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 #ifdef __VMS
  17 #define XtDisplay XTDISPLAY
  18 #define XtParent XTPARENT
  19 #endif
  20
  21 #include "wx/defs.h"
  22
  23 #include "wx/choice.h"
  24 #include "wx/utils.h"
  25
  26 #ifdef __VMS__
  27 #pragma message disable nosimpint
  28 #endif
  29 #include <Xm/Xm.h>
  30 #include <Xm/PushBG.h>
  31 #include <Xm/PushB.h>
  32 #include <Xm/RowColumn.h>
  33 #ifdef __VMS__
  34 #pragma message enable nosimpint
  35 #endif
  36
  37 #include "wx/motif/private.h"
  38
  39 IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
  40
  41 void wxChoiceCallback (Widget w, XtPointer clientData,
  42                        XtPointer ptr);
  43
  44 wxChoice::wxChoice()
  45 {
  46     m_noStrings = 0;
  47     m_buttonWidget = (WXWidget) 0;
  48     m_menuWidget = (WXWidget) 0;
  49     m_widgetList = (WXWidget*) 0;
  50     m_formWidget = (WXWidget) 0;
  51 }
  52
  53 bool wxChoice::Create(wxWindow *parent, wxWindowID id,
  54                       const wxPoint& pos,
  55                       const wxSize& size,
  56                       int n, const wxString choices[],
  57                       long style,
  58                       const wxValidator& validator,
  59                       const wxString& name)
  60 {
  61     SetName(name);
  62     SetValidator(validator);
  63     m_noStrings = 0; // Starts off with none, incremented in Append
  64     m_windowStyle = style;
  65     m_buttonWidget = (WXWidget) 0;
  66     m_menuWidget = (WXWidget) 0;
  67     m_widgetList = (WXWidget*) 0;
  68     m_formWidget = (WXWidget) 0;
  69
  70     if (parent) parent->AddChild(this);
  71
  72     if ( id == -1 )
  73         m_windowId = (int)NewControlId();
  74     else
  75         m_windowId = id;
  76
  77     m_backgroundColour = parent->GetBackgroundColour();
  78     m_foregroundColour = parent->GetForegroundColour();
  79     m_font = parent->GetFont();
  80
  81     Widget parentWidget = (Widget) parent->GetClientWidget();
  82
  83     m_formWidget = (WXWidget) XtVaCreateManagedWidget(name.c_str(),
  84         xmRowColumnWidgetClass, parentWidget,
  85         XmNmarginHeight, 0,
  86         XmNmarginWidth, 0,
  87         XmNpacking, XmPACK_TIGHT,
  88         XmNorientation, XmHORIZONTAL,
  89         NULL);
  90
  91     XtVaSetValues ((Widget) m_formWidget, XmNspacing, 0, NULL);
  92
  93     /*
  94     * Create the popup menu
  95     */
  96     m_menuWidget = (WXWidget) XmCreatePulldownMenu ((Widget) m_formWidget, "choiceMenu", NULL, 0);
  97
  98     //    int i;
  99     if (n > 0)
 100     {
 101         int i;
 102         for (i = 0; i < n; i++)
 103             Append (choices[i]);
 104     }
 105
 106     /*
 107     * Create button
 108     */
 109     Arg args[10];
 110     Cardinal argcnt = 0;
 111
 112     XtSetArg (args[argcnt], XmNsubMenuId, (Widget) m_menuWidget);
 113     argcnt++;
 114     XtSetArg (args[argcnt], XmNmarginWidth, 0);
 115     argcnt++;
 116     XtSetArg (args[argcnt], XmNmarginHeight, 0);
 117     argcnt++;
 118     XtSetArg (args[argcnt], XmNpacking, XmPACK_TIGHT);
 119     argcnt++;
 120     m_buttonWidget = (WXWidget) XmCreateOptionMenu ((Widget) m_formWidget, "choiceButton", args, argcnt);
 121
 122     m_mainWidget = m_buttonWidget;
 123
 124     XtManageChild ((Widget) m_buttonWidget);
 125
 126     // New code from Roland Haenel (roland_haenel@ac.cybercity.de)
 127     // Some time ago, I reported a problem with wxChoice-items under
 128     // Linux and Motif 2.0 (they caused sporadic GPFs). Now it seems
 129     // that I have found the code responsible for this behaviour.
