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
 109     SetTitle( title );
 110
 111     m_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 112     ChangeFont(false);
 113
 114     // Can't remember what this was about... but I think it's necessary.
 115 #if wxUSE_INVISIBLE_RESIZE
 116     if (pos.x > -1)
 117         XtVaSetValues(dialogShell, XmNx, pos.x,
 118         NULL);
 119     if (pos.y > -1)
 120         XtVaSetValues(dialogShell, XmNy, pos.y,
 121         NULL);
 122
 123     if (size.x > -1)
 124         XtVaSetValues(dialogShell, XmNwidth, size.x, NULL);
 125     if (size.y > -1)
 126         XtVaSetValues(dialogShell, XmNheight, size.y, NULL);
 127 #endif
 128
 129     // Positioning of the dialog doesn't work properly unless the dialog
 130     // is managed, so we manage without mapping to the screen.
 131     // To show, we map the shell (actually it's parent).
 132 #if !wxUSE_INVISIBLE_RESIZE
 133     Widget shell = XtParent(dialogShell) ;
 134     XtVaSetValues(shell, XmNmappedWhenManaged, False, NULL);
 135 #endif
 136
 137 #if !wxUSE_INVISIBLE_RESIZE
 138     XtManageChild(dialogShell);
 139     SetSize(pos.x, pos.y, size.x, size.y);
 140 #endif
 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 WXUNUSED(id),
 152                              const wxString& WXUNUSED(title),
 153                              const wxPoint& WXUNUSED(pos),
 154                              const wxSize& WXUNUSED(size),
 155                              long WXUNUSED(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    if ( flag )
 198        wxModelessWindows.DeleteObject(this);
 199    else
 200        wxModelessWindows.Append(this);
 201 }
 202
 203 wxDialog::~wxDialog()
 204 {
 205     m_isBeingDeleted = true;
 206
 207     delete m_eventLoop;
 208
 209     if (m_mainWidget)
 210     {
 211         XtRemoveEventHandler((Widget) m_mainWidget, ExposureMask, False,
 212                              wxUniversalRepaintProc, (XtPointer) this);
 213     }
 214
 215     m_modalShowing = false;
 216
 217 #if !wxUSE_INVISIBLE_RESIZE
 218     if (m_mainWidget)
 219     {
 220         XtUnmapWidget((Widget) m_mainWidget);
 221     }
 222 #endif
 223
 224     PreDestroy();
 225
 226     if ( m_mainWidget )
 227     {
 228         wxDeleteWindowFromTable( (Widget)m_mainWidget );
 229         XtDestroyWidget( (Widget)m_mainWidget );
 230     }
 231 }
 232
 233 // By default, pressing escape cancels the dialog
 234 void wxDialog::OnCharHook(wxKeyEvent& event)
 235 {
 236     if (event.m_keyCode == WXK_ESCAPE)
 237     {
 238         // Behaviour changed in 2.0: we'll send a Cancel message
 239         // to the dialog instead of Close.
 240         wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 241         cancelEvent.SetEventObject( this );
 242         GetEventHandler()->ProcessEvent(cancelEvent);
 243
 244         return;
 245     }
 246     // We didn't process this event.
 247     event.Skip();
 248 }
 249
 250 void wxDialog::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 251 {
 252     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 253     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
 254     XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 255 }
 256
 257 void wxDialog::DoSetClientSize(int width, int height)
 258 {
 259     wxWindow::SetSize(-1, -1, width, height);
 260 }
 261
 262 void wxDialog::SetTitle(const wxString& title)
 263 {
 264     wxTopLevelWindow::SetTitle( title );
 265
 266     if( !title.empty() )
 267     {
 268         wxXmString str( title );
 269         XtVaSetValues( (Widget)m_mainWidget,
 270                        XmNtitle, title.c_str(),
 271                        XmNdialogTitle, str(), // Roberto Cocchi
 272                        XmNiconName, title.c_str(),
 273                        NULL );
 274     }
 275 }
 276
 277 bool wxDialog::Show( bool show )
 278 {
 279     if( !wxWindowBase::Show( show ) )
 280         return false;
 281
 282     m_isShown = show;
 283
 284     if (show)
 285     {
 286         // this usually will result in TransferDataToWindow() being called
 287         // which will change the controls values so do it before showing as
 288         // otherwise we could have some flicker
 289         InitDialog();
 290     }
 291
 292     if (show)
 293     {
 294 #if !wxUSE_INVISIBLE_RESIZE
 295         XtMapWidget(XtParent((Widget) m_mainWidget));
 296 #else
 297         XtManageChild((Widget)m_mainWidget) ;
 298 #endif
 299
 300         XRaiseWindow( XtDisplay( (Widget)m_mainWidget ),
