src/common/framecmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/framecmn.cpp
   3 // Purpose:     common (for all platforms) wxFrame functions
   4 // Author:      Julian Smart, Vadim Zeitlin
   5 // Created:     01/02/97
   6 // Id:          $Id$
   7 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #ifdef __GNUG__
  20     #pragma implementation "framebase.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/frame.h"
  32     #include "wx/menu.h"
  33     #include "wx/menuitem.h"
  34     #include "wx/dcclient.h"
  35 #endif // WX_PRECOMP
  36
  37 #if wxUSE_TOOLBAR
  38     #include "wx/toolbar.h"
  39 #endif
  40 #if wxUSE_STATUSBAR
  41     #include "wx/statusbr.h"
  42 #endif
  43
  44 // ----------------------------------------------------------------------------
  45 // event table
  46 // ----------------------------------------------------------------------------
  47
  48 BEGIN_EVENT_TABLE(wxFrameBase, wxWindow)
  49     EVT_IDLE(wxFrameBase::OnIdle)
  50     EVT_CLOSE(wxFrameBase::OnCloseWindow)
  51     EVT_MENU_HIGHLIGHT_ALL(wxFrameBase::OnMenuHighlight)
  52     EVT_SIZE(wxFrameBase::OnSize)
  53 END_EVENT_TABLE()
  54
  55 // ============================================================================
  56 // implementation
  57 // ============================================================================
  58
  59 // ----------------------------------------------------------------------------
  60 // construction/destruction
  61 // ----------------------------------------------------------------------------
  62
  63 wxFrameBase::wxFrameBase()
  64 {
  65 #if wxUSE_MENUS
  66     m_frameMenuBar = NULL;
  67 #endif // wxUSE_MENUS
  68
  69 #if wxUSE_TOOLBAR
  70     m_frameToolBar = NULL;
  71 #endif // wxUSE_TOOLBAR
  72
  73 #if wxUSE_STATUSBAR
  74     m_frameStatusBar = NULL;
  75 #endif // wxUSE_STATUSBAR
  76 }
  77
  78 bool wxFrameBase::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     return TRUE;
  86 }
  87
  88 wxFrame *wxFrameBase::New(wxWindow *parent,
  89                           wxWindowID id,
  90                           const wxString& title,
  91                           const wxPoint& pos,
  92                           const wxSize& size,
  93                           long style,
  94                           const wxString& name)
  95 {
  96     return new wxFrame(parent, id, title, pos, size, style, name);
  97 }
  98
  99 void wxFrameBase::DeleteAllBars()
 100 {
 101 #if wxUSE_MENUS
 102     if ( m_frameMenuBar )
 103     {
 104         delete m_frameMenuBar;
 105         m_frameMenuBar = (wxMenuBar *) NULL;
 106     }
 107 #endif // wxUSE_MENUS
 108
 109 #if wxUSE_STATUSBAR
 110     if ( m_frameStatusBar )
 111     {
 112         delete m_frameStatusBar;
 113         m_frameStatusBar = (wxStatusBar *) NULL;
 114     }
 115 #endif // wxUSE_STATUSBAR
 116
 117 #if wxUSE_TOOLBAR
 118     if ( m_frameToolBar )
 119     {
 120         delete m_frameToolBar;
 121         m_frameToolBar = (wxToolBar *) NULL;
 122     }
 123 #endif // wxUSE_TOOLBAR
 124 }
 125
 126 bool wxFrameBase::IsOneOfBars(const wxWindow *win) const
 127 {
 128 #if wxUSE_MENUS
 129     if ( win == GetMenuBar() )
 130         return TRUE;
 131 #endif // wxUSE_MENUS
 132
 133 #if wxUSE_STATUSBAR
 134     if ( win == GetStatusBar() )
 135         return TRUE;
 136 #endif // wxUSE_STATUSBAR
 137
 138 #if wxUSE_TOOLBAR
 139     if ( win == GetToolBar() )
 140         return TRUE;
 141 #endif // wxUSE_TOOLBAR
 142
 143     return FALSE;
 144 }
 145
 146 // ----------------------------------------------------------------------------
 147 // wxFrame size management: we exclude the areas taken by menu/status/toolbars
 148 // from the client area, so the client area is what's really available for the
 149 // frame contents
 150 // ----------------------------------------------------------------------------
 151
 152 // get the origin of the client area in the client coordinates
 153 wxPoint wxFrameBase::GetClientAreaOrigin() const
 154 {
 155     wxPoint pt(0, 0);
 156
 157 #if wxUSE_TOOLBAR
 158     if ( GetToolBar() && GetToolBar()->IsShown() )
 159     {
 160         int w, h;
 161         GetToolBar()->GetSize(& w, & h);
 162
 163         if ( GetToolBar()->GetWindowStyleFlag() & wxTB_VERTICAL )
 164         {
 165             pt.x += w;
 166         }
 167         else
 168         {
 169             pt.y += h;
 170         }
 171     }
 172 #endif // wxUSE_TOOLBAR
 173
 174     return pt;
 175 }
 176
 177 void wxFrameBase::DoScreenToClient(int *x, int *y) const
 178 {
 179     wxWindow::DoScreenToClient(x, y);
 180
 181     // We may be faking the client origin.
