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 wxUSE_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 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 }
  82
  83 bool wxDialog::Create(wxWindow *parent, wxWindowID id,
  84            const wxString& title,
  85            const wxPoint& pos,
  86            const wxSize& size,
  87            long style,
  88            const wxString& name)
  89 {
  90   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  91   SetName(name);
  92
  93   if (!parent)
  94     wxTopLevelWindows.Append(this);
  95
  96 //  windowFont = wxTheFontList->FindOrCreateFont(11, wxSWISS, wxNORMAL, wxNORMAL);
  97
  98   if (parent) parent->AddChild(this);
  99
 100   if ( id == -1 )
 101     m_windowId = (int)NewControlId();
 102   else
 103   m_windowId = id;
 104
 105   int x = pos.x;
 106   int y = pos.y;
 107   int width = size.x;
 108   int height = size.y;
 109
 110   if (x < 0) x = wxDIALOG_DEFAULT_X;
 111   if (y < 0) y = wxDIALOG_DEFAULT_Y;
 112
 113   m_windowStyle = style;
 114
 115   m_isShown = FALSE;
 116   m_modalShowing = FALSE;
 117
 118   if (width < 0)
 119     width = 500;
 120   if (height < 0)
 121     height = 500;
 122
 123   WXDWORD extendedStyle = MakeExtendedStyle(m_windowStyle);
 124   if (m_windowStyle & wxSTAY_ON_TOP)
 125     extendedStyle |= WS_EX_TOPMOST;
 126
 127   // Allows creation of dialogs with & without captions under MSWindows
 128   if(style & wxCAPTION){
 129     MSWCreate(m_windowId, (wxWindow *)parent, NULL, this, NULL, x, y, width, height, 0, "wxCaptionDialog",
 130     extendedStyle);
 131   }
 132   else{
 133     MSWCreate(m_windowId, (wxWindow *)parent, NULL, this, NULL, x, y, width, height, 0, "wxNoCaptionDialog",
 134     extendedStyle);
 135   }
 136
 137   SubclassWin(GetHWND());
 138
 139   SetWindowText((HWND) GetHWND(), (const char *)title);
 140   SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
 141
 142   return TRUE;
 143 }
 144
 145 void wxDialog::SetModal(bool flag)
 146 {
 147   if ( flag )
 148     m_windowStyle |= wxDIALOG_MODAL ;
 149   else
 150     if ( m_windowStyle & wxDIALOG_MODAL )
 151         m_windowStyle -= wxDIALOG_MODAL ;
 152
 153   wxModelessWindows.DeleteObject(this);
 154   if (!flag)
 155     wxModelessWindows.Append(this);
 156 }
 157
 158 wxDialog::~wxDialog()
 159 {
 160   m_isBeingDeleted = TRUE;
 161
 162   wxTopLevelWindows.DeleteObject(this);
 163
 164   if (m_modalShowing)
 165   {
 166     Show(FALSE);
 167     // For some reason, wxWindows can activate another task altogether
 168     // when a frame is destroyed after a modal dialog has been invoked.
 169     // Try to bring the parent to the top.
 170     // dfgg: I moved this following line from end of function -
 171     //       must not call if another window is on top!!
 172     //       This can often happen with Close() and delayed deleting
 173     if (GetParent() && GetParent()->GetHWND())
 174       ::BringWindowToTop((HWND) GetParent()->GetHWND());
 175   }
 176
 177   m_modalShowing = FALSE;
 178   if ( GetHWND() )
 179     ShowWindow((HWND) GetHWND(), SW_HIDE);
 180
 181   if ( (GetWindowStyleFlag() & wxDIALOG_MODAL) != wxDIALOG_MODAL )
 182     wxModelessWindows.DeleteObject(this);
 183
 184   UnsubclassWin();
 185
 186   // If this is the last top-level window, exit.
 187   if (wxTheApp && (wxTopLevelWindows.Number() == 0))
 188   {
 189     wxTheApp->SetTopWindow(NULL);
 190
 191     if (wxTheApp->GetExitOnFrameDelete())
 192     {
 193        PostQuitMessage(0);
 194     }
 195   }
 196 }
 197
 198 // By default, pressing escape cancels the dialog
 199 void wxDialog::OnCharHook(wxKeyEvent& event)
 200 {
 201   if (GetHWND())
 202   {
 203     if (event.m_keyCode == WXK_ESCAPE)
 204     {
 205     // Behaviour changed in 2.0: we'll send a Cancel message
 206     // to the dialog instead of Close.
 207     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 208     cancelEvent.SetEventObject( this );
 209     GetEventHandler()->ProcessEvent(cancelEvent);
 210
 211     return;
 212     }
 213   }
 214   // We didn't process this event.
 215   event.Skip();
 216 }
 217
 218 void wxDialog::OnPaint(wxPaintEvent& event)
 219 {
 220   // No: if you call the default procedure, it makes
 221   // the following painting code not work.
