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 #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 #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 // deprecated ctor
 134 wxDialog::wxDialog(wxWindow *parent,
 135                    const wxString& title,
 136                    bool WXUNUSED(modal),
 137                    int x,
 138                    int y,
 139                    int w,
 140                    int h,
 141                    long style,
 142                    const wxString& name)
 143 {
 144     Init();
 145
 146     Create(parent, wxID_ANY, title, wxPoint(x, y), wxSize(w, h), style, name);
 147 }
 148
 149 void wxDialog::SetModal(
 150   bool                              WXUNUSED(bFlag)
 151 )
 152 {
 153     // nothing to do, obsolete method
 154 } // end of wxDialog::SetModal
 155
 156 wxDialog::~wxDialog()
 157 {
 158     m_isBeingDeleted = true;
 159
 160     // this will also reenable all the other windows for a modal dialog
 161     Show(false);
 162 } // end of wxDialog::~wxDialog
 163
 164 //
 165 // By default, pressing escape cancels the dialog
 166 //
 167 void wxDialog::OnCharHook(
 168   wxKeyEvent&                       rEvent
 169 )
 170 {
 171     if (GetHWND())
 172     {
 173         if (rEvent.m_keyCode == WXK_ESCAPE)
 174         {
 175             //
 176             // Behaviour changed in 2.0: we'll send a Cancel message
 177             // to the dialog instead of Close.
 178             //
 179             wxCommandEvent          vCancelEvent( wxEVT_COMMAND_BUTTON_CLICKED
 180                                                  ,wxID_CANCEL
 181                                                 );
 182
 183             vCancelEvent.SetEventObject( this );
 184             GetEventHandler()->ProcessEvent(vCancelEvent);
 185
 186             //
 187             // Ensure that there is another message for this window so the
 188             // ShowModal loop will exit and won't get stuck in GetMessage().
 189             //
 190             ::WinPostMsg(GetHwnd(), WM_NULL, 0, 0);
 191             return;
 192         }
 193     }
 194     // We didn't process this event.
 195     rEvent.Skip();
 196 }
 197
 198 // ----------------------------------------------------------------------------
 199 // showing the dialogs
 200 // ----------------------------------------------------------------------------
 201
 202 bool wxDialog::IsModalShowing() const
 203 {
 204     return IsModal();
 205 } // end of wxDialog::IsModalShowing
 206
 207
 208 wxWindow *wxDialog::FindSuitableParent() const
 209 {
 210     // first try to use the currently active window
 211     HWND hwndFg = ::WinQueryActiveWindow(HWND_DESKTOP);
 212     wxWindow *parent = hwndFg ? wxFindWinFromHandle((WXHWND)hwndFg)
 213                               : NULL;
 214     if ( !parent )
 215     {
 216         // next try the main app window
 217         parent = wxTheApp->GetTopWindow();
 218     }
 219
 220     // finally, check if the parent we found is really suitable
 221     if ( !parent || parent == (wxWindow *)this || !parent->IsShown() )
 222     {
 223         // don't use this one
 224         parent = NULL;
 225     }
 226
 227     return parent;
 228 }
 229
 230 bool wxDialog::Show( bool bShow )
 231 {
 232     if ( bShow == IsShown() )
 233         return false;
 234
 235     if (!bShow && m_modalData )
 236     {
 237         // we need to do this before calling wxDialogBase version because if we
 238         // had disabled other app windows, they must be reenabled right now as
 239         // if they stay disabled Windows will activate another window (one
 240         // which is enabled, anyhow) when we're hidden in the base class Show()
 241         // and we will lose activation
 242         m_modalData->ExitLoop();
 243 #if 0
 244         if (m_pWindowDisabler)
 245         {
 246             delete m_pWindowDisabler;
 247             m_pWindowDisabler = NULL;
 248         }
 249 #endif
 250     }
 251
 252     if (bShow)
 253     {
 254         // this usually will result in TransferDataToWindow() being called
 255         // which will change the controls values so do it before showing as
 256         // otherwise we could have some flicker
 257         InitDialog();
 258     }
 259
 260     wxDialogBase::Show(bShow);
 261
 262     wxString title = GetTitle();
 263     if (!title.empty())
 264         ::WinSetWindowText((HWND)GetHwnd(), (PSZ)title.c_str());
 265
 266     if ( bShow )
 267     {
 268         // dialogs don't get WM_SIZE message after creation unlike most (all?)
 269         // other windows and so could start their life not laid out correctly
 270         // if we didn't call Layout() from here
 271         //
 272         // NB: normally we should call it just the first time but doing it
 273         //     every time is simpler than keeping a flag
 274         Layout();
 275     }
 276
 277     return true;
 278 } // end of wxDialog::Show
 279
 280 //
 281 // Replacement for Show(true) for modal dialogs - returns return code
 282 //
 283 int wxDialog::ShowModal()
 284 {
 285     wxASSERT_MSG( !IsModal(), _T("wxDialog::ShowModal() reentered?") );
 286
 287     m_endModalCalled = false;
 288
 289     Show();
 290
 291     // EndModal may have been called from InitDialog handler (called from
 292     // inside Show()), which would cause an infinite loop if we didn't take it
 293     // into account
 294     if ( !m_endModalCalled )
 295     {
 296         // modal dialog needs a parent window, so try to find one
 297         wxWindow *parent = GetParent();
 298         if ( !parent )
 299         {
 300             parent = FindSuitableParent();
 301         }
 302
 303         // remember where the focus was
 304         wxWindow *oldFocus = m_pOldFocus;
 305         if ( !oldFocus )
 306         {
 307             // VZ: do we really want to do this?
