src/msw/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dialog.cpp
   3 // Purpose:     wxDialog class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "dialog.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/dialog.h"
  25 #include "wx/utils.h"
  26 #include "wx/frame.h"
  27 #include "wx/app.h"
  28 #include "wx/settings.h"
  29 #endif
  30
  31 #include "wx/msw/private.h"
  32
  33 #if USE_COMMON_DIALOGS
  34 #include <commdlg.h>
  35 #endif
  36
  37 #define wxDIALOG_DEFAULT_X 300
  38 #define wxDIALOG_DEFAULT_Y 300
  39
  40 // Lists to keep track of windows, so we can disable/enable them
  41 // for modal dialogs
  42 wxList wxModalDialogs;
  43 wxList wxModelessWindows;  // Frames and modeless dialogs
  44 extern wxList wxPendingDelete;
  45
  46 #if !USE_SHARED_LIBRARY
  47 IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxPanel)
  48
  49 BEGIN_EVENT_TABLE(wxDialog, wxPanel)
  50   EVT_BUTTON(wxID_OK, wxDialog::OnOK)
  51   EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
  52   EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
  53   EVT_CHAR_HOOK(wxDialog::OnCharHook)
  54   EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
  55   EVT_CLOSE(wxDialog::OnCloseWindow)
  56 END_EVENT_TABLE()
  57
  58 #endif
  59
  60 long wxDialog::MSWDefWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
  61 {
  62   return ::CallWindowProc(CASTWNDPROC (FARPROC) m_oldWndProc, (HWND) GetHWND(), (UINT) nMsg, (WPARAM) wParam, (LPARAM) lParam);
  63 }
  64
  65 bool wxDialog::MSWProcessMessage(WXMSG* pMsg)
  66 {
  67   return (::IsDialogMessage((HWND) GetHWND(), (MSG*)pMsg) != 0);
  68 }
  69
  70 bool wxDialog::MSWOnClose(void)
  71 {
  72     return Close();
  73 }
  74
  75 wxDialog::wxDialog(void)
  76 {
  77   m_isShown = FALSE;
  78   m_modalShowing = FALSE;
  79
  80   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  81   SetDefaultBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  82 }
  83
  84 bool wxDialog::Create(wxWindow *parent, wxWindowID id,
  85            const wxString& title,
  86            const wxPoint& pos,
  87            const wxSize& size,
  88            long style,
  89            const wxString& name)
  90 {
  91   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  92   SetDefaultBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  93   SetName(name);
  94
  95   if (!parent)
  96     wxTopLevelWindows.Append(this);
  97
  98 //  windowFont = wxTheFontList->FindOrCreateFont(11, wxSWISS, wxNORMAL, wxNORMAL);
  99
 100   if (parent) parent->AddChild(this);
 101
 102   if ( id == -1 )
 103         m_windowId = (int)NewControlId();
 104   else
 105         m_windowId = id;
 106
 107   int x = pos.x;
 108   int y = pos.y;
 109   int width = size.x;
 110   int height = size.y;
 111
 112   if (x < 0) x = wxDIALOG_DEFAULT_X;
 113   if (y < 0) y = wxDIALOG_DEFAULT_Y;
 114
 115   m_windowStyle = style;
 116
 117   m_isShown = FALSE;
 118   m_modalShowing = FALSE;
 119
 120   if (width < 0)
 121     width = 500;
 122   if (height < 0)
 123     height = 500;
 124
 125   WXDWORD extendedStyle = MakeExtendedStyle(m_windowStyle);
 126   if (m_windowStyle & wxSTAY_ON_TOP)