 222 //  wxWindow::OnPaint(event);
 223 }
 224
 225 void wxDialog::Fit(void)
 226 {
 227   wxWindow::Fit();
 228 }
 229
 230 void wxDialog::Iconize(bool WXUNUSED(iconize))
 231 {
 232   // Windows dialog boxes can't be iconized
 233 }
 234
 235 bool wxDialog::IsIconized(void) const
 236 {
 237   return FALSE;
 238 }
 239
 240 void wxDialog::SetClientSize(int width, int height)
 241 {
 242   HWND hWnd = (HWND) GetHWND();
 243   RECT rect;
 244   GetClientRect(hWnd, &rect);
 245
 246   RECT rect2;
 247   GetWindowRect(hWnd, &rect2);
 248
 249   // Find the difference between the entire window (title bar and all)
 250   // and the client area; add this to the new client size to move the
 251   // window
 252   int actual_width = rect2.right - rect2.left - rect.right + width;
 253   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 254
 255   MoveWindow(hWnd, rect2.left, rect2.top, actual_width, actual_height, TRUE);
 256
 257   wxSizeEvent event(wxSize(actual_width, actual_height), m_windowId);
 258   event.SetEventObject( this );
 259   GetEventHandler()->ProcessEvent(event);
 260 }
 261
 262 void wxDialog::GetPosition(int *x, int *y) const
 263 {
 264   HWND hWnd = (HWND) GetHWND();
 265   RECT rect;
 266   GetWindowRect(hWnd, &rect);
 267
 268   *x = rect.left;
 269   *y = rect.top;
 270 }
 271
 272 bool wxDialog::IsShown(void) const
 273 {
 274   return m_isShown;
 275 }
 276
 277 bool wxDialog::Show(bool show)
 278 {
 279   m_isShown = show;
 280
 281   if (show)
 282     InitDialog();
 283
 284   bool modal =  ((GetWindowStyleFlag() & wxDIALOG_MODAL) == wxDIALOG_MODAL) ;
 285
 286 #if WXGARBAGE_COLLECTION_ON /* MATTHEW: GC */
 287   if (!modal) {
 288     if (show) {
 289       if (!wxModelessWindows.Member(this))
 290   wxModelessWindows.Append(this);
 291     } else
 292       wxModelessWindows.DeleteObject(this);
 293   }
 294   if (show) {
 295     if (!wxTopLevelWindows.Member(this))
 296       wxTopLevelWindows.Append(this);
 297   } else
 298     wxTopLevelWindows.DeleteObject(this);
 299 #endif
 300
 301   if (modal)
 302   {
 303     if (show)
 304     {
 305       m_hwndOldFocus = (WXHWND)::GetFocus();
 306
 307       if (m_modalShowing)
 308       {
 309         BringWindowToTop((HWND) GetHWND());
 310         return TRUE;
 311       }
 312
 313       m_modalShowing = TRUE;
 314       wxNode *node = wxModalDialogs.First();
 315       while (node)
 316       {
 317         wxDialog *box = (wxDialog *)node->Data();
 318         if (box != this)
 319           ::EnableWindow((HWND) box->GetHWND(), FALSE);
 320         node = node->Next();
 321       }
 322
 323       // if we don't do it, some window might be deleted while we have pointers
 324       // to them in our disabledWindows list and the program will crash when it
 325       // will try to reenable them after the modal dialog end
 326       wxTheApp->DeletePendingObjects();
 327       wxList disabledWindows;
 328
 329       node = wxModelessWindows.First();
 330       while (node)
 331       {
 332         wxWindow *win = (wxWindow *)node->Data();
 333         if (::IsWindowEnabled((HWND) win->GetHWND()))
 334         {
 335           ::EnableWindow((HWND) win->GetHWND(), FALSE);
 336           disabledWindows.Append(win);
 337         }
 338         node = node->Next();
 339       }
 340
 341       ShowWindow((HWND) GetHWND(), SW_SHOW);
 342       EnableWindow((HWND) GetHWND(), TRUE);
 343       BringWindowToTop((HWND) GetHWND());
 344
 345       if (!wxModalDialogs.Member(this))
 346         wxModalDialogs.Append(this);
 347
 348       MSG msg;
 349       // Must test whether this dialog still exists: we may not process
 350       // a message before the deletion.
 351       while (wxModalDialogs.Member(this) && m_modalShowing && GetMessage(&msg, NULL, 0, 0))
 352       {
 353         if (m_acceleratorTable.Ok() &&
 354           ::TranslateAccelerator((HWND) GetHWND(), (HACCEL) m_acceleratorTable.GetHACCEL(), &msg))
 355         {
 356             // Have processed the message
 357         }
 358         else if (!IsDialogMessage((HWND) GetHWND(), &msg))
 359         {
 360           TranslateMessage(&msg);
 361           DispatchMessage(&msg);
 362         }
 363         if (m_modalShowing && !::PeekMessage(&msg, 0, 0, 0, PM_NOREMOVE))
 364         // dfgg: NB MUST test m_modalShowing again as the message loop could have triggered
 365         //       a Show(FALSE) in the mean time!!!
