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/object.h"
  25 #include "wx/font.h"
  26 #include "wx/colour.h"
  27 #include "wx/settings.h"
  28 #endif
  29
  30 #include "wx/generic/panelg.h"
  31
  32 #if !USE_SHARED_LIBRARY
  33 IMPLEMENT_DYNAMIC_CLASS(wxPanel, wxWindow)
  34
  35 BEGIN_EVENT_TABLE(wxPanel, wxWindow)
  36   EVT_SYS_COLOUR_CHANGED(wxPanel::OnSysColourChanged)
  37   EVT_SET_FOCUS(wxPanel::OnFocus)
  38   EVT_NAVIGATION_KEY(wxPanel::OnNavigationKey)
  39 END_EVENT_TABLE()
  40
  41 #endif
  42
  43 void wxPanel::Init()
  44 {
  45     m_winLastFocused = (wxWindow *)NULL;
  46     m_btnDefault = (wxButton *)NULL;
  47 }
  48
  49 bool wxPanel::Create(wxWindow *parent, wxWindowID id,
  50                      const wxPoint& pos,
  51                      const wxSize& size,
  52                      long style,
  53                      const wxString& name)
  54 {
  55     bool ret = wxWindow::Create(parent, id, pos, size, style, name);
  56
  57     if ( ret )
  58     {
  59 #ifndef __WXGTK__
  60         SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  61         SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
  62 #endif
  63     }
  64
  65     return ret;
  66 }
  67
  68 void wxPanel::InitDialog(void)
  69 {
  70     wxInitDialogEvent event(GetId());
  71     event.SetEventObject(this);
  72     GetEventHandler()->ProcessEvent(event);
  73 }
  74
  75 // Responds to colour changes, and passes event on to children.
  76 void wxPanel::OnSysColourChanged(wxSysColourChangedEvent& event)
  77 {
  78     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  79     Refresh();
  80
  81     // Propagate the event to the non-top-level children
  82     wxWindow::OnSysColourChanged(event);
  83 }
  84
  85 void wxPanel::OnNavigationKey( wxNavigationKeyEvent& event )
  86 {
  87     // there is not much to do if we have only one child (or not at all)
  88     if (GetChildren().GetCount() < 2)
  89     {
  90         event.Skip();
  91         return;
  92     }
  93
  94     // don't process these ones here
  95     if (event.IsWindowChange())
  96     {
  97         event.Skip();
  98         return;
  99     }
 100
 101     wxWindow *winFocus = event.GetCurrentFocus();
 102     if (!winFocus)
 103         winFocus = wxWindow::FindFocus();
 104
 105     if (!winFocus)
 106     {
 107         event.Skip();
 108         return;
 109     }
 110
 111     wxWindowList::Node *start_node = GetChildren().Find( winFocus );
 112     if ( !start_node )
 113         start_node = GetChildren().Find( m_winLastFocused );
 114     if ( !start_node )
 115         start_node = GetChildren().GetFirst();
 116
 117     wxWindowList::Node *node = event.GetDirection() ? start_node->GetNext()
 118                                                     : start_node->GetPrevious();
 119
 120     while ( node != start_node )
 121     {
 122         if ( !node )
 123         {
 124             // check if our (may be grand) parent is another panel: if this is
 125             // the case, they will know what to do with this navigation key and
 126             // so give them the chance to process it instead of looping inside
 127             // this panel (normally, the focus will go to the next/previous
 128             // item after this panel in the parent panel)
 129             wxWindow *focussed_child_of_p = this;
 130             for ( wxWindow *p = GetParent(); p; p = p->GetParent() )
 131             {
 132                 if ( wxDynamicCast(p, wxPanel) )
 133                 {
 134                     event.SetCurrentFocus( focussed_child_of_p );
 135                     if (p->GetEventHandler()->ProcessEvent( event ))
 136                         return;
 137                 }
 138                 focussed_child_of_p = p;
 139             }
 140
 141             // no, we are not inside another panel so process this ourself
 142             node = event.GetDirection() ? GetChildren().GetFirst()
 143                                         : GetChildren().GetLast();
 144
 145             continue;
 146         }
 147
 148         wxWindow *child = node->GetData();
 149
 150         if ( child->AcceptsFocus() )
 151         {
 152             // ok, event processed
 153             child->SetFocus();
 154             return;
 155         }
 156
 157         node = event.GetDirection() ? node->GetNext() : node->GetPrevious();
 158     }
 159
 160     // we cycled through all of our children and none of them wanted to accept
 161     // focus
 162     event.Skip();
 163 }
 164
 165 void wxPanel::OnFocus(wxFocusEvent& event)
 166 {
 167     if ( m_winLastFocused )
 168     {
 169         // it might happen that the window got reparented...
 170         if ( m_winLastFocused->GetParent() != this )
 171             m_winLastFocused = (wxWindow *)NULL;
 172         else
 173             m_winLastFocused->SetFocus();
 174     }
 175     else
 176         event.Skip();
 177 }