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