 366         // Without the test, we might delete the dialog before the end of modal showing.
 367         {
 368                 while (wxTheApp->ProcessIdle() && m_modalShowing)
 369                 {
 370                     // Keep going until we decide we've done enough
 371                 }
 372          }
 373       }
 374       // dfgg: now must specifically re-enable all other app windows that we disabled earlier
 375       node=disabledWindows.First();
 376       while(node) {
 377         wxWindow* win = (wxWindow*) node->Data();
 378         HWND hWnd = (HWND) win->GetHWND();
 379         if (::IsWindow(hWnd) && (wxModalDialogs.Member(win) || wxModelessWindows.Member(win) ))
 380           ::EnableWindow(hWnd,TRUE);
 381         node=node->Next();
 382       }
 383     }
 384     else // !show
 385     {
 386       ::SetFocus((HWND)m_hwndOldFocus);
 387
 388       wxModalDialogs.DeleteObject(this);
 389
 390       wxNode *last = wxModalDialogs.Last();
 391
 392       // If there's still a modal dialog active, we
 393       // enable it, else we enable all modeless windows
 394       if (last)
 395       {
 396         wxDialog *box = (wxDialog *)last->Data();
 397         HWND hwnd = (HWND) box->GetHWND();
 398         if (box->m_winEnabled)
 399           EnableWindow(hwnd, TRUE);
 400         BringWindowToTop(hwnd);
 401       }
 402       else
 403       {
 404         wxNode *node = wxModelessWindows.First();
 405         while (node)
 406         {
 407           wxWindow *win = (wxWindow *)node->Data();
 408           HWND hwnd = (HWND) win->GetHWND();
 409           // Only enable again if not user-disabled.
 410           if (win->IsUserEnabled())
 411             EnableWindow(hwnd, TRUE);
 412           node = node->Next();
 413         }
 414       }
 415       // Try to highlight the correct window (the parent)
 416       HWND hWndParent = 0;
 417       if (GetParent())
 418       {
 419         hWndParent = (HWND) GetParent()->GetHWND();
 420         if (hWndParent)
 421           ::BringWindowToTop(hWndParent);
 422       }
 423       ShowWindow((HWND) GetHWND(), SW_HIDE);
 424       m_modalShowing = FALSE;
 425     }
 426   }
 427   else // !modal
 428   {
 429     if (show)
 430     {
 431       ShowWindow((HWND) GetHWND(), SW_SHOW);
 432       BringWindowToTop((HWND) GetHWND());
 433     }
 434     else
 435     {
 436       // Try to highlight the correct window (the parent)
 437       HWND hWndParent = 0;
 438       if (GetParent())
 439       {
 440         hWndParent = (HWND) GetParent()->GetHWND();
 441         if (hWndParent)
 442           ::BringWindowToTop(hWndParent);
 443       }
 444       ShowWindow((HWND) GetHWND(), SW_HIDE);
 445     }
 446   }
 447   return TRUE;
 448 }
 449
 450 void wxDialog::SetTitle(const wxString& title)
 451 {
 452   SetWindowText((HWND) GetHWND(), (const char *)title);
 453 }
 454
 455 wxString wxDialog::GetTitle(void) const
 456 {
 457   GetWindowText((HWND) GetHWND(), wxBuffer, 1000);
 458   return wxString(wxBuffer);
 459 }
 460
 461 void wxDialog::Centre(int direction)
 462 {
 463   int x_offset,y_offset ;
 464   int display_width, display_height;
 465   int  width, height, x, y;
 466   wxWindow *parent = GetParent();
 467   if ((direction & wxCENTER_FRAME) && parent)
 468   {
 469       parent->GetPosition(&x_offset,&y_offset) ;
 470       parent->GetSize(&display_width,&display_height) ;
 471   }
 472   else
 473   {
 474     wxDisplaySize(&display_width, &display_height);
 475     x_offset = 0 ;
 476     y_offset = 0 ;
 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     else
 579         event.Veto(TRUE);
 580 }
 581
 582 // Destroy the window (delayed, if a managed window)
 583 bool wxDialog::Destroy(void)
 584 {
 585   if (!wxPendingDelete.Member(this))
 586     wxPendingDelete.Append(this);
 587   return TRUE;
 588 }
 589
 590 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& event)
 591 {
 592 #if CTL3D
 593   Ctl3dColorChange();
 594 #else
 595   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 596   Refresh();
 597 #endif
 598 }
 599
 600 long wxDialog::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 601 {
 602   return wxWindow::MSWWindowProc(message, wParam, lParam);
 603 }
 604