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 #ifndef __WXGTK__
  53     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  54     SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
  55 #endif
  56   }
  57
  58   return ret;
  59 }
  60
  61 void wxPanel::InitDialog(void)
  62 {
  63         wxInitDialogEvent event(GetId());
  64         event.SetEventObject(this);
  65         GetEventHandler()->ProcessEvent(event);
  66 }
  67
  68 void wxPanel::SetFocus()
  69 {
  70   SetFocusToNextChild();
  71 }
  72
  73 // Responds to colour changes, and passes event on to children.
  74 void wxPanel::OnSysColourChanged(wxSysColourChangedEvent& event)
  75 {
  76     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  77     Refresh();
  78
  79     // Propagate the event to the non-top-level children
  80     wxWindow::OnSysColourChanged(event);
  81 }
  82
  83 void wxPanel::OnNavigationKey(wxNavigationKeyEvent& event)
  84 {
  85   // don't process these ones here
  86   if ( event.IsWindowChange() ) {
  87     event.Skip();
  88     return;
  89   }
  90
  91   // first of all, find the window which currently has the focus
  92   wxNode *node = GetChildren()->First();
  93   wxWindow *winFocus = event.GetCurrentFocus();
  94
  95   // @@@ no FindFocus() in wxGTK
  96   #ifndef __WXGTK__
  97     if ( winFocus == NULL )
  98       winFocus = wxWindow::FindFocus();
  99   #endif
 100
 101   while ( node != NULL ) {
 102     if ( node->Data() == winFocus )
 103       break;
 104
 105     node = node->Next();
 106   }
 107
 108   if ( !SetFocusToNextChild(node, event.GetDirection()) )
 109     event.Skip();
 110 }
 111
 112 // set focus to the next child which accepts it (or first/last if node == NULL)
 113 bool wxPanel::SetFocusToNextChild(wxNode *node, bool bForward)
 114 {
 115   // @@ using typed list would be better...
 116   #define WIN(node) ((wxWindow *)(node->Data()))
 117
 118   bool bFound = FALSE;  // have we found a window we will set focus to?
 119
 120   wxList *children = GetChildren();
 121   if ( node == NULL ) {
 122     // we've never had focus before
 123     node = bForward ? children->First() : children->Last();
 124     if ( node == NULL ) {
 125       // no children
 126       return FALSE;
 127     }
 128
 129     bFound = WIN(node)->AcceptsFocus();
 130   }
 131 #if 0 // to restore when it will really work (now it's triggered all the time)
 132   else {
 133     // just to be sure it's the right one
 134     wxASSERT( WIN(node)->AcceptsFocus() );
 135   }
 136 #endif // 0
 137
 138   // find the next child which accepts focus
 139   bool bParentWantsIt = TRUE;
 140   while ( !bFound ) {
 141     node = bForward ? node->Next() : node->Previous();
 142     if ( node == NULL ) {
 143       if ( !bParentWantsIt ) {
 144         // we've already been here which means that we've done a whole
 145         // cycle without success - get out from the infinite loop
 146         return FALSE;
 147       }
 148
 149       // ask parent if he doesn't want to advance focus to the next panel
 150       if ( GetParent() != NULL ) {
 151         wxNavigationKeyEvent event;
 152         event.SetDirection(bForward);
 153         event.SetWindowChange(FALSE);
 154         event.SetCurrentFocus(this);
 155
 156         if ( GetParent()->ProcessEvent(event) )
 157           return TRUE;
 158       }
 159
 160       // a sentinel to avoid infinite loops
 161       bParentWantsIt = FALSE;
 162
 163       // wrap around
 164       node = bForward ? children->First() : children->Last();
 165     }
 166
 167     bFound = WIN(node)->AcceptsFocus();
 168   }
 169
 170   WIN(node)->SetFocus();
 171
 172   #undef WIN
 173
 174   return TRUE;
 175 }
 176