<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- qmlmultigraph.qdoc -->
<title>Qt Quick 2 Multiple Graphs Example | Qt Data Visualization 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="qtdatavisualization-index.html">Qt Data Visualization</a></td><td >Qt Quick 2 Multiple Graphs Example</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="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#running-the-example">Running the Example</a></li>
<li class="level1"><a href="#multiple-graphs">Multiple Graphs</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">Qt Quick 2 Multiple Graphs Example</h1>
<span class="subtitle"></span>
<!-- $$$qmlmultigraph-description -->
<div class="descr"> <a name="details"></a>
<p>The Qt Quick 2 multiple graphs example demonstrates using multiple graphs in single window.</p>
<p class="centerAlign"><img src="images/qmlmultigraph-example.png" alt="" /></p><p>The interesting thing about this example is demonstrating that multiple graphs can be used simultaneously, so most functionality is not explained in detail. For more detailed QML example documentation, see <a href="qtdatavisualization-qmlscatter-example.html">Qt Quick 2 Scatter Example</a>.</p>
<a name="running-the-example"></a>
<h2 id="running-the-example">Running the Example</h2>
<p>To run the example from Qt Creator, open the <b>Welcome</b> mode and select the example from <b>Examples</b>. For more information, visit Building and Running an Example.</p>
<a name="multiple-graphs"></a>
<h2 id="multiple-graphs">Multiple Graphs</h2>
<p>Using multiple graphs in a single application doesn't require anything special, simply define and position the graphs as normal. In this example the graphs are shown in a 2 x 2 grid with <code>GridLayout</code>:</p>
<pre class="qml">
<span class="type">GridLayout</span> {
<span class="name">id</span>: <span class="name">gridLayout</span>
<span class="name">columns</span>: <span class="number">2</span>
<span class="name">Layout</span>.fillHeight: <span class="number">true</span>
<span class="name">Layout</span>.fillWidth: <span class="number">true</span>
<span class="name">anchors</span>.top: <span class="name">mainView</span>.<span class="name">top</span>
<span class="name">anchors</span>.bottom: <span class="name">mainView</span>.<span class="name">bottom</span>
<span class="name">anchors</span>.left: <span class="name">mainView</span>.<span class="name">left</span>
<span class="name">anchors</span>.right: <span class="name">mainView</span>.<span class="name">right</span>
<span class="type">Rectangle</span> {
<span class="name">Layout</span>.fillHeight: <span class="number">true</span>
<span class="name">Layout</span>.fillWidth: <span class="number">true</span>
<span class="name">border</span>.color: <span class="name">surfaceGraph</span>.<span class="name">theme</span>.<span class="name">gridLineColor</span>
<span class="name">border</span>.width: <span class="number">2</span>
<span class="type"><a href="qml-qtdatavisualization-surface3d.html">Surface3D</a></span> {
<span class="name">id</span>: <span class="name">surfaceGraph</span>
<span class="name">anchors</span>.fill: <span class="name">parent</span>
<span class="name">anchors</span>.margins: <span class="name">parent</span>.<span class="name">border</span>.<span class="name">width</span>
<span class="name">theme</span>: <span class="name">Theme3D</span> {
<span class="name">type</span>: <span class="name">Theme3D</span>.<span class="name">ThemePrimaryColors</span>
<span class="name">font</span>.pointSize: <span class="number">60</span>
}
<span class="name">scene</span>.activeCamera.cameraPreset: <span class="name">Camera3D</span>.<span class="name">CameraPresetIsometricLeftHigh</span>
<span class="type"><a href="qml-qtdatavisualization-surface3dseries.html">Surface3DSeries</a></span> {
<span class="name">itemLabelFormat</span>: <span class="string">"Pop density at (@xLabel N, @zLabel E): @yLabel"</span>
<span class="type"><a href="qml-qtdatavisualization-itemmodelsurfacedataproxy.html">ItemModelSurfaceDataProxy</a></span> {
<span class="name">itemModel</span>: <span class="name">data</span>.<span class="name">sharedData</span>
<span class="comment">// The surface data points are not neatly lined up in rows and columns,</span>
