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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.2
Item {
// This enum is actually keyboard-related, but it serves its purpose
// as an indication of direction for us.
property int direction: Qt.LeftArrow
property bool on: false
property bool flashing: false
scale: direction === Qt.LeftArrow ? 1 : -1
Timer {
id: flashTimer
interval: 500
running: on
repeat: true
onTriggered: flashing = !flashing
}
function paintOutlinePath(ctx) {
ctx.beginPath();
ctx.moveTo(0, height * 0.5);
ctx.lineTo(0.6 * width, 0);
ctx.lineTo(0.6 * width, height * 0.28);
ctx.lineTo(width, height * 0.28);
ctx.lineTo(width, height * 0.72);
ctx.lineTo(0.6 * width, height * 0.72);
ctx.lineTo(0.6 * width, height);
ctx.lineTo(0, height * 0.5);
}
Canvas {
id: backgroundCanvas
anchors.fill: parent
onPaint: {
var ctx = getContext("2d");
ctx.reset();
paintOutlinePath(ctx);
ctx.lineWidth = 1;
ctx.strokeStyle = "lightgrey";
ctx.stroke();
}
}
Canvas {
id: foregroundCanvas
anchors.fill: parent
visible: on && flashing
onPaint: {
var ctx = getContext("2d");
ctx.reset();
paintOutlinePath(ctx);
ctx.fillStyle = "green";
ctx.fill();
}
}
}
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