src/motif/choice.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        choice.cpp
   3 // Purpose:     wxChoice
   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 #ifdef __GNUG__
  13 #pragma implementation "choice.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/choice.h"
  18 #include "wx/utils.h"
  19
  20 #ifdef __VMS__
  21 #pragma message disable nosimpint
  22 #endif
  23 #include <Xm/Xm.h>
  24 #include <Xm/PushBG.h>
  25 #include <Xm/PushB.h>
  26 #include <Xm/RowColumn.h>
  27 #ifdef __VMS__
  28 #pragma message enable nosimpint
  29 #endif
  30
  31 #include "wx/motif/private.h"
  32
  33 IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
  34
  35 void wxChoiceCallback (Widget w, XtPointer clientData,
  36                        XtPointer ptr);
  37
  38 wxChoice::wxChoice()
  39 {
  40     m_noStrings = 0;
  41     m_buttonWidget = (WXWidget) 0;
  42     m_menuWidget = (WXWidget) 0;
  43     m_widgetList = (WXWidget*) 0;
  44     m_formWidget = (WXWidget) 0;
  45 }
  46
  47 bool wxChoice::Create(wxWindow *parent, wxWindowID id,
  48                       const wxPoint& pos,
  49                       const wxSize& size,
  50                       int n, const wxString choices[],
  51                       long style,
  52                       const wxValidator& validator,
  53                       const wxString& name)
  54 {
  55     SetName(name);
  56     SetValidator(validator);
  57     m_noStrings = 0; // Starts off with none, incremented in Append
  58     m_windowStyle = style;
  59     m_buttonWidget = (WXWidget) 0;
  60     m_menuWidget = (WXWidget) 0;
  61     m_widgetList = (WXWidget*) 0;
  62     m_formWidget = (WXWidget) 0;
  63
  64     if (parent) parent->AddChild(this);
  65
  66     if ( id == -1 )
  67         m_windowId = (int)NewControlId();
  68     else
  69         m_windowId = id;
  70
  71     m_backgroundColour = parent->GetBackgroundColour();
  72     m_foregroundColour = parent->GetForegroundColour();
  73     m_font = parent->GetFont();
  74
  75     Widget parentWidget = (Widget) parent->GetClientWidget();
  76
  77     m_formWidget = (WXWidget) XtVaCreateManagedWidget(name.c_str(),
  78         xmRowColumnWidgetClass, parentWidget,
  79         XmNmarginHeight, 0,
  80         XmNmarginWidth, 0,
  81         XmNpacking, XmPACK_TIGHT,
  82         XmNorientation, XmHORIZONTAL,
  83         NULL);
  84
  85     XtVaSetValues ((Widget) m_formWidget, XmNspacing, 0, NULL);
  86
  87     /*
  88     * Create the popup menu
  89     */
  90     m_menuWidget = (WXWidget) XmCreatePulldownMenu ((Widget) m_formWidget, "choiceMenu", NULL, 0);
  91
  92     //    int i;
  93     if (n > 0)
  94     {
  95         int i;
  96         for (i = 0; i < n; i++)
  97             Append (choices[i]);
  98     }
  99
 100     /*
 101     * Create button
 102     */
 103     Arg args[10];
 104     Cardinal argcnt = 0;
 105
 106     XtSetArg (args[argcnt], XmNsubMenuId, (Widget) m_menuWidget);
 107     argcnt++;
 108     XtSetArg (args[argcnt], XmNmarginWidth, 0);
 109     argcnt++;
 110     XtSetArg (args[argcnt], XmNmarginHeight, 0);
 111     argcnt++;
 112     XtSetArg (args[argcnt], XmNpacking, XmPACK_TIGHT);
 113     argcnt++;
 114     m_buttonWidget = (WXWidget) XmCreateOptionMenu ((Widget) m_formWidget, "choiceButton", args, argcnt);
 115
 116     m_mainWidget = m_buttonWidget;
 117
 118     XtManageChild ((Widget) m_buttonWidget);
 119
 120     // New code from Roland Haenel (roland_haenel@ac.cybercity.de)
 121     // Some time ago, I reported a problem with wxChoice-items under
 122     // Linux and Motif 2.0 (they caused sporadic GPFs). Now it seems
 123     // that I have found the code responsible for this behaviour.
