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 #include "wx/frame.h"
  31 #include "wx/menu.h"
  32 #include "wx/menuitem.h"
  33 #include "wx/dcclient.h"
  34
  35 #if wxUSE_TOOLBAR
  36     #include "wx/toolbar.h"
  37 #endif
  38 #if wxUSE_STATUSBAR
  39     #include "wx/statusbr.h"
  40 #endif
  41
  42 // ----------------------------------------------------------------------------
  43 // event table
  44 // ----------------------------------------------------------------------------
  45
  46 BEGIN_EVENT_TABLE(wxFrameBase, wxWindow)
  47     EVT_IDLE(wxFrameBase::OnIdle)
  48     EVT_CLOSE(wxFrameBase::OnCloseWindow)
  49     EVT_MENU_HIGHLIGHT_ALL(wxFrameBase::OnMenuHighlight)
  50     EVT_SIZE(wxFrameBase::OnSize)
  51 END_EVENT_TABLE()
  52
  53 // ============================================================================
  54 // implementation
  55 // ============================================================================
  56
  57 // ----------------------------------------------------------------------------
  58 // construction/destruction
  59 // ----------------------------------------------------------------------------
  60
  61 wxFrameBase::wxFrameBase()
  62 {
  63     m_frameMenuBar = NULL;
  64
  65 #if wxUSE_TOOLBAR
  66     m_frameToolBar = NULL;
  67 #endif // wxUSE_TOOLBAR
  68
  69 #if wxUSE_STATUSBAR
  70     m_frameStatusBar = NULL;
  71 #endif // wxUSE_STATUSBAR
  72 }
  73
  74 bool wxFrameBase::Destroy()
  75 {
  76     // delayed destruction: the frame will be deleted during the next idle
  77     // loop iteration
  78     if ( !wxPendingDelete.Member(this) )
  79         wxPendingDelete.Append(this);
  80
  81     return TRUE;
  82 }
  83
  84 wxFrame *wxFrameBase::New(wxWindow *parent,
  85                           wxWindowID id,
  86                           const wxString& title,
  87                           const wxPoint& pos,
  88                           const wxSize& size,
  89                           long style,
  90                           const wxString& name)
  91 {
  92     return new wxFrame(parent, id, title, pos, size, style, name);
  93 }
  94
  95 void wxFrameBase::DeleteAllBars()
  96 {
  97     if ( m_frameMenuBar )
  98     {
  99         delete m_frameMenuBar;
 100         m_frameMenuBar = (wxMenuBar *) NULL;
 101     }
 102
 103 #if wxUSE_STATUSBAR
 104     if ( m_frameStatusBar )
 105     {
 106         delete m_frameStatusBar;
 107         m_frameStatusBar = (wxStatusBar *) NULL;
 108     }
 109 #endif // wxUSE_STATUSBAR
 110
 111 #if wxUSE_TOOLBAR
 112     if ( m_frameToolBar )
 113     {
 114         delete m_frameToolBar;
 115         m_frameToolBar = (wxToolBar *) NULL;
 116     }
 117 #endif // wxUSE_TOOLBAR
 118 }
 119
 120 // ----------------------------------------------------------------------------
 121 // wxFrame size management: we exclude the areas taken by menu/status/toolbars
 122 // from the client area, so the client area is what's really available for the
 123 // frame contents
 124 // ----------------------------------------------------------------------------
 125
 126 // get the origin of the client area in the client coordinates
 127 wxPoint wxFrameBase::GetClientAreaOrigin() const
 128 {
 129     wxPoint pt(0, 0);
 130
 131 #if wxUSE_TOOLBAR
 132     if ( GetToolBar() && GetToolBar()->IsShown() )
 133     {
 134         int w, h;
 135         GetToolBar()->GetSize(& w, & h);
 136
 137         if ( GetToolBar()->GetWindowStyleFlag() & wxTB_VERTICAL )
 138         {
 139             pt.x += w;
 140         }
 141         else
 142         {
 143             pt.y += h;
 144         }
 145     }
 146 #endif // wxUSE_TOOLBAR
 147
 148     return pt;
 149 }
 150
 151 void wxFrameBase::DoScreenToClient(int *x, int *y) const
 152 {
 153     wxWindow::DoScreenToClient(x, y);
 154
 155     // We may be faking the client origin.
 156     // So a window that's really at (0, 30) may appear
 157     // (to wxWin apps) to be at (0, 0).
 158     wxPoint pt(GetClientAreaOrigin());
 159     *x -= pt.x;
 160     *y -= pt.y;
 161 }
 162
 163 void wxFrameBase::DoClientToScreen(int *x, int *y) const
 164 {
 165     // We may be faking the client origin.
 166     // So a window that's really at (0, 30) may appear
 167     // (to wxWin apps) to be at (0, 0).
