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 #define WIDTH_OVERHEAD 48
  40 #define WIDTH_OVERHEAD_SUBTRACT 40
  41 #define HEIGHT_OVERHEAD 15
  42
  43 IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
  44
  45 void wxChoiceCallback (Widget w, XtPointer clientData,
  46                        XtPointer ptr);
  47
  48 wxChoice::wxChoice()
  49 {
  50     Init();
  51 }
  52
  53 void wxChoice::Init()
  54 {
  55     InitBase();
  56
  57     m_noStrings = 0;
  58     m_buttonWidget = (WXWidget) 0;
  59     m_menuWidget = (WXWidget) 0;
  60     m_formWidget = (WXWidget) 0;
  61 }
  62
  63 bool wxChoice::Create(wxWindow *parent, wxWindowID id,
  64                       const wxPoint& pos,
  65                       const wxSize& size,
  66                       int n, const wxString choices[],
  67                       long style,
  68                       const wxValidator& validator,
  69                       const wxString& name)
  70 {
  71     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
  72         return FALSE;
  73
  74     Widget parentWidget = (Widget) parent->GetClientWidget();
  75
  76     m_formWidget = (WXWidget) XtVaCreateManagedWidget(name.c_str(),
  77         xmRowColumnWidgetClass, parentWidget,
  78         XmNmarginHeight, 0,
  79         XmNmarginWidth, 0,
  80         XmNpacking, XmPACK_TIGHT,
  81         XmNorientation, XmHORIZONTAL,
  82         XmNresizeWidth, False,
  83         XmNresizeHeight, False,
  84         NULL);
  85
  86     XtVaSetValues ((Widget) m_formWidget, XmNspacing, 0, NULL);
  87
  88     /*
  89     * Create the popup menu
  90     */
  91     m_menuWidget = (WXWidget) XmCreatePulldownMenu ((Widget) m_formWidget,
  92                                                     "choiceMenu", NULL, 0);
  93
  94     if (n > 0)
  95     {
  96         int i;
  97         for (i = 0; i < n; i++)
  98             Append (choices[i]);
  99     }
 100
 101     /*
 102     * Create button
 103     */
 104     Arg args[10];
 105     Cardinal argcnt = 0;
 106
 107     XtSetArg (args[argcnt], XmNsubMenuId, (Widget) m_menuWidget); ++argcnt;
 108     XtSetArg (args[argcnt], XmNmarginWidth, 0); ++argcnt;
 109     XtSetArg (args[argcnt], XmNmarginHeight, 0); ++argcnt;
 110     XtSetArg (args[argcnt], XmNpacking, XmPACK_TIGHT); ++argcnt;
 111     m_buttonWidget = (WXWidget) XmCreateOptionMenu ((Widget) m_formWidget,
 112                                                     "choiceButton",
 113                                                     args, argcnt);
 114
 115     m_mainWidget = m_buttonWidget;
 116
 117     XtManageChild ((Widget) m_buttonWidget);
 118
 119     // New code from Roland Haenel (roland_haenel@ac.cybercity.de)
 120     // Some time ago, I reported a problem with wxChoice-items under
 121     // Linux and Motif 2.0 (they caused sporadic GPFs). Now it seems
 122     // that I have found the code responsible for this behaviour.
 123 #if XmVersion >= 1002
 124 #if XmVersion <  2000
 125     // JACS, 24/1/99: this seems to cause a malloc crash later on, e.g.
 126     // in controls sample.
 127     //
 128     // Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
 129     // XtUnmanageChild (optionLabel);
 130 #endif
 131 #endif
 132
 133     wxSize bestSize = GetBestSize();
 134     if( size.x > 0 ) bestSize.x = size.x;
 135     if( size.y > 0 ) bestSize.y = size.y;
 136
 137     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 138
 139     ChangeFont(FALSE);
 140     ChangeBackgroundColour();
 141
 142     AttachWidget (parent, m_buttonWidget, m_formWidget,
 143                   pos.x, pos.y, bestSize.x, bestSize.y);
 144
 145     return TRUE;
 146 }
 147
 148 wxChoice::~wxChoice()
 149 {
 150     // For some reason destroying the menuWidget
 151     // can cause crashes on some machines. It will
 152     // be deleted implicitly by deleting the parent form
 153     // anyway.
