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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "dialog.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __VMS
  20 #define XtDisplay XTDISPLAY
  21 #define XtWindow XTWINDOW
  22 #define XtParent XTPARENT
  23 #define XtScreen XTSCREEN
  24 #endif
  25
  26 #include "wx/dialog.h"
  27 #include "wx/utils.h"
  28 #include "wx/app.h"
  29 #include "wx/settings.h"
  30 #include "wx/evtloop.h"
  31
  32 #ifdef __VMS__
  33 #pragma message disable nosimpint
  34 #endif
  35 #include <Xm/Xm.h>
  36
  37 #include <X11/Shell.h>
  38 #if XmVersion >= 1002
  39 #include <Xm/XmAll.h>
  40 #endif
  41 #include <Xm/MwmUtil.h>
  42 #include <Xm/Label.h>
  43 #include <Xm/BulletinB.h>
  44 #include <Xm/Frame.h>
  45 #include <Xm/Text.h>
  46 #include <Xm/DialogS.h>
  47 #include <Xm/FileSB.h>
  48 #include <Xm/RowColumn.h>
  49 #include <Xm/LabelG.h>
  50 #include <Xm/AtomMgr.h>
  51 #if   XmVersion > 1000
  52 #include <Xm/Protocols.h>
  53 #endif
  54 #ifdef __VMS__
  55 #pragma message enable nosimpint
  56 #endif
  57
  58 #include "wx/motif/private.h"
  59
  60 // A stack of modal_showing flags, since we can't rely
  61 // on accessing wxDialog::m_modalShowing within
  62 // wxDialog::Show in case a callback has deleted the wxDialog.
  63 // static wxList wxModalShowingStack;
  64
  65 // Lists to keep track of windows, so we can disable/enable them
  66 // for modal dialogs
  67 wxList wxModalDialogs;
  68 extern wxList wxModelessWindows;  // Frames and modeless dialogs
  69 extern wxList wxPendingDelete;
  70
  71 #define wxUSE_INVISIBLE_RESIZE 1
  72
  73 IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxTopLevelWindow)
  74
  75 BEGIN_EVENT_TABLE(wxDialog, wxTopLevelWindow)
  76   EVT_BUTTON(wxID_OK, wxDialog::OnOK)
  77   EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
  78   EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
  79   EVT_CHAR_HOOK(wxDialog::OnCharHook)
  80   EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
  81   EVT_CLOSE(wxDialog::OnCloseWindow)
  82 END_EVENT_TABLE()
  83
  84
  85 wxDialog::wxDialog()
  86 {
  87     m_modalShowing = false;
  88     m_eventLoop = NULL;
  89     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
  90 }
  91
  92 bool wxDialog::Create(wxWindow *parent, wxWindowID id,
  93                       const wxString& title,
  94                       const wxPoint& pos,
  95                       const wxSize& size,
  96                       long style,
  97                       const wxString& name)
  98 {
  99     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
 100
 101     if( !wxTopLevelWindow::Create( parent, id, title, pos, size, style,
 102                                    name ) )
 103         return false;
 104
 105     m_modalShowing = false;
 106     m_eventLoop = NULL;
 107
 108     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 109     m_foregroundColour = *wxBLACK;
 110
 111     Widget dialogShell = (Widget) m_mainWidget;
 112     Widget shell = XtParent(dialogShell) ;
 113
 114     SetTitle( title );
 115
 116     m_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 117     ChangeFont(false);
 118
 119     // Can't remember what this was about... but I think it's necessary.
 120     if (wxUSE_INVISIBLE_RESIZE)
 121     {
 122         if (pos.x > -1)
 123             XtVaSetValues(dialogShell, XmNx, pos.x,
 124             NULL);
 125         if (pos.y > -1)
 126             XtVaSetValues(dialogShell, XmNy, pos.y,
 127             NULL);
 128
 129         if (size.x > -1)
 130             XtVaSetValues(dialogShell, XmNwidth, size.x, NULL);
 131         if (size.y > -1)
 132             XtVaSetValues(dialogShell, XmNheight, size.y, NULL);
 133     }
 134
 135     // Positioning of the dialog doesn't work properly unless the dialog
 136     // is managed, so we manage without mapping to the screen.
 137     // To show, we map the shell (actually it's parent).
