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::SetSize(int x, int y, int width, int height, int WXUNUSED(sizeFlags))
 241 {
 242   wxWindow::SetSize(x, y, width, height);
 243 }
 244
 245 void wxDialog::SetClientSize(int width, int height)
 246 {
 247   HWND hWnd = (HWND) GetHWND();
 248   RECT rect;
 249   GetClientRect(hWnd, &rect);
 250
 251   RECT rect2;
 252   GetWindowRect(hWnd, &rect2);
 253
 254   // Find the difference between the entire window (title bar and all)
 255   // and the client area; add this to the new client size to move the
 256   // window
 257   int actual_width = rect2.right - rect2.left - rect.right + width;
 258   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 259
 260   MoveWindow(hWnd, rect2.left, rect2.top, actual_width, actual_height, TRUE);
 261
 262   wxSizeEvent event(wxSize(actual_width, actual_height), m_windowId);
 263   event.SetEventObject( this );
 264   GetEventHandler()->ProcessEvent(event);
 265 }
 266
 267 void wxDialog::GetPosition(int *x, int *y) const
 268 {
 269   HWND hWnd = (HWND) GetHWND();
 270   RECT rect;
 271   GetWindowRect(hWnd, &rect);
 272
 273   *x = rect.left;
 274   *y = rect.top;
 275 }
 276
 277 bool wxDialog::IsShown(void) const
 278 {
 279   return m_isShown;
 280 }
 281
 282 bool wxDialog::Show(bool show)
 283 {
 284   m_isShown = show;
 285
 286   if (show)
 287     InitDialog();
 288
 289   bool modal =  ((GetWindowStyleFlag() & wxDIALOG_MODAL) == wxDIALOG_MODAL) ;
 290
 291 #if WXGARBAGE_COLLECTION_ON /* MATTHEW: GC */
 292   if (!modal) {
 293     if (show) {
 294       if (!wxModelessWindows.Member(this))
 295   wxModelessWindows.Append(this);
 296     } else
 297       wxModelessWindows.DeleteObject(this);
 298   }
 299   if (show) {
 300     if (!wxTopLevelWindows.Member(this))
 301       wxTopLevelWindows.Append(this);
 302   } else
 303     wxTopLevelWindows.DeleteObject(this);
 304 #endif
 305
 306   if (modal)
 307   {
 308     if (show)
 309     {
 310       m_hwndOldFocus = (WXHWND)::GetFocus();
 311
 312       if (m_modalShowing)
 313       {
 314         BringWindowToTop((HWND) GetHWND());
 315         return TRUE;
 316       }
 317
 318       m_modalShowing = TRUE;
 319       wxNode *node = wxModalDialogs.First();
 320       while (node)
 321       {
 322         wxDialog *box = (wxDialog *)node->Data();
 323         if (box != this)
 324           ::EnableWindow((HWND) box->GetHWND(), FALSE);
 325         node = node->Next();
 326       }
 327
 328       // if we don't do it, some window might be deleted while we have pointers
 329       // to them in our disabledWindows list and the program will crash when it
 330       // will try to reenable them after the modal dialog end
 331       wxTheApp->DeletePendingObjects();
 332       wxList disabledWindows;
 333
 334       node = wxModelessWindows.First();
 335       while (node)
 336       {
 337         wxWindow *win = (wxWindow *)node->Data();
 338         if (::IsWindowEnabled((HWND) win->GetHWND()))
 339         {
 340           ::EnableWindow((HWND) win->GetHWND(), FALSE);
 341           disabledWindows.Append(win);
 342         }
 343         node = node->Next();
 344       }
 345
 346       ShowWindow((HWND) GetHWND(), SW_SHOW);
 347       EnableWindow((HWND) GetHWND(), TRUE);
 348       BringWindowToTop((HWND) GetHWND());
 349
 350       if (!wxModalDialogs.Member(this))
 351         wxModalDialogs.Append(this);
 352
 353       MSG msg;
 354       // Must test whether this dialog still exists: we may not process
 355       // a message before the deletion.