 154     //  XtDestroyWidget (menuWidget);
 155
 156     if (GetMainWidget())
 157     {
 158         DetachWidget(GetMainWidget()); // Removes event handlers
 159         DetachWidget(m_formWidget);
 160
 161         XtDestroyWidget((Widget) m_formWidget);
 162         m_formWidget = (WXWidget) 0;
 163
 164         // Presumably the other widgets have been deleted now, via the form
 165         m_mainWidget = (WXWidget) 0;
 166         m_buttonWidget = (WXWidget) 0;
 167     }
 168     if ( HasClientObjectData() )
 169         m_clientDataDict.DestroyData();
 170 }
 171
 172 int wxChoice::DoAppend(const wxString& item)
 173 {
 174     Widget w = XtVaCreateManagedWidget (wxStripMenuCodes(item),
 175 #if USE_GADGETS
 176         xmPushButtonGadgetClass, (Widget) m_menuWidget,
 177 #else
 178         xmPushButtonWidgetClass, (Widget) m_menuWidget,
 179 #endif
 180         NULL);
 181
 182     wxDoChangeBackgroundColour((WXWidget) w, m_backgroundColour);
 183
 184     if( m_font.Ok() )
 185         wxDoChangeFont( w, m_font );
 186
 187     m_widgetArray.Add(w);
 188
 189     char mnem = wxFindMnemonic (item);
 190     if (mnem != 0)
 191         XtVaSetValues (w, XmNmnemonic, mnem, NULL);
 192
 193     XtAddCallback (w, XmNactivateCallback,
 194                    (XtCallbackProc) wxChoiceCallback,
 195                    (XtPointer) this);
 196
 197     if (m_noStrings == 0 && m_buttonWidget)
 198     {
 199         XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, w, NULL);
 200         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 201         wxXmString text( item );
 202         XtVaSetValues (label,
 203             XmNlabelString, text(),
 204             NULL);
 205     }
 206     m_stringList.Add(item);
 207     m_noStrings ++;
 208
 209     return GetCount() - 1;
 210 }
 211
 212 int wxChoice::DoInsert(const wxString& item, int pos)
 213 {
 214     wxCHECK_MSG(FALSE, -1, wxT("insert not implemented"));
 215
 216 //    wxCHECK_MSG((pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
 217 //    if (pos == GetCount()) return DoAppend(item);
 218 }
 219
 220 void wxChoice::Delete(int n)
 221 {
 222     Widget w = (Widget)m_widgetArray[n];
 223     XtRemoveCallback(w, XmNactivateCallback, (XtCallbackProc)wxChoiceCallback,
 224                      (XtPointer)this);
 225     m_stringList.DeleteNode(m_stringList.Item(n));
 226     m_widgetArray.RemoveAt(size_t(n));
 227     m_clientDataDict.Delete(n, HasClientObjectData());
 228
 229     XtDestroyWidget(w);
 230     m_noStrings --;
 231 }
 232
 233 void wxChoice::Clear()
 234 {
 235     m_stringList.Clear ();
 236     size_t i;
 237     for (i = 0; i < m_noStrings; i++)
 238     {
 239         XtRemoveCallback((Widget) m_widgetArray[i],
 240                          XmNactivateCallback, (XtCallbackProc)wxChoiceCallback,
 241                          (XtPointer)this);
 242         XtUnmanageChild ((Widget) m_widgetArray[i]);
 243         XtDestroyWidget ((Widget) m_widgetArray[i]);
 244     }
 245     m_widgetArray.Clear();
 246     if (m_buttonWidget)
 247         XtVaSetValues ((Widget) m_buttonWidget,
 248                        XmNmenuHistory, (Widget) NULL,
 249                        NULL);
 250
 251     if ( HasClientObjectData() )
 252         m_clientDataDict.DestroyData();
 253
 254     m_noStrings = 0;
 255 }
 256
 257 int wxChoice::GetSelection() const
 258 {
 259     XmString text;
 260     Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 261     XtVaGetValues (label,
 262         XmNlabelString, &text,
 263         NULL);
 264     wxXmString freeMe(text);
 265     wxString s = wxXmStringToString( text );
 266
 267     if (!s.IsEmpty())
 268     {
 269         int i = 0;
 270         for (wxStringListNode* node = m_stringList.GetFirst ();
 271              node; node = node->GetNext ())
 272         {
 273             if (wxStrcmp(node->GetData(), s.c_str()) == 0)
 274             {
 275                 return i;
 276             }
 277             else
