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 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       m_hwndOldFocus = (WXHWND)::GetFocus();
 313
 314       wxList DisabledWindows;
 315       if (m_modalShowing)
 316       {
 317         BringWindowToTop((HWND) GetHWND());
 318         return TRUE;
 319       }
 320
 321       m_modalShowing = TRUE;
 322       wxNode *node = wxModalDialogs.First();
 323       while (node)
 324       {
 325         wxDialog *box = (wxDialog *)node->Data();
 326         if (box != this)
 327           ::EnableWindow((HWND) box->GetHWND(), FALSE);
 328         node = node->Next();
 329       }
 330       node = wxModelessWindows.First();
 331       while (node)
 332       {
 333         wxWindow *win = (wxWindow *)node->Data();
 334         if (::IsWindowEnabled((HWND) win->GetHWND()))
 335         {
 336           ::EnableWindow((HWND) win->GetHWND(), FALSE);
 337           DisabledWindows.Append(win);
 338         }
 339         node = node->Next();
 340       }
 341
 342       ShowWindow((HWND) GetHWND(), SW_SHOW);
 343       EnableWindow((HWND) GetHWND(), TRUE);
 344       BringWindowToTop((HWND) GetHWND());
 345
 346       if (!wxModalDialogs.Member(this))
 347         wxModalDialogs.Append(this);
 348
 349       MSG msg;
 350       // Must test whether this dialog still exists: we may not process
 351       // a message before the deletion.
 352       while (wxModalDialogs.Member(this) && m_modalShowing && GetMessage(&msg, NULL, 0, 0))
 353       {
 354         if (m_acceleratorTable.Ok() &&
 355           ::TranslateAccelerator((HWND) GetHWND(), (HACCEL) m_acceleratorTable.GetHACCEL(), &msg))
 356         {
 357             // Have processed the message
 358         }
 359         else if (!IsDialogMessage((HWND) GetHWND(), &msg))
 360         {
 361           TranslateMessage(&msg);
 362           DispatchMessage(&msg);
 363         }
 364         if (m_modalShowing && !::PeekMessage(&msg, 0, 0, 0, PM_NOREMOVE))
 365         // dfgg: NB MUST test m_modalShowing again as the message loop could have triggered
 366         //       a Show(FALSE) in the mean time!!!
 367         // Without the test, we might delete the dialog before the end of modal showing.
 368         {
 369                 while (wxTheApp->ProcessIdle() && m_modalShowing)
 370                 {
 371                     // Keep going until we decide we've done enough
 372                 }
 373          }
 374       }
 375       // dfgg: now must specifically re-enable all other app windows that we disabled earlier
 376       node=DisabledWindows.First();
 377       while(node) {
 378         wxWindow* win = (wxWindow*) node->Data();
 379         HWND hWnd = (HWND) win->GetHWND();
 380         if (::IsWindow(hWnd) && (wxModalDialogs.Member(win) || wxModelessWindows.Member(win) ))
 381           ::EnableWindow(hWnd,TRUE);
 382         node=node->Next();
 383       }
 384     }
 385     else // !show
 386     {
 387       ::SetFocus((HWND)m_hwndOldFocus);
 388
 389       wxModalDialogs.DeleteObject(this);
 390
 391       wxNode *last = wxModalDialogs.Last();
 392
 393       // If there's still a modal dialog active, we
 394       // enable it, else we enable all modeless windows
 395       if (last)
 396       {
 397         wxDialog *box = (wxDialog *)last->Data();
 398         HWND hwnd = (HWND) box->GetHWND();
 399         if (box->m_winEnabled)
 400           EnableWindow(hwnd, TRUE);
 401         BringWindowToTop(hwnd);
 402       }
 403       else
 404       {
 405         wxNode *node = wxModelessWindows.First();
 406         while (node)
 407         {
 408           wxWindow *win = (wxWindow *)node->Data();
 409           HWND hwnd = (HWND) win->GetHWND();
 410           // Only enable again if not user-disabled.
