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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
//![0]
import QtQuick
Canvas {
id: canvas
width: 800
height: 600
antialiasing: true
renderTarget: Canvas.FramebufferObject
property var points: []
onPaint: {
if (points.length < 2)
return
var ctx = canvas.getContext('2d');
ctx.save()
ctx.strokeStyle = stylusHandler.active ? "blue" : "white"
ctx.lineCap = "round"
ctx.beginPath()
ctx.moveTo(points[0].x, points[0].y)
for (var i = 1; i < points.length; i++)
ctx.lineTo(points[i].x, points[i].y)
ctx.lineWidth = 3
ctx.stroke()
points = points.slice(points.length - 2, 1)
ctx.restore()
}
PointHandler {
id: stylusHandler
acceptedPointerTypes: PointerDevice.Pen
onPointChanged: {
canvas.points.push(point.position)
canvas.requestPaint()
}
}
PointHandler {
id: eraserHandler
acceptedPointerTypes: PointerDevice.Eraser
onPointChanged: {
canvas.points.push(point.position)
canvas.requestPaint()
}
}
Rectangle {
width: 10; height: 10
color: stylusHandler.active ? "green" : eraserHandler.active ? "red" : "beige"
}
}
//![0]
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