<span class="comment">// so we define explicit row and column roles.</span>
<span class="name">rowRole</span>: <span class="string">"row"</span>
<span class="name">columnRole</span>: <span class="string">"col"</span>
<span class="name">xPosRole</span>: <span class="string">"latitude"</span>
<span class="name">zPosRole</span>: <span class="string">"longitude"</span>
<span class="name">yPosRole</span>: <span class="string">"pop_density"</span>
}
}
}
}
<span class="comment">// We'll use one grid cell for buttons</span>
<span class="type">Rectangle</span> {
<span class="name">Layout</span>.fillHeight: <span class="number">true</span>
<span class="name">Layout</span>.fillWidth: <span class="number">true</span>
<span class="type">GridLayout</span> {
<span class="name">anchors</span>.right: <span class="name">parent</span>.<span class="name">right</span>
<span class="name">anchors</span>.left: <span class="name">parent</span>.<span class="name">left</span>
<span class="name">anchors</span>.top: <span class="name">parent</span>.<span class="name">top</span>
<span class="name">anchors</span>.bottom: <span class="name">parent</span>.<span class="name">bottom</span>
<span class="name">columns</span>: <span class="number">2</span>
<span class="type">NewButton</span> {
<span class="name">Layout</span>.minimumWidth: <span class="name">parent</span>.<span class="name">width</span> <span class="operator">/</span> <span class="number">2</span>
<span class="name">Layout</span>.fillHeight: <span class="number">true</span>
<span class="name">Layout</span>.fillWidth: <span class="number">true</span>
<span class="name">text</span>: <span class="string">"Clear Selections"</span>
<span class="name">onClicked</span>: <span class="name">clearSelections</span>() <span class="comment">// call a helper function to keep button itself simpler</span>
}
<span class="type">NewButton</span> {
<span class="name">Layout</span>.minimumWidth: <span class="name">parent</span>.<span class="name">width</span> <span class="operator">/</span> <span class="number">2</span>
<span class="name">Layout</span>.fillHeight: <span class="number">true</span>
<span class="name">Layout</span>.fillWidth: <span class="number">true</span>
<span class="name">text</span>: <span class="string">"Quit"</span>
<span class="name">onClicked</span>: <span class="name">Qt</span>.<span class="name">quit</span>(<span class="number">0</span>);
}
<span class="type">NewButton</span> {
<span class="name">Layout</span>.fillHeight: <span class="number">true</span>
<span class="name">Layout</span>.fillWidth: <span class="number">true</span>
<span class="name">text</span>: <span class="string">"Reset Cameras"</span>
<span class="name">onClicked</span>: <span class="name">resetCameras</span>() <span class="comment">// call a helper function to keep button itself simpler</span>
}
<span class="type">NewButton</span> {
<span class="name">Layout</span>.fillHeight: <span class="number">true</span>
<span class="name">Layout</span>.fillWidth: <span class="number">true</span>
<span class="name">text</span>: <span class="string">"Toggle Mesh Styles"</span>
<span class="name">onClicked</span>: <span class="name">toggleMeshStyle</span>() <span class="comment">// call a helper function to keep button itself simpler</span>
}
}
}
<span class="type">Rectangle</span> {
<span class="name">Layout</span>.fillHeight: <span class="number">true</span>
<span class="name">Layout</span>.fillWidth: <span class="number">true</span>
<span class="name">border</span>.color: <span class="name">scatterGraph</span>.<span class="name">theme</span>.<span class="name">gridLineColor</span>
<span class="name">border</span>.width: <span class="number">2</span>
<span class="type"><a href="qml-qtdatavisualization-scatter3d.html">Scatter3D</a></span> {
<span class="name">id</span>: <span class="name">scatterGraph</span>
<span class="name">anchors</span>.fill: <span class="name">parent</span>
<span class="name">anchors</span>.margins: <span class="name">parent</span>.<span class="name">border</span>.<span class="name">width</span>
<span class="name">theme</span>: <span class="name">Theme3D</span> {
<span class="name">type</span>: <span class="name">Theme3D</span>.<span class="name">ThemeDigia</span>
