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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/regexptester/regexptester.doc:1 -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>A Small Application for Testing Regular Expressions</title>
+<style type="text/css"><!--
+fn { margin-left: 1cm; text-indent: -1cm; }
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+body { background: #ffffff; color: black; }
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+</head>
+<body>
+
+<table border="0" cellpadding="0" cellspacing="0" width="100%">
+<tr bgcolor="#E5E5E5">
+<td valign=center>
+ <a href="index.html">
+<font color="#004faf">Home</font></a>
+ | <a href="classes.html">
+<font color="#004faf">All&nbsp;Classes</font></a>
+ | <a href="mainclasses.html">
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+<font color="#004faf">Annotated</font></a>
+ | <a href="groups.html">
+<font color="#004faf">Grouped&nbsp;Classes</font></a>
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+<font color="#004faf">Functions</font></a>
+</td>
+<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>A Small Application for Testing Regular Expressions</h1>
+
+
+
+<p>
+<p> Regular expressions can sometimes be tricky to get right,
+especially those that use the * quantifier. This application lets
+you type in a regexp (without doubling the backslashes) and some
+test text, and to execute the regexp and see the results. If you
+click the Copy button the regexp will be copied to the clipboard
+(with the backslashes doubled, ready for you to paste into your
+program). Previous regexps and test texts are remembered
+throughout the session and can be accessed by dropping down the
+comboboxes.
+<p> <hr>
+<p> Header file:
+<p> <pre>#ifndef REGEXPTESTER_H
+#define REGEXPTESTER_H
+
+#include &lt;<a href="qdialog-h.html">qdialog.h</a>&gt;
+
+class QCheckBox;
+class QComboBox;
+class QLabel;
+class QPushButton;
+class QStatusBar;
+class QTable;
+
+class RegexpTester : public <a href="qdialog.html">QDialog</a>
+{
+ <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
+
+public:
+ RegexpTester(QWidget* parent=0, const char* name=0, bool modal=false,
+ WFlags f=0);
+
+ <a href="qlabel.html">QLabel</a> *regexLabel;
+ <a href="qcombobox.html">QComboBox</a> *regexComboBox;
+ <a href="qlabel.html">QLabel</a> *textLabel;
+ <a href="qcombobox.html">QComboBox</a> *textComboBox;
+ <a href="qcheckbox.html">QCheckBox</a> *caseSensitiveCheckBox;
+ <a href="qcheckbox.html">QCheckBox</a> *minimalCheckBox;
+ <a href="qcheckbox.html">QCheckBox</a> *wildcardCheckBox;
+ <a href="qtable.html">QTable</a> *resultTable;
+ <a href="qpushbutton.html">QPushButton</a> *executePushButton;
+ <a href="qpushbutton.html">QPushButton</a> *copyPushButton;
+ <a href="qpushbutton.html">QPushButton</a> *quitPushButton;
+ <a href="qstatusbar.html">QStatusBar</a> *statusBar;
+
+public slots:
+ void copy();
+ void execute();
+
+private:
+ void languageChange();
+};
+
+#endif // REGEXPTESTER_H
+</pre>
+
+<p> <hr>
+<p> Implementation:
+<p> <pre>#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
+#include &lt;<a href="qcheckbox-h.html">qcheckbox.h</a>&gt;
+#include &lt;<a href="qclipboard-h.html">qclipboard.h</a>&gt;
+#include &lt;<a href="qcombobox-h.html">qcombobox.h</a>&gt;
+#include &lt;<a href="qlabel-h.html">qlabel.h</a>&gt;