 278                 i++;
 279         }            // for()
 280
 281         return -1;
 282     }
 283     return -1;
 284 }
 285
 286 void wxChoice::SetSelection(int n)
 287 {
 288     m_inSetValue = TRUE;
 289
 290     wxStringListNode *node = m_stringList.Item(n);
 291     if (node)
 292     {
 293 #if 0
 294         Dimension selectionWidth, selectionHeight;
 295 #endif
 296         wxXmString text( node->GetData() );
 297 // MBN: this seems silly, at best, and causes wxChoices to be clipped:
 298 //      will remove "soon"
 299 #if 0
 300         XtVaGetValues ((Widget) m_widgetArray[n],
 301                        XmNwidth, &selectionWidth,
 302                        XmNheight, &selectionHeight,
 303                        NULL);
 304 #endif
 305         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 306         XtVaSetValues (label,
 307             XmNlabelString, text(),
 308             NULL);
 309 #if 0
 310         XtVaSetValues ((Widget) m_buttonWidget,
 311             XmNwidth, selectionWidth, XmNheight, selectionHeight,
 312             XmNmenuHistory, (Widget) m_widgetArray[n], NULL);
 313 #endif
 314     }
 315     m_inSetValue = FALSE;
 316 }
 317
 318 int wxChoice::FindString(const wxString& s) const
 319 {
 320     int i = 0;
 321     for (wxStringListNode* node = m_stringList.GetFirst();
 322          node; node = node->GetNext ())
 323     {
 324         if (s == node->GetData())
 325             return i;
 326
 327         i++;
 328     }
 329
 330     return -1;
 331 }
 332
 333 wxString wxChoice::GetString(int n) const
 334 {
 335     wxStringListNode *node = m_stringList.Item(n);
 336     if (node)
 337         return node->GetData();
 338     else
 339         return wxEmptyString;
 340 }
 341
 342 void wxChoice::SetColumns(int n)
 343 {
 344     if (n<1) n = 1 ;
 345
 346     short numColumns = n ;
 347     Arg args[3];
 348
 349     XtSetArg(args[0], XmNnumColumns, numColumns);
 350     XtSetArg(args[1], XmNpacking, XmPACK_COLUMN);
 351     XtSetValues((Widget) m_menuWidget,args,2) ;
 352 }
 353
 354 int wxChoice::GetColumns(void) const
 355 {
 356     short numColumns ;
 357
 358     XtVaGetValues((Widget) m_menuWidget,XmNnumColumns,&numColumns,NULL) ;
 359     return numColumns ;
 360 }
 361
 362 void wxChoice::SetFocus()
 363 {
 364     XmProcessTraversal(XtParent((Widget)m_mainWidget), XmTRAVERSE_CURRENT);
 365 }
 366
 367 void wxChoice::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 368 {
 369     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 370     bool managed = XtIsManaged((Widget) m_formWidget);
 371
 372     if (managed)
 373         XtUnmanageChild ((Widget) m_formWidget);
 374
 375     int actualWidth = width - WIDTH_OVERHEAD_SUBTRACT,
 376         actualHeight = height - HEIGHT_OVERHEAD;
 377
 378     if (width > -1)
 379     {
 380         size_t i;
 381         for (i = 0; i < m_noStrings; i++)
 382             XtVaSetValues ((Widget) m_widgetArray[i],
 383                            XmNwidth, actualWidth,
 384                            NULL);
 385         XtVaSetValues ((Widget) m_buttonWidget, XmNwidth, actualWidth,
 386             NULL);
 387     }
 388     if (height > -1)
 389     {
 390 #if 0
 391         size_t i;
 392         for (i = 0; i < m_noStrings; i++)
 393             XtVaSetValues ((Widget) m_widgetArray[i],
 394                            XmNheight, actualHeight,
 395                            NULL);
 396 #endif
 397         XtVaSetValues ((Widget) m_buttonWidget, XmNheight, actualHeight,
 398             NULL);
 399     }
 400
 401     if (managed)
 402         XtManageChild ((Widget) m_formWidget);
 403     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 404
 405     wxControl::DoSetSize (x, y, width, height, sizeFlags);
 406 }
 407
 408 void wxChoice::Command(wxCommandEvent & event)
 409 {
 410     SetSelection (event.GetInt());
 411     ProcessCommand (event);
 412 }
 413
 414 void wxChoiceCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 415 {
