pathinterpolator.qml Example File

animation/pathinterpolator/pathinterpolator.qml

  /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** You may use this file under the terms of the BSD license as follows:
  **
  ** "Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
  **     notice, this list of conditions and the following disclaimer in
  **     the documentation and/or other materials provided with the
  **     distribution.
  **   * Neither the name of The Qt Company Ltd nor the names of its
  **     contributors may be used to endorse or promote products derived
  **     from this software without specific prior written permission.
  **
  **
  ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/

  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"
          }
      }
  }