实例介绍
【实例简介】基于Qt5.6.2的汽车仪表盘demo,随机时速表和转速表,左转向灯
【实例截图】
【核心代码】
/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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.Window 2.1 import QtQuick.Controls 1.4 import QtQuick.Controls.Styles 1.4 import QtQuick.Extras 1.4 Window { id: root visible: true width: 1024 height: 600 color: "#161616" title: "Qt Quick Extras Demo" ValueSource { id: valueSource } // Dashboards are typically in a landscape orientation, so we need to ensure // our height is never greater than our width. Item { id: container width: root.width height: Math.min(root.width, root.height) anchors.centerIn: parent Row { id: gaugeRow spacing: container.width * 0.02 anchors.centerIn: parent TurnIndicator { id: leftIndicator anchors.verticalCenter: parent.verticalCenter width: height height: container.height * 0.1 - gaugeRow.spacing direction: Qt.LeftArrow on: valueSource.turnSignal == Qt.LeftArrow } Item { width: height height: container.height * 0.25 - gaugeRow.spacing anchors.verticalCenter: parent.verticalCenter CircularGauge { id: fuelGauge value: valueSource.fuel maximumValue: 1 y: parent.height / 2 - height / 2 - container.height * 0.01 width: parent.width height: parent.height * 0.7 style: IconGaugeStyle { id: fuelGaugeStyle icon: "qrc:/images/fuel-icon.png" minWarningColor: Qt.rgba(0.5, 0, 0, 1) tickmarkLabel: Text { color: "white" visible: styleData.value === 0 || styleData.value === 1 font.pixelSize: fuelGaugeStyle.toPixels(0.225) text: styleData.value === 0 ? "E" : (styleData.value === 1 ? "F" : "") } } } CircularGauge { value: valueSource.temperature maximumValue: 1 width: parent.width height: parent.height * 0.7 y: parent.height / 2 container.height * 0.01 style: IconGaugeStyle { id: tempGaugeStyle icon: "qrc:/images/temperature-icon.png" maxWarningColor: Qt.rgba(0.5, 0, 0, 1) tickmarkLabel: Text { color: "white" visible: styleData.value === 0 || styleData.value === 1 font.pixelSize: tempGaugeStyle.toPixels(0.225) text: styleData.value === 0 ? "C" : (styleData.value === 1 ? "H" : "") } } } } CircularGauge { id: speedometer value: valueSource.kph anchors.verticalCenter: parent.verticalCenter maximumValue: 280 // We set the width to the height, because the height will always be // the more limited factor. Also, all circular controls letterbox // their contents to ensure that they remain circular. However, we // don't want to extra space on the left and right of our gauges, // because they're laid out horizontally, and that would create // large horizontal gaps between gauges on wide screens. width: height height: container.height * 0.5 style: DashboardGaugeStyle {} } CircularGauge { id: tachometer width: height height: container.height * 0.25 - gaugeRow.spacing value: valueSource.rpm maximumValue: 8 anchors.verticalCenter: parent.verticalCenter style: TachometerStyle {} } TurnIndicator { id: rightIndicator anchors.verticalCenter: parent.verticalCenter width: height height: container.height * 0.1 - gaugeRow.spacing direction: Qt.RightArrow on: valueSource.turnSignal == Qt.RightArrow } } } }
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