include/sge/gui/manager.hpp

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#ifndef SGE_GUI_MANAGER_HPP_INCLUDED
#define SGE_GUI_MANAGER_HPP_INCLUDED

#include "types.hpp"

#include "../renderer/device.hpp"
#include "../input/system.hpp"
#include "../font/system.hpp"
#include "../sprite/object.hpp"
#include "../sprite/system.hpp"
#include "../scoped_connection.hpp"
#include "../image/loader.hpp"
#include "../export.hpp"

namespace sge
{
namespace gui
{
// forward declaration
class widget;

class manager
{
    public:
    SGE_SYMBOL manager(renderer::device_ptr,image::loader_ptr,input::system_ptr,font::system_ptr);
    SGE_SYMBOL void invalidate(rect const &);
    SGE_SYMBOL void draw();
    font::metrics_ptr const standard_font() { return standard_font_; }
    renderer::color const standard_color() const { return standard_color_; }
    renderer::color const standard_color_focused() const { return standard_color_focused_; }

    private:
    friend class widget;

    struct widget_data
    {
        widget_data(
            widget&,
            renderer::texture_ptr,
            sprite::object const &);

        widget *ptr;
        renderer::texture_ptr texture;
        sprite::object spr;
    };
    typedef std::vector<widget_data> widget_container;
    typedef std::vector<rect> dirt_container;

    // engine relevant stuff
    renderer::device_ptr const rend;
    image::loader_ptr const il;
    input::system_ptr const is;
    font::system_ptr const fs;
    font::metrics_ptr const standard_font_;
    renderer::color const standard_color_;
    renderer::color const standard_color_focused_;
    scoped_connection ic;
    sprite::system ss;
    sge::sprite::object cursor;
    sge::sprite::point cursor_click;

    // other internal stuff
    widget_container widgets_;
    dirt_container dirt_;

    // focus
    widget *keyboard_focus;
    widget *mouse_focus;

    // this is called by widget's constructor and destructor
    void add(widget &);
    void remove(widget &);
    void compile(widget &);

    // this is called by widget's size/pos function (if it encounters a top level widget)
    void resize(widget &,dim const &);
    void reposition(widget &,point const &);

    // internal search functions (just convenience)
    widget_data &get_data(widget &);
    widget_container::iterator get_data_iterator(widget &);
    widget_data &parent_widget_data(widget &);
    void recalculate_mouse_focus();

    // registered input callback
    void input_callback(input::key_pair const &);

    void redraw_dirt();
};
}
}

#endif

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