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-rw-r--r--src/quick/doc/snippets/pointerHandlers/pointHandlerCanvasDrawing.qml54
1 files changed, 54 insertions, 0 deletions
diff --git a/src/quick/doc/snippets/pointerHandlers/pointHandlerCanvasDrawing.qml b/src/quick/doc/snippets/pointerHandlers/pointHandlerCanvasDrawing.qml
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+++ b/src/quick/doc/snippets/pointerHandlers/pointHandlerCanvasDrawing.qml
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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]