src/os2/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/os2/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 #include "wx/dialog.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/utils.h"
  19     #include "wx/frame.h"
  20     #include "wx/app.h"
  21     #include "wx/settings.h"
  22     #include "wx/intl.h"
  23     #include "wx/log.h"
  24 #endif
  25
  26 #include "wx/os2/private.h"
  27 #include "wx/evtloop.h"
  28 #include "wx/ptr_scpd.h"
  29
  30 #define wxDIALOG_DEFAULT_X 300
  31 #define wxDIALOG_DEFAULT_Y 300
  32
  33 #define wxDIALOG_DEFAULT_WIDTH 500
  34 #define wxDIALOG_DEFAULT_HEIGHT 500
  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
  45     EVT_CLOSE(wxDialog::OnCloseWindow)
  46 END_EVENT_TABLE()
  47
  48 // ----------------------------------------------------------------------------
  49 // wxDialogModalData
  50 // ----------------------------------------------------------------------------
  51
  52 // this is simply a container for any data we need to implement modality which
  53 // allows us to avoid changing wxDialog each time the implementation changes
  54 class wxDialogModalData
  55 {
  56 public:
  57     wxDialogModalData(wxDialog *dialog) : m_evtLoop(dialog) { }
  58
  59     void RunLoop()
  60     {
  61         m_evtLoop.Run();
  62     }
  63
  64     void ExitLoop()
  65     {
  66         m_evtLoop.Exit();
  67     }
  68
  69 private:
  70     wxModalEventLoop m_evtLoop;
  71 };
  72
  73 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxDialogModalData);
  74
  75 // ============================================================================
  76 // implementation
  77 // ============================================================================
  78
  79 // ----------------------------------------------------------------------------
  80 // wxDialog construction
  81 // ----------------------------------------------------------------------------
  82
  83 void wxDialog::Init()
  84 {
  85     m_pOldFocus = (wxWindow *)NULL;
  86     m_isShown = false;
  87     m_pWindowDisabler = (wxWindowDisabler *)NULL;
  88     m_modalData = NULL;
  89     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
  90 } // end of wxDialog::Init
  91
  92 bool wxDialog::Create( wxWindow*       pParent,
  93                        wxWindowID      vId,
  94                        const wxString& rsTitle,
  95                        const wxPoint&  rPos,
  96                        const wxSize&   rSize,
  97                        long            lStyle,
  98                        const wxString& rsName )
  99 {
 100     Init();
 101     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
 102
 103     //
 104     // Save focus before doing anything which can potentially change it
 105     //
 106     m_pOldFocus = FindFocus();
 107
 108     //
 109     // All dialogs should really have this style
 110     //
 111     lStyle |= wxTAB_TRAVERSAL;
 112
 113     if (!wxTopLevelWindow::Create( pParent
 114                                   ,vId
 115                                   ,rsTitle
 116                                   ,rPos
 117                                   ,rSize
 118                                   ,lStyle
 119                                   ,rsName
 120                                  ))
 121         return false;
 122
 123     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 124
 125     //
 126     // Must defer setting the title until after dialog is created and sized
 127     //
 128     if (!rsTitle.IsNull())
 129         SetTitle(rsTitle);
 130     return true;
 131 } // end of wxDialog::Create
 132
 133 #if WXWIN_COMPATIBILITY_2_6
 134
 135 // deprecated ctor
 136 wxDialog::wxDialog(wxWindow *parent,
 137                    const wxString& title,
 138                    bool WXUNUSED(modal),
 139                    int x,
 140                    int y,
 141                    int w,
 142                    int h,
 143                    long style,
 144                    const wxString& name)
 145 {
 146     Init();
 147
 148     Create(parent, wxID_ANY, title, wxPoint(x, y), wxSize(w, h), style, name);
 149 }
 150
 151 void wxDialog::SetModal(bool WXUNUSED(bFlag))
 152 {
 153     // nothing to do, obsolete method
 154 } // end of wxDialog::SetModal
 155
 156 #endif // WXWIN_COMPATIBILITY_2_6
 157
 158 wxDialog::~wxDialog()
 159 {
 160     m_isBeingDeleted = true;
 161
 162     // this will also reenable all the other windows for a modal dialog
 163     Show(false);
 164 } // end of wxDialog::~wxDialog
 165
 166 //
 167 // By default, pressing escape cancels the dialog
 168 //
 169 void wxDialog::OnCharHook(
 170   wxKeyEvent&                       rEvent
 171 )
 172 {
 173     if (GetHWND())
 174     {
 175         if (rEvent.m_keyCode == WXK_ESCAPE)
 176         {
 177             //
 178             // Behaviour changed in 2.0: we'll send a Cancel message
 179             // to the dialog instead of Close.
