src/motif/choice.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/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 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if wxUSE_CHOICE
  16
  17 #ifdef __VMS
  18 #define XtDisplay XTDISPLAY
  19 #define XtParent XTPARENT
  20 #endif
  21
  22 #include "wx/choice.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/utils.h"
  26     #include "wx/arrstr.h"
  27 #endif
  28
  29 #ifdef __VMS__
  30 #pragma message disable nosimpint
  31 #endif
  32 #include <Xm/Xm.h>
  33 #include <Xm/PushBG.h>
  34 #include <Xm/PushB.h>
  35 #include <Xm/RowColumn.h>
  36 #ifdef __VMS__
  37 #pragma message enable nosimpint
  38 #endif
  39
  40 #include "wx/motif/private.h"
  41
  42 #define WIDTH_OVERHEAD 48
  43 #define WIDTH_OVERHEAD_SUBTRACT 40
  44 #define HEIGHT_OVERHEAD 15
  45
  46 IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
  47
  48 void wxChoiceCallback (Widget w, XtPointer clientData,
  49                        XtPointer ptr);
  50
  51 wxChoice::wxChoice()
  52 {
  53     Init();
  54 }
  55
  56 void wxChoice::Init()
  57 {
  58     m_noStrings = 0;
  59     m_buttonWidget = (WXWidget) 0;
  60     m_menuWidget = (WXWidget) 0;
  61     m_formWidget = (WXWidget) 0;
  62 }
  63
  64 bool wxChoice::Create(wxWindow *parent, wxWindowID id,
  65                       const wxPoint& pos,
  66                       const wxSize& size,
  67                       int n, const wxString choices[],
  68                       long style,
  69                       const wxValidator& validator,
  70                       const wxString& name)
  71 {
  72     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
  73         return false;
  74     PreCreation();
  75
  76     Widget parentWidget = (Widget) parent->GetClientWidget();
  77
  78     m_formWidget = (WXWidget) XtVaCreateManagedWidget(name.c_str(),
  79         xmRowColumnWidgetClass, parentWidget,
  80         XmNmarginHeight, 0,
  81         XmNmarginWidth, 0,
  82         XmNpacking, XmPACK_TIGHT,
  83         XmNorientation, XmHORIZONTAL,
  84         XmNresizeWidth, False,
  85         XmNresizeHeight, False,
  86         NULL);
  87
  88     XtVaSetValues ((Widget) m_formWidget, XmNspacing, 0, NULL);
  89
  90     /*
  91     * Create the popup menu
  92     */
  93     m_menuWidget = (WXWidget) XmCreatePulldownMenu ((Widget) m_formWidget,
  94                                                     wxMOTIF_STR("choiceMenu"),
  95                                                     NULL, 0);
  96
  97     if (n > 0)
  98     {
  99         int i;
 100         for (i = 0; i < n; i++)
 101             Append (choices[i]);
 102     }
 103
 104     /*
 105     * Create button
 106     */
 107     Arg args[10];
 108     Cardinal argcnt = 0;
 109
 110     XtSetArg (args[argcnt], XmNsubMenuId, (Widget) m_menuWidget); ++argcnt;
 111     XtSetArg (args[argcnt], XmNmarginWidth, 0); ++argcnt;
 112     XtSetArg (args[argcnt], XmNmarginHeight, 0); ++argcnt;
 113     XtSetArg (args[argcnt], XmNpacking, XmPACK_TIGHT); ++argcnt;
 114     m_buttonWidget = (WXWidget) XmCreateOptionMenu ((Widget) m_formWidget,
 115                                                     wxMOTIF_STR("choiceButton"),
 116                                                     args, argcnt);
 117
 118     m_mainWidget = m_buttonWidget;
 119
 120     XtManageChild ((Widget) m_buttonWidget);
 121
 122     // New code from Roland Haenel (roland_haenel@ac.cybercity.de)
 123     // Some time ago, I reported a problem with wxChoice-items under
 124     // Linux and Motif 2.0 (they caused sporadic GPFs). Now it seems
 125     // that I have found the code responsible for this behaviour.
 126 #if XmVersion >= 1002
 127 #if XmVersion <  2000
 128     // JACS, 24/1/99: this seems to cause a malloc crash later on, e.g.
