add zoom animation to new animation api

svn path=/trunk/KDE/kdelibs/; revision=1059117

CMakeLists.txt

@@ -54,6 +54,7 @@ set(plasma_LIB_SRCS
     animations/rotationstacked.cpp
     animations/stackedlayout.cpp
     animations/geo.cpp
+    animations/zoom.cpp
     applet.cpp
     configloader.cpp
     containment.cpp

animations/zoom.cpp

@@ -0,0 +1,74 @@
+/*
+ *   Copyright 2009 Igor Trindade Oliveira <igor.oliveira@indt.org.br>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as
+ *   published by the Free Software Foundation; either version 2, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include "zoom_p.h"
+
+#include <kdebug.h>
+
+namespace Plasma
+{
+
+ZoomAnimation::ZoomAnimation(QObject *parent)
+             : Animation(parent),
+             m_zoom(1)
+{
+}
+
+ZoomAnimation::~ZoomAnimation()
+{
+}
+
+
+void ZoomAnimation::setZoom(qreal zoom)
+{
+    m_zoom = zoom;
+}
+
+qreal ZoomAnimation::zoom() const
+{
+    return m_zoom;
+}
+
+void ZoomAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
+{
+    QGraphicsWidget *w = widgetToAnimate();
+    if (!w) {
+        return;
+    }
+
+    if (oldState == Stopped && newState == Running) {
+        w->setScale(direction() == Forward ? 1 : m_zoom);
+    } else if (newState == Stopped) {
+        w->setScale(direction() == Forward ? m_zoom : 1);
+    }
+}
+
+void ZoomAnimation::updateCurrentTime(int currentTime)
+{
+    QGraphicsWidget *w = widgetToAnimate();
+    if (w) {
+        qreal delta = currentTime / qreal(duration());
+        delta = (1 - m_zoom) * delta;
+        w->setScale( 1 - delta);
+    }
+
+    Animation::updateCurrentTime(currentTime);
+}
+
+} //namespace Plasma

animations/zoom_p.h

@@ -0,0 +1,60 @@
+/*
+ *   Copyright 2009 Igor Trindade Oliveira <igor.oliveira@indt.org.br>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as
+ *   published by the Free Software Foundation; either version 2, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+/**
+ * @file This file contains the definition for the Zoom animation.
+ */
+
+#ifndef PLASMA_ANIMATIONS_ZOOM_H
+#define PLASMA_ANIMATIONS_ZOOM_H
+
+#include <plasma/animations/animation.h>
+#include <plasma/plasma_export.h>
+
+namespace Plasma
+{
+
+/**
+ * @class ZoomAnimation plasma/animations/zoom_p.h
+ * @short Zoom Animation
+ *
+ */
+class ZoomAnimation : public Animation
+{
+    Q_OBJECT
+    Q_PROPERTY(qreal zoom READ zoom WRITE setZoom)
+
+public:
+    ZoomAnimation(QObject *parent = 0);
+    virtual ~ZoomAnimation();
+
+    qreal zoom() const;
+    void setZoom(qreal);
+
+protected:
+    void updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState);
+    void updateCurrentTime(int currentTime);
+
+private:
+    qreal m_zoom;
+};
+
+}
+
+#endif

animator.cpp

@@ -30,6 +30,7 @@
 #include "animations/slide_p.h"
 #include "animations/rotationstacked.h"
 #include "animations/geo_p.h"
+#include "animations/zoom_p.h"
 
 namespace Plasma
 {
@@ -66,6 +67,9 @@ Plasma::Animation* Animator::create(Animator::Animation type, QObject *parent)
     case GeoAnimation:
         result = new Plasma::GeoAnimation;
         break;
+    case ZoomAnimation:
+        result = new Plasma::ZoomAnimation;
+        break;
 
     default:
         kDebug() << "Unsupported animation type.";

animator.h

@@ -63,7 +63,8 @@ public:
         RotationAnimation, /*<< Rotate an animated object */
         RotationStackedAnimation, /*<< for flipping one object with another */
         SlideAnimation, /*<< Move the position of animated object */
-        GeoAnimation /*<< Geometry animation*/
+        GeoAnimation, /*<< Geometry animation*/
+        ZoomAnimation /*<<Zoom animation */
     };
 
     enum CurveShape {