 308             oldFocus = parent;
 309         }
 310
 311         // We have to remember the HWND because we need to check
 312         // the HWND still exists (oldFocus can be garbage when the dialog
 313         // exits, if it has been destroyed)
 314         HWND hwndOldFocus = oldFocus ? GetHwndOf(oldFocus) : NULL;
 315
 316
 317         //
 318         // Before entering the modal loop, reset the "is in OnIdle()" flag (see
 319         // comment in app.cpp)
 320         //
 321         extern bool                     gbInOnIdle;
 322         bool                            bWasInOnIdle = gbInOnIdle;
 323
 324         gbInOnIdle = false;
 325
 326         // enter and run the modal loop
 327         {
 328             wxDialogModalDataTiedPtr modalData(&m_modalData,
 329                                                new wxDialogModalData(this));
 330             modalData->RunLoop();
 331         }
 332         gbInOnIdle = bWasInOnIdle;
 333
 334         // and restore focus
 335         // Note that this code MUST NOT access the dialog object's data
 336         // in case the object has been deleted (which will be the case
 337         // for a modal dialog that has been destroyed before calling EndModal).
 338         if ( oldFocus && (oldFocus != this) && ::WinIsWindow(vHabmain, hwndOldFocus))
 339         {
 340             // This is likely to prove that the object still exists
 341             if (wxFindWinFromHandle((WXHWND) hwndOldFocus) == oldFocus)
 342                 oldFocus->SetFocus();
 343         }
 344     }
 345
 346     return GetReturnCode();
 347 } // end of wxDialog::ShowModal
 348
 349 void wxDialog::EndModal(
 350   int                               nRetCode
 351 )
 352 {
 353     wxASSERT_MSG( IsModal(), _T("EndModal() called for non modal dialog") );
 354
 355     m_endModalCalled = true;
 356     SetReturnCode(nRetCode);
 357
 358     Hide();
 359 } // end of wxDialog::EndModal
 360
 361 void wxDialog::EndDialog(int rc)
 362 {
 363     if ( IsModal() )
 364         EndModal(rc);
 365     else
 366         Hide();
 367 }
 368
 369 // ----------------------------------------------------------------------------
 370 // wxWin event handlers
 371 // ----------------------------------------------------------------------------
 372
 373 void wxDialog::OnApply( wxCommandEvent& WXUNUSED(rEvent) )
 374 {
 375     if (Validate())
 376         TransferDataFromWindow();
 377 } // end of wxDialog::OnApply
 378
 379 // Standard buttons
 380 void wxDialog::OnOK( wxCommandEvent& WXUNUSED(rEvent) )
 381 {
 382     if ( Validate() && TransferDataFromWindow() )
 383     {
 384         EndDialog(wxID_OK);
 385     }
 386 } // end of wxDialog::OnOK
 387
 388 void wxDialog::OnCancel( wxCommandEvent& WXUNUSED(rEvent) )
 389 {
 390     EndDialog(wxID_CANCEL);
 391 } // end of wxDialog::OnCancel
 392
 393 void wxDialog::OnCloseWindow( wxCloseEvent& WXUNUSED(rEvent) )
 394 {
 395     //
 396     // We'll send a Cancel message by default, which may close the dialog.
 397     // Check for looping if the Cancel event handler calls Close().
 398     //
 399     // Note that if a cancel button and handler aren't present in the dialog,
 400     // nothing will happen when you close the dialog via the window manager, or
 401     // via Close().
 402     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 403     // created on the stack.
 404     // However, this does mean that calling dialog->Close() won't delete the dialog
 405     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 406     // sure to destroy the dialog.
 407     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 408     //
 409
 410     //
 411     // Ugh???  This is not good but until I figure out a global list it'll have to do
 412     //
 413     static wxList closing;
 414
 415     if ( closing.Member(this) )
 416         return;
 417
 418     closing.Append(this);
 419
 420     wxCommandEvent vCancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 421
 422     vCancelEvent.SetEventObject( this );
 423     GetEventHandler()->ProcessEvent(vCancelEvent); // This may close the dialog
 424
 425     closing.DeleteObject(this);
 426 } // end of wxDialog::OnCloseWindow
 427
 428 void wxDialog::OnSysColourChanged( wxSysColourChangedEvent& WXUNUSED(rEvent) )
 429 {
 430     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 431     Refresh();
 432 } // end of wxDialog::OnSysColourChanged
 433
 434 MRESULT wxDialog::OS2WindowProc( WXUINT uMessage, WXWPARAM wParam, WXLPARAM lParam )
 435 {
 436     MRESULT  rc = 0;
 437     bool     bProcessed = false;
 438
 439     switch (uMessage)
 440     {
 441         case WM_CLOSE:
 442             //
 443             // If we can't close, tell the system that we processed the
 444             // message - otherwise it would close us
 445             //
 446             bProcessed = !Close();
 447             break;
 448     }
 449
 450     if (!bProcessed)
 451         rc = wxWindow::OS2WindowProc( uMessage
 452                                      ,wParam
 453                                      ,lParam
 454                                     );
 455     return rc;
 456 } // end of wxDialog::OS2WindowProc