1 files changed, 75 insertions, 0 deletions
diff --git a/examples/animation/easing/animation.h b/examples/animation/easing/animation.h
new file mode 100644
index 0000000..db67810
--- /dev/null
+++ b/examples/animation/easing/animation.h
@@ -0,0 +1,75 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the $MODULE$ of the Qt Toolkit.
+**
+** $TROLLTECH_DUAL_LICENSE$
+**
+****************************************************************************/
+
+#ifndef ANIMATION_H
+#define ANIMATION_H
+
+#include <QtGui>
+
+#if defined(QT_EXPERIMENTAL_SOLUTION)
+# include "qpropertyanimation.h"
+#else
+# include <QtCore/qpropertyanimation.h>
+#endif
+
+class Animation : public QPropertyAnimation {
+public:
+    enum PathType {
+        LinearPath,
+        CirclePath,
+        NPathTypes
+    };
+    Animation(QObject *target, const QByteArray &prop)
+        : QPropertyAnimation(target, prop)
+    {
+        setPathType(LinearPath);
+    }
+
+    void setPathType(PathType pathType)
+    {
+        if (pathType >= NPathTypes)
+            qWarning("Unknown pathType %d", pathType);
+
+        m_pathType = pathType;
+        m_path = QPainterPath();
+    }
+
+    void updateCurrentTime(int msecs)
+    {
+        if (m_pathType == CirclePath) {
+            if (m_path.isEmpty()) {
+                QPointF to = endValue().toPointF();
+                QPointF from = startValue().toPointF();
+                m_path.moveTo(from);
+                m_path.addEllipse(QRectF(from, to));
+            }
+            int dura = duration();
+            const qreal progress = ((dura == 0) ? 1 : ((((currentTime() - 1) % dura) + 1) / qreal(dura)));
+
+            qreal easedProgress = easingCurve().valueForProgress(progress);
+            if (easedProgress > 1.0) {
+                easedProgress -= 1.0;
+            } else if (easedProgress < 0) {
+                easedProgress += 1.0;
+            }
+            QPointF pt = m_path.pointAtPercent(easedProgress);
+            updateCurrentValue(pt);
+            emit valueChanged(pt);
+        } else {
+            QPropertyAnimation::updateCurrentTime(msecs);
+        }
+    }
+
+    QPainterPath m_path;
+    PathType m_pathType;
+};
+
+#endif // ANIMATION_H