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// 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: 6
anchors {
fill: parent
topMargin: 12
}
Label {
anchors.horizontalCenter: parent.horizontalCenter
text: qsTr("Squircles")
color: Qt.lighter(palette.text)
font {
pointSize: 24
bold: true
}
}
Image {
anchors.horizontalCenter: parent.horizontalCenter
source: "squircle.png"
width: 250
height: 25
}
Canvas {
id: canvas
readonly property color strokeStyle: Qt.darker(fillStyle, 1.2)
readonly property color fillStyle: "#6400aa"
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 + 10
readonly property real alpha: 1.0
width: root.width
height: parent.height - controls.height
antialiasing: true
onRadiusChanged: requestPaint()
onLineWidthChanged: requestPaint()
onNSizeChanged: requestPaint()
onFillChanged: requestPaint()
onStrokeChanged: 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()
}
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: 2
}
LabeledSlider {
id: rCtrl
name: qsTr("Radius")
width: root.width
min: 30
max: 180
value: 60
}
Row {
CheckBox {
id: toggleFillCheckBox
text: qsTr("Toggle fill")
}
CheckBox {
id: toggleStrokeCheckBox
checked: true
text: qsTr("Toggle stroke")
}
}
}
}
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