2001-09-22 07:56:04 -04:00
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/////////////////////////////////////////////////////////////////////////////
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// Name: wx/univ/inpcons.h
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// Purpose: wxInputConsumer: mix-in class for input handling
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 14.08.00
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// RCS-ID: $Id$
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// Copyright: (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_UNIV_INPCONS_H_
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#define _WX_UNIV_INPCONS_H_
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#ifdef __GNUG__
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#pragma interface "inpcons.h"
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#endif
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class WXDLLEXPORT wxInputHandler;
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class WXDLLEXPORT wxWindow;
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#include "wx/object.h"
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#include "wx/event.h"
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// ----------------------------------------------------------------------------
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// wxControlAction: the action is currently just a string which identifies it,
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// later it might become an atom (i.e. an opaque handler to string).
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// ----------------------------------------------------------------------------
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typedef wxString wxControlAction;
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// the list of actions which apply to all controls (other actions are defined
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// in the controls headers)
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#define wxACTION_NONE _T("") // no action to perform
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// ----------------------------------------------------------------------------
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// wxInputConsumer: mix-in class for handling wxControlActions (used by
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// wxControl and wxTopLevelWindow).
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxInputConsumer
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{
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public:
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wxInputConsumer() { m_inputHandler = NULL; }
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// get the input handler
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wxInputHandler *GetInputHandler() const { return m_inputHandler; }
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// perform a control-dependent action: an action may have an optional
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// numeric and another (also optional) string argument whose interpretation
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// depends on the action
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//
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// NB: we might use ellipsis in PerformAction() declaration but this
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// wouldn't be more efficient than always passing 2 unused parameters
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// but would be more difficult. Another solution would be to have
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// several overloaded versions but this will expose the problem of
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// virtual function hiding we don't have here.
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virtual bool PerformAction(const wxControlAction& action,
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long numArg = -1l,
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const wxString& strArg = wxEmptyString);
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// get the window to work with (usually the class wxInputConsumer was mixed into)
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virtual wxWindow *GetInputWindow() const = 0;
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protected:
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// event handlers
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void OnMouse(wxMouseEvent& event);
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void OnKeyDown(wxKeyEvent& event);
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void OnKeyUp(wxKeyEvent& event);
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void OnFocus(wxFocusEvent& event);
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void OnActivate(wxActivateEvent& event);
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// create input handler by name
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void CreateInputHandler(const wxString& inphandler);
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// input processor (never deleted, the theme deletes it itself)
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wxInputHandler *m_inputHandler;
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};
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// ----------------------------------------------------------------------------
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// macros which must be used by the classes derived from wxInputConsumer mix-in
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// ----------------------------------------------------------------------------
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// declare the methods to be forwarded
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#define WX_DECLARE_INPUT_CONSUMER() \
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private: \
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void OnMouse(wxMouseEvent& event); \
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void OnKeyDown(wxKeyEvent& event); \
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void OnKeyUp(wxKeyEvent& event); \
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void OnFocus(wxFocusEvent& event); \
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2001-09-28 19:39:55 -04:00
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public: /* because of docview :-( */ \
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void OnActivate(wxActivateEvent& event); \
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private:
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2001-09-22 07:56:04 -04:00
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// implement the event table entries for wxControlContainer
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#define WX_EVENT_TABLE_INPUT_CONSUMER(classname) \
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EVT_KEY_DOWN(classname::OnKeyDown) \
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EVT_KEY_UP(classname::OnKeyUp) \
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EVT_MOUSE_EVENTS(classname::OnMouse) \
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EVT_SET_FOCUS(classname::OnFocus) \
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EVT_KILL_FOCUS(classname::OnFocus) \
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EVT_ACTIVATE(classname::OnActivate)
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// Forward event handlers to wxInputConsumer
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//
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// (We can't use them directly, because wxIC has virtual methods, which forces
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// the compiler to include (at least) two vtables into wxControl, one for the
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// wxWindow-wxControlBase-wxControl branch and one for the wxIC mix-in.
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// Consequently, the "this" pointer has different value when in wxControl's
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// and wxIC's method, even though the instance stays same. This doesn't matter
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// so far as member pointers aren't used, but that's not wxControl's case.
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// When we add an event table entry (= use a member pointer) pointing to
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// wxIC's OnXXX method, GCC compiles code that executes wxIC::OnXXX with the
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// version of "this" that belongs to wxControl, not wxIC! In our particular
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// case, the effect is that m_handler is NULL (probably same memory
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// area as the_other_vtable's_this->m_refObj) and input handling doesn't work.)
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#define WX_FORWARD_TO_INPUT_CONSUMER(classname) \
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void classname::OnMouse(wxMouseEvent& event) \
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{ \
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wxInputConsumer::OnMouse(event); \
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} \
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void classname::OnKeyDown(wxKeyEvent& event) \
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{ \
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wxInputConsumer::OnKeyDown(event); \
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} \
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void classname::OnKeyUp(wxKeyEvent& event) \
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{ \
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wxInputConsumer::OnKeyUp(event); \
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} \
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void classname::OnFocus(wxFocusEvent& event) \
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{ \
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wxInputConsumer::OnFocus(event); \
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} \
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void classname::OnActivate(wxActivateEvent& event) \
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{ \
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wxInputConsumer::OnActivate(event); \
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2001-09-28 19:39:55 -04:00
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} \
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2001-09-22 07:56:04 -04:00
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#endif // _WX_UNIV_INPCONS_H_
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