+#include &lt;<a href="qlayout-h.html">qlayout.h</a>&gt;
+#include &lt;<a href="qpushbutton-h.html">qpushbutton.h</a>&gt;
+#include &lt;<a href="qregexp-h.html">qregexp.h</a>&gt;
+#include &lt;<a href="qstatusbar-h.html">qstatusbar.h</a>&gt;
+#include &lt;<a href="qtable-h.html">qtable.h</a>&gt;
+
+#include "regexptester.h"
+
+
+<a name="f556"></a>RegexpTester::RegexpTester(QWidget* parent, const char* name, bool modal,
+ WFlags f)
+ : <a href="qdialog.html">QDialog</a>(parent, name, modal, f)
+{
+ regexLabel = new <a href="qlabel.html">QLabel</a>(this);
+ regexComboBox = new <a href="qcombobox.html">QComboBox</a>(this);
+<a name="x2480"></a> regexComboBox-&gt;<a href="qcombobox.html#setEditable">setEditable</a>(true);
+<a name="x2507"></a> regexComboBox-&gt;<a href="qwidget.html#setSizePolicy">setSizePolicy</a>(QSizePolicy::Expanding, QSizePolicy::Preferred);
+<a name="x2482"></a> regexLabel-&gt;<a href="qlabel.html#setBuddy">setBuddy</a>(regexComboBox);
+ textLabel = new <a href="qlabel.html">QLabel</a>(this);
+ textComboBox = new <a href="qcombobox.html">QComboBox</a>(this);
+ textComboBox-&gt;<a href="qcombobox.html#setEditable">setEditable</a>(true);
+ textComboBox-&gt;<a href="qwidget.html#setSizePolicy">setSizePolicy</a>(QSizePolicy::Expanding, QSizePolicy::Preferred);
+ textLabel-&gt;<a href="qlabel.html#setBuddy">setBuddy</a>(textComboBox);
+ caseSensitiveCheckBox = new <a href="qcheckbox.html">QCheckBox</a>(this);
+<a name="x2475"></a> caseSensitiveCheckBox-&gt;<a href="qcheckbox.html#setChecked">setChecked</a>(true);
+ minimalCheckBox = new <a href="qcheckbox.html">QCheckBox</a>(this);
+ wildcardCheckBox = new <a href="qcheckbox.html">QCheckBox</a>(this);
+ resultTable = new <a href="qtable.html">QTable</a>(3, 3, this);
+<a name="x2506"></a> resultTable-&gt;<a href="qtable.html#verticalHeader">verticalHeader</a>()-&gt;hide();
+<a name="x2501"></a> resultTable-&gt;<a href="qtable.html#setLeftMargin">setLeftMargin</a>(0);
+<a name="x2499"></a> resultTable-&gt;<a href="qtable.html#horizontalHeader">horizontalHeader</a>()-&gt;hide();
+<a name="x2505"></a> resultTable-&gt;<a href="qtable.html#setTopMargin">setTopMargin</a>(0);
+<a name="x2503"></a> resultTable-&gt;<a href="qtable.html#setReadOnly">setReadOnly</a>(true);
+ executePushButton = new <a href="qpushbutton.html">QPushButton</a>(this);
+<a name="x2484"></a> executePushButton-&gt;<a href="qpushbutton.html#setDefault">setDefault</a>(true);
+ copyPushButton = new <a href="qpushbutton.html">QPushButton</a>(this);
+ quitPushButton = new <a href="qpushbutton.html">QPushButton</a>(this);
+ statusBar = new <a href="qstatusbar.html">QStatusBar</a>(this);
+
+ <a href="qgridlayout.html">QGridLayout</a> *gridLayout = new <a href="qgridlayout.html">QGridLayout</a>(2, 2, 6);
+ gridLayout-&gt;<a href="qgridlayout.html#addWidget">addWidget</a>(regexLabel, 0, 0);
+ gridLayout-&gt;<a href="qgridlayout.html#addWidget">addWidget</a>(regexComboBox, 0, 1);
+ gridLayout-&gt;<a href="qgridlayout.html#addWidget">addWidget</a>(textLabel, 1, 0);
+ gridLayout-&gt;<a href="qgridlayout.html#addWidget">addWidget</a>(textComboBox, 1, 1);
+ <a href="qhboxlayout.html">QHBoxLayout</a> *checkboxLayout = new <a href="qhboxlayout.html">QHBoxLayout</a>(0, 6, 6);
+ checkboxLayout-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(caseSensitiveCheckBox);
