<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>ScopeView.qml Example File | Qt Charts 5.9</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.9</td><td ><a href="qtcharts-index.html">Qt Charts</a></td><td ><a href="qtcharts-qmloscilloscope-example.html">Qml Oscilloscope</a></td><td >ScopeView.qml Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">ScopeView.qml Example File</h1> <span class="subtitle">qmloscilloscope/qml/qmloscilloscope/ScopeView.qml</span> <!-- $$$qmloscilloscope/qml/qmloscilloscope/ScopeView.qml-description --> <div class="descr"> <a name="details"></a> <pre class="qml"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the Qt Charts module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:GPL$ ** 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 or (at your option) any later version ** approved by the KDE Free Qt Foundation. The licenses are as published by ** the Free Software Foundation and appearing in the file LICENSE.GPL3 ** 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. ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> import QtQuick 2.0 import QtCharts 2.1 <span class="type"><a href="qml-qtcharts-chartview.html">ChartView</a></span> { <span class="name">id</span>: <span class="name">chartView</span> <span class="name">animationOptions</span>: <span class="name">ChartView</span>.<span class="name">NoAnimation</span> <span class="name">theme</span>: <span class="name">ChartView</span>.<span class="name">ChartThemeDark</span> property <span class="type">bool</span> <span class="name">openGL</span>: <span class="number">true</span> property <span class="type">bool</span> <span class="name">openGLSupported</span>: <span class="number">true</span> <span class="name">onOpenGLChanged</span>: { <span class="keyword">if</span> (<span class="name">openGLSupported</span>) { <span class="name">series</span>(<span class="string">"signal 1"</span>).<span class="name">useOpenGL</span> <span class="operator">=</span> <span class="name">openGL</span>; <span class="name">series</span>(<span class="string">"signal 2"</span>).<span class="name">useOpenGL</span> <span class="operator">=</span> <span class="name">openGL</span>; } } <span class="name">Component</span>.onCompleted: { <span class="keyword">if</span> (!<span class="name">series</span>(<span class="string">"signal 1"</span>).<span class="name">useOpenGL</span>) { <span class="name">openGLSupported</span> <span class="operator">=</span> <span class="number">false</span> <span class="name">openGL</span> <span class="operator">=</span> <span class="number">false</span> } } <span class="type"><a href="qml-qtcharts-valueaxis.html">ValueAxis</a></span> { <span class="name">id</span>: <span class="name">axisY1</span> <span class="name">min</span>: -<span class="number">1</span> <span class="name">max</span>: <span class="number">4</span> } <span class="type"><a href="qml-qtcharts-valueaxis.html">ValueAxis</a></span> { <span class="name">id</span>: <span class="name">axisY2</span> <span class="name">min</span>: -<span class="number">10</span> <span class="name">max</span>: <span class="number">5</span> } <span class="type"><a href="qml-qtcharts-valueaxis.html">ValueAxis</a></span> { <span class="name">id</span>: <span class="name">axisX</span> <span class="name">min</span>: <span class="number">0</span> <span class="name">max</span>: <span class="number">1024</span> } <span class="type"><a href="qml-qtcharts-lineseries.html">LineSeries</a></span> { <span class="name">id</span>: <span class="name">lineSeries1</span> <span class="name">name</span>: <span class="string">"signal 1"</span> <span class="name">axisX</span>: <span class="name">axisX</span> <span class="name">axisY</span>: <span class="name">axisY1</span> <span class="name">useOpenGL</span>: <span class="name">chartView</span>.<span class="name">openGL</span> } <span class="type"><a href="qml-qtcharts-lineseries.html">LineSeries</a></span> { <span class="name">id</span>: <span class="name">lineSeries2</span> <span class="name">name</span>: <span class="string">"signal 2"</span> <span class="name">axisX</span>: <span class="name">axisX</span> <span class="name">axisYRight</span>: <span class="name">axisY2</span> <span class="name">useOpenGL</span>: <span class="name">chartView</span>.<span class="name">openGL</span> } <span class="type">Timer</span> { <span class="name">id</span>: <span class="name">refreshTimer</span> <span class="name">interval</span>: <span class="number">1</span> <span class="operator">/</span> <span class="number">60</span> <span class="operator">*</span> <span class="number">1000</span> <span class="comment">// 60 Hz</span> <span class="name">running</span>: <span class="number">true</span> <span class="name">repeat</span>: <span class="number">true</span> <span class="name">onTriggered</span>: { <span class="name">dataSource</span>.<span class="name">update</span>(<span class="name">chartView</span>.<span class="name">series</span>(<span class="number">0</span>)); <span class="name">dataSource</span>.