom < 1 )
+        target_zoom = 1;
+    effects->addRepaintFull();
+    }
+
+void ZoomEffect::actualSize()
+    {
+    target_zoom = 1;
+    effects->addRepaintFull();
+    }
+
 } // namespace
+
+#include "zoom.moc"
diff --git a/effects/zoom.h b/effects/zoom.h
index 61723a9e1c..44eda47cac 100644
--- a/effects/zoom.h
+++ b/effects/zoom.h
@@ -17,13 +17,18 @@ namespace KWin
 {
 
 class ZoomEffect
-    : public Effect
+    : public QObject, public Effect
     {
+    Q_OBJECT
     public:
         ZoomEffect();
         virtual void prePaintScreen( int* mask, QRegion* region, int time );
         virtual void paintScreen( int mask, QRegion region, ScreenPaintData& data );
         virtual void postPaintScreen();
+    private slots:
+        void zoomIn();
+        void zoomOut();
+        void actualSize();
     private:
         double zoom;
         double target_zoom;