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