 130 #if XmVersion >= 1002
 131 #if XmVersion <  2000
 132     // JACS, 24/1/99: this seems to cause a malloc crash later on, e.g.
 133     // in controls sample.
 134     //
 135     // Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
 136     // XtUnmanageChild (optionLabel);
 137 #endif
 138 #endif
 139
 140     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 141
 142     ChangeFont(FALSE);
 143
 144     AttachWidget (parent, m_buttonWidget, m_formWidget, pos.x, pos.y, size.x, size.y);
 145
 146     ChangeBackgroundColour();
 147
 148     return TRUE;
 149 }
 150
 151 wxChoice::~wxChoice()
 152 {
 153     // For some reason destroying the menuWidget
 154     // can cause crashes on some machines. It will
 155     // be deleted implicitly by deleting the parent form
 156     // anyway.
 157     //  XtDestroyWidget (menuWidget);
 158     if (m_widgetList)
 159         delete[] m_widgetList;
 160
 161     if (GetMainWidget())
 162     {
 163         DetachWidget(GetMainWidget()); // Removes event handlers
 164         DetachWidget(m_formWidget);
 165
 166         XtDestroyWidget((Widget) m_formWidget);
 167         m_formWidget = (WXWidget) 0;
 168
 169         // Presumably the other widgets have been deleted now, via the form
 170         m_mainWidget = (WXWidget) 0;
 171         m_buttonWidget = (WXWidget) 0;
 172     }
 173 }
 174
 175 void wxChoice::Append(const wxString& item)
 176 {
 177     Widget w = XtVaCreateManagedWidget (wxStripMenuCodes(item),
 178 #if USE_GADGETS
 179         xmPushButtonGadgetClass, (Widget) m_menuWidget,
 180 #else
 181         xmPushButtonWidgetClass, (Widget) m_menuWidget,
 182 #endif
 183         NULL);
 184
 185     DoChangeBackgroundColour((WXWidget) w, m_backgroundColour);
 186
 187     if (m_font.Ok())
 188         XtVaSetValues (w,
 189         XmNfontList, (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_formWidget)),
 190         NULL);
 191
 192     WXWidget *new_widgetList = new WXWidget[m_noStrings + 1];
 193     int i;
 194     if (m_widgetList)
 195         for (i = 0; i < m_noStrings; i++)
 196             new_widgetList[i] = m_widgetList[i];
 197
 198     new_widgetList[m_noStrings] = (WXWidget) w;
 199
 200     if (m_widgetList)
 201         delete[] m_widgetList;
 202     m_widgetList = new_widgetList;
 203
 204     char mnem = wxFindMnemonic ((char*) (const char*) item);
 205     if (mnem != 0)
 206         XtVaSetValues (w, XmNmnemonic, mnem, NULL);
 207
 208     XtAddCallback (w, XmNactivateCallback, (XtCallbackProc) wxChoiceCallback, (XtPointer) this);
 209
 210     if (m_noStrings == 0 && m_buttonWidget)
 211     {
 212         XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, w, NULL);
 213         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 214         XmString text = XmStringCreateSimple ((char*) (const char*) item);
 215         XtVaSetValues (label,
 216             XmNlabelString, text,
 217             NULL);
 218         XmStringFree (text);
 219     }
 220     wxNode *node = m_stringList.Add (item);
 221     XtVaSetValues (w, XmNuserData, node->Data (), NULL);
 222
 223     if (m_noStrings == 0)
 224         m_clientList.Append((wxObject*) NULL);
 225     else
 226         m_clientList.Insert( m_clientList.Item(m_noStrings-1),
 227                                  (wxObject*) NULL );
 228     m_noStrings ++;
 229 }
 230
 231 void wxChoice::Delete(int WXUNUSED(n))
 232 {
 233     wxFAIL_MSG( "Sorry, wxChoice::Delete isn't implemented yet. Maybe you'd like to volunteer? :-)" );
 234
 235     // What should we do -- remove the callback for this button widget,
 236     // delete the m_stringList entry, delete the button widget, construct a new widget list
 237     // (see Append)
 238
 239     // TODO
 240     m_noStrings --;
 241 }
 242
 243 void wxChoice::Clear()
 244 {
 245     m_stringList.Clear ();
 246     int i;
 247     for (i = 0; i < m_noStrings; i++)
 248     {
 249         XtUnmanageChild ((Widget) m_widgetList[i]);
 250         XtDestroyWidget ((Widget) m_widgetList[i]);
 251     }
 252     if (m_noStrings)
 253         delete[] m_widgetList;
 254     m_widgetList = (WXWidget*) NULL;
 255     if (m_buttonWidget)
 256         XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, (Widget) NULL, NULL);
 257
 258     if ( HasClientObjectData() )
 259     {
 260         // destroy the data (due to Robert's idea of using wxList<wxObject>
 261         // and not wxList<wxClientData> we can't just say
 262         // m_clientList.DeleteContents(TRUE) - this would crash!
