src/os2/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dialog.cpp
   3 // Purpose:     wxDialog class
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/14/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifndef WX_PRECOMP
  16 #include "wx/dialog.h"
  17 #include "wx/utils.h"
  18 #include "wx/frame.h"
  19 #include "wx/app.h"
  20 #include "wx/settings.h"
  21 #include "wx/intl.h"
  22 #include "wx/log.h"
  23 #endif
  24
  25 #include "wx/os2/private.h"
  26 #include "wx/log.h"
  27
  28 #define wxDIALOG_DEFAULT_X 300
  29 #define wxDIALOG_DEFAULT_Y 300
  30
  31 #define wxDIALOG_DEFAULT_WIDTH 500
  32 #define wxDIALOG_DEFAULT_HEIGHT 500
  33
  34 wxWindowList wxModalDialogs;
  35
  36 IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxTopLevelWindow)
  37
  38 BEGIN_EVENT_TABLE(wxDialog, wxDialogBase)
  39     EVT_BUTTON(wxID_OK, wxDialog::OnOK)
  40     EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
  41     EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
  42     EVT_CHAR_HOOK(wxDialog::OnCharHook)
  43     EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
  44     EVT_CLOSE(wxDialog::OnCloseWindow)
  45 END_EVENT_TABLE()
  46
  47 void wxDialog::Init()
  48 {
  49     m_pOldFocus = (wxWindow *)NULL;
  50     m_isShown = FALSE;
  51     m_pWindowDisabler = (wxWindowDisabler *)NULL;
  52     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
  53 } // end of wxDialog::Init
  54
  55 bool wxDialog::Create(
  56   wxWindow*                         pParent
  57 , wxWindowID                        vId
  58 , const wxString&                   rsTitle
  59 , const wxPoint&                    rPos
  60 , const wxSize&                     rSize
  61 , long                              lStyle
  62 , const wxString&                   rsName
  63 )
  64 {
  65     long                            lX = rPos.x;
  66     long                            lY = rPos.y;
  67     long                            lWidth = rSize.x;
  68     long                            lHeight = rSize.y;
  69     const char*                     zDlg;
  70     WXDWORD                         dwExtendedStyle = 0L;
  71     HWND                            hWnd;
  72
  73     Init();
  74     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
  75
  76     //
  77     // Save focus before doing anything which can potentially change it
  78     //
  79     m_pOldFocus = FindFocus();
  80
  81     //
  82     // All dialogs should really have this style
  83     //
  84     lStyle |= wxTAB_TRAVERSAL;
  85
  86     if (!wxTopLevelWindow::Create( pParent
  87                                   ,vId
  88                                   ,rsTitle
  89                                   ,rPos
  90                                   ,rSize
  91                                   ,lStyle
  92                                   ,rsName
  93                                  ))
  94         return FALSE;
  95     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
  96
  97     //
  98     // Must defer setting the title until after dialog is created and sized
  99     //
 100     if (!rsTitle.IsNull())
 101         SetTitle(rsTitle);
 102     return TRUE;
 103 } // end of wxDialog::Create
 104
 105 void wxDialog::SetModal(
 106   bool                              bFlag
 107 )
 108 {
 109     if (bFlag)
 110     {
 111         m_windowStyle |= wxDIALOG_MODAL ;
 112         wxModelessWindows.DeleteObject(this);
 113     }
 114     else
 115     {
 116         m_windowStyle &= ~wxDIALOG_MODAL ;
 117         wxModelessWindows.Append(this);
 118     }
 119 } // end of wxDialog::SetModal
 120
 121 wxDialog::~wxDialog()
 122 {
 123     m_isBeingDeleted = TRUE;
 124     Show(FALSE);
 125 } // end of wxDialog::~wxDialog
 126
 127 //
 128 // By default, pressing escape cancels the dialog
 129 //
 130 void wxDialog::OnCharHook(
 131   wxKeyEvent&                       rEvent
 132 )
 133 {
 134     if (GetHWND())
 135     {
 136         if (rEvent.m_keyCode == WXK_ESCAPE)
 137         {
 138             //
 139             // Behaviour changed in 2.0: we'll send a Cancel message
 140             // to the dialog instead of Close.
 141             //
 142             wxCommandEvent          vCancelEvent( wxEVT_COMMAND_BUTTON_CLICKED
 143                                                  ,wxID_CANCEL
 144                                                 );
 145
 146             vCancelEvent.SetEventObject( this );
 147             GetEventHandler()->ProcessEvent(vCancelEvent);
 148
 149             //
 150             // Ensure that there is another message for this window so the
 151             // ShowModal loop will exit and won't get stuck in GetMessage().
