GuiContainer.h

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// Copyright © 2008-2021 Pioneer Developers. See AUTHORS.txt for details
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
 
#ifndef _GUICONTAINER_H
#define _GUICONTAINER_H
/*
 * Parent of all widgets that contain other widgets.
 */
 
#include "GuiWidget.h"
#include "graphics/Drawables.h"
#include <SDL_stdinc.h>
#include <list>
 
namespace Gui {
    class Container : public Widget {
    public:
        Container();
        virtual ~Container();
        bool OnMouseDown(MouseButtonEvent *e);
        bool OnMouseUp(MouseButtonEvent *e);
        bool OnMouseMotion(MouseMotionEvent *e);
        void RemoveAllChildren();
        void DeleteAllChildren();
        void GetChildPosition(const Widget *child, float outPos[2]) const;
        int GetNumChildren() { return static_cast<Uint32>(m_children.size()); }
        virtual void Draw();
        void ShowChildren();
        void HideChildren();
        virtual void Show();
        virtual void ShowAll();
        virtual void HideAll();
        virtual void OnChildResizeRequest(Widget *) = 0;
        void SetBgColor(const Color &col);
        void SetTransparency(bool a) { m_transparent = a; }
        virtual void UpdateAllChildSizes() = 0;
        void RemoveChild(Widget *w);
        // only fired if child widgets do not eat event
        sigc::signal<void, MouseButtonEvent *> onMouseButtonEvent;
 
    private:
        void _OnMouseLeave();
        void _OnSetSize();
        bool HandleMouseEvent(MouseButtonEvent *e);
        Color m_bgcol;
        bool m_transparent;
        std::unique_ptr<Graphics::Drawables::Rect> m_rect;
 
    protected:
        struct widget_pos {
            Widget *w;
            float pos[2];
            Uint32 flags;
        };
        typedef std::list<widget_pos> WidgetList;
 
        void PrependChild(Widget *w, float x, float y);
        void AppendChild(Widget *w, float x, float y);
        void MoveChild(Widget *w, float x, float y);
        WidgetList::const_iterator FindChild(const Widget *w) const;
        WidgetList::iterator FindChild(const Widget *w);
 
        WidgetList m_children;
    };
} // namespace Gui
 
#endif /* _GUICONTAINER_H */