src/motif/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/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::XmDoCreateTLW(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::SetModal(bool flag)
 196 {
 197 #ifdef __VMS
 198 #pragma message disable codcauunr
 199 #endif
 200    if ( flag )
 201         m_windowStyle |= wxDIALOG_MODAL ;
 202     else
 203         if ( m_windowStyle & wxDIALOG_MODAL )
 204             m_windowStyle -= wxDIALOG_MODAL ;
 205
 206         wxModelessWindows.DeleteObject(this);
 207         if (!flag)
 208             wxModelessWindows.Append(this);
 209 #ifdef __VMS
 210 #pragma message enable codcauunr
 211 #endif
 212 }
 213
 214 wxDialog::~wxDialog()
 215 {
 216     m_isBeingDeleted = true;
 217
 218     delete m_eventLoop;
 219
 220     if (m_mainWidget)
 221     {
 222         XtRemoveEventHandler((Widget) m_mainWidget, ExposureMask, False,
 223                              wxUniversalRepaintProc, (XtPointer) this);
 224     }
 225
 226     m_modalShowing = false;
 227     if (!wxUSE_INVISIBLE_RESIZE && m_mainWidget)
 228     {
 229         XtUnmapWidget((Widget) m_mainWidget);
 230     }
 231
 232     PreDestroy();
 233
 234     if ( m_mainWidget )
 235     {
 236         wxDeleteWindowFromTable( (Widget)m_mainWidget );
 237         XtDestroyWidget( (Widget)m_mainWidget );
 238     }
 239 }
 240
 241 // By default, pressing escape cancels the dialog
 242 void wxDialog::OnCharHook(wxKeyEvent& event)
 243 {
 244     if (event.m_keyCode == WXK_ESCAPE)
 245     {
 246         // Behaviour changed in 2.0: we'll send a Cancel message
 247         // to the dialog instead of Close.
 248         wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 249         cancelEvent.SetEventObject( this );
 250         GetEventHandler()->ProcessEvent(cancelEvent);
 251
 252         return;
 253     }
 254     // We didn't process this event.
 255     event.Skip();
 256 }
 257
 258 void wxDialog::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 259 {
 260     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 261     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
 262     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 263 }
 264
 265 void wxDialog::DoSetClientSize(int width, int height)
 266 {
 267     wxWindow::SetSize(-1, -1, width, height);
 268 }
 269
 270 void wxDialog::SetTitle(const wxString& title)
 271 {
 272     wxTopLevelWindow::SetTitle( title );
 273
 274     if( !title.empty() )
 275     {
 276         wxXmString str( title );
 277         XtVaSetValues( (Widget)m_mainWidget,
 278                        XmNtitle, title.c_str(),
 279                        XmNdialogTitle, str(), // Roberto Cocchi
 280                        XmNiconName, title.c_str(),
 281                        NULL );
 282     }
 283 }
 284
 285 bool wxDialog::Show( bool show )
 286 {
 287     if( !wxWindowBase::Show( show ) )
 288         return false;
 289
 290     m_isShown = show;
 291
 292     if (show)
 293     {
 294         // this usually will result in TransferDataToWindow() being called
 295         // which will change the controls values so do it before showing as
 296         // otherwise we could have some flicker
 297         InitDialog();
 298     }
 299
 300     if (show)
 301     {
 302         if (!wxUSE_INVISIBLE_RESIZE)
 303             XtMapWidget(XtParent((Widget) m_mainWidget));
 304         else
 305             XtManageChild((Widget)m_mainWidget) ;
 306
 307         XRaiseWindow( XtDisplay( (Widget)m_mainWidget ),
 308                       XtWindow( (Widget)m_mainWidget) );
 309
 310     }
 311     else
 312     {
 313         if (!wxUSE_INVISIBLE_RESIZE)
 314             XtUnmapWidget(XtParent((Widget) m_mainWidget));
 315         else
 316             XtUnmanageChild((Widget)m_mainWidget) ;
 317
 318         XFlush(XtDisplay((Widget)m_mainWidget));
 319         XSync(XtDisplay((Widget)m_mainWidget), False);
 320     }
 321
 322     return true;
 323 }
 324
 325 // Shows a dialog modally, returning a return code
 326 int wxDialog::ShowModal()
 327 {
 328     m_windowStyle |= wxDIALOG_MODAL;
 329
 330     Show(true);
 331
 332     // after the event loop ran, the widget might already have been destroyed
 333     WXDisplay* display = (WXDisplay*)XtDisplay( (Widget)m_mainWidget );
 334
 335     if (m_modalShowing)
 336         return 0;
 337     m_eventLoop = new wxEventLoop;
 338
 339     m_modalShowing = true;
 340     XtAddGrab((Widget) m_mainWidget, True, False);
 341
 342     m_eventLoop->Run();
 343
 344     // Now process all events in case they get sent to a destroyed dialog
 345     wxFlushEvents( display );
 346
 347     delete m_eventLoop;
 348     m_eventLoop = NULL;
 349
 350     // TODO: is it safe to call this, if the dialog may have been deleted
 351     // by now? Probably only if we're using delayed deletion of dialogs.
