src/motif/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dialog.cpp
   3 // Purpose:     wxDialog class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __VMS
  16 #define XtDisplay XTDISPLAY
  17 #define XtWindow XTWINDOW
  18 #define XtParent XTPARENT
  19 #define XtScreen XTSCREEN
  20 #endif
  21
  22 #include "wx/dialog.h"
  23 #include "wx/utils.h"
  24 #include "wx/app.h"
  25 #include "wx/settings.h"
  26 #include "wx/evtloop.h"
  27
  28 #ifdef __VMS__
  29 #pragma message disable nosimpint
  30 #endif
  31 #include <Xm/Xm.h>
  32
  33 #include <X11/Shell.h>
  34 #if XmVersion >= 1002
  35 #include <Xm/XmAll.h>
  36 #endif
  37 #include <Xm/MwmUtil.h>
  38 #include <Xm/Label.h>
  39 #include <Xm/BulletinB.h>
  40 #include <Xm/Frame.h>
  41 #include <Xm/Text.h>
  42 #include <Xm/DialogS.h>
  43 #include <Xm/FileSB.h>
  44 #include <Xm/RowColumn.h>
  45 #include <Xm/LabelG.h>
  46 #include <Xm/AtomMgr.h>
  47 #if   XmVersion > 1000
  48 #include <Xm/Protocols.h>
  49 #endif
  50 #ifdef __VMS__
  51 #pragma message enable nosimpint
  52 #endif
  53
  54 #include "wx/motif/private.h"
  55
  56 // A stack of modal_showing flags, since we can't rely
  57 // on accessing wxDialog::m_modalShowing within
  58 // wxDialog::Show in case a callback has deleted the wxDialog.
  59 // static wxList wxModalShowingStack;
  60
  61 // Lists to keep track of windows, so we can disable/enable them
  62 // for modal dialogs
  63 wxList wxModalDialogs;
  64 extern wxList wxModelessWindows;  // Frames and modeless dialogs
  65 extern wxList wxPendingDelete;
  66
  67 #define wxUSE_INVISIBLE_RESIZE 1
  68
  69 IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxTopLevelWindow)
  70
  71 BEGIN_EVENT_TABLE(wxDialog, wxTopLevelWindow)
  72   EVT_BUTTON(wxID_OK, wxDialog::OnOK)
  73   EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
  74   EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
  75   EVT_CHAR_HOOK(wxDialog::OnCharHook)
  76   EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
  77   EVT_CLOSE(wxDialog::OnCloseWindow)
  78 END_EVENT_TABLE()
  79
  80
  81 wxDialog::wxDialog()
  82 {
  83     m_modalShowing = false;
  84     m_eventLoop = NULL;
  85     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
  86 }
  87
  88 bool wxDialog::Create(wxWindow *parent, wxWindowID id,
  89                       const wxString& title,
  90                       const wxPoint& pos,
  91                       const wxSize& size,
  92                       long style,
  93                       const wxString& name)
  94 {
  95     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
  96
  97     if( !wxTopLevelWindow::Create( parent, id, title, pos, size, style,
  98                                    name ) )
  99         return false;
 100
 101     m_modalShowing = false;
 102     m_eventLoop = NULL;
 103
 104     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 105     m_foregroundColour = *wxBLACK;
 106
 107     Widget dialogShell = (Widget) m_mainWidget;
 108     Widget shell = XtParent(dialogShell) ;
 109
 110     SetTitle( title );
 111
 112     m_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 113     ChangeFont(false);
 114
 115     // Can't remember what this was about... but I think it's necessary.
 116     if (wxUSE_INVISIBLE_RESIZE)
 117     {
 118         if (pos.x > -1)
 119             XtVaSetValues(dialogShell, XmNx, pos.x,
 120             NULL);
 121         if (pos.y > -1)
 122             XtVaSetValues(dialogShell, XmNy, pos.y,
 123             NULL);
 124
 125         if (size.x > -1)
 126             XtVaSetValues(dialogShell, XmNwidth, size.x, NULL);
 127         if (size.y > -1)
 128             XtVaSetValues(dialogShell, XmNheight, size.y, NULL);
 129     }
 130
 131     // Positioning of the dialog doesn't work properly unless the dialog
 132     // is managed, so we manage without mapping to the screen.
 133     // To show, we map the shell (actually it's parent).
