Qt 5.7 | Qt Quick | Qt Quick Examples - Touch Interaction | flickresize.qml Example File

Qt 5.7.1 Reference Documentation

# 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
                              }
                          }
                      }
                  }
              }
          }
      }