+ checkboxLayout-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(minimalCheckBox);
+ checkboxLayout-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(wildcardCheckBox);
+<a name="x2470"></a> checkboxLayout-&gt;<a href="qboxlayout.html#addStretch">addStretch</a>(1);
+ <a href="qvboxlayout.html">QVBoxLayout</a> *buttonLayout = new <a href="qvboxlayout.html">QVBoxLayout</a>(0, 6, 6);
+ buttonLayout-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(executePushButton);
+ buttonLayout-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(copyPushButton);
+ buttonLayout-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(quitPushButton);
+ buttonLayout-&gt;<a href="qboxlayout.html#addStretch">addStretch</a>(1);
+ <a href="qhboxlayout.html">QHBoxLayout</a> *middleLayout = new <a href="qhboxlayout.html">QHBoxLayout</a>(0, 6, 6);
+ middleLayout-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(resultTable);
+<a name="x2469"></a> middleLayout-&gt;<a href="qboxlayout.html#addLayout">addLayout</a>(buttonLayout);
+ <a href="qvboxlayout.html">QVBoxLayout</a> *mainLayout = new <a href="qvboxlayout.html">QVBoxLayout</a>(this, 6, 6);
+ mainLayout-&gt;<a href="qboxlayout.html#addLayout">addLayout</a>(gridLayout);
+ mainLayout-&gt;<a href="qboxlayout.html#addLayout">addLayout</a>(checkboxLayout);
+ mainLayout-&gt;<a href="qboxlayout.html#addLayout">addLayout</a>(middleLayout);
+ mainLayout-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(statusBar);
+
+ <a href="qwidget.html#resize">resize</a>(QSize(500, 350).expandedTo(<a href="qwidget.html#minimumSizeHint">minimumSizeHint</a>()));
+
+ languageChange();
+
+ <a href="qobject.html#connect">connect</a>(copyPushButton, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), this, SLOT(copy()));
+ <a href="qobject.html#connect">connect</a>(executePushButton, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), this, SLOT(execute()));
+ <a href="qobject.html#connect">connect</a>(quitPushButton, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), this, SLOT(<a href="qdialog.html#accept">accept</a>()));
+
+ execute();
+}
+
+void <a name="f557"></a>RegexpTester::execute()
+{
+<a name="x2478"></a> <a href="qstring.html">QString</a> regex = regexComboBox-&gt;<a href="qcombobox.html#currentText">currentText</a>();
+ <a href="qstring.html">QString</a> text = textComboBox-&gt;<a href="qcombobox.html#currentText">currentText</a>();
+ if (!regex.<a href="qstring.html#isEmpty">isEmpty</a>() &amp;&amp; !text.<a href="qstring.html#isEmpty">isEmpty</a>()) {
+ <a href="qregexp.html">QRegExp</a> re(regex);
+<a name="x2491"></a><a name="x2474"></a> re.<a href="qregexp.html#setCaseSensitive">setCaseSensitive</a>(caseSensitiveCheckBox-&gt;<a href="qcheckbox.html#isChecked">isChecked</a>());
+<a name="x2492"></a> re.<a href="qregexp.html#setMinimal">setMinimal</a>(minimalCheckBox-&gt;<a href="qcheckbox.html#isChecked">isChecked</a>());
+ bool wildcard = wildcardCheckBox-&gt;<a href="qcheckbox.html#isChecked">isChecked</a>();
+<a name="x2493"></a> re.<a href="qregexp.html#setWildcard">setWildcard</a>(wildcard);
+<a name="x2487"></a> if (!re.<a href="qregexp.html#isValid">isValid</a>()) {
+<a name="x2494"></a> statusBar-&gt;<a href="qstatusbar.html#message">message</a>(<a href="qobject.html#tr">tr</a>("Invalid <a href="qregexp.html#regular-expression">regular expression</a>: %1")
