tgscreen.h

#pragma once
 
#include <QObject>
#include <QPointer>
#include <QList>
#include <QSize>
#include <QRect>
#include <QTimer>
 
#include "utils/tghelpers.h"
 
namespace Tg {
class Terminal;
 
class Screen : public QObject
{
    Q_OBJECT
 
    Q_PROPERTY(QSize size READ size NOTIFY sizeChanged)
 
    
    Q_PROPERTY(bool canDragWidgets READ canDragWidgets WRITE setCanDragWidgets NOTIFY canDragWidgetsChanged)
 
    friend class Widget;
 
public:
    Screen(QObject *parent = nullptr, const StylePointer &style = nullptr);
 
    QSize size() const;
 
    StylePointer style() const;
 
    bool canDragWidgets() const;
 
public slots:
    void scheduleRedraw(const RedrawType type, const Widget *widget);
 
    void moveFocusToPreviousWidget();
 
    void moveFocusToNextWidget();
 
    void setCanDragWidgets(const bool canDragWidgets);
 
signals:
    void sizeChanged(const QSize &size) const;
 
    void canDragWidgetsChanged(const bool canDragWidgets) const;
 
private slots:
    void draw();
    void checkKeyboard();
    void setSize(const QSize &size);
 
private:
    enum class DragType {
        Unknown,
        Move,
        Resize
    };
 
    void registerWidget(Widget *widget);
    void deregisterWidget(Widget *widget);
 
    void updateRedrawRegions(const RedrawType type, const Widget *widget);
    void updateRedrawRegion(const QRect &region);
 
    void compressRedraws();
    void setActiveFocusWidget(const WidgetPointer &widget);
    void clearActiveFocusWidget();
 
    void handleDrag(const QPoint &point, const bool isPressActive);
 
    QTimer _keyboardTimer;
    QTimer _redrawTimer;
    QVector<QRect> _redrawRegions;
    QSize _size;
 
    WidgetList _widgets;
    WidgetPointer _activeFocusWidget;
    StylePointer _style;
    QPointer<Terminal> _terminal;
 
    bool _canDragWidgets = true;
    DragType _dragType = DragType::Unknown;
    WidgetPointer _dragWidget;
    QPoint _dragRelativePosition;
};
}