<span class="name">font</span>.pointSize: <span class="number">60</span>
}
<span class="name">scene</span>.activeCamera.cameraPreset: <span class="name">Camera3D</span>.<span class="name">CameraPresetIsometricLeftHigh</span>
<span class="type"><a href="qml-qtdatavisualization-scatter3dseries.html">Scatter3DSeries</a></span> {
<span class="name">itemLabelFormat</span>: <span class="string">"Pop density at (@xLabel N, @zLabel E): @yLabel"</span>
<span class="type"><a href="qml-qtdatavisualization-itemmodelscatterdataproxy.html">ItemModelScatterDataProxy</a></span> {
<span class="name">itemModel</span>: <span class="name">data</span>.<span class="name">sharedData</span>
<span class="comment">// Mapping model roles to scatter series item coordinates.</span>
<span class="name">xPosRole</span>: <span class="string">"latitude"</span>
<span class="name">zPosRole</span>: <span class="string">"longitude"</span>
<span class="name">yPosRole</span>: <span class="string">"pop_density"</span>
}
}
}
}
<span class="type">Rectangle</span> {
<span class="name">Layout</span>.fillHeight: <span class="number">true</span>
<span class="name">Layout</span>.fillWidth: <span class="number">true</span>
<span class="name">border</span>.color: <span class="name">barGraph</span>.<span class="name">theme</span>.<span class="name">gridLineColor</span>
<span class="name">border</span>.width: <span class="number">2</span>
<span class="type"><a href="qml-qtdatavisualization-bars3d.html">Bars3D</a></span> {
<span class="name">id</span>: <span class="name">barGraph</span>
<span class="name">anchors</span>.fill: <span class="name">parent</span>
<span class="name">anchors</span>.margins: <span class="name">parent</span>.<span class="name">border</span>.<span class="name">width</span>
<span class="name">theme</span>: <span class="name">Theme3D</span> {
<span class="name">type</span>: <span class="name">Theme3D</span>.<span class="name">ThemeQt</span>
<span class="name">font</span>.pointSize: <span class="number">60</span>
}
<span class="name">selectionMode</span>: <span class="name">AbstractGraph3D</span>.<span class="name">SelectionItemAndRow</span> <span class="operator">|</span> <span class="name">AbstractGraph3D</span>.<span class="name">SelectionSlice</span>
<span class="name">scene</span>.activeCamera.cameraPreset: <span class="name">Camera3D</span>.<span class="name">CameraPresetIsometricLeftHigh</span>
<span class="type"><a href="qml-qtdatavisualization-bar3dseries.html">Bar3DSeries</a></span> {
<span class="name">itemLabelFormat</span>: <span class="string">"@seriesName: @valueLabel"</span>
<span class="name">name</span>: <span class="string">"Population density"</span>
<span class="type"><a href="qml-qtdatavisualization-itemmodelbardataproxy.html">ItemModelBarDataProxy</a></span> {
<span class="name">itemModel</span>: <span class="name">data</span>.<span class="name">sharedData</span>
<span class="comment">// Mapping model roles to bar series rows, columns, and values.</span>
<span class="name">rowRole</span>: <span class="string">"row"</span>
<span class="name">columnRole</span>: <span class="string">"col"</span>
<span class="name">valueRole</span>: <span class="string">"pop_density"</span>
}
}
}
}
}
</pre>
<p>Each graph has a parent <code>Rectangle</code> item to provide it with a border.</p>
<p>Note that one of the grid cells is used for buttons in an another <code>GridLayout</code>.</p>
<p>Files:</p>
<ul>
<li><a href="qtdatavisualization-qmlmultigraph-qml-qmlmultigraph-data-qml.html">qmlmultigraph/qml/qmlmultigraph/Data.qml</a></li>
<li><a href="qtdatavisualization-qmlmultigraph-qml-qmlmultigraph-newbutton-qml.html">qmlmultigraph/qml/qmlmultigraph/NewButton.qml</a></li>
<li><a href="qtdatavisualization-qmlmultigraph-qml-qmlmultigraph-main-qml.html">qmlmultigraph/qml/qmlmultigraph/main.qml</a></li>
<li><a href="qtdatavisualization-qmlmultigraph-main-cpp.html">qmlmultigraph/main.cpp</a></li>
<li><a href="qtdatavisualization-qmlmultigraph-qmlmultigraph-pro.html">qmlmultigraph/qmlmultigraph.pro</a></li>
<li><a href="qtdatavisualization-qmlmultigraph-qmlmultigraph-qrc.html">qmlmultigraph/qmlmultigraph.qrc</a></li>
</ul>
</div>
<!-- @@@qmlmultigraph -->
</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>
