<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- affine.qdoc --> <title>Affine Transformations | Qt Widgets 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="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="examples-painting.html">Painting Examples</a></td><td >Affine Transformations</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">Affine Transformations</h1> <span class="subtitle"></span> <!-- $$$painting/affine-description --> <div class="descr"> <a name="details"></a> <p class="centerAlign"><img src="images/affine-demo.png" alt="" /></p><p>Transformations can be performed on any kind of graphics drawn using <a href="../qtgui/qpainter.html">QPainter</a>. The transformations used to display the vector graphics, images, and text can be adjusted in the following ways:</p> <ul> <li>Dragging the red circle in the centre of each drawing moves it to a new position.</li> <li>Dragging the displaced red circle causes the current drawing to be rotated about the central circle. Rotation can also be controlled with the <b>Rotate</b> slider.</li> <li>Scaling is controlled with the <b>Scale</b> slider.</li> <li>Each drawing can be sheared with the <b>Shear</b> slider.</li> </ul> <p>Files:</p> <ul> <li><a href="qtwidgets-painting-affine-xform-cpp.html">painting/affine/xform.cpp</a></li> <li><a href="qtwidgets-painting-affine-xform-h.html">painting/affine/xform.h</a></li> <li><a href="qtwidgets-painting-affine-main-cpp.html">painting/affine/main.cpp</a></li> <li><a href="qtwidgets-painting-affine-affine-pro.html">painting/affine/affine.pro</a></li> <li><a href="qtwidgets-painting-affine-affine-qrc.html">painting/affine/affine.qrc</a></li> </ul> </div> <!-- @@@painting/affine --> </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>