widgetspresenter.h

#ifndef QTMVVM_WIDGETSPRESENTER_H
#define QTMVVM_WIDGETSPRESENTER_H

#include <QtCore/qobject.h>
#include <QtCore/qscopedpointer.h>

#include <QtMvvmCore/ipresenter.h>
#include <QtMvvmCore/serviceregistry.h>

#include <QtWidgets/qwidget.h>

#include "QtMvvmWidgets/qtmvvmwidgets_global.h"
#include "QtMvvmWidgets/inputwidgetfactory.h"

namespace QtMvvm {

class WidgetsPresenterPrivate;
class Q_MVVMWIDGETS_EXPORT WidgetsPresenter : public QObject, public IPresenter
{
    Q_OBJECT
    Q_INTERFACES(QtMvvm::IPresenter)

    
    Q_PROPERTY(InputWidgetFactory* inputWidgetFactory READ inputWidgetFactory WRITE setInputWidgetFactory NOTIFY inputWidgetFactoryChanged)
    QTMVVM_INJECT(InputWidgetFactory*, inputWidgetFactory)

public:
    Q_INVOKABLE explicit WidgetsPresenter(QObject *parent = nullptr);
    ~WidgetsPresenter();

    template <typename TPresenter>
    static void registerAsPresenter();

    template <typename TView>
    static void registerView();
    static void registerView(const QMetaObject *viewType);

    template <typename TViewModel, typename TView>
    static void registerViewExplicitly();
    static void registerViewExplicitly(const QMetaObject *viewModelType, const QMetaObject *viewType);

    void present(ViewModel *viewModel, const QVariantHash &params, QPointer<ViewModel> parent) override;
    void showDialog(const MessageConfig &config, MessageResult *result) override;

    InputWidgetFactory* inputWidgetFactory() const;

public Q_SLOTS:
    void setInputWidgetFactory(InputWidgetFactory* inputWidgetFactory);

Q_SIGNALS:
    void inputWidgetFactoryChanged(InputWidgetFactory* inputWidgetFactory, QPrivateSignal);

protected:
    virtual const QMetaObject *findWidgetMetaObject(const QMetaObject *viewModelMetaObject);
    virtual bool tryPresent(QWidget *view, QWidget *parentView);

    virtual void showForeground(QWidget *view) const;

    virtual void presentMessageBox(const MessageConfig &config, QPointer<MessageResult> result);
    virtual void presentInputDialog(const MessageConfig &config, QPointer<MessageResult> result);
    virtual void presentFileDialog(const MessageConfig &config, QPointer<MessageResult> result);
    virtual void presentOtherDialog(const MessageConfig &config, QPointer<MessageResult> result);

private:
    QScopedPointer<WidgetsPresenterPrivate> d;
};

// ------------- Generic Implementation -------------

template<typename TPresenter>
void WidgetsPresenter::registerAsPresenter()
{
    static_assert(std::is_base_of<WidgetsPresenter, TPresenter>::value, "TPresenter must inherit QtMvvm::WidgetsPresenter!");
    ServiceRegistry::instance()->registerInterface<IPresenter, TPresenter>();
}

template<typename TView>
void WidgetsPresenter::registerView()
{
    static_assert(std::is_base_of<QWidget, TView>::value, "TWidget must inherit QWidget!");
    if(false) { //compile time check for the constructor
        Q_UNREACHABLE();
        Q_UNUSED(new TView(static_cast<ViewModel*>(nullptr), static_cast<QWidget*>(nullptr)))
    }
    registerView(&TView::staticMetaObject);
}

template<typename TViewModel, typename TView>
void WidgetsPresenter::registerViewExplicitly()
{
    static_assert(std::is_base_of<QWidget, TView>::value, "TWidget must inherit QWidget!");
    static_assert(std::is_base_of<ViewModel, TViewModel>::value, "TViewModel must inherit ViewModel!");
    if(false) { //compile time check for the constructor
        Q_UNREACHABLE();
        Q_UNUSED(new TView(static_cast<ViewModel*>(nullptr), static_cast<QWidget*>(nullptr)))
    }
    registerViewExplicitly(&TViewModel::staticMetaObject, &TView::staticMetaObject);
}

}

#endif // QTMVVM_WIDGETSPRESENTER_H