+<a name="x2486"></a> .arg(re.<a href="qregexp.html#errorString">errorString</a>()));
+ return;
+ }
+<a name="x2490"></a> int offset = re.<a href="qregexp.html#search">search</a>(text);
+<a name="x2489"></a> int captures = re.<a href="qregexp.html#numCaptures">numCaptures</a>();
+ int row = 0;
+ const int OFFSET = 5;
+<a name="x2502"></a> resultTable-&gt;<a href="qtable.html#setNumRows">setNumRows</a>(0);
+ resultTable-&gt;<a href="qtable.html#setNumRows">setNumRows</a>(captures + OFFSET);
+<a name="x2504"></a> resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 0, tr("Regex"));
+ <a href="qstring.html">QString</a> escaped = regex;
+<a name="x2497"></a> escaped = escaped.<a href="qstring.html#replace">replace</a>("\\", "\\\\");
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 1, escaped);
+<a name="x2500"></a> resultTable-&gt;<a href="qtable.html#item">item</a>(row, 1)-&gt;setSpan(1, 2);
+ if (offset != -1) {
+ ++row;
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 0, tr("Offset"));
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 1, QString::number(offset));
+ resultTable-&gt;<a href="qtable.html#item">item</a>(row, 1)-&gt;setSpan(1, 2);
+ if (!wildcard) {
+ ++row;
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 0, tr("Captures"));
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 1, QString::number(captures));
+ resultTable-&gt;<a href="qtable.html#item">item</a>(row, 1)-&gt;setSpan(1, 2);
+ ++row;
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 1, tr("Text"));
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 2, tr("Characters"));
+ }
+ ++row;
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 0, tr("Match"));
+<a name="x2485"></a> resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 1, re.<a href="qregexp.html#cap">cap</a>(0));
+<a name="x2488"></a> resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 2, QString::number(re.<a href="qregexp.html#matchedLength">matchedLength</a>()));
+ if (!wildcard) {
+ for (int i = 1; i &lt;= captures; ++i) {
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row + i, 0, tr("Capture #%1").arg(i));
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row + i, 1, re.<a href="qregexp.html#cap">cap</a>(i));
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row + i, 2,
+<a name="x2496"></a> QString::<a href="qstring.html#number">number</a>(re.<a href="qregexp.html#cap">cap</a>(i).length()));
+ }
+ }
+ else
+ resultTable-&gt;<a href="qtable.html#setNumRows">setNumRows</a>(3);
+ }
+ else {
+ resultTable-&gt;<a href="qtable.html#setNumRows">setNumRows</a>(2);
+ ++row;
+ resultTable-&gt;<a href="qtable.html#setText">setText</a>(row, 0, tr("No matches"));
+ resultTable-&gt;<a href="qtable.html#item">item</a>(row, 0)-&gt;setSpan(1, 3);
+ }
+<a name="x2498"></a> resultTable-&gt;<a href="qtable.html#adjustColumn">adjustColumn</a>(0);
+ resultTable-&gt;<a href="qtable.html#adjustColumn">adjustColumn</a>(1);
+ resultTable-&gt;<a href="qtable.html#adjustColumn">adjustColumn</a>(2);
+ statusBar-&gt;<a href="qstatusbar.html#message">message</a>(<a href="qobject.html#tr">tr</a>("Executed \"%1\" on \"%2\"")
+ .arg(escaped).arg(text));
+ }
+ else
