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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+import QtQuick 2.10
+
+Canvas {
+ width: 100
+ height: 100
+
+ function drawCornerMarkers(ctx)
+ {
+ var cornerMarkerSize = 10;
+
+ ctx.beginPath();
+
+ // top left
+ ctx.moveTo(0, 0.5);
+ ctx.lineTo(cornerMarkerSize, 0.5);
+ ctx.moveTo(0.5, 0);
+ ctx.lineTo(0.5, cornerMarkerSize);
+
+ // top right
+ ctx.moveTo(width - cornerMarkerSize, 0.5);
+ ctx.lineTo(width, 0.5);
+ ctx.moveTo(width - 0.5, 0);
+ ctx.lineTo(width - 0.5, cornerMarkerSize);
+
+ // bottom left
+ ctx.moveTo(0, height - 0.5);
+ ctx.lineTo(cornerMarkerSize, height - 0.5);
+ ctx.moveTo(0.5, height - cornerMarkerSize);
+ ctx.lineTo(0.5, height);
+
+ // bottom right
+ ctx.moveTo(width - cornerMarkerSize, height - 0.5);
+ ctx.lineTo(width, height - 0.5);
+ ctx.moveTo(width - 0.5, height - cornerMarkerSize);
+ ctx.lineTo(width - 0.5, height);
+
+ ctx.stroke();
+ }
+
+ function drawMetrics(ctx)
+ {
+ ctx.font = '9px sans-serif';
+
+ // top left
+ ctx.textAlign = "left";
+ ctx.textBaseline = "top";
+ ctx.fillStyle = Qt.rgba(0, 0, 1, 1);
+ ctx.fillText(x + '|' + y, 1, 1);
+
+ // size
+ ctx.textAlign = "center";
+ ctx.textBaseline = "middle";
+ ctx.fillText(width + 'x' + height, width / 2, height / 2);
+
+ // bottom right
+ ctx.textAlign = "right";
+ ctx.textBaseline = "bottom";
+ ctx.fillText((x + width) + '|' + (y + height), width - 1, height - 1);
+ }
+
+ onPaint: {
+ var ctx = getContext("2d");
+
+ ctx.fillStyle = Qt.rgba(1, 0, 0, 0.2);
+ ctx.fillRect(0, 0, width, height);
+
+ drawCornerMarkers(ctx);
+ drawMetrics(ctx);
+ }
+}