main.qml Example File

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  ** Copyright (C) 2014 Gunnar Sletta <gunnar@sletta.org>
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  ** This file is part of the examples of the Qt Toolkit.
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  import QtQuick 2.2
  import SceneGraphRendering 1.0

  Item {
      id: root

      // The checkers background
      ShaderEffect {
          anchors.fill: parent

          property real tileSize: 16
          property color color1: Qt.rgba(0.9, 0.9, 0.9, 1);
          property color color2: Qt.rgba(0.8, 0.8, 0.8, 1);

          property size pixelSize: Qt.size(width / tileSize, height / tileSize);

          fragmentShader:
              "
          uniform lowp vec4 color1;
          uniform lowp vec4 color2;
          uniform highp vec2 pixelSize;
          varying highp vec2 qt_TexCoord0;
          void main() {
              highp vec2 tc = sign(sin(3.14152 * qt_TexCoord0 * pixelSize));
              if (tc.x != tc.y)
                  gl_FragColor = color1;
              else
                  gl_FragColor = color2;
          }
          "
      }

      width: 320
      height: 480

      Item {
          id: box
          width: root.width * 0.9
          height: width

          Rectangle {
              anchors.centerIn: parent
              width: parent.width * 0.9
              height: parent.width * 0.4
              radius: width * 0.1;
              gradient: Gradient {
                  GradientStop { position: 0; color: Qt.hsla(0.6, 0.9, 0.9, 1); }
                  GradientStop { position: 1; color: Qt.hsla(0.6, 0.6, 0.3, 1); }
              }
              RotationAnimator on rotation { from: 0; to: 360; duration: 10000; loops: Animation.Infinite }
          }

          visible: false
          layer.enabled: true
      }

      Item {
          id: text
          width: box.width
          height: width
          Text {
              anchors.centerIn: parent
              color: "black" // Qt.hsla(0.8, 0.8, 0.8);
              text: "Qt\nQuick"

              horizontalAlignment: Text.AlignHCenter

              font.bold: true
              font.pixelSize: text.width * 0.25
              RotationAnimator on rotation { from: 360; to: 0; duration: 9000; loops: Animation.Infinite }
          }
          visible: false
          layer.enabled: true
      }

      XorBlender {
          anchors.horizontalCenter: parent.horizontalCenter
          y: root.height * 0.05;
          width: box.width
          height: box.height
          source1: box
          source2: text
      }

      Rectangle {
          id: labelFrame
          anchors.margins: -10
          radius: 10
          color: "white"
          border.color: "black"
          opacity: 0.8
          anchors.fill: description
      }

      Text {
          id: description
          anchors.left: parent.left
          anchors.right: parent.right
          anchors.bottom: parent.bottom
          anchors.margins: 20
          wrapMode: Text.WordWrap
          text: "This example creates two animated items and sets 'layer.enabled: true' on both of them. " +
                "This turns the items into texture providers and we can access their texture from C++ in a custom material. " +
                "The XorBlender is a custom C++ item which uses performs an Xor blend between them."
      }
  }