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 // For compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #ifndef WX_PRECOMP
  27     #include "wx/toplevel.h"
  28     #include "wx/dcclient.h"
  29     #include "wx/app.h"
  30 #endif // WX_PRECOMP
  31
  32 #include "wx/display.h"
  33
  34 // ----------------------------------------------------------------------------
  35 // event table
  36 // ----------------------------------------------------------------------------
  37
  38 BEGIN_EVENT_TABLE(wxTopLevelWindowBase, wxWindow)
  39     EVT_CLOSE(wxTopLevelWindowBase::OnCloseWindow)
  40     EVT_SIZE(wxTopLevelWindowBase::OnSize)
  41 END_EVENT_TABLE()
  42
  43 // ============================================================================
  44 // implementation
  45 // ============================================================================
  46
  47 IMPLEMENT_ABSTRACT_CLASS(wxTopLevelWindow, wxWindow)
  48
  49 // ----------------------------------------------------------------------------
  50 // construction/destruction
  51 // ----------------------------------------------------------------------------
  52
  53 wxTopLevelWindowBase::wxTopLevelWindowBase()
  54 {
  55     // Unlike windows, top level windows are created hidden by default.
  56     m_isShown = false;
  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 void wxTopLevelWindowBase::GetRectForTopLevelChildren(int *x, int *y, int *w, int *h)
 111 {
 112     GetPosition(x,y);
 113     GetSize(w,h);
 114 }
 115
 116 wxSize wxTopLevelWindowBase::GetMaxSize() const
 117 {
 118     wxSize  size( GetMaxWidth(), GetMaxHeight() );
 119     int     w, h;
 120
 121     wxClientDisplayRect( 0, 0, &w, &h );
 122
 123     if( size.GetWidth() == wxDefaultCoord )
 124         size.SetWidth( w );
 125
 126     if( size.GetHeight() == wxDefaultCoord )
 127         size.SetHeight( h );
 128
 129     return size;
 130 }
 131
 132 /* static */
 133 wxSize wxTopLevelWindowBase::GetDefaultSize()
 134 {
 135     wxSize size = wxGetClientDisplayRect().GetSize();
 136
 137     // create proportionally bigger windows on small screens
 138     if ( size.x >= 1024 )
 139         size.x = 400;
 140     else if ( size.x >= 800 )
 141         size.x = 300;
 142     else if ( size.x >= 320 )
 143         size.x = 240;
 144
 145     if ( size.y >= 768 )
 146         size.y = 250;
 147     else if ( size.y > 200 )
 148     {
 149         size.y *= 2;
 150         size.y /= 3;
 151     }
 152
 153     return size;
 154 }
 155
 156 void wxTopLevelWindowBase::DoCentre(int dir)
 157 {
 158     wxRect rectCentre;
 159     if ( !(dir & wxCENTRE_ON_SCREEN) && GetParent() )
 160     {
 161         // centre on parent window
 162         rectCentre = GetParent()->GetRect();
 163     }
 164     else
 165     {
 166         // we were explicitely asked to centre this window on the entire screen
 167         // or if we have no parent anyhow and so can't centre on it
 168 #if wxUSE_DISPLAY
 169         const int nDisplay = wxDisplay::GetFromWindow(this);
 170         if ( nDisplay != wxNOT_FOUND )
 171         {
 172             rectCentre = wxDisplay(nDisplay).GetGeometry();
 173         }
 174         else
 175 #endif // wxUSE_DISPLAY
 176         {
 177             wxDisplaySize(&rectCentre.width, &rectCentre.height);
 178         }
 179     }
 180
 181     // window may be at -1 if it's centered on a secondary display, for example
 182     SetSize(GetRect().CentreIn(rectCentre, dir), wxSIZE_ALLOW_MINUS_ONE);
 183 }
 184
 185 // ----------------------------------------------------------------------------
 186 // wxTopLevelWindow size management: we exclude the areas taken by
 187 // menu/status/toolbars from the client area, so the client area is what's
 188 // really available for the frame contents
 189 // ----------------------------------------------------------------------------
 190
 191 void wxTopLevelWindowBase::DoScreenToClient(int *x, int *y) const
