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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
import QtQuick.Controls.Styles 1.4
CircularGaugeStyle {
id: cpugauge
tickmarkInset: toPixels(0.04)
minorTickmarkInset: tickmarkInset
labelStepSize: 20
labelInset: toPixels(0.23)
property real xCenter: outerRadius
property real yCenter: outerRadius
property real needleLength: outerRadius - tickmarkInset * 1.25
property real needleTipWidth: toPixels(0.02)
property real needleBaseWidth: toPixels(0.06)
property bool halfGauge: false
function toPixels(percentage) {
return percentage * outerRadius;
}
function degToRad(degrees) {
return degrees * (Math.PI / 180);
}
function radToDeg(radians) {
return radians * (180 / Math.PI);
}
function paintBackground(ctx) {
if (halfGauge) {
ctx.beginPath();
ctx.rect(0, 0, ctx.canvas.width, ctx.canvas.height / 2);
ctx.clip();
}
ctx.beginPath();
ctx.fillStyle = "black";
ctx.ellipse(0, 0, ctx.canvas.width, ctx.canvas.height);
ctx.fill();
ctx.beginPath();
ctx.lineWidth = tickmarkInset;
ctx.strokeStyle = "black";
ctx.arc(xCenter, yCenter, outerRadius - ctx.lineWidth / 2, outerRadius - ctx.lineWidth / 2, 0, Math.PI * 2);
ctx.stroke();
ctx.beginPath();
ctx.lineWidth = tickmarkInset / 2;
ctx.strokeStyle = "#222";
ctx.arc(xCenter, yCenter, outerRadius - ctx.lineWidth / 2, outerRadius - ctx.lineWidth / 2, 0, Math.PI * 2);
ctx.stroke();
ctx.beginPath();
var gradient = ctx.createRadialGradient(xCenter, yCenter, outerRadius * 0.8, xCenter, yCenter, outerRadius);
gradient.addColorStop(0, Qt.rgba(1, 1, 1, 0));
gradient.addColorStop(0.7, Qt.rgba(1, 1, 1, 0.13));
gradient.addColorStop(1, Qt.rgba(1, 1, 1, 1));
ctx.fillStyle = gradient;
ctx.arc(xCenter, yCenter, outerRadius - tickmarkInset, outerRadius - tickmarkInset, 0, Math.PI * 2);
ctx.fill();
}
background: Canvas {
onPaint: {
var ctx = getContext("2d");
ctx.reset();
paintBackground(ctx);
}
}
needle: Canvas {
implicitWidth: needleBaseWidth
implicitHeight: needleLength
property real xCenter: width / 2
property real yCenter: height / 2
onPaint: {
var ctx = getContext("2d");
ctx.reset();
ctx.beginPath();
ctx.moveTo(xCenter, height);
ctx.lineTo(xCenter - needleBaseWidth / 2, height - needleBaseWidth / 2);
ctx.lineTo(xCenter - needleTipWidth / 2, 0);
ctx.lineTo(xCenter, yCenter - needleLength);
ctx.lineTo(xCenter, 0);
ctx.closePath();
ctx.fillStyle = Qt.rgba(0.66, 0, 0, 0.66);
ctx.fill();
ctx.beginPath();
ctx.moveTo(xCenter, height)
ctx.lineTo(width, height - needleBaseWidth / 2);
ctx.lineTo(xCenter + needleTipWidth / 2, 0);
ctx.lineTo(xCenter, 0);
ctx.closePath();
ctx.fillStyle = Qt.lighter(Qt.rgba(0.66, 0, 0, 0.66));
ctx.fill();
}
}
foreground: null
}
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