 352     return GetReturnCode();
 353 }
 354
 355 void wxDialog::EndModal(int retCode)
 356 {
 357     if (!m_modalShowing)
 358         return;
 359
 360     SetReturnCode(retCode);
 361
 362     // Strangely, we don't seem to need this now.
 363     //    XtRemoveGrab((Widget) m_mainWidget);
 364
 365     Show(false);
 366
 367     m_modalShowing = false;
 368     m_eventLoop->Exit();
 369
 370     SetModal(false);
 371 }
 372
 373 // Standard buttons
 374 void wxDialog::OnOK(wxCommandEvent& WXUNUSED(event))
 375 {
 376     if ( Validate() && TransferDataFromWindow() )
 377     {
 378         if ( IsModal() )
 379             EndModal(wxID_OK);
 380         else
 381         {
 382             SetReturnCode(wxID_OK);
 383             this->Show(false);
 384         }
 385     }
 386 }
 387
 388 void wxDialog::OnApply(wxCommandEvent& WXUNUSED(event))
 389 {
 390     if (Validate())
 391         TransferDataFromWindow();
 392     // TODO probably need to disable the Apply button until things change again
 393 }
 394
 395 void wxDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
 396 {
 397     if ( IsModal() )
 398         EndModal(wxID_CANCEL);
 399     else
 400     {
 401         SetReturnCode(wxID_CANCEL);
 402         this->Show(false);
 403     }
 404 }
 405
 406 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 407 {
 408     // We'll send a Cancel message by default,
 409     // which may close the dialog.
 410     // Check for looping if the Cancel event handler calls Close().
 411
 412     // Note that if a cancel button and handler aren't present in the dialog,
 413     // nothing will happen when you close the dialog via the window manager, or
 414     // via Close().
 415     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 416     // created on the stack.
 417     // However, this does mean that calling dialog->Close() won't delete the dialog
 418     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 419     // sure to destroy the dialog.
 420     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 421
 422     static wxList closing;
 423
 424     if ( closing.Member(this) )
 425         return;
 426
 427     closing.Append(this);
 428
 429     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 430     cancelEvent.SetEventObject( this );
 431     GetEventHandler()->ProcessEvent(cancelEvent); // This may close the dialog
 432
 433     closing.DeleteObject(this);
 434 }
 435
 436 // Destroy the window (delayed, if a managed window)
 437 bool wxDialog::Destroy()
 438 {
 439     if (!wxPendingDelete.Member(this))
 440         wxPendingDelete.Append(this);
 441     return true;
 442 }
 443
 444 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
 445 {
 446     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 447     Refresh();
 448 }
 449
 450 void wxDialog::ChangeFont(bool keepOriginalSize)
 451 {
 452     wxWindow::ChangeFont(keepOriginalSize);
 453 }
 454
 455 void wxDialog::ChangeBackgroundColour()
 456 {
 457     if (GetMainWidget())
 458         wxDoChangeBackgroundColour(GetMainWidget(), m_backgroundColour);
 459 }
 460
 461 void wxDialog::ChangeForegroundColour()
 462 {
 463     if (GetMainWidget())
 464         wxDoChangeForegroundColour(GetMainWidget(), m_foregroundColour);
 465 }