 124 #if XmVersion >= 1002
 125 #if XmVersion <  2000
 126     // JACS, 24/1/99: this seems to cause a malloc crash later on, e.g.
 127     // in controls sample.
 128     //
 129     // Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
 130     // XtUnmanageChild (optionLabel);
 131 #endif
 132 #endif
 133
 134     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 135
 136     ChangeFont(FALSE);
 137
 138     AttachWidget (parent, m_buttonWidget, m_formWidget, pos.x, pos.y, size.x, size.y);
 139
 140     ChangeBackgroundColour();
 141
 142     return TRUE;
 143 }
 144
 145 wxChoice::~wxChoice()
 146 {
 147     // For some reason destroying the menuWidget
 148     // can cause crashes on some machines. It will
 149     // be deleted implicitly by deleting the parent form
 150     // anyway.
 151     //  XtDestroyWidget (menuWidget);
 152     if (m_widgetList)
 153         delete[] m_widgetList;
 154
 155     if (GetMainWidget())
 156     {
 157         DetachWidget(GetMainWidget()); // Removes event handlers
 158         DetachWidget(m_formWidget);
 159
 160         XtDestroyWidget((Widget) m_formWidget);
 161         m_formWidget = (WXWidget) 0;
 162
 163         // Presumably the other widgets have been deleted now, via the form
 164         m_mainWidget = (WXWidget) 0;
 165         m_buttonWidget = (WXWidget) 0;
 166     }
 167 }
 168
 169 void wxChoice::Append(const wxString& item)
 170 {
 171     Widget w = XtVaCreateManagedWidget (wxStripMenuCodes(item),
 172 #if USE_GADGETS
 173         xmPushButtonGadgetClass, (Widget) m_menuWidget,
 174 #else
 175         xmPushButtonWidgetClass, (Widget) m_menuWidget,
 176 #endif
 177         NULL);
 178
 179     DoChangeBackgroundColour((WXWidget) w, m_backgroundColour);
 180
 181     if (m_font.Ok())
 182         XtVaSetValues (w,
 183         XmNfontList, (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_formWidget)),
 184         NULL);
 185
 186     WXWidget *new_widgetList = new WXWidget[m_noStrings + 1];
 187     int i;
 188     if (m_widgetList)
 189         for (i = 0; i < m_noStrings; i++)
 190             new_widgetList[i] = m_widgetList[i];
 191
 192         new_widgetList[m_noStrings] = (WXWidget) w;
 193
 194         if (m_widgetList)
 195             delete[] m_widgetList;
 196         m_widgetList = new_widgetList;
 197
 198         char mnem = wxFindMnemonic ((char*) (const char*) item);
 199         if (mnem != 0)
 200             XtVaSetValues (w, XmNmnemonic, mnem, NULL);
 201
 202         XtAddCallback (w, XmNactivateCallback, (XtCallbackProc) wxChoiceCallback, (XtPointer) this);
 203
 204         if (m_noStrings == 0 && m_buttonWidget)
 205         {
 206             XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, w, NULL);
 207             Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 208             XmString text = XmStringCreateSimple ((char*) (const char*) item);
 209             XtVaSetValues (label,
 210                 XmNlabelString, text,
 211                 NULL);
 212             XmStringFree (text);
 213         }
 214         wxNode *node = m_stringList.Add (item);
 215         XtVaSetValues (w, XmNuserData, node->Data (), NULL);
 216
 217         m_noStrings ++;
 218 }
 219
 220 void wxChoice::Delete(int WXUNUSED(n))
 221 {
 222     wxFAIL_MSG( "Sorry, wxChoice::Delete isn't implemented yet. Maybe you'd like to volunteer? :-)" );
 223
 224     // What should we do -- remove the callback for this button widget,
