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# stylesheeteditor.cpp Example File
widgets/stylesheet/stylesheeteditor.cpp

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     #include <QtGui>

     #include "stylesheeteditor.h"

     StyleSheetEditor::StyleSheetEditor(QWidget *parent)
         : QDialog(parent)
     {
         ui.setupUi(this);

         QRegExp regExp("Q(.*)Style");
         QString defaultStyle = QApplication::style()->metaObject()->className();

         if (defaultStyle == QLatin1String("QMacStyle"))
             defaultStyle = QLatin1String("Macintosh (Aqua)");
         else if (regExp.exactMatch(defaultStyle))
             defaultStyle = regExp.cap(1);

         ui.styleCombo->addItems(QStyleFactory::keys());
         ui.styleCombo->setCurrentIndex(ui.styleCombo->findText(defaultStyle));
         ui.styleSheetCombo->setCurrentIndex(ui.styleSheetCombo->findText("Coffee"));
         loadStyleSheet("Coffee");
     }

     void StyleSheetEditor::on_styleCombo_activated(const QString &styleName)
     {
         qApp->setStyle(styleName);
         ui.applyButton->setEnabled(false);
     }

     void StyleSheetEditor::on_styleSheetCombo_activated(const QString &sheetName)
     {
         loadStyleSheet(sheetName);
     }

     void StyleSheetEditor::on_styleTextEdit_textChanged()
     {
         ui.applyButton->setEnabled(true);
     }

     void StyleSheetEditor::on_applyButton_clicked()
     {
         qApp->setStyleSheet(ui.styleTextEdit->toPlainText());
         ui.applyButton->setEnabled(false);
     }

     void StyleSheetEditor::loadStyleSheet(const QString &sheetName)
     {
         QFile file(":/qss/" + sheetName.toLower() + ".qss");
         file.open(QFile::ReadOnly);
         QString styleSheet = QLatin1String(file.readAll());

         ui.styleTextEdit->setPlainText(styleSheet);
         qApp->setStyleSheet(styleSheet);
         ui.applyButton->setEnabled(false);
     }