 301                       XtWindow( (Widget)m_mainWidget) );
 302
 303     }
 304     else
 305     {
 306 #if !wxUSE_INVISIBLE_RESIZE
 307         XtUnmapWidget(XtParent((Widget) m_mainWidget));
 308 #else
 309         XtUnmanageChild((Widget)m_mainWidget) ;
 310 #endif
 311
 312         XFlush(XtDisplay((Widget)m_mainWidget));
 313         XSync(XtDisplay((Widget)m_mainWidget), False);
 314     }
 315
 316     return true;
 317 }
 318
 319 // Shows a dialog modally, returning a return code
 320 int wxDialog::ShowModal()
 321 {
 322     m_windowStyle |= wxDIALOG_MODAL;
 323
 324     Show(true);
 325
 326     // after the event loop ran, the widget might already have been destroyed
 327     WXDisplay* display = (WXDisplay*)XtDisplay( (Widget)m_mainWidget );
 328
 329     if (m_modalShowing)
 330         return 0;
 331     m_eventLoop = new wxEventLoop;
 332
 333     m_modalShowing = true;
 334     XtAddGrab((Widget) m_mainWidget, True, False);
 335
 336     m_eventLoop->Run();
 337
 338     // Now process all events in case they get sent to a destroyed dialog
 339     wxFlushEvents( display );
 340
 341     delete m_eventLoop;
 342     m_eventLoop = NULL;
 343
 344     // TODO: is it safe to call this, if the dialog may have been deleted
 345     // by now? Probably only if we're using delayed deletion of dialogs.
 346     return GetReturnCode();
 347 }
 348
 349 void wxDialog::EndModal(int retCode)
 350 {
 351     if (!m_modalShowing)
 352         return;
 353
 354     SetReturnCode(retCode);
 355
 356     // Strangely, we don't seem to need this now.
 357     //    XtRemoveGrab((Widget) m_mainWidget);
 358
 359     Show(false);
 360
 361     m_modalShowing = false;
 362     m_eventLoop->Exit();
 363
 364     SetModal(false);
 365 }
 366
 367 // Standard buttons
 368 void wxDialog::OnOK(wxCommandEvent& WXUNUSED(event))
 369 {
 370     if ( Validate() && TransferDataFromWindow() )
 371     {
 372         if ( IsModal() )
 373             EndModal(wxID_OK);
 374         else
 375         {
 376             SetReturnCode(wxID_OK);
 377             this->Show(false);
 378         }
 379     }
 380 }
 381
 382 void wxDialog::OnApply(wxCommandEvent& WXUNUSED(event))
 383 {
 384     if (Validate())
 385         TransferDataFromWindow();
 386     // TODO probably need to disable the Apply button until things change again
 387 }
 388
 389 void wxDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
 390 {
 391     if ( IsModal() )
 392         EndModal(wxID_CANCEL);
 393     else
 394     {
 395         SetReturnCode(wxID_CANCEL);
 396         this->Show(false);
 397     }
 398 }
 399
 400 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 401 {
 402     // We'll send a Cancel message by default,
 403     // which may close the dialog.
 404     // Check for looping if the Cancel event handler calls Close().
 405
 406     // Note that if a cancel button and handler aren't present in the dialog,
 407     // nothing will happen when you close the dialog via the window manager, or
 408     // via Close().
 409     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 410     // created on the stack.
 411     // However, this does mean that calling dialog->Close() won't delete the dialog
 412     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 413     // sure to destroy the dialog.
 414     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 415
 416     static wxList closing;
 417
 418     if ( closing.Member(this) )
 419         return;
 420
 421     closing.Append(this);
 422
 423     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 424     cancelEvent.SetEventObject( this );
 425     GetEventHandler()->ProcessEvent(cancelEvent); // This may close the dialog
 426
 427     closing.DeleteObject(this);
 428 }
 429
 430 // Destroy the window (delayed, if a managed window)
 431 bool wxDialog::Destroy()
 432 {
 433     if (!wxPendingDelete.Member(this))
 434         wxPendingDelete.Append(this);
 435     return true;
 436 }
 437
 438 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
 439 {
 440     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 441     Refresh();
 442 }
 443
 444 void wxDialog::ChangeFont(bool keepOriginalSize)
 445 {
 446     wxWindow::ChangeFont(keepOriginalSize);
 447 }
 448
 449 void wxDialog::ChangeBackgroundColour()
 450 {
 451     if (GetMainWidget())
 452         wxDoChangeBackgroundColour(GetMainWidget(), m_backgroundColour);
 453 }
 454
 455 void wxDialog::ChangeForegroundColour()
 456 {
 457     if (GetMainWidget())
 458         wxDoChangeForegroundColour(GetMainWidget(), m_foregroundColour);
 459 }