 192 {
 193     wxWindow::DoScreenToClient(x, y);
 194
 195     // translate the wxWindow client coords to our client coords
 196     wxPoint pt(GetClientAreaOrigin());
 197     if ( x )
 198         *x -= pt.x;
 199     if ( y )
 200         *y -= pt.y;
 201 }
 202
 203 void wxTopLevelWindowBase::DoClientToScreen(int *x, int *y) const
 204 {
 205     // our client area origin (0, 0) may be really something like (0, 30) for
 206     // wxWindow if we have a toolbar, account for it before translating
 207     wxPoint pt(GetClientAreaOrigin());
 208     if ( x )
 209         *x += pt.x;
 210     if ( y )
 211         *y += pt.y;
 212
 213     wxWindow::DoClientToScreen(x, y);
 214 }
 215
 216
 217 // ----------------------------------------------------------------------------
 218 // event handlers
 219 // ----------------------------------------------------------------------------
 220
 221 // default resizing behaviour - if only ONE subwindow, resize to fill the
 222 // whole client area
 223 void wxTopLevelWindowBase::DoLayout()
 224 {
 225     // if we're using constraints or sizers - do use them
 226     if ( GetAutoLayout() )
 227     {
 228         Layout();
 229     }
 230     else
 231     {
 232         // do we have _exactly_ one child?
 233         wxWindow *child = (wxWindow *)NULL;
 234         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 235               node;
 236               node = node->GetNext() )
 237         {
 238             wxWindow *win = node->GetData();
 239
 240             // exclude top level and managed windows (status bar isn't
 241             // currently in the children list except under wxMac anyhow, but
 242             // it makes no harm to test for it)
 243             if ( !win->IsTopLevel() && !IsOneOfBars(win) )
 244             {
 245                 if ( child )
 246                 {
 247                     return;     // it's our second subwindow - nothing to do
 248                 }
 249
 250                 child = win;
 251             }
 252         }
 253
 254         // do we have any children at all?
 255         if ( child )
 256         {
 257             // exactly one child - set it's size to fill the whole frame
 258             int clientW, clientH;
 259             DoGetClientSize(&clientW, &clientH);
 260
 261             // for whatever reasons, wxGTK wants to have a small offset - it
 262             // probably looks better with it?
 263 #ifdef __WXGTK__
 264             static const int ofs = 1;
 265 #else
 266             static const int ofs = 0;
 267 #endif
 268
 269             child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);
 270         }
 271     }
 272 }
 273
 274 // The default implementation for the close window event.
 275 void wxTopLevelWindowBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 276 {
 277     Destroy();
 278 }
 279
 280 bool wxTopLevelWindowBase::SendIconizeEvent(bool iconized)
 281 {
 282     wxIconizeEvent event(GetId(), iconized);
 283     event.SetEventObject(this);
 284
 285     return GetEventHandler()->ProcessEvent(event);
 286 }
 287
 288 // do the window-specific processing after processing the update event
 289 void wxTopLevelWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
 290 {
 291     // call inherited, but skip the wxControl's version, and call directly the
 292     // wxWindow's one instead, because the only reason why we are overriding this
 293     // function is that we want to use SetTitle() instead of wxControl::SetLabel()
 294     wxWindowBase::DoUpdateWindowUI(event);
 295
 296     // update title
 297     if ( event.GetSetText() )
 298     {
 299         if ( event.GetText() != GetTitle() )
 300             SetTitle(event.GetText());
 301     }
 302 }
 303
 304 void wxTopLevelWindowBase::RequestUserAttention(int WXUNUSED(flags))
 305 {
 306     // it's probably better than do nothing, isn't it?
 307     Raise();
 308 }
 309