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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import QtQuick
import QtQuick.Controls
import "../"
Item {
id: root
width: 320
height: 480
Column {
spacing: 5
anchors {
fill: root
topMargin: 12
}
Label {
anchors.horizontalCenter: parent.horizontalCenter
text: qsTr("Squircle with Clip")
color: Qt.lighter(palette.text)
font {
pointSize: 24
bold: true
}
}
Canvas {
id: canvas
readonly property color strokeStyle: Qt.darker(fillStyle, 1.2)
readonly property color fillStyle: "#14aaff" // green
readonly property int lineWidth: 2
readonly property alias nSize: nCtrl.value
readonly property alias radius: rCtrl.value
readonly property alias fill: toggleFillCheckBox.checked
readonly property alias stroke: toggleStrokeCheckBox.checked
readonly property real px: width / 2
readonly property real py: height / 2 + 20
readonly property real alpha: 1.0
readonly property string imagefile: "../contents/qt-logo.png"
width: root.width
height: parent.height - controls.height
antialiasing: true
Component.onCompleted: loadImage(canvas.imagefile)
onRadiusChanged: requestPaint()
onLineWidthChanged: requestPaint()
onNSizeChanged: requestPaint()
onFillChanged: requestPaint()
onStrokeChanged: requestPaint()
onImageLoaded: requestPaint()
onPaint: function() {
let ctx = canvas.getContext("2d")
const N = Math.abs(canvas.nSize)
const R = canvas.radius
const M = Math.max(0.00000000001, Math.min(N, 100))
ctx.save()
ctx.globalAlpha = canvas.alpha
ctx.fillStyle = "white"
ctx.fillRect(0, 0, canvas.width, canvas.height)
ctx.strokeStyle = canvas.strokeStyle
ctx.fillStyle = canvas.fillStyle
ctx.lineWidth = canvas.lineWidth
ctx.beginPath()
let i, x, y
for (i = 0; i < (2 * R + 1); i++) {
x = Math.round(i - R) + canvas.px
y = Math.round(Math.pow(Math.abs(Math.pow(R, M) - Math.pow(Math.abs(i - R), M)), 1 / M)) + canvas.py
if (i === 0)
ctx.moveTo(x, y)
else
ctx.lineTo(x, y)
}
for (i = (2 * R); i < (4 * R + 1); i++) {
x = Math.round(3 * R - i) + canvas.px
y = Math.round(-Math.pow(Math.abs(Math.pow(R, M) - Math.pow(Math.abs(3 * R - i), M)), 1 / M)) + canvas.py
ctx.lineTo(x, y)
}
ctx.closePath()
if (canvas.stroke) {
ctx.stroke()
}
if (canvas.fill) {
ctx.fill()
}
//! [0]
ctx.clip()
ctx.drawImage(canvas.imagefile, 0, 0)
//! [0]
ctx.restore()
}
}
}
Column {
id: controls
anchors {
bottom: parent.bottom
bottomMargin: 12
}
LabeledSlider {
id: nCtrl
name: qsTr("N")
width: root.width
min: 1
max: 10
value: 4
}
LabeledSlider {
id: rCtrl
name: qsTr("Radius")
width: root.width
min: 30
max: 180
value: 80
}
Row {
CheckBox {
id: toggleFillCheckBox
checked: true
text: qsTr("Toggle fill")
}
CheckBox {
id: toggleStrokeCheckBox
text: qsTr("Toggle stroke")
}
}
}
}
|
