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: notice that we need screen coordinates for
 162         // positioning this TLW
 163         rectCentre = GetParent()->GetScreenRect();
 164     }
 165     else
 166     {
 167         // we were explicitely asked to centre this window on the entire screen
 168         // or if we have no parent anyhow and so can't centre on it
 169 #if wxUSE_DISPLAY
 170         const int nDisplay = wxDisplay::GetFromWindow(this);
 171         if ( nDisplay != wxNOT_FOUND )
 172         {
 173             rectCentre = wxDisplay(nDisplay).GetGeometry();
 174         }
 175         else
 176 #endif // wxUSE_DISPLAY
 177         {
 178             wxDisplaySize(&rectCentre.width, &rectCentre.height);
 179         }
 180     }
 181
 182     // window may be at -1 if it's centered on a secondary display, for example
 183     SetSize(GetRect().CentreIn(rectCentre, dir), wxSIZE_ALLOW_MINUS_ONE);
 184 }
 185
 186 // ----------------------------------------------------------------------------
 187 // wxTopLevelWindow size management: we exclude the areas taken by
 188 // menu/status/toolbars from the client area, so the client area is what's
 189 // really available for the frame contents
 190 // ----------------------------------------------------------------------------
 191
 192 void wxTopLevelWindowBase::DoScreenToClient(int *x, int *y) const
 193 {
 194     wxWindow::DoScreenToClient(x, y);
 195
 196     // translate the wxWindow client coords to our client coords
 197     wxPoint pt(GetClientAreaOrigin());
 198     if ( x )
 199         *x -= pt.x;
 200     if ( y )
 201         *y -= pt.y;
 202 }
 203
 204 void wxTopLevelWindowBase::DoClientToScreen(int *x, int *y) const
 205 {
 206     // our client area origin (0, 0) may be really something like (0, 30) for
 207     // wxWindow if we have a toolbar, account for it before translating
 208     wxPoint pt(GetClientAreaOrigin());
 209     if ( x )
 210         *x += pt.x;
 211     if ( y )
 212         *y += pt.y;
 213
 214     wxWindow::DoClientToScreen(x, y);
 215 }
 216
 217
 218 // ----------------------------------------------------------------------------
 219 // event handlers
 220 // ----------------------------------------------------------------------------
 221
 222 // default resizing behaviour - if only ONE subwindow, resize to fill the
 223 // whole client area
 224 void wxTopLevelWindowBase::DoLayout()
 225 {
 226     // if we're using constraints or sizers - do use them
 227     if ( GetAutoLayout() )
 228     {
 229         Layout();
 230     }
 231     else
 232     {
 233         // do we have _exactly_ one child?
 234         wxWindow *child = (wxWindow *)NULL;
 235         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 236               node;
 237               node = node->GetNext() )
 238         {
 239             wxWindow *win = node->GetData();
 240
 241             // exclude top level and managed windows (status bar isn't
 242             // currently in the children list except under wxMac anyhow, but
 243             // it makes no harm to test for it)
 244             if ( !win->IsTopLevel() && !IsOneOfBars(win) )
 245             {
 246                 if ( child )
 247                 {
 248                     return;     // it's our second subwindow - nothing to do
 249                 }
 250
 251                 child = win;
 252             }
 253         }
 254
 255         // do we have any children at all?
 256         if ( child )
 257         {
 258             // exactly one child - set it's size to fill the whole frame
 259             int clientW, clientH;
 260             DoGetClientSize(&clientW, &clientH);
 261
 262             // for whatever reasons, wxGTK wants to have a small offset - it
 263             // probably looks better with it?
 264 #ifdef __WXGTK__
 265             static const int ofs = 1;
 266 #else
 267             static const int ofs = 0;
 268 #endif
 269
 270             child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);
 271         }
 272     }
 273 }
 274
 275 // The default implementation for the close window event.
 276 void wxTopLevelWindowBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 277 {
 278     Destroy();
 279 }
 280
 281 bool wxTopLevelWindowBase::SendIconizeEvent(bool iconized)
 282 {
 283     wxIconizeEvent event(GetId(), iconized);
 284     event.SetEventObject(this);
 285
 286     return GetEventHandler()->ProcessEvent(event);
 287 }
 288
 289 // do the window-specific processing after processing the update event
 290 void wxTopLevelWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
 291 {
 292     // call inherited, but skip the wxControl's version, and call directly the
 293     // wxWindow's one instead, because the only reason why we are overriding this
 294     // function is that we want to use SetTitle() instead of wxControl::SetLabel()
 295     wxWindowBase::DoUpdateWindowUI(event);
 296
 297     // update title
 298     if ( event.GetSetText() )
 299     {
 300         if ( event.GetText() != GetTitle() )
 301             SetTitle(event.GetText());
 302     }
 303 }
 304
 305 void wxTopLevelWindowBase::RequestUserAttention(int WXUNUSED(flags))
 306 {
 307     // it's probably better than do nothing, isn't it?
 308     Raise();
 309 }
 310