 127     extendedStyle |= WS_EX_TOPMOST;
 128
 129   // Allows creation of dialogs with & without captions under MSWindows
 130   if(style & wxCAPTION){
 131     MSWCreate(m_windowId, (wxWindow *)parent, NULL, this, NULL, x, y, width, height, 0, "wxCaptionDialog",
 132           extendedStyle);
 133   }
 134   else{
 135     MSWCreate(m_windowId, (wxWindow *)parent, NULL, this, NULL, x, y, width, height, 0, "wxNoCaptionDialog",
 136           extendedStyle);
 137   }
 138
 139   SubclassWin(GetHWND());
 140
 141   SetWindowText((HWND) GetHWND(), (const char *)title);
 142   SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
 143
 144   return TRUE;
 145 }
 146
 147 void wxDialog::SetModal(bool flag)
 148 {
 149         if ( flag )
 150                 m_windowStyle |= wxDIALOG_MODAL ;
 151         else
 152                 if ( m_windowStyle & wxDIALOG_MODAL )
 153                         m_windowStyle -= wxDIALOG_MODAL ;
 154
 155   wxModelessWindows.DeleteObject(this);
 156   if (!flag)
 157     wxModelessWindows.Append(this);
 158 }
 159
 160 wxDialog::~wxDialog()
 161 {
 162   m_isBeingDeleted = TRUE;
 163
 164   wxTopLevelWindows.DeleteObject(this);
 165
 166   if (m_modalShowing)
 167   {
 168     Show(FALSE);
 169     // For some reason, wxWindows can activate another task altogether
 170     // when a frame is destroyed after a modal dialog has been invoked.
 171     // Try to bring the parent to the top.
 172     // dfgg: I moved this following line from end of function -
 173     //       must not call if another window is on top!!
 174     //       This can often happen with Close() and delayed deleting
 175     if (GetParent() && GetParent()->GetHWND())
 176       ::BringWindowToTop((HWND) GetParent()->GetHWND());
 177   }
 178
 179   m_modalShowing = FALSE;
 180   if ( GetHWND() )
 181     ShowWindow((HWND) GetHWND(), SW_HIDE);
 182
 183   if ( (GetWindowStyleFlag() & wxDIALOG_MODAL) != wxDIALOG_MODAL )
 184     wxModelessWindows.DeleteObject(this);
 185
 186   UnsubclassWin();
 187
 188   // If this is the last top-level window, exit.
 189   if (wxTheApp && (wxTopLevelWindows.Number() == 0))
 190   {
 191     wxTheApp->SetTopWindow(NULL);
 192
 193     if (wxTheApp->GetExitOnFrameDelete())
 194     {
 195        PostQuitMessage(0);
 196     }
 197   }
 198 }
 199
 200 // By default, pressing escape cancels the dialog
 201 void wxDialog::OnCharHook(wxKeyEvent& event)
 202 {
 203   if (GetHWND())
 204   {
 205     if (event.m_keyCode == WXK_ESCAPE)
 206     {
 207                 // Behaviour changed in 2.0: we'll send a Cancel message
 208                 // to the dialog instead of Close.
 209                 wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 210                 cancelEvent.SetEventObject( this );
 211                 GetEventHandler()->ProcessEvent(cancelEvent);
 212
 213                 return;
 214     }
 215   }
 216   // We didn't process this event.
 217   event.Skip();
 218 }
 219
 220 void wxDialog::OnPaint(wxPaintEvent& event)
 221 {
 222         // No: if you call the default procedure, it makes
 223         // the following painting code not work.
