tictactoeplugin.h Example File

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#ifndef TICTACTOEPLUGIN_H
#define TICTACTOEPLUGIN_H

#include <QtUiPlugin/QDesignerCustomWidgetInterface>

class QIcon;
class QWidget;

class TicTacToePlugin : public QObject, public QDesignerCustomWidgetInterface
{
    Q_OBJECT
    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QDesignerCustomWidgetInterface")
    Q_INTERFACES(QDesignerCustomWidgetInterface)

public:
    explicit TicTacToePlugin(QObject *parent = nullptr);

    QString name() const override;
    QString group() const override;
    QString toolTip() const override;
    QString whatsThis() const override;
    QString includeFile() const override;
    QIcon icon() const override;
    bool isContainer() const override;
    QWidget *createWidget(QWidget *parent) override;
    bool isInitialized() const override;
    void initialize(QDesignerFormEditorInterface *formEditor) override;
    QString domXml() const override;

private:
    bool initialized = false;
};

#endif