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7 ** This file is part of the examples of the Qt Toolkit.
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51 Text { font.pointSize:25; text:"Quadratic Curve"; anchors.horizontalCenter:parent.horizontalCenter}
57 property string strokeStyle:"steelblue"
58 property string fillStyle:"yellow"
59 property int lineWidth:lineWidthCtrl.value
60 property bool fill:true
61 property bool stroke:true
62 property real alpha:alphaCtrl.value
63 property real scaleX : scaleXCtrl.value
64 property real scaleY : scaleYCtrl.value
65 property real rotate : rotateCtrl.value
67 renderTarget:Canvas.Image
70 onLineWidthChanged:requestPaint();
71 onFillChanged:requestPaint();
72 onStrokeChanged:requestPaint();
73 onAlphaChanged:requestPaint();
74 onScaleXChanged:requestPaint();
75 onScaleYChanged:requestPaint();
76 onRotateChanged:requestPaint();
77 Behavior on scaleX { SpringAnimation { spring: 2; damping: 0.2; loops:Animation.Infinite } }
78 Behavior on scaleY { SpringAnimation { spring: 2; damping: 0.2; loops:Animation.Infinite} }
79 Behavior on rotate { SpringAnimation { spring: 2; damping: 0.2; loops:Animation.Infinite} }
82 var ctx = canvas.getContext('2d');
84 ctx.clearRect(0, 0, canvas.width, canvas.height);
85 ctx.globalAlpha = canvas.alpha;
86 ctx.strokeStyle = canvas.strokeStyle;
87 ctx.fillStyle = canvas.fillStyle;
88 ctx.lineWidth = canvas.lineWidth;
89 ctx.scale(canvas.scaleX, canvas.scaleY);
90 ctx.rotate(canvas.rotate);
93 ctx.quadraticCurveTo(25,25,25,62.5);
94 ctx.quadraticCurveTo(25,100,50,100);
95 ctx.quadraticCurveTo(50,120,30,125);
96 ctx.quadraticCurveTo(60,120,65,100);
97 ctx.quadraticCurveTo(125,100,125,62.5);
98 ctx.quadraticCurveTo(125,25,75,25);
106 ctx.fillStyle="green";
107 ctx.font = "Bold 15px";
109 // ctx.fillText("QML酷毙了", 30, 60); //BUG(in Linux):can't show multiple Chinese characters correctly.
110 ctx.fillText("QML酷 毙 了 !", 35, 65);
120 Slider {id:lineWidthCtrl; width:300; height:30; min:1; max:10; init:2; name:"Line width"}
121 Slider {id:scaleXCtrl; width:300; height:30; min:0.1; max:10; init:1; name:"ScaleX"}
122 Slider {id:scaleYCtrl; width:300; height:30; min:0.1; max:10; init:1; name:"ScaleY"}
123 Slider {id:rotateCtrl; width:300; height:30; min:0; max:Math.PI*2; init:0; name:"Rotate"}
124 Slider {id:alphaCtrl; width:300; height:30; min:0; max:1; init:1; name:"Alpha"}