+ statusBar-&gt;<a href="qstatusbar.html#message">message</a>(<a href="qobject.html#tr">tr</a>("A regular expression and a text must be given"));
+}
+
+void <a name="f558"></a>RegexpTester::copy()
+{
+ <a href="qstring.html">QString</a> escaped = regexComboBox-&gt;<a href="qcombobox.html#currentText">currentText</a>();
+ if (!escaped.<a href="qstring.html#isEmpty">isEmpty</a>()) {
+ escaped = escaped.<a href="qstring.html#replace">replace</a>("\\", "\\\\");
+<a name="x2468"></a> <a href="qclipboard.html">QClipboard</a> *cb = QApplication::<a href="qapplication.html#clipboard">clipboard</a>();
+<a name="x2476"></a> cb-&gt;<a href="qclipboard.html#setText">setText</a>(escaped, QClipboard::Clipboard);
+<a name="x2477"></a> if (cb-&gt;<a href="qclipboard.html#supportsSelection">supportsSelection</a>())
+ cb-&gt;<a href="qclipboard.html#setText">setText</a>(escaped, QClipboard::Selection);
+ statusBar-&gt;<a href="qstatusbar.html#message">message</a>(<a href="qobject.html#tr">tr</a>("Copied \"%1\" to the clipboard")
+ .arg(escaped));
+ }
+}
+
+void <a name="f559"></a>RegexpTester::languageChange()
+{
+ <a href="qwidget.html#setCaption">setCaption</a>(<a href="qobject.html#tr">tr</a>("Regex Tester"));
+ regexLabel-&gt;<a href="qlabel.html#setText">setText</a>(<a href="qobject.html#tr">tr</a>("&amp;Regex:"));
+<a name="x2479"></a> regexComboBox-&gt;<a href="qcombobox.html#insertItem">insertItem</a>(<a href="qobject.html#tr">tr</a>("[A-Z]+=(\\d+):(\\d*)"));
+ textLabel-&gt;<a href="qlabel.html#setText">setText</a>(<a href="qobject.html#tr">tr</a>("&amp;Text:"));
+ textComboBox-&gt;<a href="qcombobox.html#insertItem">insertItem</a>(<a href="qobject.html#tr">tr</a>("ABC=12:3456"));
+<a name="x2473"></a> caseSensitiveCheckBox-&gt;<a href="qbutton.html#setText">setText</a>(<a href="qobject.html#tr">tr</a>("Case &amp;Sensitive"));
+ minimalCheckBox-&gt;<a href="qbutton.html#setText">setText</a>(<a href="qobject.html#tr">tr</a>("&amp;Minimal"));
+ wildcardCheckBox-&gt;<a href="qbutton.html#setText">setText</a>(<a href="qobject.html#tr">tr</a>("&amp;Wildcard"));
+ copyPushButton-&gt;<a href="qbutton.html#setText">setText</a>(<a href="qobject.html#tr">tr</a>("&amp;Copy"));
+ executePushButton-&gt;<a href="qbutton.html#setText">setText</a>(<a href="qobject.html#tr">tr</a>("&amp;Execute"));
+ quitPushButton-&gt;<a href="qbutton.html#setText">setText</a>(<a href="qobject.html#tr">tr</a>("&amp;Quit"));
+}
+
+</pre>
+
+<p> <hr>
+<p> Main:
+<p> <pre>#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
+#include "regexptester.h"
+
+int main(int argc, char **argv)
+{
+ <a href="qapplication.html">QApplication</a> app(argc, argv);
+ RegexpTester form;
+<a name="x2511"></a> form.<a href="qdialog.html#show">show</a>();
+<a name="x2512"></a><a name="x2510"></a><a name="x2509"></a> app.<a href="qobject.html#connect">connect</a>(&amp;app, SIGNAL(<a href="qapplication.html#lastWindowClosed">lastWindowClosed</a>()), &amp;app, SLOT(<a href="qapplication.html#quit">quit</a>()));
+ return app.<a href="qapplication.html#exec">exec</a>();
+}
+</pre>
+
+<p>See also <a href="examples.html">Examples</a>.
+
+<!-- eof -->
+<p><address><hr><div align=center>
+<table width=100% cellspacing=0 border=0><tr>
+<td>Copyright &copy; 2007
+<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
+<td align=right><div align=right>Qt 3.3.8</div>
+</table></div></address></body>
+</html>