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<h1 class="title">regexpdialog.cpp Example File</h1>
<span class="subtitle">tools/regexp/regexpdialog.cpp</span>
<!-- $$$tools/regexp/regexpdialog.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.
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  ****************************************************************************/</span>

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

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

  RegExpDialog<span class="operator">::</span>RegExpDialog(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
      : <span class="type"><a href="qdialog.html">QDialog</a></span>(parent)
  {
      patternComboBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcombobox.html">QComboBox</a></span>;
      patternComboBox<span class="operator">-</span><span class="operator">&gt;</span>setEditable(<span class="keyword">true</span>);
      patternComboBox<span class="operator">-</span><span class="operator">&gt;</span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span>
                                     <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Preferred);

      patternLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;&amp;Pattern:&quot;</span>));
      patternLabel<span class="operator">-</span><span class="operator">&gt;</span>setBuddy(patternComboBox);

      escapedPatternLineEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>;
      escapedPatternLineEdit<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);
      <span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span> palette <span class="operator">=</span> escapedPatternLineEdit<span class="operator">-</span><span class="operator">&gt;</span>palette();
      palette<span class="operator">.</span>setBrush(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Base<span class="operator">,</span>
                       palette<span class="operator">.</span>brush(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Disabled<span class="operator">,</span> <span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Base));
      escapedPatternLineEdit<span class="operator">-</span><span class="operator">&gt;</span>setPalette(palette);

      escapedPatternLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;&amp;Escaped Pattern:&quot;</span>));
      escapedPatternLabel<span class="operator">-</span><span class="operator">&gt;</span>setBuddy(escapedPatternLineEdit);

      syntaxComboBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcombobox.html">QComboBox</a></span>;
      syntaxComboBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Regular expression v1&quot;</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qregexp.html">QRegExp</a></span><span class="operator">::</span>RegExp);
      syntaxComboBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Regular expression v2&quot;</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qregexp.html">QRegExp</a></span><span class="operator">::</span>RegExp2);
      syntaxComboBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Wildcard&quot;</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qregexp.html">QRegExp</a></span><span class="operator">::</span>Wildcard);
      syntaxComboBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Fixed string&quot;</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qregexp.html">QRegExp</a></span><span class="operator">::</span>FixedString);
      syntaxComboBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;W3C Xml Schema 1.1&quot;</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qregexp.html">QRegExp</a></span><span class="operator">::</span>W3CXmlSchema11);

      syntaxLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;&amp;Pattern Syntax:&quot;</span>));
      syntaxLabel<span class="operator">-</span><span class="operator">&gt;</span>setBuddy(syntaxComboBox);

      textComboBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcombobox.html">QComboBox</a></span>;
      textComboBox<span class="operator">-</span><span class="operator">&gt;</span>setEditable(<span class="keyword">true</span>);
      textComboBox<span class="operator">-</span><span class="operator">&gt;</span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Preferred);

      textLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;&amp;Text:&quot;</span>));
      textLabel<span class="operator">-</span><span class="operator">&gt;</span>setBuddy(textComboBox);

      caseSensitiveCheckBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcheckbox.html">QCheckBox</a></span>(tr(<span class="string">&quot;Case &amp;Sensitive&quot;</span>));
      caseSensitiveCheckBox<span class="operator">-</span><span class="operator">&gt;</span>setChecked(<span class="keyword">true</span>);
      minimalCheckBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcheckbox.html">QCheckBox</a></span>(tr(<span class="string">&quot;&amp;Minimal&quot;</span>));

      indexLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Index of Match:&quot;</span>));
      indexEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>;
      indexEdit<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);

      matchedLengthLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Matched Length:&quot;</span>));
      matchedLengthEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>;
      matchedLengthEdit<span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);

      <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> MaxCaptures; <span class="operator">+</span><span class="operator">+</span>i) {
          captureLabels<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Capture %1:&quot;</span>)<span class="operator">.</span>arg(i));
          captureEdits<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>;
          captureEdits<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">&gt;</span>setReadOnly(<span class="keyword">true</span>);
      }
      captureLabels<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Match:&quot;</span>));

      <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>checkBoxLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>;
      checkBoxLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(caseSensitiveCheckBox);
      checkBoxLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(minimalCheckBox);
      checkBoxLayout<span class="operator">-</span><span class="operator">&gt;</span>addStretch(<span class="number">1</span>);

      <span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>;
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(patternLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(patternComboBox<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(escapedPatternLabel<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(escapedPatternLineEdit<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(syntaxLabel<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(syntaxComboBox<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addLayout(checkBoxLayout<span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(textLabel<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">0</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(textComboBox<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(indexLabel<span class="operator">,</span> <span class="number">5</span><span class="operator">,</span> <span class="number">0</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(indexEdit<span class="operator">,</span> <span class="number">5</span><span class="operator">,</span> <span class="number">1</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(matchedLengthLabel<span class="operator">,</span> <span class="number">6</span><span class="operator">,</span> <span class="number">0</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(matchedLengthEdit<span class="operator">,</span> <span class="number">6</span><span class="operator">,</span> <span class="number">1</span>);

