<?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>custominputhandler.cpp Example File | Qt Data Visualization 5.12.2</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 5.12</td><td ><a href="qtdatavisualization-index.html">Qt Data Visualization</a></td><td ><a href="qtdatavisualization-texturesurface-example.html">Textured Surface Example</a></td><td >custominputhandler.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtdatavisualization-index.html">Qt Data Visualization | Commercial or GPLv3</a></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">custominputhandler.cpp Example File</h1> <span class="subtitle">texturesurface/custominputhandler.cpp</span> <!-- $$$texturesurface/custominputhandler.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the Qt Data Visualization 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> <span class="preprocessor">#include "custominputhandler.h"</span> <span class="preprocessor">#include <QtDataVisualization/Q3DCamera></span> <span class="preprocessor">#include <QtCore/qmath.h></span> CustomInputHandler<span class="operator">::</span>CustomInputHandler(QAbstract3DGraph <span class="operator">*</span>graph<span class="operator">,</span> <span class="type">QObject</span> <span class="operator">*</span>parent) : <span class="type"><a href="q3dinputhandler.html">Q3DInputHandler</a></span>(parent)<span class="operator">,</span> m_highlight(<span class="number">0</span>)<span class="operator">,</span> m_mousePressed(<span class="keyword">false</span>)<span class="operator">,</span> m_state(StateNormal)<span class="operator">,</span> m_axisX(<span class="number">0</span>)<span class="operator">,</span> m_axisZ(<span class="number">0</span>)<span class="operator">,</span> m_speedModifier(<span class="number">20.0f</span>) { <span class="comment">// Connect to the item selection signal from graph</span> connect(graph<span class="operator">,</span> <span class="operator">&</span>QAbstract3DGraph<span class="operator">::</span>selectedElementChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>CustomInputHandler<span class="operator">::</span>handleElementSelected); } <span class="type">void</span> CustomInputHandler<span class="operator">::</span>mousePressEvent(<span class="type">QMouseEvent</span> <span class="operator">*</span>event<span class="operator">,</span> <span class="keyword">const</span> <span class="type">QPoint</span> <span class="operator">&</span>mousePos) { <span class="keyword">if</span> (<span class="type">Qt</span><span class="operator">::</span>LeftButton <span class="operator">=</span><span class="operator">=</span> event<span class="operator">-</span><span class="operator">></span>button()) { m_highlight<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">false</span>); m_mousePressed <span class="operator">=</span> <span class="keyword">true</span>; } <span class="type"><a href="q3dinputhandler.html">Q3DInputHandler</a></span><span class="operator">::</span>mousePressEvent(event<span class="operator">,</span> mousePos); } <span class="type">void</span> CustomInputHandler<span class="operator">::</span>wheelEvent(<span class="type">QWheelEvent</span> <span class="operator">*</span>event) { <span class="type">float</span> delta <span class="operator">=</span> <span class="type">float</span>(event<span class="operator">-</span><span class="operator">></span>delta()); m_axisXMinValue <span class="operator">+</span><span class="operator">=</span> delta; m_axisXMaxValue <span class="operator">-</span><span class="operator">=</span> delta; m_axisZMinValue <span class="operator">+</span><span class="operator">=</span> delta; m_axisZMaxValue <span class="operator">-</span><span class="operator">=</span> delta; checkConstraints(); <span class="type">float</span> y <span class="operator">=</span> (m_axisXMaxValue <span class="operator">-</span> m_axisXMinValue) <span class="operator">*</span> m_aspectRatio; m_axisX<span class="operator">-</span><span class="operator">></span>setRange(m_axisXMinValue<span class="operator">,</span> m_axisXMaxValue); m_axisY<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">100.0f</span><span class="operator">,</span> y); m_axisZ<span class="operator">-</span><span class="operator">></span>setRange(m_axisZMinValue<span class="operator">,</span> m_axisZMaxValue); } <span class="type">void</span> CustomInputHandler<span class="operator">::</span>mouseMoveEvent(<span class="type">QMouseEvent</span> <span class="operator">*</span>event<span class="operator">,</span> <span class="keyword">const</span> <span class="type">QPoint</span> <span class="operator">&</span>mousePos) { <span class="comment">// Check if we're trying to drag axis label</span> <span class="keyword">if</span> (m_mousePressed <span class="operator">&</span><span class="operator">&</span> m_state <span class="operator">!