include/wx/containr.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/containr.h
   3 // Purpose:     wxControlContainer class declration: a "mix-in" class which
   4 //              implements the TAB navigation between the controls
   5 // Author:      Vadim Zeitlin
   6 // Modified by:
   7 // Created:     06.08.01
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
  10 // Licence:     wxWindows licence
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef _WX_CONTAINR_H_
  14 #define _WX_CONTAINR_H_
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "containr.h"
  18 #endif
  19
  20 class WXDLLEXPORT wxFocusEvent;
  21 class WXDLLEXPORT wxNavigationKeyEvent;
  22 class WXDLLEXPORT wxWindow;
  23
  24 /*
  25    Implementation note: wxControlContainer is not a real mix-in but rather
  26    a class meant to be agregated with (and not inherited from). Although
  27    logically it should be a mix-in, doing it like this has no advantage from
  28    the point of view of the existing code but does have some problems (we'd
  29    need to play tricks with event handlers which may be difficult to do
  30    safely). The price we pay for this simplicity is the ugly macros below.
  31  */
  32
  33 // ----------------------------------------------------------------------------
  34 // wxControlContainer
  35 // ----------------------------------------------------------------------------
  36
  37 class WXDLLEXPORT wxControlContainer
  38 {
  39 public:
  40     // ctors and such
  41     wxControlContainer(wxWindow *winParent);
  42
  43     wxWindow *GetDefaultItem() const { return m_winDefault; }
  44     wxWindow *SetDefaultItem(wxWindow *win)
  45         { wxWindow *winOld = m_winDefault; m_winDefault = win; return winOld; }
  46
  47     void SetLastFocus(wxWindow *win);
  48
  49     // the methods to be called from the window event handlers
  50     void HandleOnNavigationKey(wxNavigationKeyEvent& event);
  51     void HandleOnFocus(wxFocusEvent& event);
  52     void HandleOnWindowDestroy(wxWindowBase *child);
  53
  54     // should be called from SetFocus()
  55     void DoSetFocus();
  56
  57 protected:
  58     // set the focus to the child which had it the last time
  59     bool SetFocusToChild();
  60
  61     // the parent window we manage the children for
  62     wxWindow *m_winParent;
  63
  64     // the child which had the focus last time this panel was activated
  65     wxWindow *m_winLastFocused;
  66
  67     // a default window (e.g. a button) or NULL
  68     wxWindow *m_winDefault;
  69 };
  70
  71 // this function is for wxWindows internal use only
  72 extern bool wxSetFocusToChild(wxWindow *win, wxWindow **child);
  73
  74 // ----------------------------------------------------------------------------
  75 // macros which may be used by the classes wishing to implement TAB navigation
  76 // among their children
  77 // ----------------------------------------------------------------------------
  78
  79 // declare the methods to be forwarded
  80 #define WX_DECLARE_CONTROL_CONTAINER() \
  81     void OnNavigationKey(wxNavigationKeyEvent& event); \
  82     void OnFocus(wxFocusEvent& event); \
  83     virtual void OnChildFocus(wxChildFocusEvent& event); \
  84     virtual void SetFocus(); \
  85     virtual void RemoveChild(wxWindowBase *child); \
  86     virtual wxWindow *GetDefaultItem() const; \
  87     virtual wxWindow *SetDefaultItem(wxWindow *child) \
  88
  89 // implement the event table entries for wxControlContainer
  90 #define WX_EVENT_TABLE_CONTROL_CONTAINER(classname) \
  91     EVT_SET_FOCUS(classname::OnFocus) \
  92     EVT_CHILD_FOCUS(classname::OnChildFocus) \
  93     EVT_NAVIGATION_KEY(classname::OnNavigationKey)
  94
  95 // implement the methods forwarding to the wxControlContainer
  96 #define WX_DELEGATE_TO_CONTROL_CONTAINER(classname, container)  \
  97 wxWindow *classname::SetDefaultItem(wxWindow *child) \
  98 { \
  99     return container->SetDefaultItem(child); \
 100 } \
 101  \
 102 wxWindow *classname::GetDefaultItem() const \
 103 { \
 104     return container->GetDefaultItem(); \
 105 } \
 106  \
 107 void classname::OnNavigationKey( wxNavigationKeyEvent& event ) \
 108 { \
 109     container->HandleOnNavigationKey(event); \
 110 } \
 111  \
 112 void classname::RemoveChild(wxWindowBase *child) \
 113 { \
 114     container->HandleOnWindowDestroy(child); \
 115  \
 116     wxWindow::RemoveChild(child); \
 117 } \
 118  \
 119 void classname::SetFocus() \
 120 { \
 121     container->DoSetFocus(); \
 122 } \
 123  \
 124 void classname::OnChildFocus(wxChildFocusEvent& event) \
 125 { \
 126     container->SetLastFocus(event.GetWindow()); \
 127 } \
 128  \
 129 void classname::OnFocus(wxFocusEvent& event) \
 130 { \
 131     container->HandleOnFocus(event); \
 132 }
 133
 134
 135 #endif // _WX_CONTAINR_H_