 182     // So a window that's really at (0, 30) may appear
 183     // (to wxWin apps) to be at (0, 0).
 184     wxPoint pt(GetClientAreaOrigin());
 185     *x -= pt.x;
 186     *y -= pt.y;
 187 }
 188
 189 void wxFrameBase::DoClientToScreen(int *x, int *y) const
 190 {
 191     // We may be faking the client origin.
 192     // So a window that's really at (0, 30) may appear
 193     // (to wxWin apps) to be at (0, 0).
 194     wxPoint pt1(GetClientAreaOrigin());
 195     *x += pt1.x;
 196     *y += pt1.y;
 197
 198     wxWindow::DoClientToScreen(x, y);
 199 }
 200
 201 // ----------------------------------------------------------------------------
 202 // misc
 203 // ----------------------------------------------------------------------------
 204
 205 // make the window modal (all other windows unresponsive)
 206 void wxFrameBase::MakeModal(bool modal)
 207 {
 208     if ( modal )
 209     {
 210         wxEnableTopLevelWindows(FALSE);
 211         Enable(TRUE);           // keep this window enabled
 212     }
 213     else
 214     {
 215         wxEnableTopLevelWindows(TRUE);
 216     }
 217 }
 218
 219 bool wxFrameBase::ProcessCommand(int id)
 220 {
 221 #if wxUSE_MENUS
 222     wxMenuBar *bar = GetMenuBar();
 223     if ( !bar )
 224         return FALSE;
 225
 226     wxCommandEvent commandEvent(wxEVT_COMMAND_MENU_SELECTED, id);
 227     commandEvent.SetEventObject(this);
 228
 229     wxMenuItem *item = bar->FindItem(id);
 230     if ( item && item->IsCheckable() )
 231     {
 232         item->Toggle();
 233
 234         // use the new value
 235         commandEvent.SetInt(item->IsChecked());
 236     }
 237
 238     return GetEventHandler()->ProcessEvent(commandEvent);
 239 #else // !wxUSE_MENUS
 240     return FALSE;
 241 #endif // wxUSE_MENUS/!wxUSE_MENUS
 242 }
 243
 244 // ----------------------------------------------------------------------------
 245 // event handlers
 246 // ----------------------------------------------------------------------------
 247
 248 // default resizing behaviour - if only ONE subwindow, resize to fill the
 249 // whole client area
 250 void wxFrameBase::OnSize(wxSizeEvent& WXUNUSED(event))
 251 {
 252     // if we're using constraints - do use them
 253 #if wxUSE_CONSTRAINTS
 254     if ( GetAutoLayout() )
 255     {
 256         Layout();
 257     }
 258     else
 259 #endif // wxUSE_CONSTRAINTS
 260     {
 261         // do we have _exactly_ one child?