 134     if (!wxUSE_INVISIBLE_RESIZE)
 135         XtVaSetValues(shell, XmNmappedWhenManaged, False, NULL);
 136
 137     if (!wxUSE_INVISIBLE_RESIZE)
 138     {
 139         XtManageChild(dialogShell);
 140         SetSize(pos.x, pos.y, size.x, size.y);
 141     }
 142     XtAddEventHandler(dialogShell,ExposureMask,False,
 143         wxUniversalRepaintProc, (XtPointer) this);
 144
 145     ChangeBackgroundColour();
 146
 147     return true;
 148 }
 149
 150 bool wxDialog::DoCreate(wxWindow* parent,
 151                              wxWindowID id,
 152                              const wxString& title,
 153                              const wxPoint& pos,
 154                              const wxSize& size,
 155                              long style,
 156                              const wxString& name)
 157 {
 158     Widget parentWidget = (Widget) 0;
 159     if( parent )
 160         parentWidget = (Widget) parent->GetTopWidget();
 161     if( !parent )
 162         parentWidget = (Widget) wxTheApp->GetTopLevelWidget();
 163
 164     wxASSERT_MSG( (parentWidget != (Widget) 0),
 165                   "Could not find a suitable parent shell for dialog." );
 166
 167     Arg args[2];
 168     XtSetArg (args[0], XmNdefaultPosition, False);
 169     XtSetArg (args[1], XmNautoUnmanage, False);
 170     Widget dialogShell =
 171         XmCreateBulletinBoardDialog( parentWidget,
 172                                      wxConstCast(name.c_str(), char),
 173                                      args, 2);
 174     m_mainWidget = (WXWidget) dialogShell;
 175
 176     // We don't want margins, since there is enough elsewhere.
 177     XtVaSetValues( dialogShell,
 178                    XmNmarginHeight,   0,
 179                    XmNmarginWidth,    0,
 180                    XmNresizePolicy, XmRESIZE_NONE,
 181                    NULL ) ;
 182
 183     XtTranslations ptr ;
 184     XtOverrideTranslations(dialogShell,
 185         ptr = XtParseTranslationTable("<Configure>: resize()"));
 186     XtFree((char *)ptr);
 187
 188     XtRealizeWidget(dialogShell);
 189
 190     wxAddWindowToTable( (Widget)m_mainWidget, this );
 191
 192     return true;
 193 }
 194
 195 void wxDialog::DoDestroy()
 196 {
 197 }
 198
 199 void wxDialog::SetModal(bool flag)
 200 {
 201 #ifdef __VMS
 202 #pragma message disable codcauunr
 203 #endif
 204    if ( flag )
 205         m_windowStyle |= wxDIALOG_MODAL ;
 206     else
 207         if ( m_windowStyle & wxDIALOG_MODAL )
 208             m_windowStyle -= wxDIALOG_MODAL ;
 209
 210         wxModelessWindows.DeleteObject(this);
 211         if (!flag)
 212             wxModelessWindows.Append(this);
 213 #ifdef __VMS
 214 #pragma message enable codcauunr
 215 #endif
 216 }
 217
 218 wxDialog::~wxDialog()
 219 {
 220     m_isBeingDeleted = true;
 221
 222     delete m_eventLoop;
 223
 224     if (m_mainWidget)
 225     {
 226         XtRemoveEventHandler((Widget) m_mainWidget, ExposureMask, False,
 227                              wxUniversalRepaintProc, (XtPointer) this);
 228     }
 229
 230     m_modalShowing = false;
 231     if (!wxUSE_INVISIBLE_RESIZE && m_mainWidget)
 232     {
 233         XtUnmapWidget((Widget) m_mainWidget);
 234     }
 235
 236     PreDestroy();
 237
 238     if ( m_mainWidget )
 239     {
 240         wxDeleteWindowFromTable( (Widget)m_mainWidget );
 241         XtDestroyWidget( (Widget)m_mainWidget );
 242     }
 243 }
 244
 245 // By default, pressing escape cancels the dialog
 246 void wxDialog::OnCharHook(wxKeyEvent& event)
 247 {
 248     if (event.m_keyCode == WXK_ESCAPE)
 249     {
 250         // Behaviour changed in 2.0: we'll send a Cancel message
 251         // to the dialog instead of Close.
 252         wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 253         cancelEvent.SetEventObject( this );
 254         GetEventHandler()->ProcessEvent(cancelEvent);
 255
 256         return;
 257     }
 258     // We didn't process this event.