 224 //      wxWindow::OnPaint(event);
 225 }
 226
 227 void wxDialog::Fit(void)
 228 {
 229   wxWindow::Fit();
 230 }
 231
 232 void wxDialog::Iconize(bool WXUNUSED(iconize))
 233 {
 234   // Windows dialog boxes can't be iconized
 235 }
 236
 237 bool wxDialog::IsIconized(void) const
 238 {
 239   return FALSE;
 240 }
 241
 242 void wxDialog::SetSize(int x, int y, int width, int height, int WXUNUSED(sizeFlags))
 243 {
 244   wxWindow::SetSize(x, y, width, height);
 245 }
 246
 247 void wxDialog::SetClientSize(int width, int height)
 248 {
 249   HWND hWnd = (HWND) GetHWND();
 250   RECT rect;
 251   GetClientRect(hWnd, &rect);
 252
 253   RECT rect2;
 254   GetWindowRect(hWnd, &rect2);
 255
 256   // Find the difference between the entire window (title bar and all)
 257   // and the client area; add this to the new client size to move the
 258   // window
 259   int actual_width = rect2.right - rect2.left - rect.right + width;
 260   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 261
 262   MoveWindow(hWnd, rect2.left, rect2.top, actual_width, actual_height, TRUE);
 263
 264   wxSizeEvent event(wxSize(actual_width, actual_height), m_windowId);
 265   event.SetEventObject( this );
 266   GetEventHandler()->ProcessEvent(event);
 267 }
 268
 269 void wxDialog::GetPosition(int *x, int *y) const
 270 {
 271   HWND hWnd = (HWND) GetHWND();
 272   RECT rect;
 273   GetWindowRect(hWnd, &rect);
 274
 275   *x = rect.left;
 276   *y = rect.top;
 277 }
 278
 279 bool wxDialog::IsShown(void) const
 280 {
 281   return m_isShown;
 282 }
 283
 284 bool wxDialog::Show(bool show)
 285 {
 286   m_isShown = show;
 287
 288   if (show)
 289     InitDialog();
 290
 291   bool modal =  ((GetWindowStyleFlag() & wxDIALOG_MODAL) == wxDIALOG_MODAL) ;
 292
 293 #if WXGARBAGE_COLLECTION_ON /* MATTHEW: GC */
 294   if (!modal) {
 295     if (show) {
 296       if (!wxModelessWindows.Member(this))
 297         wxModelessWindows.Append(this);
 298     } else
 299       wxModelessWindows.DeleteObject(this);
 300   }
 301   if (show) {
 302     if (!wxTopLevelWindows.Member(this))
 303       wxTopLevelWindows.Append(this);
 304   } else
 305     wxTopLevelWindows.DeleteObject(this);
 306 #endif
 307
 308   if (modal)
 309   {
 310     if (show)
 311     {
 312       wxList DisabledWindows;
 313       if (m_modalShowing)
 314       {
 315         BringWindowToTop((HWND) GetHWND());
 316         return TRUE;
 317       }
 318
 319       m_modalShowing = TRUE;
 320       wxNode *node = wxModalDialogs.First();
 321       while (node)
 322       {
 323         wxDialog *box = (wxDialog *)node->Data();
 324         if (box != this)
 325           ::EnableWindow((HWND) box->GetHWND(), FALSE);
 326         node = node->Next();
 327       }
 328       node = wxModelessWindows.First();
 329       while (node)
 330       {
 331         wxWindow *win = (wxWindow *)node->Data();
 332                 if (::IsWindowEnabled((HWND) win->GetHWND()))
 333                 {
 334           ::EnableWindow((HWND) win->GetHWND(), FALSE);
 335           DisabledWindows.Append(win);
 336                 }
 337         node = node->Next();
 338       }
 339
 340       ShowWindow((HWND) GetHWND(), SW_SHOW);
 341       EnableWindow((HWND) GetHWND(), TRUE);
 342       BringWindowToTop((HWND) GetHWND());
 343
 344       if (!wxModalDialogs.Member(this))
 345         wxModalDialogs.Append(this);
 346
 347       MSG msg;
 348       // Must test whether this dialog still exists: we may not process
 349       // a message before the deletion.
 350       while (wxModalDialogs.Member(this) && m_modalShowing && GetMessage(&msg, NULL, 0, 0))
 351       {
 352         if (!IsDialogMessage((HWND) GetHWND(), &msg))
 353         {
 354           TranslateMessage(&msg);
 355           DispatchMessage(&msg);
 356         }
 357         if (m_modalShowing && !::PeekMessage(&msg, 0, 0, 0, PM_NOREMOVE))
 358                                 // dfgg: NB MUST test m_modalShowing again as the message loop could have triggered
 359                                 //       a Show(FALSE) in the mean time!!!