 129     // in controls sample.
 130     //
 131     // Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
 132     // XtUnmanageChild (optionLabel);
 133 #endif
 134 #endif
 135
 136     wxSize bestSize = GetBestSize();
 137     if( size.x > 0 ) bestSize.x = size.x;
 138     if( size.y > 0 ) bestSize.y = size.y;
 139
 140     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 141
 142     PostCreation();
 143     AttachWidget (parent, m_buttonWidget, m_formWidget,
 144                   pos.x, pos.y, bestSize.x, bestSize.y);
 145
 146     return true;
 147 }
 148
 149 bool wxChoice::Create(wxWindow *parent, wxWindowID id,
 150                       const wxPoint& pos,
 151                       const wxSize& size,
 152                       const wxArrayString& choices,
 153                       long style,
 154                       const wxValidator& validator,
 155                       const wxString& name)
 156 {
 157     wxCArrayString chs(choices);
 158     return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
 159                   style, validator, name);
 160 }
 161
 162 wxChoice::~wxChoice()
 163 {
 164     // For some reason destroying the menuWidget
 165     // can cause crashes on some machines. It will
 166     // be deleted implicitly by deleting the parent form
 167     // anyway.
 168     //  XtDestroyWidget (menuWidget);
 169
 170     if (GetMainWidget())
 171     {
 172         DetachWidget(GetMainWidget()); // Removes event handlers
 173         DetachWidget(m_formWidget);
 174
 175         XtDestroyWidget((Widget) m_formWidget);
 176         m_formWidget = (WXWidget) 0;
 177
 178         // Presumably the other widgets have been deleted now, via the form
 179         m_mainWidget = (WXWidget) 0;
 180         m_buttonWidget = (WXWidget) 0;
 181     }
 182 }
 183
 184 static inline wxChar* MYcopystring(const wxChar* s)
 185 {
 186     wxChar* copy = new wxChar[wxStrlen(s) + 1];
 187     return wxStrcpy(copy, s);
 188 }
 189
 190 // TODO auto-sorting is not supported by the code
 191 int wxChoice::DoInsertItems(const wxArrayStringsAdapter& items,
 192                             unsigned int pos,
 193                             void **clientData, wxClientDataType type)
 194 {
 195 #ifndef XmNpositionIndex
 196     wxCHECK_MSG( pos == GetCount(), -1, wxT("insert not implemented"));
 197 #endif
 198
 199     const unsigned int numItems = items.GetCount();
 200     AllocClientData(numItems);
 201     for( unsigned int i = 0; i < numItems; ++i, ++pos )
 202     {
 203         Widget w = XtVaCreateManagedWidget (GetLabelText(items[i]),
 204 #if wxUSE_GADGETS
 205             xmPushButtonGadgetClass, (Widget) m_menuWidget,
 206 #else
 207             xmPushButtonWidgetClass, (Widget) m_menuWidget,
 208 #endif
 209 #ifdef XmNpositionIndex
 210             XmNpositionIndex, pos,
 211 #endif
 212             NULL);
 213
 214         wxDoChangeBackgroundColour((WXWidget) w, m_backgroundColour);
 215
 216         if( m_font.Ok() )
 217             wxDoChangeFont( w, m_font );
 218
 219         m_widgetArray.Insert(w, pos);
 220
 221         char mnem = wxFindMnemonic (items[i]);
 222         if (mnem != 0)
 223             XtVaSetValues (w, XmNmnemonic, mnem, NULL);
 224
 225         XtAddCallback (w, XmNactivateCallback,
 226                        (XtCallbackProc) wxChoiceCallback,
 227                        (XtPointer) this);
 228
 229         if (m_noStrings == 0 && m_buttonWidget)
 230         {
 231             XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, w, NULL);
 232             Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 233             wxXmString text( items[i] );
 234             XtVaSetValues (label,
 235                 XmNlabelString, text(),
 236                 NULL);
 237         }
 238         // need to ditch wxStringList for wxArrayString
 239         m_stringList.Insert(pos, MYcopystring(items[i]));
 240         m_noStrings ++;
 241
