Sophie: qtbase5-doc-5.9.4-1.1.mga6 noarch

qtbase5-doc-5.9.4-1.1.mga6.noarch.rpm

<?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>coloritem.cpp Example File | 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="qtwidgets-graphicsview-dragdroprobot-example.html">Drag and Drop Robot Example</a></td><td >coloritem.cpp 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">coloritem.cpp Example File</h1>
<span class="subtitle">graphicsview/dragdroprobot/coloritem.cpp</span>
<!-- $$$graphicsview/dragdroprobot/coloritem.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 examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** 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.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** &quot;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
  ** &quot;AS IS&quot; 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.&quot;
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/</span>

  <span class="preprocessor">#include &lt;QtWidgets&gt;</span>

  <span class="preprocessor">#include &quot;coloritem.h&quot;</span>

  ColorItem<span class="operator">::</span>ColorItem()
      : color(qrand() <span class="operator">%</span> <span class="number">256</span><span class="operator">,</span> qrand() <span class="operator">%</span> <span class="number">256</span><span class="operator">,</span> qrand() <span class="operator">%</span> <span class="number">256</span>)
  {
      setToolTip(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>(<span class="string">&quot;QColor(%1, %2, %3)\n%4&quot;</span>)
                <span class="operator">.</span>arg(color<span class="operator">.</span>red())<span class="operator">.</span>arg(color<span class="operator">.</span>green())<span class="operator">.</span>arg(color<span class="operator">.</span>blue())
                <span class="operator">.</span>arg(<span class="string">&quot;Click and drag this color onto the robot!&quot;</span>));
      setCursor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>OpenHandCursor);
      setAcceptedMouseButtons(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>LeftButton);
  }

  <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> ColorItem<span class="operator">::</span>boundingRect() <span class="keyword">const</span>
  {
      <span class="keyword">return</span> <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span>(<span class="operator">-</span><span class="number">15.5</span><span class="operator">,</span> <span class="operator">-</span><span class="number">15.5</span><span class="operator">,</span> <span class="number">34</span><span class="operator">,</span> <span class="number">34</span>);
  }

  <span class="type">void</span> ColorItem<span class="operator">::</span>paint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> <span class="operator">*</span>painter<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstyleoptiongraphicsitem.html">QStyleOptionGraphicsItem</a></span> <span class="operator">*</span>option<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget)
  {
      Q_UNUSED(option);
      Q_UNUSED(widget);
      painter<span class="operator">-</span><span class="operator">&gt;</span>setPen(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>NoPen);
      painter<span class="operator">-</span><span class="operator">&gt;</span>setBrush(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>darkGray);
      painter<span class="operator">-</span><span class="operator">&gt;</span>drawEllipse(<span class="operator">-</span><span class="number">12</span><span class="operator">,</span> <span class="operator">-</span><span class="number">12</span><span class="operator">,</span> <span class="number">30</span><span class="operator">,</span> <span class="number">30</span>);
      painter<span class="operator">-</span><span class="operator">&gt;</span>setPen(<span class="type"><a href="../qtgui/qpen.html">QPen</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black<span class="operator">,</span> <span class="number">1</span>));
      painter<span class="operator">-</span><span class="operator">&gt;</span>setBrush(<span class="type"><a href="../qtgui/qbrush.html">QBrush</a></span>(color));
      painter<span class="operator">-</span><span class="operator">&gt;</span>drawEllipse(<span class="operator">-</span><span class="number">15</span><span class="operator">,</span> <span class="operator">-</span><span class="number">15</span><span class="operator">,</span> <span class="number">30</span><span class="operator">,</span> <span class="number">30</span>);
  }

  <span class="type">void</span> ColorItem<span class="operator">::</span>mousePressEvent(<span class="type"><a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a></span> <span class="operator">*</span>)
  {
      setCursor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ClosedHandCursor);
  }