 360                                 // Without the test, we might delete the dialog before the end of modal showing.
 361         {
 362                 while (wxTheApp->ProcessIdle() && m_modalShowing)
 363                 {
 364                     // Keep going until we decide we've done enough
 365                 }
 366          }
 367       }
 368       // dfgg: now must specifically re-enable all other app windows that we disabled earlier
 369       node=DisabledWindows.First();
 370       while(node) {
 371                 wxWindow* win = (wxWindow*) node->Data();
 372         HWND hWnd = (HWND) win->GetHWND();
 373         if (::IsWindow(hWnd) && (wxModalDialogs.Member(win) || wxModelessWindows.Member(win) ))
 374           ::EnableWindow(hWnd,TRUE);
 375         node=node->Next();
 376       }
 377     }
 378     else
 379     {
 380       wxModalDialogs.DeleteObject(this);
 381
 382       wxNode *last = wxModalDialogs.Last();
 383
 384       // If there's still a modal dialog active, we
 385       // enable it, else we enable all modeless windows
 386       if (last)
 387       {
 388         wxDialog *box = (wxDialog *)last->Data();
 389         HWND hwnd = (HWND) box->GetHWND();
 390         if (box->m_winEnabled)
 391           EnableWindow(hwnd, TRUE);
 392         BringWindowToTop(hwnd);
 393       }
 394       else
 395       {
 396         wxNode *node = wxModelessWindows.First();
 397         while (node)
 398         {
 399           wxWindow *win = (wxWindow *)node->Data();
 400           HWND hwnd = (HWND) win->GetHWND();
 401           // Only enable again if not user-disabled.
 402           if (win->IsUserEnabled())
 403             EnableWindow(hwnd, TRUE);
 404           node = node->Next();
 405         }
 406       }
 407       // Try to highlight the correct window (the parent)
 408       HWND hWndParent = 0;
 409       if (GetParent())
 410       {
 411         hWndParent = (HWND) GetParent()->GetHWND();
 412         if (hWndParent)
 413           ::BringWindowToTop(hWndParent);
 414       }
 415       ShowWindow((HWND) GetHWND(), SW_HIDE);
 416       m_modalShowing = FALSE;
 417     }
 418   }
 419   else
 420   {
 421     if (show)
 422     {
 423       ShowWindow((HWND) GetHWND(), SW_SHOW);
 424       BringWindowToTop((HWND) GetHWND());
 425     }
 426     else
 427     {
 428       // Try to highlight the correct window (the parent)
 429       HWND hWndParent = 0;
 430       if (GetParent())
 431       {
 432         hWndParent = (HWND) GetParent()->GetHWND();
 433         if (hWndParent)
 434           ::BringWindowToTop(hWndParent);
 435       }
 436       ShowWindow((HWND) GetHWND(), SW_HIDE);
 437     }
 438   }
 439   return TRUE;
 440 }
 441
 442 void wxDialog::SetTitle(const wxString& title)
 443 {
 444   SetWindowText((HWND) GetHWND(), (const char *)title);
 445 }
 446
 447 wxString wxDialog::GetTitle(void) const
 448 {
 449   GetWindowText((HWND) GetHWND(), wxBuffer, 1000);
 450   return wxString(wxBuffer);
 451 }
 452
 453 void wxDialog::Centre(int direction)
 454 {
 455   int x_offset,y_offset ;
 456   int display_width, display_height;
 457   int  width, height, x, y;
 458   wxFrame *frame ;
 459   if (direction & wxCENTER_FRAME)
 460   {
 461     frame = (wxFrame*)GetParent() ;
 462     if (frame)
 463     {
 464       frame->GetPosition(&x_offset,&y_offset) ;
 465       frame->GetSize(&display_width,&display_height) ;
 466     }
 467   }
 468   else
 469     frame = NULL ;
 470
 471   if (frame==NULL)
 472   {