<span class="name">update</span>(<span class="name">chartView</span>.<span class="name">series</span>(<span class="number">1</span>)); } } <span class="keyword">function</span> <span class="name">changeSeriesType</span>(<span class="name">type</span>) { <span class="name">chartView</span>.<span class="name">removeAllSeries</span>(); <span class="comment">// Create two new series of the correct type. Axis x is the same for both of the series,</span> <span class="comment">// but the series have their own y-axes to make it possible to control the y-offset</span> <span class="comment">// of the "signal sources".</span> <span class="keyword">if</span> (<span class="name">type</span> <span class="operator">==</span> <span class="string">"line"</span>) { var <span class="name">series1</span> = <span class="name">chartView</span>.<span class="name">createSeries</span>(<span class="name">ChartView</span>.<span class="name">SeriesTypeLine</span>, <span class="string">"signal 1"</span>, <span class="name">axisX</span>, <span class="name">axisY1</span>); <span class="name">series1</span>.<span class="name">useOpenGL</span> <span class="operator">=</span> <span class="name">chartView</span>.<span class="name">openGL</span> var <span class="name">series2</span> = <span class="name">chartView</span>.<span class="name">createSeries</span>(<span class="name">ChartView</span>.<span class="name">SeriesTypeLine</span>, <span class="string">"signal 2"</span>, <span class="name">axisX</span>, <span class="name">axisY2</span>); <span class="name">series2</span>.<span class="name">useOpenGL</span> <span class="operator">=</span> <span class="name">chartView</span>.<span class="name">openGL</span> } <span class="keyword">else</span> { var <span class="name">series1</span> = <span class="name">chartView</span>.<span class="name">createSeries</span>(<span class="name">ChartView</span>.<span class="name">SeriesTypeScatter</span>, <span class="string">"signal 1"</span>, <span class="name">axisX</span>, <span class="name">axisY1</span>); <span class="name">series1</span>.<span class="name">markerSize</span> <span class="operator">=</span> <span class="number">2</span>; <span class="name">series1</span>.<span class="name">borderColor</span> <span class="operator">=</span> <span class="string">"transparent"</span>; <span class="name">series1</span>.<span class="name">useOpenGL</span> <span class="operator">=</span> <span class="name">chartView</span>.<span class="name">openGL</span> var <span class="name">series2</span> = <span class="name">chartView</span>.<span class="name">createSeries</span>(<span class="name">ChartView</span>.<span class="name">SeriesTypeScatter</span>, <span class="string">"signal 2"</span>, <span class="name">axisX</span>, <span class="name">axisY2</span>); <span class="name">series2</span>.<span class="name">markerSize</span> <span class="operator">=</span> <span class="number">2</span>; <span class="name">series2</span>.<span class="name">borderColor</span> <span class="operator">=</span> <span class="string">"transparent"</span>; <span class="name">series2</span>.<span class="name">useOpenGL</span> <span class="operator">=</span> <span class="name">chartView</span>.<span class="name">openGL</span> } } <span class="keyword">function</span> <span class="name">createAxis</span>(<span class="name">min</span>, max) { <span class="comment">// The following creates a ValueAxis object that can be then set as a x or y axis for a series</span> <span class="keyword">return</span> <span class="name">Qt</span>.<span class="name">createQmlObject</span>(<span class="string">"import QtQuick 2.0; import QtCharts 2.0; ValueAxis { min: "</span> <span class="operator">+</span> <span class="name">min</span> <span class="operator">+</span> <span class="string">"; max: "</span> <span class="operator">+</span> <span class="name">max</span> <span class="operator">+</span> <span class="string">" }"</span>, <span class="name">chartView</span>); } <span class="keyword">function</span> <span class="name">setAnimations</span>(<span class="name">enabled</span>) { <span class="keyword">if</span> (<span class="name">enabled</span>) <span class="name">chartView</span>.<span class="name">animationOptions</span> <span class="operator">=</span> <span class="name">ChartView</span>.<span class="name">SeriesAnimations</span>; <span class="keyword">else</span> <span class="name">chartView</span>.<span class="name">animationOptions</span> <span class="operator">=</span> <span class="name">ChartView</span>.<span class="name">NoAnimation</span>; } <span class="keyword">function</span> <span class="name">changeRefreshRate</span>(<span class="name">rate</span>) { <span class="name">refreshTimer</span>.<span class="name">interval</span> <span class="operator">=</span> <span class="number">1</span> <span class="operator">/</span> <span class="name">Number</span>(<span class="name">rate</span>) <span class="operator">*</span> <span class="number">1000</span>; } } </pre> </div> <!-- @@@qmloscilloscope/qml/qmloscilloscope/ScopeView.qml --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>