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);
}