 225     // delete the m_stringList entry, delete the button widget, construct a new widget list
 226     // (see Append)
 227
 228     // TODO
 229     m_noStrings --;
 230 }
 231
 232 void wxChoice::Clear()
 233 {
 234     m_stringList.Clear ();
 235     int i;
 236     for (i = 0; i < m_noStrings; i++)
 237     {
 238         XtUnmanageChild ((Widget) m_widgetList[i]);
 239         XtDestroyWidget ((Widget) m_widgetList[i]);
 240     }
 241     if (m_noStrings)
 242         delete[] m_widgetList;
 243     m_widgetList = (WXWidget*) NULL;
 244     if (m_buttonWidget)
 245         XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, (Widget) NULL, NULL);
 246     m_noStrings = 0;
 247 }
 248
 249 int wxChoice::GetSelection() const
 250 {
 251     XmString text;
 252     char *s;
 253     Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 254     XtVaGetValues (label,
 255         XmNlabelString, &text,
 256         NULL);
 257
 258     if (XmStringGetLtoR (text, XmSTRING_DEFAULT_CHARSET, &s))
 259     {
 260         int i = 0;
 261         for (wxNode * node = m_stringList.First (); node; node = node->Next ())
 262         {
 263             char *s1 = (char *) node->Data ();
 264             if (s1 == s || strcmp (s1, s) == 0)
 265             {
 266                 XmStringFree(text) ;
 267                 XtFree (s);
 268                 return i;
 269             }
 270             else
 271                 i++;
 272         }            // for()
 273
 274         XmStringFree(text) ;
 275         XtFree (s);
 276         return -1;
 277     }
 278     XmStringFree(text) ;
 279     return -1;
 280 }
 281
 282 void wxChoice::SetSelection(int n)
 283 {
 284     m_inSetValue = TRUE;
 285
 286     wxNode *node = m_stringList.Nth (n);
 287     if (node)
 288     {
 289         Dimension selectionWidth, selectionHeight;
 290
 291         char *s = (char *) node->Data ();
 292         XmString text = XmStringCreateSimple (s);
 293         XtVaGetValues ((Widget) m_widgetList[n], XmNwidth, &selectionWidth, XmNheight, &selectionHeight, NULL);
 294         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 295         XtVaSetValues (label,
 296             XmNlabelString, text,
 297             NULL);
 298         XmStringFree (text);
 299         XtVaSetValues ((Widget) m_buttonWidget,
 300             XmNwidth, selectionWidth, XmNheight, selectionHeight,
 301             XmNmenuHistory, (Widget) m_widgetList[n], NULL);
 302     }
 303     m_inSetValue = FALSE;
 304 }
 305
 306 int wxChoice::FindString(const wxString& s) const
 307 {
 308     int i = 0;
 309     for (wxNode * node = m_stringList.First (); node; node = node->Next ())
 310     {
 311         char *s1 = (char *) node->Data ();
 312         if (s == s1)
 313         {
 314             return i;
 315         }
 316         else
 317             i++;
 318     }
 319     return -1;
 320 }
 321
 322 wxString wxChoice::GetString(int n) const
 323 {
 324     wxNode *node = m_stringList.Nth (n);
 325     if (node)
 326         return wxString((char *) node->Data ());
 327     else
 328         return wxEmptyString;
 329 }
 330
 331 void wxChoice::SetColumns(int n)
 332 {
 333     if (n<1) n = 1 ;
 334
 335     short numColumns = n ;
 336     Arg args[3];
 337
 338     XtSetArg(args[0], XmNnumColumns, numColumns);
 339     XtSetArg(args[1], XmNpacking, XmPACK_COLUMN);
 340     XtSetValues((Widget) m_menuWidget,args,2) ;
 341 }
 342
 343 int wxChoice::GetColumns(void) const
 344 {