      <span class="keyword">for</span> (<span class="type">int</span> j <span class="operator">=</span> <span class="number">0</span>; j <span class="operator">&lt;</span> MaxCaptures; <span class="operator">+</span><span class="operator">+</span>j) {
          mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(captureLabels<span class="operator">[</span>j<span class="operator">]</span><span class="operator">,</span> <span class="number">7</span> <span class="operator">+</span> j<span class="operator">,</span> <span class="number">0</span>);
          mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(captureEdits<span class="operator">[</span>j<span class="operator">]</span><span class="operator">,</span> <span class="number">7</span> <span class="operator">+</span> j<span class="operator">,</span> <span class="number">1</span>);
      }
      setLayout(mainLayout);

      connect(patternComboBox<span class="operator">,</span> SIGNAL(editTextChanged(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>))<span class="operator">,</span>
              <span class="keyword">this</span><span class="operator">,</span> SLOT(refresh()));
      connect(textComboBox<span class="operator">,</span> SIGNAL(editTextChanged(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>))<span class="operator">,</span>
              <span class="keyword">this</span><span class="operator">,</span> SLOT(refresh()));
      connect(caseSensitiveCheckBox<span class="operator">,</span> SIGNAL(toggled(bool))<span class="operator">,</span>
              <span class="keyword">this</span><span class="operator">,</span> SLOT(refresh()));
      connect(minimalCheckBox<span class="operator">,</span> SIGNAL(toggled(bool))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(refresh()));
      connect(syntaxComboBox<span class="operator">,</span> SIGNAL(currentIndexChanged(<span class="type">int</span>))<span class="operator">,</span>
              <span class="keyword">this</span><span class="operator">,</span> SLOT(refresh()));

      patternComboBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;[A-Za-z_]+([A-Za-z_0-9]*)&quot;</span>));
      textComboBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;(10 + delta4) * 32&quot;</span>));

      setWindowTitle(tr(<span class="string">&quot;RegExp&quot;</span>));
      setFixedHeight(sizeHint()<span class="operator">.</span>height());
      refresh();
  }

  <span class="type">void</span> RegExpDialog<span class="operator">::</span>refresh()
  {
      setUpdatesEnabled(<span class="keyword">false</span>);

      <span class="type"><a href="../qtcore/qstring.html">QString</a></span> pattern <span class="operator">=</span> patternComboBox<span class="operator">-</span><span class="operator">&gt;</span>currentText();
      <span class="type"><a href="../qtcore/qstring.html">QString</a></span> text <span class="operator">=</span> textComboBox<span class="operator">-</span><span class="operator">&gt;</span>currentText();

      <span class="type"><a href="../qtcore/qstring.html">QString</a></span> escaped <span class="operator">=</span> pattern;
      escaped<span class="operator">.</span>replace(<span class="string">&quot;\\&quot;</span><span class="operator">,</span> <span class="string">&quot;\\\\&quot;</span>);
      escaped<span class="operator">.</span>replace(<span class="string">&quot;\&quot;&quot;</span><span class="operator">,</span> <span class="string">&quot;\\\&quot;&quot;</span>);
      escaped<span class="operator">.</span>prepend(<span class="char">'&quot;'</span>);
      escaped<span class="operator">.</span>append(<span class="char">'&quot;'</span>);
      escapedPatternLineEdit<span class="operator">-</span><span class="operator">&gt;</span>setText(escaped);

      <span class="type"><a href="../qtcore/qregexp.html">QRegExp</a></span> rx(pattern);
      <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>CaseSensitivity cs <span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>CaseInsensitive;
      <span class="keyword">if</span> (caseSensitiveCheckBox<span class="operator">-</span><span class="operator">&gt;</span>isChecked())
          cs <span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>CaseSensitive;
      rx<span class="operator">.</span>setCaseSensitivity(cs);
      rx<span class="operator">.</span>setMinimal(minimalCheckBox<span class="operator">-</span><span class="operator">&gt;</span>isChecked());
      <span class="type"><a href="../qtcore/qregexp.html">QRegExp</a></span><span class="operator">::</span>PatternSyntax syntax <span class="operator">=</span> <span class="type"><a href="../qtcore/qregexp.html">QRegExp</a></span><span class="operator">::</span>PatternSyntax(
              syntaxComboBox<span class="operator">-</span><span class="operator">&gt;</span>itemData(syntaxComboBox<span class="operator">-</span><span class="operator">&gt;</span>currentIndex())<span class="operator">.</span>toInt());
      rx<span class="operator">.</span>setPatternSyntax(syntax);

      <span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span> palette <span class="operator">=</span> patternComboBox<span class="operator">-</span><span class="operator">&gt;</span>palette();
      <span class="keyword">if</span> (rx<span class="operator">.</span>isValid()) {
          palette<span class="operator">.</span>setColor(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Text<span class="operator">,</span>
                           textComboBox<span class="operator">-</span><span class="operator">&gt;</span>palette()<span class="operator">.</span>color(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Text));
      } <span class="keyword">else</span> {
          palette<span class="operator">.</span>setColor(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Text<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>red);
      }
      patternComboBox<span class="operator">-</span><span class="operator">&gt;</span>setPalette(palette);

      indexEdit<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>number(rx<span class="operator">.</span>indexIn(text)));
      matchedLengthEdit<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>number(rx<span class="operator">.</span>matchedLength()));
      <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> MaxCaptures; <span class="operator">+</span><span class="operator">+</span>i) {
          captureLabels<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">&gt;</span>setEnabled(i <span class="operator">&lt;</span><span class="operator">=</span> rx<span class="operator">.</span>captureCount());
          captureEdits<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">&gt;</span>setEnabled(i <span class="operator">&lt;</span><span class="operator">=</span> rx<span class="operator">.</span>captureCount());
          captureEdits<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">&gt;</span>setText(rx<span class="operator">.</span>cap(i));
      }

      setUpdatesEnabled(<span class="keyword">true</span>);
  }

</pre>
</div>
<!-- @@@tools/regexp/regexpdialog.cpp -->
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