src/common/toplvcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/toplvcmn.cpp
   3 // Purpose:     common (for all platforms) wxTopLevelWindow functions
   4 // Author:      Julian Smart, Vadim Zeitlin
   5 // Created:     01/02/97
   6 // Id:          $Id$
   7 // Copyright:   (c) 1998 Robert Roebling and Julian Smart
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  20     #pragma implementation "toplevelbase.h"
  21 #endif
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27     #pragma hdrstop
  28 #endif
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/toplevel.h"
  32     #include "wx/dcclient.h"
  33     #include "wx/app.h"
  34 #endif // WX_PRECOMP
  35
  36 // ----------------------------------------------------------------------------
  37 // event table
  38 // ----------------------------------------------------------------------------
  39
  40 BEGIN_EVENT_TABLE(wxTopLevelWindowBase, wxWindow)
  41     EVT_CLOSE(wxTopLevelWindowBase::OnCloseWindow)
  42     EVT_SIZE(wxTopLevelWindowBase::OnSize)
  43 END_EVENT_TABLE()
  44
  45 // ============================================================================
  46 // implementation
  47 // ============================================================================
  48
  49 IMPLEMENT_DYNAMIC_CLASS(wxTopLevelWindow, wxWindow)
  50
  51 // ----------------------------------------------------------------------------
  52 // construction/destruction
  53 // ----------------------------------------------------------------------------
  54
  55 wxTopLevelWindowBase::wxTopLevelWindowBase()
  56 {
  57 }
  58
  59 wxTopLevelWindowBase::~wxTopLevelWindowBase()
  60 {
  61     // don't let wxTheApp keep any stale pointers to us
  62     if ( wxTheApp && wxTheApp->GetTopWindow() == this )
  63         wxTheApp->SetTopWindow(NULL);
  64
  65     bool shouldExit = IsLastBeforeExit();
  66
  67     wxTopLevelWindows.DeleteObject(this);
  68
  69     if ( shouldExit )
  70     {
  71         // then do it
  72         wxTheApp->ExitMainLoop();
  73     }
  74 }
  75
  76 bool wxTopLevelWindowBase::Destroy()
  77 {
  78     // delayed destruction: the frame will be deleted during the next idle
  79     // loop iteration
  80     if ( !wxPendingDelete.Member(this) )
  81         wxPendingDelete.Append(this);
  82
  83     // but hide it immediately
  84     Hide();
  85
  86     return TRUE;
  87 }
  88
  89 bool wxTopLevelWindowBase::IsLastBeforeExit() const
  90 {
  91     // we exit the application if there are no more top level windows left
  92     // normally but wxApp can prevent this from happening
  93     return wxTopLevelWindows.GetCount() == 1 &&
  94             wxTopLevelWindows.GetFirst()->GetData() == (wxWindow *)this &&
  95             wxTheApp && wxTheApp->GetExitOnFrameDelete();
  96 }
  97
  98 // ----------------------------------------------------------------------------
  99 // wxTopLevelWindow geometry
 100 // ----------------------------------------------------------------------------
 101
 102 wxSize wxTopLevelWindowBase::GetMaxSize() const
 103 {
 104     wxSize  size( GetMaxWidth(), GetMaxHeight() );
 105     int     w, h;
 106
 107     wxClientDisplayRect( 0, 0, &w, &h );
 108
 109     if( size.GetWidth() == -1 )
 110         size.SetWidth( w );
 111
 112     if( size.GetHeight() == -1 )
 113         size.SetHeight( h );
 114
 115     return size;
 116 }
 117
 118 // ----------------------------------------------------------------------------
 119 // wxTopLevelWindow size management: we exclude the areas taken by
 120 // menu/status/toolbars from the client area, so the client area is what's
 121 // really available for the frame contents
 122 // ----------------------------------------------------------------------------
 123
 124 void wxTopLevelWindowBase::DoScreenToClient(int *x, int *y) const
 125 {
 126     wxWindow::DoScreenToClient(x, y);
 127
 128     // translate the wxWindow client coords to our client coords
 129     wxPoint pt(GetClientAreaOrigin());
 130     if ( x )
 131         *x -= pt.x;
 132     if ( y )
 133         *y -= pt.y;
 134 }
 135
 136 void wxTopLevelWindowBase::DoClientToScreen(int *x, int *y) const
 137 {
 138     // our client area origin (0, 0) may be really something like (0, 30) for
 139     // wxWindow if we have a toolbar, account for it before translating
 140     wxPoint pt(GetClientAreaOrigin());
 141     if ( x )
 142         *x += pt.x;
 143     if ( y )
 144         *y += pt.y;
 145
 146     wxWindow::DoClientToScreen(x, y);
 147 }
 148
 149
 150 // ----------------------------------------------------------------------------
 151 // event handlers
 152 // ----------------------------------------------------------------------------
 153
 154 // default resizing behaviour - if only ONE subwindow, resize to fill the
 155 // whole client area
 156 void wxTopLevelWindowBase::OnSize(wxSizeEvent& WXUNUSED(event))
 157 {
 158     // if we're using constraints or sizers - do use them
 159     if ( GetAutoLayout() )
 160     {
 161         Layout();
 162     }
 163     else
 164     {
 165         // do we have _exactly_ one child?
 166         wxWindow *child = (wxWindow *)NULL;
 167         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 168               node;
 169               node = node->GetNext() )
 170         {
 171             wxWindow *win = node->GetData();
 172
 173             // exclude top level and managed windows (status bar isn't
 174             // currently in the children list except under wxMac anyhow, but
 175             // it makes no harm to test for it)
 176             if ( !win->IsTopLevel() && !IsOneOfBars(win) )
 177             {
 178                 if ( child )
 179                 {
 180                     return;     // it's our second subwindow - nothing to do
 181                 }
 182
 183                 child = win;
 184             }
 185         }
 186
 187         // do we have any children at all?
 188         if ( child )
 189         {
 190             // exactly one child - set it's size to fill the whole frame
 191             int clientW, clientH;
 192             DoGetClientSize(&clientW, &clientH);
 193
 194             // for whatever reasons, wxGTK wants to have a small offset - it
 195             // probably looks better with it?
 196 #ifdef __WXGTK__
 197             static const int ofs = 1;
 198 #else
 199             static const int ofs = 0;
 200 #endif
 201
 202             child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);
 203         }
 204     }
 205 }
 206
 207 // The default implementation for the close window event.
 208 void wxTopLevelWindowBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 209 {
 210     Destroy();
 211 }
 212
 213 bool wxTopLevelWindowBase::SendIconizeEvent(bool iconized)
 214 {
 215     wxIconizeEvent event(GetId(), iconized);
 216     event.SetEventObject(this);
 217
 218     return GetEventHandler()->ProcessEvent(event);
 219 }
 220
 221 // do the window-specific processing after processing the update event
 222 void wxTopLevelWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
 223 {
 224     if ( event.GetSetEnabled() )
 225         Enable(event.GetEnabled());
 226
 227     if ( event.GetSetText() )
 228     {
 229         if ( event.GetText() != GetTitle() )
 230             SetTitle(event.GetText());
 231     }
 232 }
 233
 234 // vi:sts=4:sw=4:et