 180             //
 181             wxCommandEvent          vCancelEvent( wxEVT_COMMAND_BUTTON_CLICKED
 182                                                  ,wxID_CANCEL
 183                                                 );
 184
 185             vCancelEvent.SetEventObject( this );
 186             GetEventHandler()->ProcessEvent(vCancelEvent);
 187
 188             //
 189             // Ensure that there is another message for this window so the
 190             // ShowModal loop will exit and won't get stuck in GetMessage().
 191             //
 192             ::WinPostMsg(GetHwnd(), WM_NULL, 0, 0);
 193             return;
 194         }
 195     }
 196     // We didn't process this event.
 197     rEvent.Skip();
 198 }
 199
 200 // ----------------------------------------------------------------------------
 201 // showing the dialogs
 202 // ----------------------------------------------------------------------------
 203
 204 #if WXWIN_COMPATIBILITY_2_6
 205
 206 bool wxDialog::IsModalShowing() const
 207 {
 208     return IsModal();
 209 } // end of wxDialog::IsModalShowing
 210
 211 #endif // WXWIN_COMPATIBILITY_2_6
 212
 213 wxWindow *wxDialog::FindSuitableParent() const
 214 {
 215     // first try to use the currently active window
 216     HWND hwndFg = ::WinQueryActiveWindow(HWND_DESKTOP);
 217     wxWindow *parent = hwndFg ? wxFindWinFromHandle((WXHWND)hwndFg)
 218                               : NULL;
 219     if ( !parent )
 220     {
 221         // next try the main app window
 222         parent = wxTheApp->GetTopWindow();
 223     }
 224
 225     // finally, check if the parent we found is really suitable
 226     if ( !parent || parent == (wxWindow *)this || !parent->IsShown() )
 227     {
 228         // don't use this one
 229         parent = NULL;
 230     }
 231
 232     return parent;
 233 }
 234
 235 bool wxDialog::Show( bool bShow )
 236 {
 237     if ( bShow == IsShown() )
 238         return false;
 239
 240     if (!bShow && m_modalData )
 241     {
 242         // we need to do this before calling wxDialogBase version because if we
 243         // had disabled other app windows, they must be reenabled right now as
 244         // if they stay disabled Windows will activate another window (one
 245         // which is enabled, anyhow) when we're hidden in the base class Show()
 246         // and we will lose activation
 247         m_modalData->ExitLoop();
 248 #if 0
 249         if (m_pWindowDisabler)
 250         {
 251             delete m_pWindowDisabler;
 252             m_pWindowDisabler = NULL;
 253         }
 254 #endif
 255     }
 256
 257     if (bShow)
 258     {
 259         // this usually will result in TransferDataToWindow() being called
 260         // which will change the controls values so do it before showing as
 261         // otherwise we could have some flicker
 262         InitDialog();
 263     }
 264
 265     wxDialogBase::Show(bShow);
 266
 267     wxString title = GetTitle();
 268     if (!title.empty())
 269         ::WinSetWindowText((HWND)GetHwnd(), (PSZ)title.c_str());
 270
 271     if ( bShow )
 272     {
 273         // dialogs don't get WM_SIZE message after creation unlike most (all?)
 274         // other windows and so could start their life not laid out correctly
 275         // if we didn't call Layout() from here
 276         //
 277         // NB: normally we should call it just the first time but doing it
 278         //     every time is simpler than keeping a flag
 279         Layout();
 280     }
 281
 282     return true;
 283 } // end of wxDialog::Show
 284
 285 //
 286 // Replacement for Show(true) for modal dialogs - returns return code
 287 //
 288 int wxDialog::ShowModal()
 289 {
 290     wxASSERT_MSG( !IsModal(), _T("wxDialog::ShowModal() reentered?") );
 291
 292     m_endModalCalled = false;
 293
 294     Show();
 295
 296     // EndModal may have been called from InitDialog handler (called from
 297     // inside Show()), which would cause an infinite loop if we didn't take it
 298     // into account
 299     if ( !m_endModalCalled )
 300     {
 301         // modal dialog needs a parent window, so try to find one
 302         wxWindow *parent = GetParent();
 303         if ( !parent )
 304         {
 305             parent = FindSuitableParent();
 306         }
 307
 308         // remember where the focus was
 309         wxWindow *oldFocus = m_pOldFocus;
 310         if ( !oldFocus )
 311         {
 312             // VZ: do we really want to do this?
