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