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** This file is part of the QML Shaders plugin of the Qt Toolkit.
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****************************************************************************/
import QtQuick 1.0
import Qt.labs.shaders 1.0

Rectangle {
    id: marginTester
    anchors.fill: parent;
    color: "green"
    property real testMarginX: 10
    property real testMarginY: 10

    Timer {
        running: true
        interval: 2000
        repeat: true
        onTriggered: {
            if (marginTester.testMarginX < 20) {
                marginTester.testMarginX = 50
                marginTester.testMarginY = 120
            }
            else {
                marginTester.testMarginX = 10
                marginTester.testMarginY = 10
            }

            theSource.sourceRect = Qt.rect(-testMarginX, -testMarginY, parent.width + testMarginX*2, parent.height + testMarginY*2)
            console.log("onTriggered")
        }
    }

    Image {
        id: redrect
        source: "image_opaque.png"
    }


    ShaderEffectSource {
        id: theSource
        sourceItem: redrect
        sourceRect: Qt.rect(-10,-10, parent.width + 2*10, parent.height + 2*10)
        hideSource: true
    }

    ShaderEffectItem {
        id: effect
        anchors.fill: parent;
        property variant source: theSource
    }

    Rectangle {
        width: parent.width
        height: 40
        color: "#cc000000"

        Text {
             id: label
             anchors.centerIn:  parent
             text: theSource.sourceRect.width == 0 ? "No margins" : "Green margins " + marginTester.testMarginX + "x" + marginTester.testMarginY
             color: "white"
             font.bold: true
        }
    }
}