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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: container
width: 320
height: 480
Column {
spacing: 6
anchors.fill: parent
anchors.topMargin: 12
Label {
font.pointSize: 24
font.bold: true
text: "Squircles"
anchors.horizontalCenter: parent.horizontalCenter
color: "#777"
}
Image {
anchors.horizontalCenter: parent.horizontalCenter
source: "squircle.png"
width: 250
height: 25
}
Canvas {
id: canvas
width: 320
height: 250
antialiasing: true
property color strokeStyle: Qt.darker(fillStyle, 1.2)
property color fillStyle: "#6400aa"
property int lineWidth: 2
property int nSize: nCtrl.value
property real radius: rCtrl.value
property bool fill: true
property bool stroke: false
property real px: width/2
property real py: height/2 + 10
property real alpha: 1.0
onRadiusChanged: requestPaint();
onLineWidthChanged: requestPaint();
onNSizeChanged: requestPaint();
onFillChanged: requestPaint();
onStrokeChanged: requestPaint();
onPaint: squircle();
function squircle() {
var ctx = canvas.getContext("2d");
var N = canvas.nSize;
var R = canvas.radius;
N=Math.abs(N);
var M=N;
if (N>100) M=100;
if (N<0.00000000001) M=0.00000000001;
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();
var i = 0, 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 {
anchors.bottom: parent.bottom
anchors.bottomMargin: 12
LabeledSlider {id: nCtrl ; min: 1 ; max: 10 ; init: 2 ; name: "N"; width: container.width}
LabeledSlider {id: rCtrl ; min: 30 ; max: 180 ; init: 60 ; name: "Radius"; width: container.width}
}
}
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