 345     short numColumns ;
 346
 347     XtVaGetValues((Widget) m_menuWidget,XmNnumColumns,&numColumns,NULL) ;
 348     return numColumns ;
 349 }
 350
 351 void wxChoice::SetFocus()
 352 {
 353     XmProcessTraversal(XtParent((Widget)m_mainWidget), XmTRAVERSE_CURRENT);
 354 }
 355
 356 void wxChoice::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 357 {
 358     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 359     bool managed = XtIsManaged((Widget) m_formWidget);
 360
 361     if (managed)
 362         XtUnmanageChild ((Widget) m_formWidget);
 363
 364     int actualWidth = width, actualHeight = height;
 365
 366     if (width > -1)
 367     {
 368         int i;
 369         for (i = 0; i < m_noStrings; i++)
 370             XtVaSetValues ((Widget) m_widgetList[i], XmNwidth, actualWidth, NULL);
 371         XtVaSetValues ((Widget) m_buttonWidget, XmNwidth, actualWidth,
 372             NULL);
 373     }
 374     if (height > -1)
 375     {
 376         int i;
 377         for (i = 0; i < m_noStrings; i++)
 378             XtVaSetValues ((Widget) m_widgetList[i], XmNheight, actualHeight, NULL);
 379         XtVaSetValues ((Widget) m_buttonWidget, XmNheight, actualHeight,
 380             NULL);
 381     }
 382
 383     if (managed)
 384         XtManageChild ((Widget) m_formWidget);
 385     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 386
 387     wxControl::DoSetSize (x, y, width, height, sizeFlags);
 388 }
 389
 390 wxString wxChoice::GetStringSelection () const
 391 {
 392     int sel = GetSelection ();
 393     if (sel > -1)
 394         return wxString(this->GetString (sel));
 395     else
 396         return wxEmptyString;
 397 }
 398
 399 bool wxChoice::SetStringSelection (const wxString& s)
 400 {
 401     int sel = FindString (s);
 402     if (sel > -1)
 403     {
 404         SetSelection (sel);
 405         return TRUE;
 406     }
 407     else
 408         return FALSE;
 409 }
 410
 411 void wxChoice::Command(wxCommandEvent & event)
 412 {
 413     SetSelection (event.GetInt());
 414     ProcessCommand (event);
 415 }
 416
 417 void wxChoiceCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 418 {
 419     wxChoice *item = (wxChoice *) clientData;
 420     if (item)
 421     {
 422         if (item->InSetValue())
 423             return;
 424
 425         char *s = NULL;
 426         XtVaGetValues (w, XmNuserData, &s, NULL);
 427         if (s)
 428         {
 429             wxCommandEvent event (wxEVT_COMMAND_CHOICE_SELECTED, item->GetId());
 430             event.SetEventObject(item);
 431             event.m_commandInt = item->FindString (s);
 432             //            event.m_commandString = s;
 433             item->ProcessCommand (event);
 434         }
 435     }
 436 }
 437
 438 void wxChoice::ChangeFont(bool keepOriginalSize)
 439 {
 440     // Note that this causes the widget to be resized back
 441     // to its original size! We therefore have to set the size
 442     // back again. TODO: a better way in Motif?
 443     if (m_font.Ok())
 444     {
 445         int width, height, width1, height1;
 446         GetSize(& width, & height);
 447
 448         XmFontList fontList = (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_mainWidget));
 449         XtVaSetValues ((Widget) m_mainWidget, XmNfontList, fontList, NULL);
 450         XtVaSetValues ((Widget) m_buttonWidget, XmNfontList, fontList, NULL);
 451
 452         /* TODO: why does this cause a crash in XtWidgetToApplicationContext?