 416     wxChoice *item = (wxChoice *) clientData;
 417     if (item)
 418     {
 419         if (item->InSetValue())
 420             return;
 421
 422         int n = item->GetWidgets().Index(w);
 423         if (n != wxNOT_FOUND)
 424         {
 425             wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, item->GetId());
 426             event.SetEventObject(item);
 427             event.m_commandInt = n;
 428             event.m_commandString = item->GetStrings().Item(n)->GetData();
 429             if ( item->HasClientObjectData() )
 430                 event.SetClientObject( item->GetClientObject(n) );
 431             else if ( item->HasClientUntypedData() )
 432                 event.SetClientData( item->GetClientData(n) );
 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         WXFontType fontType =
 449             m_font.GetFontType(XtDisplay((Widget) m_mainWidget));
 450         WXString fontTag = wxFont::GetFontTag();
 451
 452         XtVaSetValues ((Widget) m_formWidget, fontTag, fontType, NULL);
 453         XtVaSetValues ((Widget) m_buttonWidget, fontTag, fontType, NULL);
 454
 455         for( size_t i = 0; i < m_noStrings; ++i )
 456             XtVaSetValues( (Widget)m_widgetArray[i],
 457                            fontTag, fontType,
 458                            NULL );
 459
 460         GetSize(& width1, & height1);
 461         if (keepOriginalSize && (width != width1 || height != height1))
 462         {
 463             SetSize(-1, -1, width, height);
 464         }
 465     }
 466 }
 467
 468 void wxChoice::ChangeBackgroundColour()
 469 {
 470     wxDoChangeBackgroundColour(m_formWidget, m_backgroundColour);
 471     wxDoChangeBackgroundColour(m_buttonWidget, m_backgroundColour);
 472     wxDoChangeBackgroundColour(m_menuWidget, m_backgroundColour);
 473     size_t i;
 474     for (i = 0; i < m_noStrings; i++)
 475         wxDoChangeBackgroundColour(m_widgetArray[i], m_backgroundColour);
 476 }
 477
 478 void wxChoice::ChangeForegroundColour()
 479 {
 480     wxDoChangeForegroundColour(m_formWidget, m_foregroundColour);
 481     wxDoChangeForegroundColour(m_buttonWidget, m_foregroundColour);
 482     wxDoChangeForegroundColour(m_menuWidget, m_foregroundColour);
 483     size_t i;
 484     for (i = 0; i < m_noStrings; i++)
 485         wxDoChangeForegroundColour(m_widgetArray[i], m_foregroundColour);
 486 }
 487
 488 int wxChoice::GetCount() const
 489 {
 490     return m_noStrings;
 491 }
 492
 493 void wxChoice::DoSetItemClientData(int n, void* clientData)
 494 {
 495     m_clientDataDict.Set(n, (wxClientData*)clientData, FALSE);
 496 }
 497
 498 void* wxChoice::DoGetItemClientData(int n) const
 499 {
 500     return (void*)m_clientDataDict.Get(n);
 501 }
 502
 503 void wxChoice::DoSetItemClientObject(int n, wxClientData* clientData)
 504 {
 505     // don't delete, wxItemContainer does that for us
 506     m_clientDataDict.Set(n, clientData, FALSE);
 507 }
 508
 509 wxClientData* wxChoice::DoGetItemClientObject(int n) const
 510 {
 511     return m_clientDataDict.Get(n);
 512 }
 513
 514 void wxChoice::SetString(int WXUNUSED(n), const wxString& WXUNUSED(s))
 515 {
 516     wxFAIL_MSG( wxT("wxChoice::SetString not implemented") );
 517 }
 518
 519 wxSize wxChoice::GetItemsSize() const
 520 {
 521     int x, y, mx = 0, my = 0;
 522
 523     // get my
 524     GetTextExtent( "|", &x, &my );
 525
 526     wxStringList::Node* curr = m_stringList.GetFirst();
 527     while( curr )
 528     {
 529         GetTextExtent( curr->GetData(), &x, &y );
 530         mx = wxMax( mx, x );
 531         my = wxMax( my, y );
 532         curr = curr->GetNext();
 533     }
 534
 535     return wxSize( mx, my );
 536 }
 537
 538 wxSize wxChoice::DoGetBestSize() const
 539 {
 540     wxSize items = GetItemsSize();
 541     // FIXME arbitrary constants
 542     return wxSize( ( items.x ? items.x + WIDTH_OVERHEAD : 120 ),
 543                      items.y + HEIGHT_OVERHEAD );
 544 }