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/scopedptr.h"
  29 #include "wx/modalhook.h"
  30
  31 #define wxDIALOG_DEFAULT_X 300
  32 #define wxDIALOG_DEFAULT_Y 300
  33
  34 #define wxDIALOG_DEFAULT_WIDTH 500
  35 #define wxDIALOG_DEFAULT_HEIGHT 500
  36
  37
  38 // ----------------------------------------------------------------------------
  39 // wxDialogModalData
  40 // ----------------------------------------------------------------------------
  41
  42 // this is simply a container for any data we need to implement modality which
  43 // allows us to avoid changing wxDialog each time the implementation changes
  44 class wxDialogModalData
  45 {
  46 public:
  47     wxDialogModalData(wxDialog *dialog) : m_evtLoop(dialog) { }
  48
  49     void RunLoop()
  50     {
  51         m_evtLoop.Run();
  52     }
  53
  54     void ExitLoop()
  55     {
  56         m_evtLoop.Exit();
  57     }
  58
  59 private:
  60     wxModalEventLoop m_evtLoop;
  61 };
  62
  63 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxDialogModalData);
  64
  65 // ============================================================================
  66 // implementation
  67 // ============================================================================
  68
  69 // ----------------------------------------------------------------------------
  70 // wxDialog construction
  71 // ----------------------------------------------------------------------------
  72
  73 void wxDialog::Init()
  74 {
  75     m_pOldFocus = NULL;
  76     m_isShown = false;
  77     m_pWindowDisabler = NULL;
  78     m_modalData = NULL;
  79     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
  80 } // end of wxDialog::Init
  81
  82 bool wxDialog::Create( wxWindow*       pParent,
  83                        wxWindowID      vId,
  84                        const wxString& rsTitle,
  85                        const wxPoint&  rPos,
  86                        const wxSize&   rSize,
  87                        long            lStyle,
  88                        const wxString& rsName )
  89 {
  90     Init();
  91     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
  92
  93     //
  94     // Save focus before doing anything which can potentially change it
  95     //
  96     m_pOldFocus = FindFocus();
  97
  98     //
  99     // All dialogs should really have this style
 100     //
 101     lStyle |= wxTAB_TRAVERSAL;
 102
 103     if (!wxTopLevelWindow::Create( pParent
 104                                   ,vId
 105                                   ,rsTitle
 106                                   ,rPos
 107                                   ,rSize
 108                                   ,lStyle
 109                                   ,rsName
 110                                  ))
 111         return false;
 112
 113     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 114
 115     //
 116     // Must defer setting the title until after dialog is created and sized
 117     //
 118     if ( !rsTitle.empty() )
 119         SetTitle(rsTitle);
 120     return true;
 121 } // end of wxDialog::Create
 122
 123 #if WXWIN_COMPATIBILITY_2_6
 124
 125 // deprecated ctor
 126 wxDialog::wxDialog(wxWindow *parent,
 127                    const wxString& title,
 128                    bool WXUNUSED(modal),
 129                    int x,
 130                    int y,
 131                    int w,
 132                    int h,
 133                    long style,
 134                    const wxString& name)
 135 {
 136     Init();
 137
 138     Create(parent, wxID_ANY, title, wxPoint(x, y), wxSize(w, h), style, name);
 139 }
 140
 141 void wxDialog::SetModal(bool WXUNUSED(bFlag))
 142 {
 143     // nothing to do, obsolete method
 144 } // end of wxDialog::SetModal
 145
 146 #endif // WXWIN_COMPATIBILITY_2_6
 147
 148 wxDialog::~wxDialog()
 149 {
 150     SendDestroyEvent();
 151
 152     // this will also reenable all the other windows for a modal dialog
 153     Show(false);
 154 } // end of wxDialog::~wxDialog
 155
 156 // ----------------------------------------------------------------------------
 157 // showing the dialogs
 158 // ----------------------------------------------------------------------------
 159
 160 #if WXWIN_COMPATIBILITY_2_6
 161
 162 bool wxDialog::IsModalShowing() const
 163 {
 164     return IsModal();
 165 } // end of wxDialog::IsModalShowing
 166
 167 #endif // WXWIN_COMPATIBILITY_2_6
 168
 169 bool wxDialog::Show( bool bShow )
 170 {
 171     if ( bShow == IsShown() )
 172         return false;
 173
 174     if (!bShow && m_modalData )
 175     {
 176         // we need to do this before calling wxDialogBase version because if we
 177         // had disabled other app windows, they must be reenabled right now as
 178         // if they stay disabled Windows will activate another window (one
 179         // which is enabled, anyhow) when we're hidden in the base class Show()
 180         // and we will lose activation
 181         m_modalData->ExitLoop();
 182 #if 0
 183         wxDELETE(m_pWindowDisabler);
 184 #endif
 185     }
 186
 187     if (bShow)
 188     {
 189         if (CanDoLayoutAdaptation())
 190             DoLayoutAdaptation();
 191
 192         // this usually will result in TransferDataToWindow() being called
 193         // which will change the controls values so do it before showing as
 194         // otherwise we could have some flicker
 195         InitDialog();
 196     }
 197
 198     wxDialogBase::Show(bShow);
 199
 200     wxString title = GetTitle();
 201     if (!title.empty())
 202         ::WinSetWindowText((HWND)GetHwnd(), title.c_str());
 203
 204     if ( bShow )
 205     {
 206         // dialogs don't get WM_SIZE message after creation unlike most (all?)
