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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** 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 Nokia Corporation and its Subsidiary(-ies) 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
+import "../contents"
+Item {
+ id:container
+ width:360
+ height:600
+
+ Column {
+ spacing:5
+ anchors.fill:parent
+ Text { font.pointSize:25; text:"Quadratic Curve"; anchors.horizontalCenter:parent.horizontalCenter}
+
+ Canvas {
+ id:canvas
+ width:360
+ height:360
+ property string strokeStyle:"steelblue"
+ property string fillStyle:"yellow"
+ property int lineWidth:lineWidthCtrl.value
+ property bool fill:true
+ property bool stroke:true
+ property real alpha:alphaCtrl.value
+ property real scaleX : scaleXCtrl.value
+ property real scaleY : scaleYCtrl.value
+ property real rotate : rotateCtrl.value
+ smooth:true
+ renderTarget:Canvas.Image
+ renderStrategy: Canvas.Immediate
+
+ onLineWidthChanged:requestPaint();
+ onFillChanged:requestPaint();
+ onStrokeChanged:requestPaint();
+ onAlphaChanged:requestPaint();
+ onScaleXChanged:requestPaint();
+ onScaleYChanged:requestPaint();
+ onRotateChanged:requestPaint();
+ Behavior on scaleX { SpringAnimation { spring: 2; damping: 0.2; loops:Animation.Infinite } }
+ Behavior on scaleY { SpringAnimation { spring: 2; damping: 0.2; loops:Animation.Infinite} }
+ Behavior on rotate { SpringAnimation { spring: 2; damping: 0.2; loops:Animation.Infinite} }
+
+ onPaint: {
+ var ctx = canvas.getContext('2d');
+ ctx.save();
+ ctx.clearRect(0, 0, canvas.width, canvas.height);
+ ctx.globalAlpha = canvas.alpha;
+ ctx.strokeStyle = canvas.strokeStyle;
+ ctx.fillStyle = canvas.fillStyle;
+ ctx.lineWidth = canvas.lineWidth;
+ ctx.scale(canvas.scaleX, canvas.scaleY);
+ ctx.rotate(canvas.rotate);
+ ctx.beginPath();
+ ctx.moveTo(75,25);
+ ctx.quadraticCurveTo(25,25,25,62.5);
+ ctx.quadraticCurveTo(25,100,50,100);
+ ctx.quadraticCurveTo(50,120,30,125);
+ ctx.quadraticCurveTo(60,120,65,100);
+ ctx.quadraticCurveTo(125,100,125,62.5);
+ ctx.quadraticCurveTo(125,25,75,25);
+ ctx.closePath();
+ if (canvas.fill)
+ ctx.fill();
+ if (canvas.stroke)
+ ctx.stroke();
+
+
+ ctx.fillStyle="green";
+ ctx.font = "Bold 15px";
+
+ ctx.fillText("QML酷毙了", 30, 60);
+ ctx.restore();
+ }
+ }
+
+ Rectangle {
+ id:controls
+ width:360
+ height:160
+ Column {
+ spacing:3
+ Slider {id:lineWidthCtrl; width:300; height:30; min:1; max:10; init:2; name:"Line width"}
+ Slider {id:scaleXCtrl; width:300; height:30; min:0.1; max:10; init:1; name:"ScaleX"}
+ Slider {id:scaleYCtrl; width:300; height:30; min:0.1; max:10; init:1; name:"ScaleY"}
+ Slider {id:rotateCtrl; width:300; height:30; min:0; max:Math.PI*2; init:0; name:"Rotate"}
+ Slider {id:alphaCtrl; width:300; height:30; min:0; max:1; init:1; name:"Alpha"}
+ }
+ }
+ }
+}