 262         wxWindow *child = (wxWindow *)NULL;
 263         for ( wxWindowList::Node *node = GetChildren().GetFirst();
 264               node;
 265               node = node->GetNext() )
 266         {
 267             wxWindow *win = node->GetData();
 268
 269             // exclude top level and managed windows (status bar isn't
 270             // currently in the children list except under wxMac anyhow, but
 271             // it makes no harm to test for it)
 272             if ( !win->IsTopLevel() && !IsOneOfBars(win) )
 273             {
 274                 if ( child )
 275                 {
 276                     return;     // it's our second subwindow - nothing to do
 277                 }
 278
 279                 child = win;
 280             }
 281         }
 282
 283         // do we have any children at all?
 284         if ( child )
 285         {
 286             // exactly one child - set it's size to fill the whole frame
 287             int clientW, clientH;
 288             DoGetClientSize(&clientW, &clientH);
 289
 290             // for whatever reasons, wxGTK wants to have a small offset - it
 291             // probably looks better with it?
 292 #ifdef __WXGTK__
 293             static const int ofs = 1;
 294 #else
 295             static const int ofs = 0;
 296 #endif
 297
 298             child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);
 299         }
 300     }
 301 }
 302
 303 // The default implementation for the close window event.
 304 void wxFrameBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 305 {
 306     Destroy();
 307 }
 308
 309 void wxFrameBase::OnMenuHighlight(wxMenuEvent& event)
 310 {
 311 #if wxUSE_STATUSBAR
 312     (void)ShowMenuHelp(GetStatusBar(), event.GetMenuId());
 313 #endif // wxUSE_STATUSBAR
 314 }
 315
 316 bool wxFrameBase::SendIconizeEvent(bool iconized)
 317 {
 318     wxIconizeEvent event(GetId(), iconized);
 319     event.SetEventObject(this);
 320
 321     return GetEventHandler()->ProcessEvent(event);
 322 }
 323
 324 // ----------------------------------------------------------------------------
 325 // status bar stuff
 326 // ----------------------------------------------------------------------------
 327
 328 #if wxUSE_STATUSBAR
 329
 330 wxStatusBar* wxFrameBase::CreateStatusBar(int number,
 331                                           long style,
 332                                           wxWindowID id,
 333                                           const wxString& name)
 334 {
 335     // the main status bar can only be created once (or else it should be
 336     // deleted before calling CreateStatusBar() again)
 337     wxCHECK_MSG( !m_frameStatusBar, (wxStatusBar *)NULL,
 338                  wxT("recreating status bar in wxFrame") );
 339
 340     m_frameStatusBar = OnCreateStatusBar( number, style, id, name );
 341     if ( m_frameStatusBar )
 342         PositionStatusBar();
 343
 344     return m_frameStatusBar;
 345 }
 346
 347 wxStatusBar *wxFrameBase::OnCreateStatusBar(int number,
 348                                             long style,
 349                                             wxWindowID id,
 350                                             const wxString& name)
 351 {
 352     wxStatusBar *statusBar = new wxStatusBar(this, id, style, name);
 353
 354     // Set the height according to the font and the border size
 355     wxClientDC dc(statusBar);
 356     dc.SetFont(statusBar->GetFont());
 357
 358     wxCoord y;
 359     dc.GetTextExtent( "X", NULL, &y );
 360
 361     int height = (int)( (11*y)/10 + 2*statusBar->GetBorderY());
 362
 363     statusBar->SetSize( -1, -1, -1, height );
 364
 365     statusBar->SetFieldsCount(number);
 366
 367     return statusBar;
 368 }
 369
 370 void wxFrameBase::SetStatusText(const wxString& text, int number)
 371 {
 372     wxCHECK_RET( m_frameStatusBar != NULL, wxT("no statusbar to set text for") );
 373
 374     m_frameStatusBar->SetStatusText(text, number);
 375 }
 376
 377 void wxFrameBase::SetStatusWidths(int n, const int widths_field[] )
 378 {
 379     wxCHECK_RET( m_frameStatusBar != NULL, wxT("no statusbar to set widths for") );
 380
 381     m_frameStatusBar->SetStatusWidths(n, widths_field);
 382
