tb_popup_window.h

// ================================================================================
// ==      This file is a part of Turbo Badger. (C) 2011-2014, Emil Segerås      ==
// ==                     See tb_core.h for more information.                    ==
// ================================================================================

#ifndef TB_POPUP_WINDOW_H
#define TB_POPUP_WINDOW_H

#include "tb_window.h"
#include "tb_widgets_listener.h"

namespace tb {

class TBPopupAlignment
{
public:
    static const int UNSPECIFIED = TB_INVALID_DIMENSION;

    TBPopupAlignment(TB_ALIGN align = TB_ALIGN_BOTTOM)
        : pos_in_root(UNSPECIFIED, UNSPECIFIED)
        , align(align)
        , expand_to_target_width(true) {}

    TBPopupAlignment(const TBPoint &pos_in_root, TB_ALIGN align = TB_ALIGN_BOTTOM)
        : pos_in_root(pos_in_root)
        , align(align)
        , expand_to_target_width(true) {}

    TBPopupAlignment(const TBPoint &pos_in_root, const TBPoint &pos_offset)
        : pos_in_root(pos_in_root)
        , pos_offset(pos_offset)
        , align(TB_ALIGN_BOTTOM)
        , expand_to_target_width(true) {}

    TBRect GetAlignedRect(TBWidget *popup, TBWidget *target) const;

    TBPoint pos_in_root;
    TBPoint pos_offset;

    TB_ALIGN align;
    bool expand_to_target_width;
};

class TBPopupWindow : public TBWindow, private TBWidgetListener
{
public:
    // For safe typecasting
    TBOBJECT_SUBCLASS(TBPopupWindow, TBWindow);

    TBPopupWindow(TBWidget *target);
    ~TBPopupWindow();

    bool Show(const TBPopupAlignment &alignment);

    virtual TBWidget *GetEventDestination() { return m_target.Get(); }

    virtual bool OnEvent(const TBWidgetEvent &ev);
private:
    TBWidgetSafePointer m_target;
    // TBWidgetListener
    virtual void OnWidgetFocusChanged(TBWidget *widget, bool focused);
    virtual bool OnWidgetInvokeEvent(TBWidget *widget, const TBWidgetEvent &ev);
    virtual void OnWidgetDelete(TBWidget *widget);
    virtual bool OnWidgetDying(TBWidget *widget);
};

} // namespace tb

#endif // TB_POPUP_WINDOW_H