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   EVT_SIZE(wxPanel::OnSize)
  40 END_EVENT_TABLE()
  41
  42 #endif
  43
  44 void wxPanel::Init()
  45 {
  46     m_winLastFocused = (wxWindow *)NULL;
  47     m_btnDefault = (wxButton *)NULL;
  48 }
  49
  50 bool wxPanel::Create(wxWindow *parent, wxWindowID id,
  51                      const wxPoint& pos,
  52                      const wxSize& size,
  53                      long style,
  54                      const wxString& name)
  55 {
  56     bool ret = wxWindow::Create(parent, id, pos, size, style, name);
  57
  58     if ( ret )
  59     {
  60 #ifndef __WXGTK__
  61         SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  62         SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
  63 #endif
  64     }
  65
  66     return ret;
  67 }
  68
  69 void wxPanel::InitDialog(void)
  70 {
  71     wxInitDialogEvent event(GetId());
  72     event.SetEventObject(this);
  73     GetEventHandler()->ProcessEvent(event);
  74 }
  75
  76 // Responds to colour changes, and passes event on to children.
  77 void wxPanel::OnSysColourChanged(wxSysColourChangedEvent& event)
  78 {
  79     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  80     Refresh();
  81
  82     // Propagate the event to the non-top-level children
  83     wxWindow::OnSysColourChanged(event);
  84 }
  85
  86 void wxPanel::OnNavigationKey( wxNavigationKeyEvent& event )
  87 {
  88     // there is not much to do if we have only one child (or not at all)
  89     if (GetChildren().GetCount() < 2)
  90     {
  91         event.Skip();
  92         return;
  93     }
  94
  95     // don't process these ones here
  96     if (event.IsWindowChange())
  97     {
  98         event.Skip();
  99         return;
 100     }
 101
 102     wxWindow *winFocus = event.GetCurrentFocus();
 103     if (!winFocus)
 104         winFocus = wxWindow::FindFocus();
 105
 106     if (!winFocus)
 107     {
 108         event.Skip();
 109         return;
 110     }
 111
 112     wxWindowList::Node *start_node = GetChildren().Find( winFocus );
 113     if ( !start_node )
 114         start_node = GetChildren().Find( m_winLastFocused );
 115     if ( !start_node )
 116         start_node = GetChildren().GetFirst();
 117
 118     wxWindowList::Node *node = event.GetDirection() ? start_node->GetNext()
 119                                                     : start_node->GetPrevious();
 120
 121     while ( node != start_node )
 122     {
 123         if ( !node )
 124         {
 125             // check if our (may be grand) parent is another panel: if this is
 126             // the case, they will know what to do with this navigation key and
 127             // so give them the chance to process it instead of looping inside
 128             // this panel (normally, the focus will go to the next/previous
 129             // item after this panel in the parent panel)
 130             wxWindow *focussed_child_of_p = this;
 131             for ( wxWindow *p = GetParent(); p; p = p->GetParent() )
 132             {
 133                 // we don't want to tab into a different dialog or frame
 134                 if ( focussed_child_of_p->IsTopLevel() )
 135                     break;
 136
 137                 if ( wxDynamicCast(p, wxPanel) )
 138                 {
 139                     event.SetCurrentFocus( focussed_child_of_p );
 140                     if (p->GetEventHandler()->ProcessEvent( event ))
 141                         return;
 142                 }
 143                 focussed_child_of_p = p;
 144             }
 145
 146             // no, we are not inside another panel so process this ourself
 147             node = event.GetDirection() ? GetChildren().GetFirst()
 148                                         : GetChildren().GetLast();
 149
 150             continue;
 151         }
 152
 153         wxWindow *child = node->GetData();
 154
 155         if ( child->AcceptsFocus() )
 156         {
 157             // ok, event processed
 158             child->SetFocus();
 159             return;
 160         }
 161
 162         node = event.GetDirection() ? node->GetNext() : node->GetPrevious();
 163     }
 164
 165     // we cycled through all of our children and none of them wanted to accept
 166     // focus
 167     event.Skip();
 168 }
 169
 170
 171 void wxPanel::OnSize(wxSizeEvent& WXUNUSED(event))
 172 {
 173 #if wxUSE_CONSTRAINTS
 174     if (GetAutoLayout()) Layout();
 175 #endif
 176 }
 177
 178 void wxPanel::OnFocus(wxFocusEvent& event)
 179 {
 180     if ( m_winLastFocused )
 181     {
 182         // it might happen that the window got reparented...
 183         if ( m_winLastFocused->GetParent() != this )
 184             m_winLastFocused = (wxWindow *)NULL;
 185         else
 186             m_winLastFocused->SetFocus();
 187     }
 188     else
 189         event.Skip();
 190 }