qqmlmvvmbinding.h

#ifndef QTMVVM_QQMLMVVMBINDING_H
#define QTMVVM_QQMLMVVMBINDING_H

#include <QtCore/QObject>
#include <QtQml/QQmlParserStatus>

#include <QtMvvmCore/Binding>

#ifdef DOXYGEN_RUN
namespace de::skycoder42::QtMvvm::Core {

class MvvmBinding : public QtObject
#else
namespace QtMvvm {

class QQmlMvvmBinding : public QObject, public QQmlParserStatus
#endif
{
    Q_OBJECT
    Q_INTERFACES(QQmlParserStatus)

    
    Q_PROPERTY(QObject* viewModel MEMBER _viewModel NOTIFY viewModelChanged)
    Q_PROPERTY(QString viewModelProperty MEMBER _viewModelProperty NOTIFY viewModelPropertyChanged)
    Q_PROPERTY(QObject* view MEMBER _view NOTIFY viewChanged)
    Q_PROPERTY(QString viewProperty MEMBER _viewProperty NOTIFY viewPropertyChanged)
    Q_PROPERTY(QString viewModelChangeSignal MEMBER _viewModelChangeSignal NOTIFY viewModelChangeSignalChanged)
    Q_PROPERTY(QString viewChangeSignal MEMBER _viewChangeSignal NOTIFY viewChangeSignalChanged)
    Q_PROPERTY(BindingDirection type READ type WRITE setType NOTIFY typeChanged) //MEMBER is broken for flags

public:
    enum BindingDirectionFlag { //copy flags from binding
        SingleInit = Binding::SingleInit, 
        OneWayToView = Binding::OneWayToView, 
        OneWayToViewModel = Binding::OneWayToViewModel, 
        TwoWay = Binding::TwoWay 
    };
    Q_DECLARE_FLAGS(BindingDirection, BindingDirectionFlag)
    Q_FLAG(BindingDirection)

    
    explicit QQmlMvvmBinding(QObject *parent = nullptr);

    void classBegin() override;
    void componentComplete() override;

    BindingDirection type() const;
    Q_INVOKABLE bool isValid() const;

#ifdef DOXYGEN_RUN
public:
#else
public Q_SLOTS:
#endif
    void setType(BindingDirection type);
    void unbind();

Q_SIGNALS:
    void viewModelChanged(QObject* viewModel);
    void viewModelPropertyChanged(const QString &viewModelProperty);
    void viewChanged(QObject* view);
    void viewPropertyChanged(const QString &viewProperty);
    void typeChanged(BindingDirection type);
    void viewModelChangeSignalChanged(const QString &viewModelChangeSignal);
    void viewChangeSignalChanged(const QString &viewChangeSignal);

private Q_SLOTS:
    void resetBinding();

    void viewWasSet();
    void viewModelWasSet();

private:
    Binding _binding;
    bool _completed = false;
    bool _viewSet = false;
    bool _viewModelSet = false;

    QObject* _viewModel = nullptr;
    QString _viewModelProperty;
    QObject* _view = nullptr;
    QString _viewProperty;
    BindingDirection _type = TwoWay;
    QString _viewModelChangeSignal;
    QString _viewChangeSignal;
};

}

#endif // QTMVVM_QQMLMVVMBINDING_H