  <span class="type">void</span> ColorItem<span class="operator">::</span>mouseMoveEvent(<span class="type"><a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a></span> <span class="operator">*</span>event)
  {
      <span class="keyword">if</span> (<span class="type"><a href="../qtcore/qlinef.html">QLineF</a></span>(event<span class="operator">-</span><span class="operator">&gt;</span>screenPos()<span class="operator">,</span> event<span class="operator">-</span><span class="operator">&gt;</span>buttonDownScreenPos(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>LeftButton))
          <span class="operator">.</span>length() <span class="operator">&lt;</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>startDragDistance()) {
          <span class="keyword">return</span>;
      }

      <span class="type"><a href="../qtgui/qdrag.html">QDrag</a></span> <span class="operator">*</span>drag <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtgui/qdrag.html">QDrag</a></span>(event<span class="operator">-</span><span class="operator">&gt;</span>widget());
      <span class="type"><a href="../qtcore/qmimedata.html">QMimeData</a></span> <span class="operator">*</span>mime <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qmimedata.html">QMimeData</a></span>;
      drag<span class="operator">-</span><span class="operator">&gt;</span>setMimeData(mime);

      <span class="keyword">static</span> <span class="type">int</span> n <span class="operator">=</span> <span class="number">0</span>;
      <span class="keyword">if</span> (n<span class="operator">+</span><span class="operator">+</span> <span class="operator">&gt;</span> <span class="number">2</span> <span class="operator">&amp;</span><span class="operator">&amp;</span> (qrand() <span class="operator">%</span> <span class="number">3</span>) <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) {
          <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> image(<span class="string">&quot;:/images/head.png&quot;</span>);
          mime<span class="operator">-</span><span class="operator">&gt;</span>setImageData(image);

          drag<span class="operator">-</span><span class="operator">&gt;</span>setPixmap(<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span><span class="operator">::</span>fromImage(image)<span class="operator">.</span>scaled(<span class="number">30</span><span class="operator">,</span> <span class="number">40</span>));
          drag<span class="operator">-</span><span class="operator">&gt;</span>setHotSpot(<span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span>(<span class="number">15</span><span class="operator">,</span> <span class="number">30</span>));
      } <span class="keyword">else</span> {
          mime<span class="operator">-</span><span class="operator">&gt;</span>setColorData(color);
          mime<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>(<span class="string">&quot;#%1%2%3&quot;</span>)
                        <span class="operator">.</span>arg(color<span class="operator">.</span>red()<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">16</span><span class="operator">,</span> QLatin1Char(<span class="char">'0'</span>))
                        <span class="operator">.</span>arg(color<span class="operator">.</span>green()<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">16</span><span class="operator">,</span> QLatin1Char(<span class="char">'0'</span>))
                        <span class="operator">.</span>arg(color<span class="operator">.</span>blue()<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">16</span><span class="operator">,</span> QLatin1Char(<span class="char">'0'</span>)));

          <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> pixmap(<span class="number">34</span><span class="operator">,</span> <span class="number">34</span>);
          pixmap<span class="operator">.</span>fill(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>white);

          <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> painter(<span class="operator">&amp;</span>pixmap);
          painter<span class="operator">.</span>translate(<span class="number">15</span><span class="operator">,</span> <span class="number">15</span>);
          painter<span class="operator">.</span>setRenderHint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing);
          paint(<span class="operator">&amp;</span>painter<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
          painter<span class="operator">.</span>end();

          pixmap<span class="operator">.</span>setMask(pixmap<span class="operator">.</span>createHeuristicMask());

          drag<span class="operator">-</span><span class="operator">&gt;</span>setPixmap(pixmap);
          drag<span class="operator">-</span><span class="operator">&gt;</span>setHotSpot(<span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span>(<span class="number">15</span><span class="operator">,</span> <span class="number">20</span>));
      }

      drag<span class="operator">-</span><span class="operator">&gt;</span>exec();
      setCursor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>OpenHandCursor);
  }

  <span class="type">void</span> ColorItem<span class="operator">::</span>mouseReleaseEvent(<span class="type"><a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a></span> <span class="operator">*</span>)
  {
      setCursor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>OpenHandCursor);
  }

</pre>
</div>
<!-- @@@graphicsview/dragdroprobot/coloritem.cpp -->
        </div>
       </div>
   </div>
   </div>
</div>
<div class="footer">
   <p>
   <acronym title="Copyright">&copy;</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>