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     // Unlike windows, top level windows are created hidden by default.
  58     m_isShown = false;
  59 }
  60
  61 wxTopLevelWindowBase::~wxTopLevelWindowBase()
  62 {
  63     // don't let wxTheApp keep any stale pointers to us
  64     if ( wxTheApp && wxTheApp->GetTopWindow() == this )
  65         wxTheApp->SetTopWindow(NULL);
  66
  67     bool shouldExit = IsLastBeforeExit();
  68
  69     wxTopLevelWindows.DeleteObject(this);
  70
  71     if ( shouldExit )
  72     {
  73         // then do it
  74         wxTheApp->ExitMainLoop();
  75     }
  76 }
  77
  78 bool wxTopLevelWindowBase::Destroy()
  79 {
  80     // delayed destruction: the frame will be deleted during the next idle
  81     // loop iteration
  82     if ( !wxPendingDelete.Member(this) )
  83         wxPendingDelete.Append(this);
  84
  85     if (wxTopLevelWindows.GetCount() > 1)
  86     {
  87         // Hide it immediately. This should
  88         // not be done if this TLW is the
  89         // only one left since we then would
  90         // risk not to get any idle events
  91         // at all anymore during which we
  92         // could delete any pending events.
  93         Hide();
  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() == wxDefaultCoord )
 120         size.SetWidth( w );
 121
 122     if( size.GetHeight() == wxDefaultCoord )
 123         size.SetHeight( h );
 124
 125     return size;
 126 }
 127
 128 /* static */
 129 wxSize wxTopLevelWindowBase::GetDefaultSize()
 130 {
 131     wxSize size = wxGetClientDisplayRect().GetSize();
 132
 133     // create proportionally bigger windows on small screens
 134     if ( size.x >= 1024 )
 135         size.x = 400;
 136     else if ( size.x >= 800 )
 137         size.x = 300;
 138     else if ( size.x >= 320 )
 139         size.x = 240;
 140
 141     if ( size.y >= 768 )
 142         size.y = 250;
 143     else if ( size.y > 200 )
 144     {
 145         size.y *= 2;
 146         size.y /= 3;
 147     }
 148
 149     return size;
 150 }
 151
 152 // ----------------------------------------------------------------------------
 153 // wxTopLevelWindow size management: we exclude the areas taken by
 154 // menu/status/toolbars from the client area, so the client area is what's
 155 // really available for the frame contents
 156 // ----------------------------------------------------------------------------
 157
 158 void wxTopLevelWindowBase::DoScreenToClient(int *x, int *y) const
 159 {
 160     wxWindow::DoScreenToClient(x, y);
 161
 162     // translate the wxWindow client coords to our client coords
 163     wxPoint pt(GetClientAreaOrigin());
 164     if ( x )
 165         *x -= pt.x;
 166     if ( y )
 167         *y -= pt.y;
 168 }
 169
 170 void wxTopLevelWindowBase::DoClientToScreen(int *x, int *y) const
 171 {
 172     // our client area origin (0, 0) may be really something like (0, 30) for
 173     // wxWindow if we have a toolbar, account for it before translating
 174     wxPoint pt(GetClientAreaOrigin());
 175     if ( x )
 176         *x += pt.x;
 177     if ( y )
 178         *y += pt.y;
 179
 180     wxWindow::DoClientToScreen(x, y);
 181 }
 182
 183
 184 // ----------------------------------------------------------------------------
 185 // event handlers
 186 // ----------------------------------------------------------------------------
 187
 188 // default resizing behaviour - if only ONE subwindow, resize to fill the
 189 // whole client area
 190 void wxTopLevelWindowBase::OnSize(wxSizeEvent& WXUNUSED(event))
 191 {
 192     // if we're using constraints or sizers - do use them
 193     if ( GetAutoLayout() )
 194     {
 195         Layout();
 196     }
 197     else
 198     {
 199         // do we have _exactly_ one child?
 200         wxWindow *child = (wxWindow *)NULL;
 201         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 202               node;
 203               node = node->GetNext() )
 204         {
 205             wxWindow *win = node->GetData();
 206
 207             // exclude top level and managed windows (status bar isn't
 208             // currently in the children list except under wxMac anyhow, but
 209             // it makes no harm to test for it)
 210             if ( !win->IsTopLevel() && !IsOneOfBars(win) )
 211             {
 212                 if ( child )
 213                 {
 214                     return;     // it's our second subwindow - nothing to do
 215                 }
 216
 217                 child = win;
 218             }
 219         }
 220
 221         // do we have any children at all?
 222         if ( child )
 223         {
 224             // exactly one child - set it's size to fill the whole frame
 225             int clientW, clientH;
 226             DoGetClientSize(&clientW, &clientH);
 227
 228             // for whatever reasons, wxGTK wants to have a small offset - it
 229             // probably looks better with it?
 230 #ifdef __WXGTK__
 231             static const int ofs = 1;
 232 #else
 233             static const int ofs = 0;
 234 #endif
 235
 236             child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);
 237         }
 238     }
 239 }
 240
 241 // The default implementation for the close window event.
 242 void wxTopLevelWindowBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 243 {
 244     Destroy();
 245 }
 246
 247 bool wxTopLevelWindowBase::SendIconizeEvent(bool iconized)
 248 {
 249     wxIconizeEvent event(GetId(), iconized);
 250     event.SetEventObject(this);
 251
 252     return GetEventHandler()->ProcessEvent(event);
 253 }
 254
 255 // do the window-specific processing after processing the update event
 256 void wxTopLevelWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
 257 {
 258     if ( event.GetSetEnabled() )
 259         Enable(event.GetEnabled());
 260
 261     if ( event.GetSetText() )
 262     {
 263         if ( event.GetText() != GetTitle() )
 264             SetTitle(event.GetText());
 265     }
 266 }
 267
 268 void wxTopLevelWindowBase::RequestUserAttention(int WXUNUSED(flags))
 269 {
 270     // it's probably better than do nothing, isn't it?
 271     Raise();
 272 }
 273