 356       while (wxModalDialogs.Member(this) && m_modalShowing && GetMessage(&msg, NULL, 0, 0))
 357       {
 358         if (m_acceleratorTable.Ok() &&
 359           ::TranslateAccelerator((HWND) GetHWND(), (HACCEL) m_acceleratorTable.GetHACCEL(), &msg))
 360         {
 361             // Have processed the message
 362         }
 363         else if (!IsDialogMessage((HWND) GetHWND(), &msg))
 364         {
 365           TranslateMessage(&msg);
 366           DispatchMessage(&msg);
 367         }
 368         if (m_modalShowing && !::PeekMessage(&msg, 0, 0, 0, PM_NOREMOVE))
 369         // dfgg: NB MUST test m_modalShowing again as the message loop could have triggered
 370         //       a Show(FALSE) in the mean time!!!
 371         // Without the test, we might delete the dialog before the end of modal showing.
 372         {
 373                 while (wxTheApp->ProcessIdle() && m_modalShowing)
 374                 {
 375                     // Keep going until we decide we've done enough
 376                 }
 377          }
 378       }
 379       // dfgg: now must specifically re-enable all other app windows that we disabled earlier
 380       node=disabledWindows.First();
 381       while(node) {
 382         wxWindow* win = (wxWindow*) node->Data();
 383         HWND hWnd = (HWND) win->GetHWND();
 384         if (::IsWindow(hWnd) && (wxModalDialogs.Member(win) || wxModelessWindows.Member(win) ))
 385           ::EnableWindow(hWnd,TRUE);
 386         node=node->Next();
 387       }
 388     }
 389     else // !show
 390     {
 391       ::SetFocus((HWND)m_hwndOldFocus);
 392
 393       wxModalDialogs.DeleteObject(this);
 394
 395       wxNode *last = wxModalDialogs.Last();
 396
 397       // If there's still a modal dialog active, we
 398       // enable it, else we enable all modeless windows
 399       if (last)
 400       {
 401         wxDialog *box = (wxDialog *)last->Data();
 402         HWND hwnd = (HWND) box->GetHWND();
 403         if (box->m_winEnabled)
 404           EnableWindow(hwnd, TRUE);
 405         BringWindowToTop(hwnd);
 406       }
 407       else
 408       {
 409         wxNode *node = wxModelessWindows.First();
 410         while (node)
 411         {
 412           wxWindow *win = (wxWindow *)node->Data();
 413           HWND hwnd = (HWND) win->GetHWND();
 414           // Only enable again if not user-disabled.
 415           if (win->IsUserEnabled())
 416             EnableWindow(hwnd, TRUE);
 417           node = node->Next();
 418         }
 419       }
 420       // Try to highlight the correct window (the parent)
 421       HWND hWndParent = 0;
 422       if (GetParent())
 423       {
 424         hWndParent = (HWND) GetParent()->GetHWND();
 425         if (hWndParent)
 426           ::BringWindowToTop(hWndParent);
 427       }
 428       ShowWindow((HWND) GetHWND(), SW_HIDE);
 429       m_modalShowing = FALSE;
 430     }
 431   }
 432   else // !modal
 433   {
 434     if (show)
 435     {
 436       ShowWindow((HWND) GetHWND(), SW_SHOW);
 437       BringWindowToTop((HWND) GetHWND());
 438     }
 439     else
 440     {
 441       // Try to highlight the correct window (the parent)
 442       HWND hWndParent = 0;
 443       if (GetParent())
 444       {
 445         hWndParent = (HWND) GetParent()->GetHWND();
 446         if (hWndParent)
 447           ::BringWindowToTop(hWndParent);
 448       }
 449       ShowWindow((HWND) GetHWND(), SW_HIDE);
 450     }
 451   }
 452   return TRUE;
 453 }
 454
 455 void wxDialog::SetTitle(const wxString& title)
 456 {
 457   SetWindowText((HWND) GetHWND(), (const char *)title);
 458 }
 459
 460 wxString wxDialog::GetTitle(void) const
 461 {
 462   GetWindowText((HWND) GetHWND(), wxBuffer, 1000);
 463   return wxString(wxBuffer);
 464 }
 465
