forked from 0ad/0ad
122 lines
2.8 KiB
C++
122 lines
2.8 KiB
C++
/*
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GUI Object - Drop Down (list)
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by Gustav Larsson
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gee@pyro.nu
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--Overview--
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Works just like a list-box, but it hides
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all the elements that aren't selected. They
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can be brought up by pressing the control.
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--More info--
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Check GUI.h
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*/
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#ifndef CDropDown_H
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#define CDropDown_H
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//--------------------------------------------------------
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// Includes / Compiler directives
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//--------------------------------------------------------
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#include "GUI.h"
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#include "CList.h"
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//class CList;
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//--------------------------------------------------------
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// Macros
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//--------------------------------------------------------
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//--------------------------------------------------------
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// Types
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//--------------------------------------------------------
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//--------------------------------------------------------
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// Declarations
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//--------------------------------------------------------
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/**
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* @author Gustav Larsson
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*
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* Drop Down
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*
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* The control can be pressed, but we will not inherent
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* this behavior from IGUIButtonBehavior, because when
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* you press this control, the list with elements will
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* immediately appear, and not first after release
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* (which is the whole gist of the IGUIButtonBehavior).
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*/
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class CDropDown : public CList
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{
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GUI_OBJECT(CDropDown)
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public:
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CDropDown();
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virtual ~CDropDown();
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// virtual void ResetStates() { IGUIButtonBehavior::ResetStates(); }
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/**
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* Handle Messages
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*
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* @param Message GUI Message
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*/
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virtual void HandleMessage(const SGUIMessage &Message);
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/**
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* Handle events manually to catch keyboard inputting.
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*/
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virtual InReaction ManuallyHandleEvent(const SDL_Event* ev);
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/**
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* Draws the Button
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*/
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virtual void Draw();
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// This is one of the few classes we actually need to redefine this function
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// this is because the size of the control changes whether it is open
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// or closed.
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virtual bool MouseOver();
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virtual float GetBufferedZ() const;
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protected:
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/**
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* Sets up text, should be called every time changes has been
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* made that can change the visual.
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*/
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void SetupText();
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// Sets up the cached GetListRect. Decided whether it should
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// have a scrollbar, and so on.
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virtual void SetupListRect();
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// Specify a new List rectangle.
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virtual CRect GetListRect() const;
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/**
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* Placement of text.
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*/
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CPos m_TextPos;
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// Is the dropdown opened?
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bool m_Open;
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// I didn't cache this at first, but it's just as easy as caching
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// m_CachedActualSize, so I thought, what the heck it's used a lot.
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CRect m_CachedListRect;
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// Hide scrollbar when it's not needed
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bool m_HideScrollBar;
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// Not necessarily the element that is selected, this is just
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// which element should be highlighted. When opening the dropdown
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// it is set to "selected", but then when moving the mouse it will
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// change.
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int m_ElementHighlight;
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};
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#endif
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