 138     if (!wxUSE_INVISIBLE_RESIZE)
 139         XtVaSetValues(shell, XmNmappedWhenManaged, False, NULL);
 140
 141     if (!wxUSE_INVISIBLE_RESIZE)
 142     {
 143         XtManageChild(dialogShell);
 144         SetSize(pos.x, pos.y, size.x, size.y);
 145     }
 146     XtAddEventHandler(dialogShell,ExposureMask,False,
 147         wxUniversalRepaintProc, (XtPointer) this);
 148
 149     ChangeBackgroundColour();
 150
 151     return true;
 152 }
 153
 154 bool wxDialog::DoCreate(wxWindow* parent,
 155                              wxWindowID id,
 156                              const wxString& title,
 157                              const wxPoint& pos,
 158                              const wxSize& size,
 159                              long style,
 160                              const wxString& name)
 161 {
 162     Widget parentWidget = (Widget) 0;
 163     if( parent )
 164         parentWidget = (Widget) parent->GetTopWidget();
 165     if( !parent )
 166         parentWidget = (Widget) wxTheApp->GetTopLevelWidget();
 167
 168     wxASSERT_MSG( (parentWidget != (Widget) 0),
 169                   "Could not find a suitable parent shell for dialog." );
 170
 171     Arg args[2];
 172     XtSetArg (args[0], XmNdefaultPosition, False);
 173     XtSetArg (args[1], XmNautoUnmanage, False);
 174     Widget dialogShell =
 175         XmCreateBulletinBoardDialog( parentWidget,
 176                                      wxConstCast(name.c_str(), char),
 177                                      args, 2);
 178     m_mainWidget = (WXWidget) dialogShell;
 179
 180     // We don't want margins, since there is enough elsewhere.
 181     XtVaSetValues( dialogShell,
 182                    XmNmarginHeight,   0,
 183                    XmNmarginWidth,    0,
 184                    XmNresizePolicy, XmRESIZE_NONE,
 185                    NULL ) ;
 186
 187     XtTranslations ptr ;
 188     XtOverrideTranslations(dialogShell,
 189         ptr = XtParseTranslationTable("<Configure>: resize()"));
 190     XtFree((char *)ptr);
 191
 192     XtRealizeWidget(dialogShell);
 193
 194     wxAddWindowToTable( (Widget)m_mainWidget, this );
 195
 196     return true;
 197 }
 198
 199 void wxDialog::DoDestroy()
 200 {
 201 }
 202
 203 void wxDialog::SetModal(bool flag)
 204 {
 205 #ifdef __VMS
 206 #pragma message disable codcauunr
 207 #endif
 208    if ( flag )
 209         m_windowStyle |= wxDIALOG_MODAL ;
 210     else
 211         if ( m_windowStyle & wxDIALOG_MODAL )
 212             m_windowStyle -= wxDIALOG_MODAL ;
 213
 214         wxModelessWindows.DeleteObject(this);
 215         if (!flag)
 216             wxModelessWindows.Append(this);
 217 #ifdef __VMS
 218 #pragma message enable codcauunr
 219 #endif
 220 }
 221
 222 wxDialog::~wxDialog()
 223 {
 224     m_isBeingDeleted = true;
 225
 226     delete m_eventLoop;
 227
 228     if (m_mainWidget)
 229     {
 230         XtRemoveEventHandler((Widget) m_mainWidget, ExposureMask, False,
 231                              wxUniversalRepaintProc, (XtPointer) this);
 232     }
 233
 234     m_modalShowing = false;
 235     if (!wxUSE_INVISIBLE_RESIZE && m_mainWidget)
 236     {
 237         XtUnmapWidget((Widget) m_mainWidget);
 238     }
 239
 240     PreDestroy();
 241
 242     if ( m_mainWidget )
 243     {
 244         wxDeleteWindowFromTable( (Widget)m_mainWidget );
 245         XtDestroyWidget( (Widget)m_mainWidget );
 246     }
 247 }
 248
 249 // By default, pressing escape cancels the dialog
 250 void wxDialog::OnCharHook(wxKeyEvent& event)
 251 {
 252     if (event.m_keyCode == WXK_ESCAPE)
 253     {
 254         // Behaviour changed in 2.0: we'll send a Cancel message
 255         // to the dialog instead of Close.
 256         wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 257         cancelEvent.SetEventObject( this );
 258         GetEventHandler()->ProcessEvent(cancelEvent);
 259
 260         return;
 261     }
 262     // We didn't process this event.