 411           if (win->IsUserEnabled())
 412             EnableWindow(hwnd, TRUE);
 413           node = node->Next();
 414         }
 415       }
 416       // Try to highlight the correct window (the parent)
 417       HWND hWndParent = 0;
 418       if (GetParent())
 419       {
 420         hWndParent = (HWND) GetParent()->GetHWND();
 421         if (hWndParent)
 422           ::BringWindowToTop(hWndParent);
 423       }
 424       ShowWindow((HWND) GetHWND(), SW_HIDE);
 425       m_modalShowing = FALSE;
 426     }
 427   }
 428   else // !modal
 429   {
 430     if (show)
 431     {
 432       ShowWindow((HWND) GetHWND(), SW_SHOW);
 433       BringWindowToTop((HWND) GetHWND());
 434     }
 435     else
 436     {
 437       // Try to highlight the correct window (the parent)
 438       HWND hWndParent = 0;
 439       if (GetParent())
 440       {
 441         hWndParent = (HWND) GetParent()->GetHWND();
 442         if (hWndParent)
 443           ::BringWindowToTop(hWndParent);
 444       }
 445       ShowWindow((HWND) GetHWND(), SW_HIDE);
 446     }
 447   }
 448   return TRUE;
 449 }
 450
 451 void wxDialog::SetTitle(const wxString& title)
 452 {
 453   SetWindowText((HWND) GetHWND(), (const char *)title);
 454 }
 455
 456 wxString wxDialog::GetTitle(void) const
 457 {
 458   GetWindowText((HWND) GetHWND(), wxBuffer, 1000);
 459   return wxString(wxBuffer);
 460 }
 461
 462 void wxDialog::Centre(int direction)
 463 {
 464   int x_offset,y_offset ;
 465   int display_width, display_height;
 466   int  width, height, x, y;
 467   wxFrame *frame ;
 468   if (direction & wxCENTER_FRAME)
 469   {
 470     frame = (wxFrame*)GetParent() ;
 471     if (frame)
 472     {
 473       frame->GetPosition(&x_offset,&y_offset) ;
 474       frame->GetSize(&display_width,&display_height) ;
 475     }
 476   }
 477   else
 478     frame = NULL ;
 479
 480   if (frame==NULL)
 481   {
 482     wxDisplaySize(&display_width, &display_height);
 483     x_offset = 0 ;
 484     y_offset = 0 ;
 485   }
 486
 487
 488   GetSize(&width, &height);
 489   GetPosition(&x, &y);
 490
 491   if (direction & wxHORIZONTAL)
 492     x = (int)((display_width - width)/2);
 493   if (direction & wxVERTICAL)
 494     y = (int)((display_height - height)/2);
 495
 496   SetSize(x+x_offset, y+y_offset, width, height);
 497 }
 498
 499 // Replacement for Show(TRUE) for modal dialogs - returns return code
 500 int wxDialog::ShowModal(void)
 501 {
 502   m_windowStyle |= wxDIALOG_MODAL;
 503   Show(TRUE);
 504   return GetReturnCode();
 505 }
 506
 507 void wxDialog::EndModal(int retCode)
 508 {
 509   SetReturnCode(retCode);
 510   Show(FALSE);
 511 }
 512
 513 // Define for each class of dialog and control
 514 WXHBRUSH wxDialog::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 515       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 516 {
 517 #if CTL3D
 518   HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 519   return (WXHBRUSH) hbrush;
 520 #else
 521   return 0;
 522 #endif
 523 }
 524
 525 // Standard buttons
 526 void wxDialog::OnOK(wxCommandEvent& event)
 527 {
 528   if ( Validate() && TransferDataFromWindow() )
 529   {
 530         if ( IsModal() )
 531             EndModal(wxID_OK);
 532         else
 533         {
 534         SetReturnCode(wxID_OK);
 535         this->Show(FALSE);
 536         }
 537   }
 538 }
 539
 540 void wxDialog::OnApply(wxCommandEvent& event)
 541 {
 542   if (Validate())
 543     TransferDataFromWindow();
 544   // TODO probably need to disable the Apply button until things change again
 545 }
 546
 547 void wxDialog::OnCancel(wxCommandEvent& event)
 548 {
 549     if ( IsModal() )
 550         EndModal(wxID_CANCEL);
 551     else
 552     {
 553         SetReturnCode(wxID_CANCEL);
 554     this->Show(FALSE);
 555     }
 556 }
 557
 558 bool wxDialog::OnClose(void)
 559 {
 560   // Behaviour changed in 2.0: we'll send a Cancel message by default,
 561     // which may close the dialog.
 562     // Check for looping if the Cancel event handler calls Close()
 563
 564     static wxList closing;
 565
 566     if ( closing.Member(this) )
 567         return FALSE;
 568
 569     closing.Append(this);
 570
 571   wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 572   cancelEvent.SetEventObject( this );
 573   GetEventHandler()->ProcessEvent(cancelEvent);
 574
 575     closing.DeleteObject(this);
 576
 577   return FALSE;
 578 }
 579
 580 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 581 {
 582     // Compatibility
 583     if ( GetEventHandler()->OnClose() || event.GetForce())
 584     {
 585         this->Destroy();
 586     }
 587 }
 588
 589 // Destroy the window (delayed, if a managed window)
 590 bool wxDialog::Destroy(void)
 591 {
 592   if (!wxPendingDelete.Member(this))
 593     wxPendingDelete.Append(this);
 594   return TRUE;
 595 }
 596
 597 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& event)
 598 {
 599 #if CTL3D
 600   Ctl3dColorChange();
 601 #else
 602   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 603   SetDefaultBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 604   Refresh();
 605 #endif
 606 }
 607
 608 long wxDialog::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 609 {
 610   return wxWindow::MSWWindowProc(message, wParam, lParam);
 611 }
 612