flickresize.qml Example File

touchinteraction/pincharea/flickresize.qml
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 import QtQuick 2.0

 Rectangle {
     width: 640
     height: 360
     color: "gray"

     Flickable {
         id: flick
         anchors.fill: parent
         contentWidth: 500
         contentHeight: 500

         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
                 flick.resizeContent(initialWidth * pinch.scale, initialHeight * pinch.scale, pinch.center)
             }

             onPinchFinished: {
                 // Move its content within bounds.
                 flick.returnToBounds()
             }

             Rectangle {
                 width: flick.contentWidth
                 height: flick.contentHeight
                 color: "white"
                 Image {
                     anchors.fill: parent
                     source: "qt-logo.jpg"
                     MouseArea {
                         anchors.fill: parent
                         onDoubleClicked: {
                             flick.contentWidth = 500
                             flick.contentHeight = 500
                         }
                     }
                 }
             }
         }
     }
 }