 168     wxPoint pt1(GetClientAreaOrigin());
 169     *x += pt1.x;
 170     *y += pt1.y;
 171
 172     wxWindow::DoClientToScreen(x, y);
 173 }
 174
 175 // ----------------------------------------------------------------------------
 176 // misc
 177 // ----------------------------------------------------------------------------
 178
 179 // make the window modal (all other windows unresponsive)
 180 void wxFrameBase::MakeModal(bool modal)
 181 {
 182     if ( modal )
 183     {
 184         wxEnableTopLevelWindows(FALSE);
 185         Enable(TRUE);           // keep this window enabled
 186     }
 187     else
 188     {
 189         wxEnableTopLevelWindows(TRUE);
 190     }
 191 }
 192
 193 bool wxFrameBase::ProcessCommand(int id)
 194 {
 195     wxMenuBar *bar = GetMenuBar();
 196     if ( !bar )
 197         return FALSE;
 198
 199     wxCommandEvent commandEvent(wxEVT_COMMAND_MENU_SELECTED, id);
 200     commandEvent.SetEventObject(this);
 201
 202     wxMenuItem *item = bar->FindItem(id);
 203     if ( item && item->IsCheckable() )
 204     {
 205         item->Toggle();
 206
 207         // use the new value
 208         commandEvent.SetInt(item->IsChecked());
 209     }
 210
 211     return GetEventHandler()->ProcessEvent(commandEvent);
 212 }
 213
 214 // ----------------------------------------------------------------------------
 215 // event handlers
 216 // ----------------------------------------------------------------------------
 217
 218 // default resizing behaviour - if only ONE subwindow, resize to fill the
 219 // whole client area
 220 void wxFrameBase::OnSize(wxSizeEvent& WXUNUSED(event))
 221 {
 222     // if we're using constraints - do use them
 223 #if wxUSE_CONSTRAINTS
 224     if ( GetAutoLayout() )
 225     {
 226         Layout();
 227     }
 228     else
 229 #endif
 230     {
 231         // do we have _exactly_ one child?
 232         wxWindow *child = (wxWindow *)NULL;
 233         for ( wxWindowList::Node *node = GetChildren().GetFirst();
 234               node;
 235               node = node->GetNext() )
 236         {
 237             wxWindow *win = node->GetData();
 238
 239             // exclude top level and managed windows (status bar isn't
 240             // currently in the children list except under wxMac anyhow, but
 241             // it makes no harm to test for it)
 242             if ( !win->IsTopLevel()
 243 #if wxUSE_STATUSBAR
 244                     && (win != GetStatusBar())
 245 #endif // wxUSE_STATUSBAR
 246 #if wxUSE_TOOLBAR
 247                     && (win != GetToolBar())
 248 #endif // wxUSE_TOOLBAR
 249                )
 250             {
 251                 if ( child )
 252                 {
 253                     return;     // it's our second subwindow - nothing to do
 254                 }
 255
 256                 child = win;
 257             }
 258         }
 259
 260         // do we have any children at all?
 261         if ( child )
 262         {
 263             // exactly one child - set it's size to fill the whole frame
 264             int clientW, clientH;
 265             DoGetClientSize(&clientW, &clientH);
 266
 267             // for whatever reasons, wxGTK wants to have a small offset - it
 268             // probably looks better with it?
 269 #ifdef __WXGTK__
 270             static const int ofs = 1;
 271 #else
 272             static const int ofs = 0;
 273 #endif
 274
 275             child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);
 276         }
 277     }
 278 }
 279
 280 // The default implementation for the close window event.
 281 void wxFrameBase::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 282 {
 283     Destroy();
 284 }
 285
 286 void wxFrameBase::OnMenuHighlight(wxMenuEvent& event)
 287 {
 288 #if wxUSE_STATUSBAR
 289     (void)ShowMenuHelp(GetStatusBar(), event.GetMenuId());
 290 #endif // wxUSE_STATUSBAR
 291 }
 292
 293 // ----------------------------------------------------------------------------
 294 // status bar stuff
 295 // ----------------------------------------------------------------------------
 296
 297 #if wxUSE_STATUSBAR
 298
 299 wxStatusBar* wxFrameBase::CreateStatusBar(int number,
 300                                           long style,
 301                                           wxWindowID id,
 302                                           const wxString& name)
 303 {
 304     // the main status bar can only be created once (or else it should be
 305     // deleted before calling CreateStatusBar() again)
 306     wxCHECK_MSG( !m_frameStatusBar, (wxStatusBar *)NULL,
 307                  wxT("recreating status bar in wxFrame") );
 308
 309     m_frameStatusBar = OnCreateStatusBar( number, style, id, name );
 310     if ( m_frameStatusBar )
 311         PositionStatusBar();
 312
 313     return m_frameStatusBar;
 314 }
 315
 316 wxStatusBar *wxFrameBase::OnCreateStatusBar(int number,
 317                                             long style,
 318                                             wxWindowID id,
 319                                             const wxString& name)
 320 {
