1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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:320
height:480
Column {
spacing:5
anchors.fill:parent
Text { font.pointSize:15; text:"Bezier Curve"; anchors.horizontalCenter:parent.horizontalCenter}
Canvas {
id:canvas
width:320
height:280
property string strokeStyle:"red"
property string fillStyle:"red"
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
antialiasing: true
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} }
onLineWidthChanged:requestPaint();
onFillChanged:requestPaint();
onStrokeChanged:requestPaint();
onAlphaChanged:requestPaint();
onScaleXChanged:requestPaint();
onScaleYChanged:requestPaint();
onRotateChanged:requestPaint();
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);
//! [0]
ctx.beginPath();
ctx.moveTo(75,40);
ctx.bezierCurveTo(75,37,70,25,50,25);
ctx.bezierCurveTo(20,25,20,62.5,20,62.5);
ctx.bezierCurveTo(20,80,40,102,75,120);
ctx.bezierCurveTo(110,102,130,80,130,62.5);
ctx.bezierCurveTo(130,62.5,130,25,100,25);
ctx.bezierCurveTo(85,25,75,37,75,40);
ctx.closePath();
//! [0]
if (canvas.fill)
ctx.fill();
if (canvas.stroke)
ctx.stroke();
ctx.restore();
}
}
Rectangle {
id:controls
width:320
height:150
Column {
spacing:3
Slider {id:lineWidthCtrl; width:300; height:20; min:1; max:10; init:2; name:"Line width"}
Slider {id:scaleXCtrl; width:300; height:20; min:0.1; max:10; init:1; name:"ScaleX"}
Slider {id:scaleYCtrl; width:300; height:20; min:0.1; max:10; init:1; name:"ScaleY"}
Slider {id:rotateCtrl; width:300; height:20; min:0; max:Math.PI*2; init:0; name:"Rotate"}
Slider {id:alphaCtrl; width:300; height:20; min:0; max:1; init:1; name:"Alpha"}
}
}
}
}
|