 383     PositionStatusBar();
 384 }
 385
 386 bool wxFrameBase::ShowMenuHelp(wxStatusBar *statbar, int menuId)
 387 {
 388     if ( !statbar )
 389         return FALSE;
 390
 391     // if no help string found, we will clear the status bar text
 392     wxString helpString;
 393
 394     if ( menuId != wxID_SEPARATOR && menuId != -2 /* wxID_TITLE */ )
 395     {
 396         wxMenuBar *menuBar = GetMenuBar();
 397         if ( menuBar )
 398         {
 399             // it's ok if we don't find the item because it might belong
 400             // to the popup menu
 401             wxMenuItem *item = menuBar->FindItem(menuId);
 402             if ( item )
 403                 helpString = item->GetHelp();
 404         }
 405     }
 406
 407     // set status text even if the string is empty - this will at least
 408     // remove the string from the item which was previously selected
 409     statbar->SetStatusText(helpString);
 410
 411     return !helpString.IsEmpty();
 412 }
 413
 414 #endif // wxUSE_STATUSBAR
 415
 416 // ----------------------------------------------------------------------------
 417 // toolbar stuff
 418 // ----------------------------------------------------------------------------
 419
 420 #if wxUSE_TOOLBAR
 421
 422 wxToolBar* wxFrameBase::CreateToolBar(long style,
 423                                       wxWindowID id,
 424                                       const wxString& name)
 425 {
 426     // the main toolbar can't be recreated (unless it was explicitly deeleted
 427     // before)
 428     wxCHECK_MSG( !m_frameToolBar, (wxToolBar *)NULL,
 429                  wxT("recreating toolbar in wxFrame") );
 430
 431     m_frameToolBar = OnCreateToolBar(style, id, name);
 432
 433     return m_frameToolBar;
 434 }
 435
 436 wxToolBar* wxFrameBase::OnCreateToolBar(long style,
 437                                         wxWindowID id,
 438                                         const wxString& name)
 439 {
 440     return new wxToolBar(this, id,
 441                          wxDefaultPosition, wxDefaultSize,
 442                          style, name);
 443 }
 444
 445 #endif // wxUSE_TOOLBAR
 446
 447 // ----------------------------------------------------------------------------
 448 // Menu UI updating
 449 // ----------------------------------------------------------------------------
 450
 451 void wxFrameBase::OnIdle(wxIdleEvent& WXUNUSED(event) )
 452 {
 453 #if wxUSE_MENUS
 454     DoMenuUpdates();
 455 #endif // wxUSE_MENUS
 456 }
 457
 458 #if wxUSE_MENUS
 459
 460 // update all menus
 461 void wxFrameBase::DoMenuUpdates()
 462 {
 463     wxMenuBar* bar = GetMenuBar();
 464
 465 #ifdef __WXMSW__
 466     wxWindow* focusWin = wxFindFocusDescendant((wxWindow*) this);
 467 #else
 468     wxWindow* focusWin = (wxWindow*) NULL;
 469 #endif
 470     if ( bar != NULL )
 471     {
 472         int nCount = bar->GetMenuCount();
 473         for (int n = 0; n < nCount; n++)
 474             DoMenuUpdates(bar->GetMenu(n), focusWin);
 475     }
 476 }
 477
 478 // update a menu and all submenus recursively
 479 void wxFrameBase::DoMenuUpdates(wxMenu* menu, wxWindow* focusWin)
 480 {
 481     wxEvtHandler* evtHandler = focusWin ? focusWin->GetEventHandler() : GetEventHandler();
 482     wxMenuItemList::Node* node = menu->GetMenuItems().GetFirst();
 483     while (node)
 484     {
 485         wxMenuItem* item = node->GetData();
 486         if ( !item->IsSeparator() )
 487         {
 488             wxWindowID id = item->GetId();
 489             wxUpdateUIEvent event(id);
 490             event.SetEventObject( this );
 491
 492             if (evtHandler->ProcessEvent(event))
 493             {
 494                 if (event.GetSetText())
 495                     menu->SetLabel(id, event.GetText());
 496                 if (event.GetSetChecked())
 497                     menu->Check(id, event.GetChecked());
 498                 if (event.GetSetEnabled())
 499                     menu->Enable(id, event.GetEnabled());
 500             }
 501
 502             if (item->GetSubMenu())
 503                 DoMenuUpdates(item->GetSubMenu(), (wxWindow*) NULL);
 504         }
 505         node = node->GetNext();
 506     }
 507 }
 508
 509 #endif // wxUSE_MENUS