 313             oldFocus = parent;
 314         }
 315
 316         // We have to remember the HWND because we need to check
 317         // the HWND still exists (oldFocus can be garbage when the dialog
 318         // exits, if it has been destroyed)
 319         HWND hwndOldFocus = oldFocus ? GetHwndOf(oldFocus) : NULL;
 320
 321
 322         //
 323         // Before entering the modal loop, reset the "is in OnIdle()" flag (see
 324         // comment in app.cpp)
 325         //
 326         extern bool                     gbInOnIdle;
 327         bool                            bWasInOnIdle = gbInOnIdle;
 328
 329         gbInOnIdle = false;
 330
 331         // enter and run the modal loop
 332         {
 333             wxDialogModalDataTiedPtr modalData(&m_modalData,
 334                                                new wxDialogModalData(this));
 335             modalData->RunLoop();
 336         }
 337         gbInOnIdle = bWasInOnIdle;
 338
 339         // and restore focus
 340         // Note that this code MUST NOT access the dialog object's data
 341         // in case the object has been deleted (which will be the case
 342         // for a modal dialog that has been destroyed before calling EndModal).
 343         if ( oldFocus && (oldFocus != this) && ::WinIsWindow(vHabmain, hwndOldFocus))
 344         {
 345             // This is likely to prove that the object still exists
 346             if (wxFindWinFromHandle((WXHWND) hwndOldFocus) == oldFocus)
 347                 oldFocus->SetFocus();
 348         }
 349     }
 350
 351     return GetReturnCode();
 352 } // end of wxDialog::ShowModal
 353
 354 void wxDialog::EndModal(
 355   int                               nRetCode
 356 )
 357 {
 358     wxASSERT_MSG( IsModal(), _T("EndModal() called for non modal dialog") );
 359
 360     m_endModalCalled = true;
 361     SetReturnCode(nRetCode);
 362
 363     Hide();
 364 } // end of wxDialog::EndModal
 365
 366 void wxDialog::EndDialog(int rc)
 367 {
 368     if ( IsModal() )
 369         EndModal(rc);
 370     else
 371         Hide();
 372 }
 373
 374 // ----------------------------------------------------------------------------
 375 // wxWin event handlers
 376 // ----------------------------------------------------------------------------
 377
 378 void wxDialog::OnApply( wxCommandEvent& WXUNUSED(rEvent) )
 379 {
 380     if (Validate())
 381         TransferDataFromWindow();
 382 } // end of wxDialog::OnApply
 383
 384 // Standard buttons
 385 void wxDialog::OnOK( wxCommandEvent& WXUNUSED(rEvent) )
 386 {
 387     if ( Validate() && TransferDataFromWindow() )
 388     {
 389         EndDialog(wxID_OK);
 390     }
 391 } // end of wxDialog::OnOK
 392
 393 void wxDialog::OnCancel( wxCommandEvent& WXUNUSED(rEvent) )
 394 {
 395     EndDialog(wxID_CANCEL);
 396 } // end of wxDialog::OnCancel
 397
 398 void wxDialog::OnCloseWindow( wxCloseEvent& WXUNUSED(rEvent) )
 399 {
 400     //
 401     // We'll send a Cancel message by default, which may close the dialog.
 402     // Check for looping if the Cancel event handler calls Close().
 403     //
 404     // Note that if a cancel button and handler aren't present in the dialog,
 405     // nothing will happen when you close the dialog via the window manager, or
 406     // via Close().
 407     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 408     // created on the stack.
 409     // However, this does mean that calling dialog->Close() won't delete the dialog
 410     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 411     // sure to destroy the dialog.
 412     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 413     //
 414
 415     //
 416     // Ugh???  This is not good but until I figure out a global list it'll have to do
 417     //
 418     static wxList closing;
 419
 420     if ( closing.Member(this) )
 421         return;
 422
 423     closing.Append(this);
 424
 425     wxCommandEvent vCancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 426
 427     vCancelEvent.SetEventObject( this );
 428     GetEventHandler()->ProcessEvent(vCancelEvent); // This may close the dialog
 429
 430     closing.DeleteObject(this);
 431 } // end of wxDialog::OnCloseWindow
 432
 433 void wxDialog::OnSysColourChanged( wxSysColourChangedEvent& WXUNUSED(rEvent) )
 434 {
 435     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 436     Refresh();
 437 } // end of wxDialog::OnSysColourChanged
 438
 439 MRESULT wxDialog::OS2WindowProc( WXUINT uMessage, WXWPARAM wParam, WXLPARAM lParam )
 440 {
 441     MRESULT  rc = 0;
 442     bool     bProcessed = false;
 443
 444     switch (uMessage)
 445     {
 446         case WM_CLOSE:
 447             //
 448             // If we can't close, tell the system that we processed the
 449             // message - otherwise it would close us
 450             //
 451             bProcessed = !Close();
 452             break;
 453     }
 454
 455     if (!bProcessed)
 456         rc = wxWindow::OS2WindowProc( uMessage
 457                                      ,wParam
 458                                      ,lParam
 459                                     );
 460     return rc;
 461 } // end of wxDialog::OS2WindowProc