PinchArea example produced incorrect scaling.

The maths was dodgy - producing far greater scaling than that provided
by PinchArea.

Change-Id: I4a1ee1b0d65eed623ec9ee92c22c9740116430c5
Task-number: QTBUG-17828
Reviewed-by: Michael Brasser

1 files changed, 9 insertions, 2 deletions

diff --git a/examples/declarative/touchinteraction/pincharea/flickresize.qml b/examples/declarative/touchinteraction/pincharea/flickresize.qml
index a2f81ff..9439ace 100644
--- a/examples/declarative/touchinteraction/pincharea/flickresize.qml
+++ b/examples/declarative/touchinteraction/pincharea/flickresize.qml
@@ -54,14 +54,21 @@ Rectangle {
         PinchArea {
             width: Math.max(flick.contentWidth, flick.width)
             height: Math.max(flick.contentHeight, flick.height)
+
+            property real initialWidth
+            property real initialHeight
+            onPinchStarted: {
+                initialWidth = flick.contentWidth
+                initialHeight = flick.contentHeight
+            }
+
             onPinchUpdated: {
                 // adjust content pos due to drag
                 flick.contentX += pinch.previousCenter.x - pinch.center.x
                 flick.contentY += pinch.previousCenter.y - pinch.center.y
 
                 // resize content
-                var scale = 1.0 + pinch.scale - pinch.previousScale
-                flick.resizeContent(flick.contentWidth * scale, flick.contentHeight * scale, pinch.center)
+                flick.resizeContent(initialWidth * pinch.scale, initialHeight * pinch.scale, pinch.center)
             }
 
             onPinchFinished: {