tests/auto/quick/qquickitemlayer/data/Visible.qml

   1 import QtQuick 2.0
   2
   3 Item
   4 {
   5     id: root
   6
   7     width: 100
   8     height: 100
   9
  10     property bool layerEffect: false;
  11     onLayerEffectChanged: root.maybeUse();
  12     Component.onCompleted: root.maybeUse();
  13
  14     property real layerOpacity: 1;
  15     property bool layerVisible: true;
  16
  17     function maybeUse() {
  18         if (root.layerEffect)
  19             box.layer.effect = shaderEffect
  20     }
  21
  22     Component {
  23         id: shaderEffect
  24         ShaderEffect {
  25             fragmentShader: "
  26                 uniform lowp sampler2D source;
  27                 uniform lowp float qt_Opacity;
  28                 varying highp vec2 qt_TexCoord0;
  29                 void main() {
  30                     gl_FragColor = texture2D(source, qt_TexCoord0).bgra * qt_Opacity;
  31                 }
  32             "
  33         }
  34
  35     }
  36
  37     Rectangle {
  38         id: box
  39         width: 100
  40         height: 100
  41
  42         color: "#0000ff"
  43         visible: parent.layerVisible;
  44         opacity: parent.layerOpacity;
  45
  46         Rectangle {
  47             x: 50
  48             width: 50
  49             height: 100
  50             color: "#00ff00"
  51         }
  52
  53         layer.enabled: true
  54
  55     }
  56 }