 453         int i;
 454         for (i = 0; i < m_noStrings; i++)
 455         XtVaSetValues ((Widget) m_widgetList[i], XmNfontList, fontList, NULL);
 456         */
 457         GetSize(& width1, & height1);
 458         if (keepOriginalSize && (width != width1 || height != height1))
 459         {
 460             SetSize(-1, -1, width, height);
 461         }
 462     }
 463 }
 464
 465 void wxChoice::ChangeBackgroundColour()
 466 {
 467     DoChangeBackgroundColour(m_formWidget, m_backgroundColour);
 468     DoChangeBackgroundColour(m_buttonWidget, m_backgroundColour);
 469     DoChangeBackgroundColour(m_menuWidget, m_backgroundColour);
 470     int i;
 471     for (i = 0; i < m_noStrings; i++)
 472         DoChangeBackgroundColour(m_widgetList[i], m_backgroundColour);
 473 }
 474
 475 void wxChoice::ChangeForegroundColour()
 476 {
 477     DoChangeForegroundColour(m_formWidget, m_foregroundColour);
 478     DoChangeForegroundColour(m_buttonWidget, m_foregroundColour);
 479     DoChangeForegroundColour(m_menuWidget, m_foregroundColour);
 480     int i;
 481     for (i = 0; i < m_noStrings; i++)
 482         DoChangeForegroundColour(m_widgetList[i], m_foregroundColour);
 483 }
 484
 485
 486 // These implement functions needed by wxControlWithItems.
 487 // Unfortunately, they're not all implemented yet.
 488
 489 int wxChoice::GetCount() const
 490 {
 491     return Number();
 492 }
 493
 494 int wxChoice::DoAppend(const wxString& item)
 495 {
 496     Append(item);
 497     return GetCount() - 1;
 498 }
 499
 500 // Just appends, doesn't yet insert
 501 void wxChoice::DoInsertItems(const wxArrayString& items, int WXUNUSED(pos))
 502 {
 503     size_t nItems = items.GetCount();
 504
 505     for ( size_t n = 0; n < nItems; n++ )
 506     {
 507         Append( items[n]);
 508     }
 509 }
 510
 511 void wxChoice::DoSetItems(const wxArrayString& items, void **WXUNUSED(clientData))
 512 {
 513     Clear();
 514     size_t nItems = items.GetCount();
 515
 516     for ( size_t n = 0; n < nItems; n++ )
 517     {
 518         Append(items[n]);
 519     }
 520 }
 521
 522 void wxChoice::DoSetFirstItem(int WXUNUSED(n))
 523 {
 524     wxFAIL_MSG( wxT("wxChoice::DoSetFirstItem not implemented") );
 525 }
 526
 527 void wxChoice::DoSetItemClientData(int WXUNUSED(n), void* WXUNUSED(clientData))
 528 {
 529     wxFAIL_MSG( wxT("wxChoice::DoSetItemClientData not implemented") );
 530 }
 531
 532 void* wxChoice::DoGetItemClientData(int WXUNUSED(n)) const
 533 {
 534     wxFAIL_MSG( wxT("wxChoice::DoGetItemClientData not implemented") );
 535     return (void*) NULL;
 536 }
 537
 538 void wxChoice::DoSetItemClientObject(int WXUNUSED(n), wxClientData* WXUNUSED(clientData))
 539 {
 540     wxFAIL_MSG( wxT("wxChoice::DoSetItemClientObject not implemented") );
 541 }
 542
 543 wxClientData* wxChoice::DoGetItemClientObject(int WXUNUSED(n)) const
 544 {
 545     wxFAIL_MSG( wxT("wxChoice::DoGetItemClientObject not implemented") );
 546     return (wxClientData*) NULL;
 547 }
 548
 549 void wxChoice::Select(int n)
 550 {
 551     SetSelection(n);
 552 }
 553
 554 void wxChoice::SetString(int WXUNUSED(n), const wxString& WXUNUSED(s))
 555 {
 556     wxFAIL_MSG( wxT("wxChoice::SetString not implemented") );
 557 }