cmake-gui: Add regex explorer window

Source/QtDialog/RegexExplorer.h

@@ -0,0 +1,48 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2015 Kitware, Inc., Gregor Jasny
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+
+#ifndef RegexExplorer_h
+#define RegexExplorer_h
+
+#include <string>
+#include <cmsys/RegularExpression.hxx>
+#include <QDialog>
+
+#include "ui_RegexExplorer.h"
+
+class QString;
+class QWidget;
+
+class RegexExplorer : public QDialog, public Ui::RegexExplorer
+{
+  Q_OBJECT
+public:
+  RegexExplorer(QWidget* p);
+
+private slots:
+  void on_regularExpression_textChanged(const QString& text);
+  void on_inputText_textChanged();
+  void on_matchNumber_currentIndexChanged(int index);
+
+private:
+  static void setStatusColor(QWidget* widget, bool successful);
+  static bool stripEscapes(std::string& regex);
+
+  void clearMatch();
+
+  cmsys::RegularExpression m_regexParser;
+  std::string m_text;
+  std::string m_regex;
+  bool m_matched;
+};
+
+#endif