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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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);
}
}
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