 473     wxDisplaySize(&display_width, &display_height);
 474     x_offset = 0 ;
 475     y_offset = 0 ;
 476   }
 477
 478
 479   GetSize(&width, &height);
 480   GetPosition(&x, &y);
 481
 482   if (direction & wxHORIZONTAL)
 483     x = (int)((display_width - width)/2);
 484   if (direction & wxVERTICAL)
 485     y = (int)((display_height - height)/2);
 486
 487   SetSize(x+x_offset, y+y_offset, width, height);
 488 }
 489
 490 // Replacement for Show(TRUE) for modal dialogs - returns return code
 491 int wxDialog::ShowModal(void)
 492 {
 493     m_windowStyle |= wxDIALOG_MODAL;
 494         Show(TRUE);
 495         return GetReturnCode();
 496 }
 497
 498 void wxDialog::EndModal(int retCode)
 499 {
 500         SetReturnCode(retCode);
 501         Show(FALSE);
 502 }
 503
 504 // Define for each class of dialog and control
 505 WXHBRUSH wxDialog::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 506                         WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 507 {
 508 #if CTL3D
 509   HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 510   return (WXHBRUSH) hbrush;
 511 #else
 512   return 0;
 513 #endif
 514 }
 515
 516 // Standard buttons
 517 void wxDialog::OnOK(wxCommandEvent& event)
 518 {
 519         if ( Validate() && TransferDataFromWindow() )
 520         {
 521         if ( IsModal() )
 522             EndModal(wxID_OK);
 523         else
 524         {
 525                     SetReturnCode(wxID_OK);
 526                     this->Show(FALSE);
 527         }
 528         }
 529 }
 530
 531 void wxDialog::OnApply(wxCommandEvent& event)
 532 {
 533         if (Validate())
 534                 TransferDataFromWindow();
 535         // TODO probably need to disable the Apply button until things change again
 536 }
 537
 538 void wxDialog::OnCancel(wxCommandEvent& event)
 539 {
 540     if ( IsModal() )
 541         EndModal(wxID_CANCEL);
 542     else
 543     {
 544         SetReturnCode(wxID_CANCEL);
 545                 this->Show(FALSE);
 546     }
 547 }
 548
 549 bool wxDialog::OnClose(void)
 550 {
 551         // Behaviour changed in 2.0: we'll send a Cancel message by default,
 552     // which may close the dialog.
 553     // Check for looping if the Cancel event handler calls Close()
 554
 555     static wxList closing;
 556
 557     if ( closing.Member(this) )
 558         return FALSE;
 559
 560     closing.Append(this);
 561
 562         wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 563         cancelEvent.SetEventObject( this );
 564         GetEventHandler()->ProcessEvent(cancelEvent);
 565
 566     closing.DeleteObject(this);
 567
 568         return FALSE;
 569 }
 570
 571 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 572 {
 573     // Compatibility
 574     if ( GetEventHandler()->OnClose() || event.GetForce())
 575     {
 576         this->Destroy();
 577     }
 578 }
 579
 580 // Destroy the window (delayed, if a managed window)
 581 bool wxDialog::Destroy(void)
 582 {
 583   if (!wxPendingDelete.Member(this))
 584     wxPendingDelete.Append(this);
 585   return TRUE;
 586 }
 587
 588 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& event)
 589 {
 590 #if CTL3D
 591   Ctl3dColorChange();
 592 #else
 593   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 594   SetDefaultBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 595   Refresh();
 596 #endif
 597 }
 598
 599 long wxDialog::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 600 {
 601         return wxWindow::MSWWindowProc(message, wParam, lParam);
 602 }
 603