 263         wxNode *node = m_clientList.First();
 264         while ( node )
 265         {
 266             delete (wxClientData *)node->Data();
 267             node = node->Next();
 268         }
 269     }
 270     m_clientList.Clear();
 271
 272     m_noStrings = 0;
 273 }
 274
 275 int wxChoice::GetSelection() const
 276 {
 277     XmString text;
 278     char *s;
 279     Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 280     XtVaGetValues (label,
 281         XmNlabelString, &text,
 282         NULL);
 283
 284     if (XmStringGetLtoR (text, XmSTRING_DEFAULT_CHARSET, &s))
 285     {
 286         int i = 0;
 287         for (wxNode * node = m_stringList.First (); node; node = node->Next ())
 288         {
 289             char *s1 = (char *) node->Data ();
 290             if (s1 == s || strcmp (s1, s) == 0)
 291             {
 292                 XmStringFree(text) ;
 293                 XtFree (s);
 294                 return i;
 295             }
 296             else
 297                 i++;
 298         }            // for()
 299
 300         XmStringFree(text) ;
 301         XtFree (s);
 302         return -1;
 303     }
 304     XmStringFree(text) ;
 305     return -1;
 306 }
 307
 308 void wxChoice::SetSelection(int n)
 309 {
 310     m_inSetValue = TRUE;
 311
 312     wxNode *node = m_stringList.Nth (n);
 313     if (node)
 314     {
 315         Dimension selectionWidth, selectionHeight;
 316
 317         char *s = (char *) node->Data ();
 318         XmString text = XmStringCreateSimple (s);
 319         XtVaGetValues ((Widget) m_widgetList[n], XmNwidth, &selectionWidth, XmNheight, &selectionHeight, NULL);
 320         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 321         XtVaSetValues (label,
 322             XmNlabelString, text,
 323             NULL);
 324         XmStringFree (text);
 325         XtVaSetValues ((Widget) m_buttonWidget,
 326             XmNwidth, selectionWidth, XmNheight, selectionHeight,
 327             XmNmenuHistory, (Widget) m_widgetList[n], NULL);
 328     }
 329     m_inSetValue = FALSE;
 330 }
 331
 332 int wxChoice::FindString(const wxString& s) const
 333 {
 334     int i = 0;
 335     for (wxNode * node = m_stringList.First (); node; node = node->Next ())
 336     {
 337         char *s1 = (char *) node->Data ();
 338         if (s == s1)
 339         {
 340             return i;
 341         }
 342         else
 343             i++;
 344     }
 345     return -1;
 346 }
 347
 348 wxString wxChoice::GetString(int n) const
 349 {
 350     wxNode *node = m_stringList.Nth (n);
 351     if (node)
 352         return wxString((char *) node->Data ());
 353     else
 354         return wxEmptyString;
 355 }
 356
 357 void wxChoice::SetColumns(int n)
 358 {
 359     if (n<1) n = 1 ;
 360
 361     short numColumns = n ;
 362     Arg args[3];
 363
 364     XtSetArg(args[0], XmNnumColumns, numColumns);
 365     XtSetArg(args[1], XmNpacking, XmPACK_COLUMN);
 366     XtSetValues((Widget) m_menuWidget,args,2) ;
 367 }
 368
 369 int wxChoice::GetColumns(void) const
 370 {
 371     short numColumns ;
 372
 373     XtVaGetValues((Widget) m_menuWidget,XmNnumColumns,&numColumns,NULL) ;
 374     return numColumns ;
 375 }
 376
 377 void wxChoice::SetFocus()
 378 {