 263     event.Skip();
 264 }
 265
 266 void wxDialog::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 267 {
 268     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 269     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
 270     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 271 }
 272
 273 void wxDialog::DoSetClientSize(int width, int height)
 274 {
 275     wxWindow::SetSize(-1, -1, width, height);
 276 }
 277
 278 void wxDialog::SetTitle(const wxString& title)
 279 {
 280     wxTopLevelWindow::SetTitle( title );
 281
 282     if( !title.empty() )
 283     {
 284         wxXmString str( title );
 285         XtVaSetValues( (Widget)m_mainWidget,
 286                        XmNtitle, title.c_str(),
 287                        XmNdialogTitle, str(), // Roberto Cocchi
 288                        XmNiconName, title.c_str(),
 289                        NULL );
 290     }
 291 }
 292
 293 bool wxDialog::Show( bool show )
 294 {
 295     if( !wxWindowBase::Show( show ) )
 296         return false;
 297
 298     m_isShown = show;
 299
 300     if (show)
 301     {
 302         // this usually will result in TransferDataToWindow() being called
 303         // which will change the controls values so do it before showing as
 304         // otherwise we could have some flicker
 305         InitDialog();
 306     }
 307
 308     if (show)
 309     {
 310         if (!wxUSE_INVISIBLE_RESIZE)
 311             XtMapWidget(XtParent((Widget) m_mainWidget));
 312         else
 313             XtManageChild((Widget)m_mainWidget) ;
 314
 315         XRaiseWindow( XtDisplay( (Widget)m_mainWidget ),
 316                       XtWindow( (Widget)m_mainWidget) );
 317
 318     }
 319     else
 320     {
 321         if (!wxUSE_INVISIBLE_RESIZE)
 322             XtUnmapWidget(XtParent((Widget) m_mainWidget));
 323         else
 324             XtUnmanageChild((Widget)m_mainWidget) ;
 325
 326         XFlush(XtDisplay((Widget)m_mainWidget));
 327         XSync(XtDisplay((Widget)m_mainWidget), False);
 328     }
 329
 330     return true;
 331 }
 332
 333 // Shows a dialog modally, returning a return code
 334 int wxDialog::ShowModal()
 335 {
 336     m_windowStyle |= wxDIALOG_MODAL;
 337
 338     Show(true);
 339
 340     // after the event loop ran, the widget might already have been destroyed
 341     WXDisplay* display = (WXDisplay*)XtDisplay( (Widget)m_mainWidget );
 342
 343     if (m_modalShowing)
 344         return 0;
 345     m_eventLoop = new wxEventLoop;
 346
 347     m_modalShowing = true;
 348     XtAddGrab((Widget) m_mainWidget, True, False);
 349
 350     m_eventLoop->Run();
 351
 352     // Now process all events in case they get sent to a destroyed dialog
 353     wxFlushEvents( display );
 354
 355     delete m_eventLoop;
 356     m_eventLoop = NULL;
 357
 358     // TODO: is it safe to call this, if the dialog may have been deleted
 359     // by now? Probably only if we're using delayed deletion of dialogs.
 360     return GetReturnCode();
 361 }
 362
 363 void wxDialog::EndModal(int retCode)
 364 {
 365     if (!m_modalShowing)
 366         return;
 367
 368     SetReturnCode(retCode);
 369
 370     // Strangely, we don't seem to need this now.
 371     //    XtRemoveGrab((Widget) m_mainWidget);
 372
 373     Show(false);
 374
 375     m_modalShowing = false;
 376     m_eventLoop->Exit();
 377
 378     SetModal(false);
 379 }
 380
 381 // Standard buttons
 382 void wxDialog::OnOK(wxCommandEvent& WXUNUSED(event))
 383 {
 384     if ( Validate() && TransferDataFromWindow() )
 385     {
 386         if ( IsModal() )
 387             EndModal(wxID_OK);
 388         else
 389         {
 390             SetReturnCode(wxID_OK);
 391             this->Show(false);
 392         }
 393     }
 394 }
 395
 396 void wxDialog::OnApply(wxCommandEvent& WXUNUSED(event))
 397 {
 398     if (Validate())
 399         TransferDataFromWindow();
 400     // TODO probably need to disable the Apply button until things change again
 401 }
 402
 403 void wxDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
 404 {
 405     if ( IsModal() )
 406         EndModal(wxID_CANCEL);
 407     else
 408     {
 409         SetReturnCode(wxID_CANCEL);
 410         this->Show(false);
 411     }
 412 }
 413
 414 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 415 {
 416     // We'll send a Cancel message by default,
 417     // which may close the dialog.
 418     // Check for looping if the Cancel event handler calls Close().
 419
 420     // Note that if a cancel button and handler aren't present in the dialog,
 421     // nothing will happen when you close the dialog via the window manager, or
 422     // via Close().
 423     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 424     // created on the stack.
 425     // However, this does mean that calling dialog->Close() won't delete the dialog
 426     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 427     // sure to destroy the dialog.
 428     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 429
 430     static wxList closing;
 431
 432     if ( closing.Member(this) )
 433         return;
 434
 435     closing.Append(this);
 436
 437     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 438     cancelEvent.SetEventObject( this );
 439     GetEventHandler()->ProcessEvent(cancelEvent); // This may close the dialog
 440
 441     closing.DeleteObject(this);
 442 }
 443
 444 // Destroy the window (delayed, if a managed window)
 445 bool wxDialog::Destroy()
 446 {
 447     if (!wxPendingDelete.Member(this))
 448         wxPendingDelete.Append(this);
 449     return true;
 450 }
 451
 452 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
 453 {
 454     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 455     Refresh();
 456 }
 457
 458 void wxDialog::ChangeFont(bool keepOriginalSize)
 459 {
 460     wxWindow::ChangeFont(keepOriginalSize);
 461 }
 462
 463 void wxDialog::ChangeBackgroundColour()
 464 {
 465     if (GetMainWidget())
 466         wxDoChangeBackgroundColour(GetMainWidget(), m_backgroundColour);
 467 }
 468
 469 void wxDialog::ChangeForegroundColour()
 470 {
 471     if (GetMainWidget())
 472         wxDoChangeForegroundColour(GetMainWidget(), m_foregroundColour);
 473 }