stylesheeteditor.cpp Example File

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  #include <QtWidgets>

  #include "stylesheeteditor.h"

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

      QRegularExpression regExp("^.(.*)\\+?Style$");
      QString defaultStyle = QApplication::style()->metaObject()->className();
      QRegularExpressionMatch match = regExp.match(defaultStyle);

      if (match.hasMatch())
          defaultStyle = match.captured(1);

      ui.styleCombo->addItems(QStyleFactory::keys());
      ui.styleCombo->setCurrentIndex(ui.styleCombo->findText(defaultStyle, Qt::MatchContains));
      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 = QString::fromLatin1(file.readAll());

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