 242         InsertNewItemClientData(pos, clientData, i, type);
 243     }
 244
 245     return pos - 1;
 246 }
 247
 248 void wxChoice::DoDeleteOneItem(unsigned int n)
 249 {
 250     Widget w = (Widget)m_widgetArray[n];
 251     XtRemoveCallback(w, XmNactivateCallback, (XtCallbackProc)wxChoiceCallback,
 252                      (XtPointer)this);
 253     m_stringList.Erase(m_stringList.Item(n));
 254     m_widgetArray.RemoveAt(size_t(n));
 255     wxChoiceBase::DoDeleteOneItem(n);
 256
 257     XtDestroyWidget(w);
 258     m_noStrings--;
 259 }
 260
 261 void wxChoice::DoClear()
 262 {
 263     m_stringList.Clear ();
 264     unsigned int i;
 265     for (i = 0; i < m_noStrings; i++)
 266     {
 267         XtRemoveCallback((Widget) m_widgetArray[i],
 268                          XmNactivateCallback, (XtCallbackProc)wxChoiceCallback,
 269                          (XtPointer)this);
 270         XtUnmanageChild ((Widget) m_widgetArray[i]);
 271         XtDestroyWidget ((Widget) m_widgetArray[i]);
 272     }
 273     m_widgetArray.Clear();
 274     if (m_buttonWidget)
 275         XtVaSetValues ((Widget) m_buttonWidget,
 276                        XmNmenuHistory, (Widget) NULL,
 277                        NULL);
 278
 279     wxChoiceBase::DoClear();
 280
 281     m_noStrings = 0;
 282 }
 283
 284 int wxChoice::GetSelection() const
 285 {
 286     XmString text;
 287     Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 288     XtVaGetValues (label,
 289         XmNlabelString, &text,
 290         NULL);
 291     wxXmString freeMe(text);
 292     wxString s = wxXmStringToString( text );
 293
 294     if (!s.empty())
 295     {
 296         int i = 0;
 297         for (wxStringList::compatibility_iterator node = m_stringList.GetFirst ();
 298              node; node = node->GetNext ())
 299         {
 300             if (wxStrcmp(node->GetData(), s.c_str()) == 0)
 301             {
 302                 return i;
 303             }
 304             else
 305                 i++;
 306         }            // for()
 307
 308         return -1;
 309     }
 310     return -1;
 311 }
 312
 313 void wxChoice::SetSelection(int n)
 314 {
 315     m_inSetValue = true;
 316
 317     wxStringList::compatibility_iterator node = m_stringList.Item(n);
 318     if (node)
 319     {
 320 #if 0
 321         Dimension selectionWidth, selectionHeight;
 322 #endif
 323         wxXmString text( node->GetData() );
 324 // MBN: this seems silly, at best, and causes wxChoices to be clipped:
 325 //      will remove "soon"
 326 #if 0
 327         XtVaGetValues ((Widget) m_widgetArray[n],
 328                        XmNwidth, &selectionWidth,
 329                        XmNheight, &selectionHeight,
 330                        NULL);
 331 #endif
 332         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 333         XtVaSetValues (label,
 334             XmNlabelString, text(),
 335             NULL);
 336 #if 0
 337         XtVaSetValues ((Widget) m_buttonWidget,
 338             XmNwidth, selectionWidth, XmNheight, selectionHeight,
 339             XmNmenuHistory, (Widget) m_widgetArray[n], NULL);
 340 #endif
 341     }
 342     m_inSetValue = false;
 343 }
 344
 345 wxString wxChoice::GetString(unsigned int n) const
 346 {
 347     wxStringList::compatibility_iterator node = m_stringList.Item(n);
 348     if (node)
 349         return node->GetData();
 350     else
 351         return wxEmptyString;
 352 }
 353
 354 void wxChoice::SetColumns(int n)
 355 {
 356     if (n<1) n = 1 ;
 357
 358     short numColumns = (short)n ;
 359     Arg args[3];
 360
 361     XtSetArg(args[0], XmNnumColumns, numColumns);
 362     XtSetArg(args[1], XmNpacking, XmPACK_COLUMN);
 363     XtSetValues((Widget) m_menuWidget,args,2) ;
 364 }
 365
 366 int wxChoice::GetColumns(void) const
 367 {
 368     short numColumns ;
 369
 370     XtVaGetValues((Widget) m_menuWidget,XmNnumColumns,&numColumns,NULL) ;
 371     return numColumns ;
 372 }
 373
