qsettingswidget.h

#ifndef QSETTINGSWIDGET_H
#define QSETTINGSWIDGET_H

#include "qsettingsdialog_global.h"
#include <QWidget>
#include <QVariant>
#include <QRegularExpression>
#include "qsettingsentry.h"

class QSETTINGSDIALOGSHARED_EXPORT QSettingsWidgetBase
{
public:
    QSettingsWidgetBase();
    virtual ~QSettingsWidgetBase();

    virtual QWidget *asWidget() = 0;
    virtual void initialize(const UiPropertyMap &uiPropertyMap) = 0;

    virtual bool hasValueChanged() const;
    virtual void resetValueChanged();

    virtual void setValue(const QVariant &value) = 0;
    virtual QVariant getValue() const = 0;
    virtual void resetValue() = 0;

    virtual inline bool searchExpression(const QRegularExpression &regex) {
        return regex.pattern().isEmpty();
    }

private:
    QVariant changedCache;
};

template <class TWidget>
class QSettingsWidget : public TWidget, public QSettingsWidgetBase
{
public:
    inline QSettingsWidget(QWidget *parent = nullptr) :
        TWidget(parent),
        QSettingsWidgetBase()
    {}

    inline QWidget *asWidget() final {
        return this;
    }
    void initialize(const UiPropertyMap &uiPropertyMap) override {
        for(UiPropertyMap::const_iterator it = uiPropertyMap.constBegin(), end = uiPropertyMap.constEnd(); it != end; ++it)
            this->setProperty(it.key().toLocal8Bit().constData(), it.value());
    }
};

Q_DECLARE_METATYPE(QSettingsWidgetBase*)

#endif // QSETTINGSWIDGET_H