 152             //
 153             ::WinPostMsg(GetHwnd(), WM_NULL, 0, 0);
 154             return;
 155         }
 156     }
 157     // We didn't process this event.
 158     rEvent.Skip();
 159 }
 160
 161 // ----------------------------------------------------------------------------
 162 // showing the dialogs
 163 // ----------------------------------------------------------------------------
 164
 165 bool wxDialog::IsModal() const
 166 {
 167     return (GetWindowStyleFlag() & wxDIALOG_MODAL) != 0;
 168 } // end of wxDialog::IsModal
 169
 170 bool wxDialog::IsModalShowing() const
 171 {
 172     return wxModalDialogs.Find((wxDialog *)this) != NULL; // const_cast
 173 } // end of wxDialog::IsModalShowing
 174
 175 void wxDialog::DoShowModal()
 176 {
 177     wxWindow*                       pParent = GetParent();
 178     wxWindow*                       pOldFocus = m_pOldFocus;
 179     HWND                            hWndOldFocus = 0;
 180
 181     wxCHECK_RET( !IsModalShowing(), _T("DoShowModal() called twice") );
 182     wxCHECK_RET( IsModal(), _T("can't DoShowModal() modeless dialog") );
 183
 184     wxModalDialogs.Append(this);
 185     if (pOldFocus)
 186         hWndOldFocus = (HWND)pOldFocus->GetHWND();
 187
 188     //
 189     // Remember where the focus was
 190     //
 191     if (!pOldFocus)
 192     {
 193         pOldFocus = pParent;
 194         if (pParent)
 195             hWndOldFocus = GetHwndOf(pParent);
 196     }
 197
 198     //
 199     // Disable all other app windows
 200     //
 201     wxASSERT_MSG(!m_pWindowDisabler, _T("disabling windows twice?"));
 202
 203     m_pWindowDisabler = new wxWindowDisabler(this);
 204
 205     //
 206     // Enter the modal loop
 207     //
 208     while ( IsModalShowing() )
 209     {
 210 #if wxUSE_THREADS
 211         wxMutexGuiLeaveOrEnter();
 212 #endif // wxUSE_THREADS
 213
 214         while ( !wxTheApp->Pending() && wxTheApp->ProcessIdle() )
 215             ;
 216
 217         // a message came or no more idle processing to do
 218         wxTheApp->DoMessage();
 219     }
 220
 221     //
 222     // Snd restore focus
 223     // Note that this code MUST NOT access the dialog object's data
 224     // in case the object has been deleted (which will be the case
 225     // for a modal dialog that has been destroyed before calling EndModal).
 226     //
 227     if (pOldFocus && (pOldFocus != this) && ::WinIsWindow(vHabmain, hWndOldFocus))
 228     {
 229         //
 230         // This is likely to prove that the object still exists
 231         //
 232         if (wxFindWinFromHandle((WXHWND) hWndOldFocus) == pOldFocus)
 233             pOldFocus->SetFocus();
 234     }
 235 } // end of wxDialog::DoShowModal
 236
 237 bool wxDialog::Show(
 238   bool                              bShow
 239 )
 240 {
 241     if (!bShow)
 242     {
 243         //
 244         // If we had disabled other app windows, reenable them back now because
 245         // if they stay disabled Windows will activate another window (one
 246         // which is enabled, anyhow) and we will lose activation
 247         //
 248         if (m_pWindowDisabler)
 249         {
 250             delete m_pWindowDisabler;
 251             m_pWindowDisabler = NULL;
 252         }
 253     }
 254
 255     //
 256     // ShowModal() may be called for already shown dialog
 257     //
 258     if (!wxDialogBase::Show(bShow) && !(bShow && IsModal()))
 259     {
 260         //
 261         // Nothing to do
 262         //
 263         return FALSE;
 264     }
 265
 266     if (bShow)
 267     {
 268         //
 269         // Usually will result in TransferDataToWindow() being called
 270         //
 271         InitDialog();
 272     }
 273
 274     if (GetTitle().c_str())
 275         ::WinSetWindowText((HWND)GetHwnd(), GetTitle().c_str());
 276     if (IsModal())
 277     {
 278         if (bShow)
 279         {
 280             //
 281             // Modal dialog needs a parent window, so try to find one
 282             //
 283             if (!GetParent())
 284             {
 285                 wxWindow*           pParent = wxTheApp->GetTopWindow();
 286
 287                 if ( pParent && pParent != this && pParent->IsShown() )
 288                 {
 289                     //
 290                     // Use it
 291                     //