</span><span class="operator">=</span> StateNormal) { setPreviousInputPos(inputPosition()); setInputPosition(mousePos); handleAxisDragging(); } <span class="keyword">else</span> { <span class="type"><a href="q3dinputhandler.html">Q3DInputHandler</a></span><span class="operator">::</span>mouseMoveEvent(event<span class="operator">,</span> mousePos); } } <span class="type">void</span> CustomInputHandler<span class="operator">::</span>mouseReleaseEvent(<span class="type">QMouseEvent</span> <span class="operator">*</span>event<span class="operator">,</span> <span class="keyword">const</span> <span class="type">QPoint</span> <span class="operator">&</span>mousePos) { <span class="type"><a href="q3dinputhandler.html">Q3DInputHandler</a></span><span class="operator">::</span>mouseReleaseEvent(event<span class="operator">,</span> mousePos); m_mousePressed <span class="operator">=</span> <span class="keyword">false</span>; m_state <span class="operator">=</span> StateNormal; } <span class="type">void</span> CustomInputHandler<span class="operator">::</span>handleElementSelected(QAbstract3DGraph<span class="operator">::</span>ElementType type) { <span class="keyword">switch</span> (type) { <span class="keyword">case</span> QAbstract3DGraph<span class="operator">::</span>ElementAxisXLabel: m_state <span class="operator">=</span> StateDraggingX; <span class="keyword">break</span>; <span class="keyword">case</span> QAbstract3DGraph<span class="operator">::</span>ElementAxisZLabel: m_state <span class="operator">=</span> StateDraggingZ; <span class="keyword">break</span>; <span class="keyword">default</span>: m_state <span class="operator">=</span> StateNormal; <span class="keyword">break</span>; } } <span class="type">void</span> CustomInputHandler<span class="operator">::</span>handleAxisDragging() { <span class="type">float</span> distance <span class="operator">=</span> <span class="number">0.0f</span>; <span class="comment">// Get scene orientation from active camera</span> <span class="type">float</span> xRotation <span class="operator">=</span> scene()<span class="operator">-</span><span class="operator">></span>activeCamera()<span class="operator">-</span><span class="operator">></span>xRotation(); <span class="comment">// Calculate directional drag multipliers based on rotation</span> <span class="type">float</span> xMulX <span class="operator">=</span> qCos(qDegreesToRadians(xRotation)); <span class="type">float</span> xMulY <span class="operator">=</span> qSin(qDegreesToRadians(xRotation)); <span class="type">float</span> zMulX <span class="operator">=</span> qSin(qDegreesToRadians(xRotation)); <span class="type">float</span> zMulY <span class="operator">=</span> qCos(qDegreesToRadians(xRotation)); <span class="comment">// Get the drag amount</span> <span class="type">QPoint</span> move <span class="operator">=</span> inputPosition() <span class="operator">-</span> previousInputPos(); <span class="comment">// Adjust axes</span> <span class="keyword">switch</span> (m_state) { <span class="keyword">case</span> StateDraggingX: distance <span class="operator">=</span> (move<span class="operator">.</span>x() <span class="operator">*</span> xMulX <span class="operator">-</span> move<span class="operator">.