support setting the direction forwards or backwards; conflicts with direction so used a bool instead of an enum, makes more sense anyways imho. the use of an enum in QAbstractAnimation seems a bit overkill

svn path=/trunk/KDE/kdelibs/; revision=1038850

animations/abstractanimation.cpp

@@ -22,15 +22,22 @@
 
 #include <QEasingCurve>
 
+#include <kdebug.h>
+
 namespace Plasma
 {
 
+AbstractAnimationPrivate::AbstractAnimationPrivate()
+    : easingCurve(QEasingCurve::Linear),
+      animVisible(true),
+      forwards(true)
+{
+}
 
 AbstractAnimation::AbstractAnimation(QObject *parent)
     : QObject(parent),
       d(new AbstractAnimationPrivate)
 {
-    d->easingCurve = QEasingCurve::Linear;
 }
 
 AbstractAnimation::~AbstractAnimation()
@@ -58,6 +65,16 @@ QEasingCurve::Type AbstractAnimation::easingCurveType() const
     return d->easingCurve;
 }
 
+void AbstractAnimation::setForwards(bool forwards)
+{
+    d->forwards = forwards;
+}
+
+bool AbstractAnimation::forwards() const
+{
+    return d->forwards;
+}
+
 void AbstractAnimation::setDirection(AnimationDirection direction)
 {
     d->animDirection = direction;
@@ -123,6 +140,8 @@ void AbstractAnimation::start()
 {
     QAbstractAnimation* anim = toQAbstractAnimation(parent());
     if (anim) {
+        anim->setDirection(d->forwards ? QAbstractAnimation::Forward :
+                                         QAbstractAnimation::Backward);
         anim->start(QAbstractAnimation::DeleteWhenStopped);
     }
 }

animations/abstractanimation.h

@@ -51,6 +51,8 @@ class PLASMA_EXPORT AbstractAnimation : public QObject
     Q_PROPERTY(qreal distance READ distance WRITE setDistance)
     Q_PROPERTY(bool isVisible READ isVisible WRITE setVisible)
     Q_PROPERTY(QGraphicsWidget *widgetToAnimate READ widgetToAnimate WRITE setWidgetToAnimate)
+    Q_PROPERTY(bool forwards READ forwards WRITE setForwards)
+
     /**
      * TODO: add missing properties (e.g. angle, axis, reference, etc)
      */
@@ -101,6 +103,17 @@ public:
      */
     QEasingCurve::Type easingCurveType() const;
 
+    /**
+     * Sets whether the animation will run forwards or backwards
+     * @arg forward true to run the animation forewards
+     */
+    void setForwards(bool forward);
+
+    /**
+     * @return true if the animation will run forwards, false if it will run backwards
+     */
+    bool forwards() const;
+
     /**
      * Set the animation direction
      * @arg direction animation direction