 259     event.Skip();
 260 }
 261
 262 void wxDialog::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 263 {
 264     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 265     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
 266     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 267 }
 268
 269 void wxDialog::DoSetClientSize(int width, int height)
 270 {
 271     wxWindow::SetSize(-1, -1, width, height);
 272 }
 273
 274 void wxDialog::SetTitle(const wxString& title)
 275 {
 276     wxTopLevelWindow::SetTitle( title );
 277
 278     if( !title.empty() )
 279     {
 280         wxXmString str( title );
 281         XtVaSetValues( (Widget)m_mainWidget,
 282                        XmNtitle, title.c_str(),
 283                        XmNdialogTitle, str(), // Roberto Cocchi
 284                        XmNiconName, title.c_str(),
 285                        NULL );
 286     }
 287 }
 288
 289 bool wxDialog::Show( bool show )
 290 {
 291     if( !wxWindowBase::Show( show ) )
 292         return false;
 293
 294     m_isShown = show;
 295
 296     if (show)
 297     {
 298         // this usually will result in TransferDataToWindow() being called
 299         // which will change the controls values so do it before showing as
 300         // otherwise we could have some flicker
 301         InitDialog();
 302     }
 303
 304     if (show)
 305     {
 306         if (!wxUSE_INVISIBLE_RESIZE)
 307             XtMapWidget(XtParent((Widget) m_mainWidget));
 308         else
 309             XtManageChild((Widget)m_mainWidget) ;
 310
 311         XRaiseWindow( XtDisplay( (Widget)m_mainWidget ),
 312                       XtWindow( (Widget)m_mainWidget) );
 313
 314     }
 315     else
 316     {
 317         if (!wxUSE_INVISIBLE_RESIZE)
 318             XtUnmapWidget(XtParent((Widget) m_mainWidget));
 319         else
 320             XtUnmanageChild((Widget)m_mainWidget) ;
 321
 322         XFlush(XtDisplay((Widget)m_mainWidget));
 323         XSync(XtDisplay((Widget)m_mainWidget), False);
 324     }
 325
 326     return true;
 327 }
 328
 329 // Shows a dialog modally, returning a return code
 330 int wxDialog::ShowModal()
 331 {
 332     m_windowStyle |= wxDIALOG_MODAL;
 333
 334     Show(true);
 335
 336     // after the event loop ran, the widget might already have been destroyed
 337     WXDisplay* display = (WXDisplay*)XtDisplay( (Widget)m_mainWidget );
 338
 339     if (m_modalShowing)
 340         return 0;
 341     m_eventLoop = new wxEventLoop;
 342
 343     m_modalShowing = true;
 344     XtAddGrab((Widget) m_mainWidget, True, False);
 345
 346     m_eventLoop->Run();
 347
 348     // Now process all events in case they get sent to a destroyed dialog
 349     wxFlushEvents( display );
 350
 351     delete m_eventLoop;
 352     m_eventLoop = NULL;
 353
 354     // TODO: is it safe to call this, if the dialog may have been deleted
 355     // by now? Probably only if we're using delayed deletion of dialogs.
 356     return GetReturnCode();
 357 }
 358
 359 void wxDialog::EndModal(int retCode)
 360 {
 361     if (!m_modalShowing)
 362         return;
 363
 364     SetReturnCode(retCode);
 365
 366     // Strangely, we don't seem to need this now.
 367     //    XtRemoveGrab((Widget) m_mainWidget);
 368
 369     Show(false);
 370
 371     m_modalShowing = false;
 372     m_eventLoop->Exit();
 373
 374     SetModal(false);
 375 }
 376
 377 // Standard buttons
 378 void wxDialog::OnOK(wxCommandEvent& WXUNUSED(event))
 379 {
 380     if ( Validate() && TransferDataFromWindow() )
 381     {
 382         if ( IsModal() )
 383             EndModal(wxID_OK);
 384         else
 385         {
 386             SetReturnCode(wxID_OK);
 387             this->Show(false);
 388         }
 389     }
 390 }
 391
 392 void wxDialog::OnApply(wxCommandEvent& WXUNUSED(event))
 393 {
 394     if (Validate())
 395         TransferDataFromWindow();
 396     // TODO probably need to disable the Apply button until things change again
 397 }
 398
 399 void wxDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
 400 {
 401     if ( IsModal() )
 402         EndModal(wxID_CANCEL);
 403     else
 404     {
 405         SetReturnCode(wxID_CANCEL);
 406         this->Show(false);
 407     }
 408 }
 409
 410 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 411 {
 412     // We'll send a Cancel message by default,
 413     // which may close the dialog.
 414     // Check for looping if the Cancel event handler calls Close().
 415
 416     // Note that if a cancel button and handler aren't present in the dialog,
 417     // nothing will happen when you close the dialog via the window manager, or
 418     // via Close().
 419     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 420     // created on the stack.
 421     // However, this does mean that calling dialog->Close() won't delete the dialog
 422     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 423     // sure to destroy the dialog.
 424     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 425
 426     static wxList closing;
 427
 428     if ( closing.Member(this) )
 429         return;
 430
 431     closing.Append(this);
 432
 433     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 434     cancelEvent.SetEventObject( this );
 435     GetEventHandler()->ProcessEvent(cancelEvent); // This may close the dialog
 436
 437     closing.DeleteObject(this);
 438 }
 439
 440 // Destroy the window (delayed, if a managed window)
 441 bool wxDialog::Destroy()
 442 {
 443     if (!wxPendingDelete.Member(this))
 444         wxPendingDelete.Append(this);
 445     return true;
 446 }
 447
 448 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
 449 {
 450     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 451     Refresh();
 452 }
 453
 454 void wxDialog::ChangeFont(bool keepOriginalSize)
 455 {
 456     wxWindow::ChangeFont(keepOriginalSize);
 457 }
 458
 459 void wxDialog::ChangeBackgroundColour()
 460 {
 461     if (GetMainWidget())
 462         wxDoChangeBackgroundColour(GetMainWidget(), m_backgroundColour);
 463 }
 464
 465 void wxDialog::ChangeForegroundColour()
 466 {
 467     if (GetMainWidget())
 468         wxDoChangeForegroundColour(GetMainWidget(), m_foregroundColour);
 469 }