</span>y() <span class="operator">*</span> xMulY) <span class="operator">*</span> m_speedModifier; m_axisXMinValue <span class="operator">-</span><span class="operator">=</span> distance; m_axisXMaxValue <span class="operator">-</span><span class="operator">=</span> distance; <span class="keyword">if</span> (m_axisXMinValue <span class="operator"><</span> m_areaMinValue) { <span class="type">float</span> dist <span class="operator">=</span> m_axisXMaxValue <span class="operator">-</span> m_axisXMinValue; m_axisXMinValue <span class="operator">=</span> m_areaMinValue; m_axisXMaxValue <span class="operator">=</span> m_axisXMinValue <span class="operator">+</span> dist; } <span class="keyword">if</span> (m_axisXMaxValue <span class="operator">></span> m_areaMaxValue) { <span class="type">float</span> dist <span class="operator">=</span> m_axisXMaxValue <span class="operator">-</span> m_axisXMinValue; m_axisXMaxValue <span class="operator">=</span> m_areaMaxValue; m_axisXMinValue <span class="operator">=</span> m_axisXMaxValue <span class="operator">-</span> dist; } m_axisX<span class="operator">-</span><span class="operator">></span>setRange(m_axisXMinValue<span class="operator">,</span> m_axisXMaxValue); <span class="keyword">break</span>; <span class="keyword">case</span> StateDraggingZ: distance <span class="operator">=</span> (move<span class="operator">.</span>x() <span class="operator">*</span> zMulX <span class="operator">+</span> move<span class="operator">.</span>y() <span class="operator">*</span> zMulY) <span class="operator">*</span> m_speedModifier; m_axisZMinValue <span class="operator">+</span><span class="operator">=</span> distance; m_axisZMaxValue <span class="operator">+</span><span class="operator">=</span> distance; <span class="keyword">if</span> (m_axisZMinValue <span class="operator"><</span> m_areaMinValue) { <span class="type">float</span> dist <span class="operator">=</span> m_axisZMaxValue <span class="operator">-</span> m_axisZMinValue; m_axisZMinValue <span class="operator">=</span> m_areaMinValue; m_axisZMaxValue <span class="operator">=</span> m_axisZMinValue <span class="operator">+</span> dist; } <span class="keyword">if</span> (m_axisZMaxValue <span class="operator">></span> m_areaMaxValue) { <span class="type">float</span> dist <span class="operator">=</span> m_axisZMaxValue <span class="operator">-</span> m_axisZMinValue; m_axisZMaxValue <span class="operator">=</span> m_areaMaxValue; m_axisZMinValue <span class="operator">=</span> m_axisZMaxValue <span class="operator">-</span> dist; } m_axisZ<span class="operator">-</span><span class="operator">></span>setRange(m_axisZMinValue<span class="operator">,</span> m_axisZMaxValue); <span class="keyword">break</span>; <span class="keyword">default</span>: <span class="keyword">break</span>; } } <span class="type">void</span> CustomInputHandler<span class="operator">::</span>checkConstraints() { <span class="keyword">if</span> (m_axisXMinValue <span class="operator"><</span> m_areaMinValue) m_axisXMinValue <span class="operator">=</span> m_areaMinValue; <span class="keyword">if</span> (m_axisXMaxValue <span class="operator">></span> m_areaMaxValue) m_axisXMaxValue <span class="operator">=</span> m_areaMaxValue; <span class="comment">// Don't allow too much zoom in</span> <span class="keyword">if</span> ((m_axisXMaxValue <span class="operator">-</span> m_axisXMinValue) <span class="operator"><</span> m_axisXMinRange) { <span class="type">float</span> adjust <span class="operator">=</span> (m_axisXMinRange <span class="operator">-</span> (m_axisXMaxValue <span class="operator">-</span> m_axisXMinValue)) <span class="operator">/</span> <span class="number">2.0f</span>; m_axisXMinValue <span class="operator">-</span><span class="operator">=</span> adjust; m_axisXMaxValue <span class="operator">+</span><span class="operator">=</span> adjust; } <span class="keyword">if</span> (m_axisZMinValue <span class="operator"><</span> m_areaMinValue) m_axisZMinValue <span class="operator">=</span> m_areaMinValue; <span class="keyword">if</span> (m_axisZMaxValue <span class="operator">></span> m_areaMaxValue) m_axisZMaxValue <span class="operator">=</span> m_areaMaxValue; <span class="comment">// Don't allow too much zoom in</span> <span class="keyword">if</span> ((m_axisZMaxValue <span class="operator">-</span> m_axisZMinValue) <span class="operator"><</span> m_axisZMinRange) { <span class="type">float</span> adjust <span class="operator">=</span> (m_axisZMinRange <span class="operator">-</span> (m_axisZMaxValue <span class="operator">-</span> m_axisZMinValue)) <span class="operator">/</span> <span class="number">2.0f</span>; m_axisZMinValue <span class="operator">-</span><span class="operator">=</span> adjust; m_axisZMaxValue <span class="operator">+</span><span class="operator">=</span> adjust; } } </pre> </div> <!-- @@@texturesurface/custominputhandler.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. 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