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     // also remove it from the list of parents children so that the loop in
  87     // wxWindowBase::DestroyChildren() eventually terminates
  88     if ( m_parent )
  89     {
  90         m_parent->RemoveChild(this);
  91
  92         // don't do it again in our dtor
  93         m_parent = NULL;
  94     }
  95
  96     return TRUE;
  97 }
  98
  99 bool wxTopLevelWindowBase::IsLastBeforeExit() const
 100 {
 101     // we exit the application if there are no more top level windows left
 102     // normally but wxApp can prevent this from happening
 103     return wxTopLevelWindows.GetCount() == 1 &&
 104             wxTopLevelWindows.GetFirst()->GetData() == (wxWindow *)this &&
 105             wxTheApp && wxTheApp->GetExitOnFrameDelete();
 106 }
 107
 108 // ----------------------------------------------------------------------------
 109 // wxTopLevelWindow geometry
 110 // ----------------------------------------------------------------------------
 111
 112 wxSize wxTopLevelWindowBase::GetMaxSize() const
 113 {
 114     wxSize  size( GetMaxWidth(), GetMaxHeight() );
 115     int     w, h;
 116
 117     wxClientDisplayRect( 0, 0, &w, &h );
 118
 119     if( size.GetWidth() == -1 )
 120         size.SetWidth( w );
 121
 122     if( size.GetHeight() == -1 )
 123         size.SetHeight( h );
 124
 125     return size;
 126 }
 127
 128 // ----------------------------------------------------------------------------
 129 // wxTopLevelWindow size management: we exclude the areas taken by
 130 // menu/status/toolbars from the client area, so the client area is what's
 131 // really available for the frame contents
 132 // ----------------------------------------------------------------------------
 133
 134 void wxTopLevelWindowBase::DoScreenToClient(int *x, int *y) const
 135 {
 136     wxWindow::DoScreenToClient(x, y);
 137
 138     // translate the wxWindow client coords to our client coords
 139     wxPoint pt(GetClientAreaOrigin());
 140     if ( x )
 141         *x -= pt.x;
 142     if ( y )
 143         *y -= pt.y;
 144 }
 145
 146 void wxTopLevelWindowBase::DoClientToScreen(int *x, int *y) const
 147 {
 148     // our client area origin (0, 0) may be really something like (0, 30) for
 149     // wxWindow if we have a toolbar, account for it before translating
 150     wxPoint pt(GetClientAreaOrigin());
 151     if ( x )
 152         *x += pt.x;
 153     if ( y )
 154         *y += pt.y;
 155
 156     wxWindow::DoClientToScreen(x, y);
 157 }
 158
 159
 160 // ----------------------------------------------------------------------------
 161 // event handlers
 162 // ----------------------------------------------------------------------------
 163
 164 // default resizing behaviour - if only ONE subwindow, resize to fill the
 165 // whole client area
 166 void wxTopLevelWindowBase::OnSize(wxSizeEvent& WXUNUSED(event))
 167 {
 168     // if we're using constraints or sizers - do use them
 169     if ( GetAutoLayout() )
 170     {
 171         Layout();
 172     }
 173     else
 174     {
 175         // do we have _exactly_ one child?
 176         wxWindow *child = (wxWindow *)NULL;
 177         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 178               node;
 179               node = node->GetNext() )
 180         {
 181             wxWindow *win = node->GetData();
 182
 183             // exclude top level and managed windows (status bar isn't
 184             // currently in the children list except under wxMac anyhow, but
 185             // it makes no harm to test for it)
 186             if ( !win->IsTopLevel() && !IsOneOfBars(win) )
 187             {
 188                 if ( child )
 189                 {
 190                     return;     // it's our second subwindow - nothing to do
 191                 }
 192
 193                 child = win;
 194             }
 195         }
 196
 197         // do we have any children at all?
 198         if ( child )
 199         {
 200             // exactly one child - set it's size to fill the whole frame
 201             int clientW, clientH;
 202             DoGetClientSize(&clientW, &clientH);
 203
 204             // for whatever reasons, wxGTK wants to have a small offset - it
 205             // probably looks better with it?
 206 #ifdef __WXGTK__
 207             static const int ofs = 1;
 208 #else
 209             static const int ofs = 0;
 210 #endif
 211
 212             child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);
 213         }
 214     }
 215 }
 216
 217 // The default implementation for the close window event.
 218 void wxTopLevelWindowBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 219 {
 220     Destroy();
 221 }
 222
 223 bool wxTopLevelWindowBase::SendIconizeEvent(bool iconized)
 224 {
 225     wxIconizeEvent event(GetId(), iconized);
 226     event.SetEventObject(this);
 227
 228     return GetEventHandler()->ProcessEvent(event);
 229 }
 230
 231 // do the window-specific processing after processing the update event
 232 void wxTopLevelWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
 233 {
 234     if ( event.GetSetEnabled() )
 235         Enable(event.GetEnabled());
 236
 237     if ( event.GetSetText() )
 238     {
 239         if ( event.GetText() != GetTitle() )
 240             SetTitle(event.GetText());
 241     }
 242 }
 243
 244 // vi:sts=4:sw=4:et