 379     XmProcessTraversal(XtParent((Widget)m_mainWidget), XmTRAVERSE_CURRENT);
 380 }
 381
 382 void wxChoice::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 383 {
 384     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 385     bool managed = XtIsManaged((Widget) m_formWidget);
 386
 387     if (managed)
 388         XtUnmanageChild ((Widget) m_formWidget);
 389
 390     int actualWidth = width, actualHeight = height;
 391
 392     if (width > -1)
 393     {
 394         int i;
 395         for (i = 0; i < m_noStrings; i++)
 396             XtVaSetValues ((Widget) m_widgetList[i], XmNwidth, actualWidth, NULL);
 397         XtVaSetValues ((Widget) m_buttonWidget, XmNwidth, actualWidth,
 398             NULL);
 399     }
 400     if (height > -1)
 401     {
 402         int i;
 403         for (i = 0; i < m_noStrings; i++)
 404             XtVaSetValues ((Widget) m_widgetList[i], XmNheight, actualHeight, NULL);
 405         XtVaSetValues ((Widget) m_buttonWidget, XmNheight, actualHeight,
 406             NULL);
 407     }
 408
 409     if (managed)
 410         XtManageChild ((Widget) m_formWidget);
 411     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 412
 413     wxControl::DoSetSize (x, y, width, height, sizeFlags);
 414 }
 415
 416 wxString wxChoice::GetStringSelection () const
 417 {
 418     int sel = GetSelection ();
 419     if (sel > -1)
 420         return wxString(this->GetString (sel));
 421     else
 422         return wxEmptyString;
 423 }
 424
 425 bool wxChoice::SetStringSelection (const wxString& s)
 426 {
 427     int sel = FindString (s);
 428     if (sel > -1)
 429     {
 430         SetSelection (sel);
 431         return TRUE;
 432     }
 433     else
 434         return FALSE;
 435 }
 436
 437 void wxChoice::Command(wxCommandEvent & event)
 438 {
 439     SetSelection (event.GetInt());
 440     ProcessCommand (event);
 441 }
 442
 443 void wxChoiceCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 444 {
 445     wxChoice *item = (wxChoice *) clientData;
 446     if (item)
 447     {
 448         if (item->InSetValue())
 449             return;
 450
 451         char *s = NULL;
 452         XtVaGetValues (w, XmNuserData, &s, NULL);
 453         if (s)
 454         {
 455             wxCommandEvent event (wxEVT_COMMAND_CHOICE_SELECTED, item->GetId());
 456             event.SetEventObject(item);
 457             event.m_commandInt = item->FindString (s);
 458             //            event.m_commandString = s;
 459             item->ProcessCommand (event);
 460         }
 461     }
 462 }
 463
 464 void wxChoice::ChangeFont(bool keepOriginalSize)
 465 {
 466     // Note that this causes the widget to be resized back
 467     // to its original size! We therefore have to set the size
 468     // back again. TODO: a better way in Motif?
 469     if (m_font.Ok())
 470     {
 471         int width, height, width1, height1;
 472         GetSize(& width, & height);
 473
 474         XmFontList fontList = (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_mainWidget));
 475         XtVaSetValues ((Widget) m_mainWidget, XmNfontList, fontList, NULL);
 476         XtVaSetValues ((Widget) m_buttonWidget, XmNfontList, fontList, NULL);
 477
 478         /* TODO: why does this cause a crash in XtWidgetToApplicationContext?