 466 void wxDialog::Centre(int direction)
 467 {
 468   int x_offset,y_offset ;
 469   int display_width, display_height;
 470   int  width, height, x, y;
 471   wxWindow *parent = GetParent();
 472   if ((direction & wxCENTER_FRAME) && parent)
 473   {
 474       parent->GetPosition(&x_offset,&y_offset) ;
 475       parent->GetSize(&display_width,&display_height) ;
 476   }
 477   else
 478   {
 479     wxDisplaySize(&display_width, &display_height);
 480     x_offset = 0 ;
 481     y_offset = 0 ;
 482   }
 483
 484   GetSize(&width, &height);
 485   GetPosition(&x, &y);
 486
 487   if (direction & wxHORIZONTAL)
 488     x = (int)((display_width - width)/2);
 489   if (direction & wxVERTICAL)
 490     y = (int)((display_height - height)/2);
 491
 492   SetSize(x+x_offset, y+y_offset, width, height);
 493 }
 494
 495 // Replacement for Show(TRUE) for modal dialogs - returns return code
 496 int wxDialog::ShowModal(void)
 497 {
 498   m_windowStyle |= wxDIALOG_MODAL;
 499   Show(TRUE);
 500   return GetReturnCode();
 501 }
 502
 503 void wxDialog::EndModal(int retCode)
 504 {
 505   SetReturnCode(retCode);
 506   Show(FALSE);
 507 }
 508
 509 // Define for each class of dialog and control
 510 WXHBRUSH wxDialog::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 511       WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 512 {
 513 #if CTL3D
 514   HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 515   return (WXHBRUSH) hbrush;
 516 #else
 517   return 0;
 518 #endif
 519 }
 520
 521 // Standard buttons
 522 void wxDialog::OnOK(wxCommandEvent& event)
 523 {
 524   if ( Validate() && TransferDataFromWindow() )
 525   {
 526         if ( IsModal() )
 527             EndModal(wxID_OK);
 528         else
 529         {
 530             SetReturnCode(wxID_OK);
 531             this->Show(FALSE);
 532         }
 533   }
 534 }
 535
 536 void wxDialog::OnApply(wxCommandEvent& event)
 537 {
 538   if (Validate())
 539     TransferDataFromWindow();
 540   // TODO probably need to disable the Apply button until things change again
 541 }
 542
 543 void wxDialog::OnCancel(wxCommandEvent& event)
 544 {
 545     if ( IsModal() )
 546         EndModal(wxID_CANCEL);
 547     else
 548     {
 549         SetReturnCode(wxID_CANCEL);
 550     this->Show(FALSE);
 551     }
 552 }
 553
 554 bool wxDialog::OnClose(void)
 555 {
 556     // Behaviour changed in 2.0: we'll send a Cancel message by default,
 557     // which may close the dialog.
 558     // Check for looping if the Cancel event handler calls Close()
 559
 560     static wxList closing;
 561
 562     if ( closing.Member(this) )
 563         return FALSE;
 564
 565     closing.Append(this);
 566
 567     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 568     cancelEvent.SetEventObject( this );
 569     GetEventHandler()->ProcessEvent(cancelEvent);
 570
 571     closing.DeleteObject(this);
 572
 573     return FALSE;
 574 }
 575
 576 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 577 {
 578     // Compatibility
 579     if ( GetEventHandler()->OnClose() || event.GetForce())
 580     {
 581         this->Destroy();
 582     }
 583     else
 584         event.Veto(TRUE);
 585 }
 586
 587 // Destroy the window (delayed, if a managed window)
 588 bool wxDialog::Destroy(void)
 589 {
 590   if (!wxPendingDelete.Member(this))
 591     wxPendingDelete.Append(this);
 592   return TRUE;
 593 }
 594
 595 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& event)
 596 {
 597 #if CTL3D
 598   Ctl3dColorChange();
 599 #else
 600   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 601   Refresh();
 602 #endif
 603 }
 604
 605 long wxDialog::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 606 {
 607   return wxWindow::MSWWindowProc(message, wParam, lParam);
 608 }
 609