 207         // other windows and so could start their life not laid out correctly
 208         // if we didn't call Layout() from here
 209         //
 210         // NB: normally we should call it just the first time but doing it
 211         //     every time is simpler than keeping a flag
 212         Layout();
 213     }
 214
 215     return true;
 216 } // end of wxDialog::Show
 217
 218 //
 219 // Replacement for Show(true) for modal dialogs - returns return code
 220 //
 221 int wxDialog::ShowModal()
 222 {
 223     WX_HOOK_MODAL_DIALOG();
 224
 225     wxASSERT_MSG( !IsModal(), wxT("wxDialog::ShowModal() reentered?") );
 226
 227     m_endModalCalled = false;
 228
 229     Show();
 230
 231     // EndModal may have been called from InitDialog handler (called from
 232     // inside Show()), which would cause an infinite loop if we didn't take it
 233     // into account
 234     if ( !m_endModalCalled )
 235     {
 236         // modal dialog needs a parent window, so try to find one
 237         wxWindow * const parent = GetParentForModalDialog();
 238
 239         // remember where the focus was
 240         wxWindow *oldFocus = m_pOldFocus;
 241         if ( !oldFocus )
 242         {
 243             // VZ: do we really want to do this?
 244             oldFocus = parent;
 245         }
 246
 247         // We have to remember the HWND because we need to check
 248         // the HWND still exists (oldFocus can be garbage when the dialog
 249         // exits, if it has been destroyed)
 250         HWND hwndOldFocus = oldFocus ? GetHwndOf(oldFocus) : NULL;
 251
 252
 253         //
 254         // Before entering the modal loop, reset the "is in OnIdle()" flag (see
 255         // comment in app.cpp)
 256         //
 257         extern bool                     gbInOnIdle;
 258         bool                            bWasInOnIdle = gbInOnIdle;
 259
 260         gbInOnIdle = false;
 261
 262         // enter and run the modal loop
 263         {
 264             wxDialogModalDataTiedPtr modalData(&m_modalData,
 265                                                new wxDialogModalData(this));
 266             modalData->RunLoop();
 267         }
 268         gbInOnIdle = bWasInOnIdle;
 269
 270         // and restore focus
 271         // Note that this code MUST NOT access the dialog object's data
 272         // in case the object has been deleted (which will be the case
 273         // for a modal dialog that has been destroyed before calling EndModal).
 274         if ( oldFocus && (oldFocus != this) && ::WinIsWindow(vHabmain, hwndOldFocus))
 275         {
 276             // This is likely to prove that the object still exists
 277             if (wxFindWinFromHandle((WXHWND) hwndOldFocus) == oldFocus)
 278                 oldFocus->SetFocus();
 279         }
 280     }
 281
 282     return GetReturnCode();
 283 } // end of wxDialog::ShowModal
 284
 285 void wxDialog::EndModal(
 286   int                               nRetCode
 287 )
 288 {
 289     wxASSERT_MSG( IsModal(), wxT("EndModal() called for non modal dialog") );
 290
 291     m_endModalCalled = true;
 292     SetReturnCode(nRetCode);
 293
 294     Hide();
 295 } // end of wxDialog::EndModal
 296
 297 MRESULT wxDialog::OS2WindowProc( WXUINT uMessage, WXWPARAM wParam, WXLPARAM lParam )
 298 {
 299     MRESULT  rc = 0;
 300     bool     bProcessed = false;
 301
 302     switch (uMessage)
 303     {
 304         case WM_CLOSE:
 305             //
 306             // If we can't close, tell the system that we processed the
 307             // message - otherwise it would close us
 308             //
 309             bProcessed = !Close();
 310             break;
 311     }
 312
 313     if (!bProcessed)
 314         rc = wxWindow::OS2WindowProc( uMessage
 315                                      ,wParam
 316                                      ,lParam
 317                                     );
 318     return rc;
 319 } // end of wxDialog::OS2WindowProc