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     if (wxTopLevelWindows.GetCount() > 1)
  84     {
  85         // Hide it immediately. This should
  86         // not be done if this TLW is the
  87         // only one left since we then would
  88         // risk not to get any idle events
  89         // at all anymore during which we
  90         // could delete any pending events.
  91         Hide();
  92     }
  93
  94     return TRUE;
  95 }
  96
  97 bool wxTopLevelWindowBase::IsLastBeforeExit() const
  98 {
  99     // we exit the application if there are no more top level windows left
 100     // normally but wxApp can prevent this from happening
 101     return wxTopLevelWindows.GetCount() == 1 &&
 102             wxTopLevelWindows.GetFirst()->GetData() == (wxWindow *)this &&
 103             wxTheApp && wxTheApp->GetExitOnFrameDelete();
 104 }
 105
 106 // ----------------------------------------------------------------------------
 107 // wxTopLevelWindow geometry
 108 // ----------------------------------------------------------------------------
 109
 110 wxSize wxTopLevelWindowBase::GetMaxSize() const
 111 {
 112     wxSize  size( GetMaxWidth(), GetMaxHeight() );
 113     int     w, h;
 114
 115     wxClientDisplayRect( 0, 0, &w, &h );
 116
 117     if( size.GetWidth() == -1 )
 118         size.SetWidth( w );
 119
 120     if( size.GetHeight() == -1 )
 121         size.SetHeight( h );
 122
 123     return size;
 124 }
 125
 126 // ----------------------------------------------------------------------------
 127 // wxTopLevelWindow size management: we exclude the areas taken by
 128 // menu/status/toolbars from the client area, so the client area is what's
 129 // really available for the frame contents
 130 // ----------------------------------------------------------------------------
 131
 132 void wxTopLevelWindowBase::DoScreenToClient(int *x, int *y) const
 133 {
 134     wxWindow::DoScreenToClient(x, y);
 135
 136     // translate the wxWindow client coords to our client coords
 137     wxPoint pt(GetClientAreaOrigin());
 138     if ( x )
 139         *x -= pt.x;
 140     if ( y )
 141         *y -= pt.y;
 142 }
 143
 144 void wxTopLevelWindowBase::DoClientToScreen(int *x, int *y) const
 145 {
 146     // our client area origin (0, 0) may be really something like (0, 30) for
 147     // wxWindow if we have a toolbar, account for it before translating
 148     wxPoint pt(GetClientAreaOrigin());
 149     if ( x )
 150         *x += pt.x;
 151     if ( y )
 152         *y += pt.y;
 153
 154     wxWindow::DoClientToScreen(x, y);
 155 }
 156
 157
 158 // ----------------------------------------------------------------------------
 159 // event handlers
 160 // ----------------------------------------------------------------------------
 161
 162 // default resizing behaviour - if only ONE subwindow, resize to fill the
 163 // whole client area
 164 void wxTopLevelWindowBase::OnSize(wxSizeEvent& WXUNUSED(event))
 165 {
 166     // if we're using constraints or sizers - do use them
 167     if ( GetAutoLayout() )
 168     {
 169         Layout();
 170     }
 171     else
 172     {
 173         // do we have _exactly_ one child?
 174         wxWindow *child = (wxWindow *)NULL;
 175         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 176               node;
 177               node = node->GetNext() )
 178         {
 179             wxWindow *win = node->GetData();
 180
 181             // exclude top level and managed windows (status bar isn't
 182             // currently in the children list except under wxMac anyhow, but
 183             // it makes no harm to test for it)
 184             if ( !win->IsTopLevel() && !IsOneOfBars(win) )
 185             {
 186                 if ( child )
 187                 {
 188                     return;     // it's our second subwindow - nothing to do
 189                 }
 190
 191                 child = win;
 192             }
 193         }
 194
 195         // do we have any children at all?
 196         if ( child )
 197         {
 198             // exactly one child - set it's size to fill the whole frame
 199             int clientW, clientH;
 200             DoGetClientSize(&clientW, &clientH);
 201
 202             // for whatever reasons, wxGTK wants to have a small offset - it
 203             // probably looks better with it?
 204 #ifdef __WXGTK__
 205             static const int ofs = 1;
 206 #else
 207             static const int ofs = 0;
 208 #endif
 209
 210             child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);
 211         }
 212     }
 213 }
 214
 215 // The default implementation for the close window event.
 216 void wxTopLevelWindowBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 217 {
 218     Destroy();
 219 }
 220
 221 bool wxTopLevelWindowBase::SendIconizeEvent(bool iconized)
 222 {
 223     wxIconizeEvent event(GetId(), iconized);
 224     event.SetEventObject(this);
 225
 226     return GetEventHandler()->ProcessEvent(event);
 227 }
 228
 229 // do the window-specific processing after processing the update event
 230 void wxTopLevelWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
 231 {
 232     if ( event.GetSetEnabled() )
 233         Enable(event.GetEnabled());
 234
 235     if ( event.GetSetText() )
 236     {
 237         if ( event.GetText() != GetTitle() )
 238             SetTitle(event.GetText());
 239     }
 240 }
 241
 242 // vi:sts=4:sw=4:et