Widget.hpp

#pragma once

#include <opencv2/core.hpp>
#include <vector>
#include <list>
#include <mutex>

#if defined(wxUSE_GUI)
#include <wx/gdicmn.h>
#elif defined(QT_GUI_LIB)
#include <QPoint>
#endif


namespace xv {

#if defined(wxUSE_GUI)
    typedef wxPoint gui_point_t;
#elif defined(QT_GUI_LIB)
    typedef QPoint gui_point_t;
#endif

    class Point;
    class ImagePanel;
    class Image;
    int distance(gui_point_t, gui_point_t);


class Widget{
    friend ImagePanel;
public:
    virtual void addChild(Widget &, bool readOnly = true);

    virtual void render(const cv::Mat&);

    virtual void paint(const cv::Mat&) = 0;

    virtual bool contains(const gui_point_t&);

    virtual void onMouseDown(const gui_point_t&);

    virtual void onMouseMove(const gui_point_t&);

    virtual void onMouseUp(const gui_point_t&);

    void startDragging(){ m_dragging = true; };

    void stopDragging(){ m_dragging = false; };

    bool isDragging(){ return m_dragging; };

    virtual void setMouseOver(bool mouseOver){ m_mouseOver = mouseOver; };

    virtual bool isMouseOver(){ return m_mouseOver; };

    virtual bool isReadOnly(){ return m_readonly; };

    virtual void setPosition(gui_point_t position);

    virtual gui_point_t position();

    bool isMouseOverButton(gui_point_t mousePosition, gui_point_t buttonPosition);

    void hide();

protected:
    std::list<Widget*> m_children;

    static const int LINE_THICKNESS;

    static const int MARGIN;

    static const int BUTTON_RADIUS;

    static const gui_point_t OK_POSITION;

    static const gui_point_t CANCEL_POSITION;

    static const cv::Scalar FOREGROUND_COLOR;

    static const cv::Scalar HIGHLIGHT_COLOR;

    static const cv::Scalar AFFIRMATIVE_COLOR;

    static const cv::Scalar NEGATIVE_COLOR;

    virtual ~Widget() = 0;

    Widget *m_parent = NULL;

    std::vector<gui_point_t> m_contour;

    bool m_dragging = false;  
    bool m_canceling = false;  
    bool m_accepting = false;  
    bool m_mouseOver = false; 
    bool m_undefined = false; 
    bool m_positioned = false;
    bool m_readonly = false; 
    gui_point_t m_position; 
private:
    virtual void paintButtons(const cv::Mat&);
    
};

}