 321     wxStatusBar *statusBar = new wxStatusBar(this, id, style, name);
 322
 323     // Set the height according to the font and the border size
 324     wxClientDC dc(statusBar);
 325     dc.SetFont(statusBar->GetFont());
 326
 327     wxCoord y;
 328     dc.GetTextExtent( "X", NULL, &y );
 329
 330     int height = (int)( (11*y)/10 + 2*statusBar->GetBorderY());
 331
 332     statusBar->SetSize( -1, -1, -1, height );
 333
 334     statusBar->SetFieldsCount(number);
 335
 336     return statusBar;
 337 }
 338
 339 void wxFrameBase::SetStatusText(const wxString& text, int number)
 340 {
 341     wxCHECK_RET( m_frameStatusBar != NULL, wxT("no statusbar to set text for") );
 342
 343     m_frameStatusBar->SetStatusText(text, number);
 344 }
 345
 346 void wxFrameBase::SetStatusWidths(int n, const int widths_field[] )
 347 {
 348     wxCHECK_RET( m_frameStatusBar != NULL, wxT("no statusbar to set widths for") );
 349
 350     m_frameStatusBar->SetStatusWidths(n, widths_field);
 351
 352     PositionStatusBar();
 353 }
 354
 355 bool wxFrameBase::ShowMenuHelp(wxStatusBar *statbar, int menuId)
 356 {
 357     if ( !statbar )
 358         return FALSE;
 359
 360     // if no help string found, we will clear the status bar text
 361     wxString helpString;
 362
 363     if ( menuId != wxID_SEPARATOR && menuId != -2 /* wxID_TITLE */ )
 364     {
 365         wxMenuBar *menuBar = GetMenuBar();
 366         if ( menuBar )
 367         {
 368             // it's ok if we don't find the item because it might belong
 369             // to the popup menu
 370             wxMenuItem *item = menuBar->FindItem(menuId);
 371             if ( item )
 372                 helpString = item->GetHelp();
 373         }
 374     }
 375
 376     // set status text even if the string is empty - this will at least
 377     // remove the string from the item which was previously selected
 378     statbar->SetStatusText(helpString);
 379
 380     return !helpString.IsEmpty();
 381 }
 382
 383 #endif // wxUSE_STATUSBAR
 384
 385 // ----------------------------------------------------------------------------
 386 // toolbar stuff
 387 // ----------------------------------------------------------------------------
 388
 389 #if wxUSE_TOOLBAR
 390
 391 wxToolBar* wxFrameBase::CreateToolBar(long style,
 392                                       wxWindowID id,
 393                                       const wxString& name)
 394 {
 395     // the main toolbar can't be recreated (unless it was explicitly deeleted
 396     // before)
 397     wxCHECK_MSG( !m_frameToolBar, (wxToolBar *)NULL,
 398                  wxT("recreating toolbar in wxFrame") );
 399
 400     m_frameToolBar = OnCreateToolBar(style, id, name);
 401
 402     return m_frameToolBar;
 403 }
 404
 405 wxToolBar* wxFrameBase::OnCreateToolBar(long style,
 406                                         wxWindowID id,
 407                                         const wxString& name)
 408 {
 409     return new wxToolBar(this, id,
 410                          wxDefaultPosition, wxDefaultSize,
 411                          style, name);
 412 }
 413
 414 #endif // wxUSE_TOOLBAR
 415
 416 // ----------------------------------------------------------------------------
 417 // Menu UI updating
 418 // ----------------------------------------------------------------------------
 419
 420 void wxFrameBase::OnIdle(wxIdleEvent& WXUNUSED(event) )
 421 {
 422     DoMenuUpdates();
 423 }
 424
 425 // update all menus
 426 void wxFrameBase::DoMenuUpdates()
 427 {
 428     wxMenuBar* bar = GetMenuBar();
 429
 430 #ifdef __WXMSW__
 431     wxWindow* focusWin = wxFindFocusDescendant((wxWindow*) this);
 432 #else
 433     wxWindow* focusWin = (wxWindow*) NULL;
 434 #endif
 435     if ( bar != NULL )
 436     {
 437         int nCount = bar->GetMenuCount();
 438         for (int n = 0; n < nCount; n++)
 439             DoMenuUpdates(bar->GetMenu(n), focusWin);
 440     }
 441 }
 442
 443 // update a menu and all submenus recursively
 444 void wxFrameBase::DoMenuUpdates(wxMenu* menu, wxWindow* focusWin)
 445 {
 446     wxEvtHandler* evtHandler = focusWin ? focusWin->GetEventHandler() : GetEventHandler();
 447     wxMenuItemList::Node* node = menu->GetMenuItems().GetFirst();
 448     while (node)
 449     {
 450         wxMenuItem* item = node->GetData();
 451         if ( !item->IsSeparator() )
 452         {
 453             wxWindowID id = item->GetId();
 454             wxUpdateUIEvent event(id);
 455             event.SetEventObject( this );
 456
 457             if (evtHandler->ProcessEvent(event))
 458             {
 459                 if (event.GetSetText())
 460                     menu->SetLabel(id, event.GetText());
 461                 if (event.GetSetChecked())
 462                     menu->Check(id, event.GetChecked());
 463                 if (event.GetSetEnabled())
 464                     menu->Enable(id, event.GetEnabled());
 465             }
 466
 467             if (item->GetSubMenu())
 468                 DoMenuUpdates(item->GetSubMenu(), (wxWindow*) NULL);
 469         }
 470         node = node->GetNext();
 471     }
 472 }