 479         int i;
 480         for (i = 0; i < m_noStrings; i++)
 481         XtVaSetValues ((Widget) m_widgetList[i], XmNfontList, fontList, NULL);
 482         */
 483         GetSize(& width1, & height1);
 484         if (keepOriginalSize && (width != width1 || height != height1))
 485         {
 486             SetSize(-1, -1, width, height);
 487         }
 488     }
 489 }
 490
 491 void wxChoice::ChangeBackgroundColour()
 492 {
 493     DoChangeBackgroundColour(m_formWidget, m_backgroundColour);
 494     DoChangeBackgroundColour(m_buttonWidget, m_backgroundColour);
 495     DoChangeBackgroundColour(m_menuWidget, m_backgroundColour);
 496     int i;
 497     for (i = 0; i < m_noStrings; i++)
 498         DoChangeBackgroundColour(m_widgetList[i], m_backgroundColour);
 499 }
 500
 501 void wxChoice::ChangeForegroundColour()
 502 {
 503     DoChangeForegroundColour(m_formWidget, m_foregroundColour);
 504     DoChangeForegroundColour(m_buttonWidget, m_foregroundColour);
 505     DoChangeForegroundColour(m_menuWidget, m_foregroundColour);
 506     int i;
 507     for (i = 0; i < m_noStrings; i++)
 508         DoChangeForegroundColour(m_widgetList[i], m_foregroundColour);
 509 }
 510
 511
 512 // These implement functions needed by wxControlWithItems.
 513 // Unfortunately, they're not all implemented yet.
 514
 515 int wxChoice::GetCount() const
 516 {
 517     return Number();
 518 }
 519
 520 int wxChoice::DoAppend(const wxString& item)
 521 {
 522     Append(item);
 523     return GetCount() - 1;
 524 }
 525
 526 // Just appends, doesn't yet insert
 527 void wxChoice::DoInsertItems(const wxArrayString& items, int WXUNUSED(pos))
 528 {
 529     size_t nItems = items.GetCount();
 530
 531     for ( size_t n = 0; n < nItems; n++ )
 532     {
 533         Append( items[n]);
 534     }
 535 }
 536
 537 void wxChoice::DoSetItems(const wxArrayString& items, void **WXUNUSED(clientData))
 538 {
 539     Clear();
 540     size_t nItems = items.GetCount();
 541
 542     for ( size_t n = 0; n < nItems; n++ )
 543     {
 544         Append(items[n]);
 545     }
 546 }
 547
 548 void wxChoice::DoSetFirstItem(int WXUNUSED(n))
 549 {
 550     wxFAIL_MSG( wxT("wxChoice::DoSetFirstItem not implemented") );
 551 }
 552
 553 void wxChoice::DoSetItemClientData(int n, void* clientData)
 554 {
 555     wxNode *node = m_clientList.Nth( n );
 556     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientData") );
 557
 558     node->SetData( (wxObject*) clientData );
 559 }
 560
 561 void* wxChoice::DoGetItemClientData(int n) const
 562 {
 563     wxNode *node = m_clientList.Nth( n );
 564     wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") );
 565
 566     return node->Data();
 567 }
 568
 569 void wxChoice::DoSetItemClientObject(int n, wxClientData* clientData)
 570 {
 571     wxNode *node = m_clientList.Nth( n );
 572     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") );
 573
 574     wxClientData *cd = (wxClientData*) node->Data();
 575     delete cd;
 576
 577     node->SetData( (wxObject*) clientData );
 578 }
 579
 580 wxClientData* wxChoice::DoGetItemClientObject(int n) const
 581 {
 582     wxNode *node = m_clientList.Nth( n );
 583     wxCHECK_MSG( node, (wxClientData *)NULL,
 584                  wxT("invalid index in wxChoice::DoGetItemClientObject") );
 585
 586     return (wxClientData*) node->Data();
 587 }
 588
 589 void wxChoice::Select(int n)
 590 {
 591     SetSelection(n);
 592 }
 593
 594 void wxChoice::SetString(int WXUNUSED(n), const wxString& WXUNUSED(s))
 595 {
 596     wxFAIL_MSG( wxT("wxChoice::SetString not implemented") );
 597 }