 292                     m_parent = pParent;
 293
 294                 }
 295             }
 296             DoShowModal();
 297         }
 298         else // end of modal dialog
 299         {
 300             //
 301             // This will cause IsModalShowing() return FALSE and our local
 302             // message loop will terminate
 303             //
 304             wxModalDialogs.DeleteObject(this);
 305         }
 306     }
 307     return TRUE;
 308 } // end of wxDialog::Show
 309
 310 //
 311 // Replacement for Show(TRUE) for modal dialogs - returns return code
 312 //
 313 int wxDialog::ShowModal()
 314 {
 315     if (!IsModal())
 316     {
 317         SetModal(TRUE);
 318     }
 319     Show(TRUE);
 320     return GetReturnCode();
 321 } // end of wxDialog::ShowModal
 322
 323 void wxDialog::EndModal(
 324   int                               nRetCode
 325 )
 326 {
 327     SetReturnCode(nRetCode);
 328     Show(FALSE);
 329 } // end of wxDialog::EndModal
 330
 331 // ----------------------------------------------------------------------------
 332 // wxWin event handlers
 333 // ----------------------------------------------------------------------------
 334
 335 void wxDialog::OnApply(
 336   wxCommandEvent&                   rEvent
 337 )
 338 {
 339     if (Validate())
 340         TransferDataFromWindow();
 341 } // end of wxDialog::OnApply
 342
 343 // Standard buttons
 344 void wxDialog::OnOK(
 345   wxCommandEvent&                   rEvent
 346 )
 347 {
 348     if ( Validate() && TransferDataFromWindow() )
 349     {
 350         EndModal(wxID_OK);
 351     }
 352 } // end of wxDialog::OnOK
 353
 354 void wxDialog::OnCancel(
 355   wxCommandEvent&                   rEvent
 356 )
 357 {
 358     EndModal(wxID_CANCEL);
 359 } // end of wxDialog::OnCancel
 360
 361 void wxDialog::OnCloseWindow(
 362   wxCloseEvent&                     rEvent
 363 )
 364 {
 365     //
 366     // We'll send a Cancel message by default,
 367     // which may close the dialog.
 368     // Check for looping if the Cancel event handler calls Close().
 369     //
 370     // Note that if a cancel button and handler aren't present in the dialog,
 371     // nothing will happen when you close the dialog via the window manager, or
 372     // via Close().
 373     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 374     // created on the stack.
 375     // However, this does mean that calling dialog->Close() won't delete the dialog
 376     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 377     // sure to destroy the dialog.
 378     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 379     //
 380
 381     //
 382     // Ugh???  This is not good but until I figure out a global list it'll have to do
 383     //
 384     static wxList closing;
 385
 386     if ( closing.Member(this) )
 387         return;
 388
 389     closing.Append(this);
 390
 391     wxCommandEvent                  vCancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 392
 393     vCancelEvent.SetEventObject( this );
 394     GetEventHandler()->ProcessEvent(vCancelEvent); // This may close the dialog
 395
 396     closing.DeleteObject(this);
 397 } // end of wxDialog::OnCloseWindow
 398
 399 void wxDialog::OnSysColourChanged(
 400   wxSysColourChangedEvent&          rEvent
 401 )
 402 {
 403     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 404     Refresh();
 405 } // end of wxDialog::OnSysColourChanged
 406
 407 MRESULT wxDialog::OS2WindowProc(
 408   WXUINT                            uMessage
 409 , WXWPARAM                          wParam
 410 , WXLPARAM                          lParam
 411 )
 412 {
 413     MRESULT                         rc = 0;
 414     bool                            bProcessed = FALSE;
 415
 416     switch (uMessage)
 417     {
 418         case WM_CLOSE:
 419             //
 420             // If we can't close, tell the system that we processed the
 421             // message - otherwise it would close us
 422             //
 423             bProcessed = !Close();
 424             break;
 425     }
 426
 427     if (!bProcessed)
 428         rc = wxWindow::OS2WindowProc( uMessage
 429                                      ,wParam
 430                                      ,lParam
 431                                     );
 432     return rc;
 433 } // end of wxDialog::OS2WindowProc
 434