src/generic/panelg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        panelg.cpp
   3 // Purpose:     wxPanel
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "panelg.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/settings.h"
  25 #endif
  26
  27 #include "wx/generic/panelg.h"
  28
  29 #if !USE_SHARED_LIBRARY
  30 IMPLEMENT_DYNAMIC_CLASS(wxPanel, wxWindow)
  31
  32 BEGIN_EVENT_TABLE(wxPanel, wxWindow)
  33   EVT_SYS_COLOUR_CHANGED(wxPanel::OnSysColourChanged)
  34   EVT_NAVIGATION_KEY(wxPanel::OnNavigationKey)
  35 END_EVENT_TABLE()
  36
  37 #endif
  38
  39 wxPanel::wxPanel()
  40 {
  41 }
  42
  43 bool wxPanel::Create(wxWindow *parent, wxWindowID id,
  44                      const wxPoint& pos,
  45                      const wxSize& size,
  46                      long style,
  47                      const wxString& name)
  48 {
  49   bool ret = wxWindow::Create(parent, id, pos, size, style, name);
  50
  51   if ( ret ) {
  52     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  53     SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
  54   }
  55
  56   return ret;
  57 }
  58
  59 void wxPanel::InitDialog(void)
  60 {
  61         wxInitDialogEvent event(GetId());
  62         event.SetEventObject(this);
  63         GetEventHandler()->ProcessEvent(event);
  64 }
  65
  66 void wxPanel::SetFocus()
  67 {
  68   SetFocusToNextChild();
  69 }
  70
  71 // Responds to colour changes, and passes event on to children.
  72 void wxPanel::OnSysColourChanged(wxSysColourChangedEvent& event)
  73 {
  74     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  75     Refresh();
  76
  77     // Propagate the event to the non-top-level children
  78     wxWindow::OnSysColourChanged(event);
  79 }
  80
  81 void wxPanel::OnNavigationKey(wxNavigationKeyEvent& event)
  82 {
  83   // don't process these ones here
  84   if ( event.IsWindowChange() ) {
  85     event.Skip();
  86     return;
  87   }
  88
  89   // first of all, find the window which currently has the focus
  90   wxNode *node = GetChildren()->First();
  91   wxWindow *winFocus = event.GetCurrentFocus();
  92
  93   // @@@ no FindFocus() in wxGTK
  94   #ifndef __WXGTK__
  95     if ( winFocus == NULL )
  96       winFocus = wxWindow::FindFocus();
  97   #endif
  98
  99   while ( node != NULL ) {
 100     if ( node->Data() == winFocus )
 101       break;
 102
 103     node = node->Next();
 104   }
 105
 106   if ( !SetFocusToNextChild(node, event.GetDirection()) )
 107     event.Skip();
 108 }
 109
 110 // set focus to the next child which accepts it (or first/last if node == NULL)
 111 bool wxPanel::SetFocusToNextChild(wxNode *node, bool bForward)
 112 {
 113   // @@ using typed list would be better...
 114   #define WIN(node) ((wxWindow *)(node->Data()))
 115
 116   bool bFound = FALSE;  // have we found a window we will set focus to?
 117
 118   wxList *children = GetChildren();
 119   if ( node == NULL ) {
 120     // we've never had focus before
 121     node = bForward ? children->First() : children->Last();
 122     if ( node == NULL ) {
 123       // no children
 124       return FALSE;
 125     }
 126
 127     bFound = WIN(node)->AcceptsFocus();
 128   }
 129 #if 0 // to restore when it will really work (now it's triggered all the time)
 130   else {
 131     // just to be sure it's the right one
 132     wxASSERT( WIN(node)->AcceptsFocus() );
 133   }
 134 #endif // 0
 135
 136   // find the next child which accepts focus
 137   bool bParentWantsIt = TRUE;
 138   while ( !bFound ) {
 139     node = bForward ? node->Next() : node->Previous();
 140     if ( node == NULL ) {
 141       if ( !bParentWantsIt ) {
 142         // we've already been here which means that we've done a whole
 143         // cycle without success - get out from the infinite loop
 144         return FALSE;
 145       }
 146
 147       // ask parent if he doesn't want to advance focus to the next panel
 148       if ( GetParent() != NULL ) {
 149         wxNavigationKeyEvent event;
 150         event.SetDirection(bForward);
 151         event.SetWindowChange(FALSE);
 152         event.SetCurrentFocus(this);
 153
 154         if ( GetParent()->ProcessEvent(event) )
 155           return TRUE;
 156       }
 157
 158       // a sentinel to avoid infinite loops
 159       bParentWantsIt = FALSE;
 160
 161       // wrap around
 162       node = bForward ? children->First() : children->Last();
 163     }
 164
 165     bFound = WIN(node)->AcceptsFocus();
 166   }
 167
 168   WIN(node)->SetFocus();
 169
 170   #undef WIN
 171
 172   return TRUE;
 173 }