Qt 5.8 | Qt Quick | Qt Quick Examples - Animation | pathinterpolator.qml Example File

Qt 5.8.0 Reference Documentation

# pathinterpolator.qml Example File

animation/pathinterpolator/pathinterpolator.qml

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      import QtQuick 2.0

      Rectangle {
          id: window
          width: 320
          height: 480

          Canvas {
              id: canvas
              anchors.fill: parent
              antialiasing: true

              onPaint: {
                  var context = canvas.getContext("2d")
                  context.clearRect(0, 0, width, height)
                  context.strokeStyle = "black"
                  context.path = motionPath.path
                  context.stroke()
              }
          }

          PathInterpolator {
              id: motionPath

              path: Path {
                  startX: 50; startY: 50

                  PathCubic {
                      x: window.width - 50
                      y: window.height - 50

                      control1X: x; control1Y: 50
                      control2X: 50; control2Y: y
                  }

                  onChanged: canvas.requestPaint()
              }

              SequentialAnimation on progress {
                  running: true
                  loops: -1
                  PauseAnimation { duration: 1000 }
                  NumberAnimation {
                      id: progressAnim
                      running: false
                      from: 0; to: 1
                      duration: 2000
                      easing.type: Easing.InQuad
                  }
              }
          }

          Rectangle {
              id: box

              width: 50; height: 50
              border.width: 1
              antialiasing: true

              //bind our attributes to follow the path as progress changes
              x: motionPath.x
              y: motionPath.y
              rotation: motionPath.angle
              transform: Translate { x: -box.width/2; y: -box.height/2 }

              Text {
                  anchors.centerIn: parent
                  text: "Box"
              }
          }
      }