flickresize.qml Example File

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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
                          }
                      }
                  }
              }
          }
      }
  }