 374 void wxChoice::SetFocus()
 375 {
 376     XmProcessTraversal(XtParent((Widget)m_mainWidget), XmTRAVERSE_CURRENT);
 377 }
 378
 379 void wxChoice::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 380 {
 381     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 382     bool managed = XtIsManaged((Widget) m_formWidget);
 383
 384     if (managed)
 385         XtUnmanageChild ((Widget) m_formWidget);
 386
 387     int actualWidth = width - WIDTH_OVERHEAD_SUBTRACT,
 388         actualHeight = height - HEIGHT_OVERHEAD;
 389
 390     if (width > -1)
 391     {
 392         unsigned int i;
 393         for (i = 0; i < m_noStrings; i++)
 394             XtVaSetValues ((Widget) m_widgetArray[i],
 395                            XmNwidth, actualWidth,
 396                            NULL);
 397         XtVaSetValues ((Widget) m_buttonWidget, XmNwidth, actualWidth,
 398             NULL);
 399     }
 400     if (height > -1)
 401     {
 402 #if 0
 403         unsigned int i;
 404         for (i = 0; i < m_noStrings; i++)
 405             XtVaSetValues ((Widget) m_widgetArray[i],
 406                            XmNheight, actualHeight,
 407                            NULL);
 408 #endif
 409         XtVaSetValues ((Widget) m_buttonWidget, XmNheight, actualHeight,
 410             NULL);
 411     }
 412
 413     if (managed)
 414         XtManageChild ((Widget) m_formWidget);
 415     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 416
 417     wxControl::DoSetSize (x, y, width, height, sizeFlags);
 418 }
 419
 420 void wxChoice::Command(wxCommandEvent & event)
 421 {
 422     SetSelection (event.GetInt());
 423     ProcessCommand (event);
 424 }
 425
 426 void wxChoiceCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 427 {
 428     wxChoice *item = (wxChoice *) clientData;
 429     if (item)
 430     {
 431         if (item->InSetValue())
 432             return;
 433
 434         int n = item->GetWidgets().Index(w);
 435         if (n != wxNOT_FOUND)
 436         {
 437             wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, item->GetId());
 438             event.SetEventObject(item);
 439             event.SetInt(n);
 440             event.SetString( item->GetStrings().Item(n)->GetData() );
 441             if ( item->HasClientObjectData() )
 442                 event.SetClientObject( item->GetClientObject(n) );
 443             else if ( item->HasClientUntypedData() )
 444                 event.SetClientData( item->GetClientData(n) );
 445             item->ProcessCommand (event);
 446         }
 447     }
 448 }
 449
 450 void wxChoice::ChangeFont(bool keepOriginalSize)
 451 {
 452     // Note that this causes the widget to be resized back
 453     // to its original size! We therefore have to set the size
 454     // back again. TODO: a better way in Motif?
 455     if (m_mainWidget && m_font.Ok())
 456     {
 457         Display* dpy = XtDisplay((Widget) m_mainWidget);
 458         int width, height, width1, height1;
 459         GetSize(& width, & height);
 460
 461         WXString fontTag = wxFont::GetFontTag();
 462
 463         XtVaSetValues ((Widget) m_formWidget,
 464                        fontTag, m_font.GetFontTypeC(dpy),
 465                        NULL);
 466         XtVaSetValues ((Widget) m_buttonWidget,
 467                        fontTag, m_font.GetFontTypeC(dpy),
 468                        NULL);
 469
 470         for( unsigned int i = 0; i < m_noStrings; ++i )
 471             XtVaSetValues( (Widget)m_widgetArray[i],
 472                            fontTag, m_font.GetFontTypeC(dpy),
 473                            NULL );
 474
 475         GetSize(& width1, & height1);
 476         if (keepOriginalSize && (width != width1 || height != height1))
 477         {
 478             SetSize(wxDefaultCoord, wxDefaultCoord, width, height);
 479         }
 480     }
 481 }
 482
 483 void wxChoice::ChangeBackgroundColour()
 484 {
 485     wxDoChangeBackgroundColour(m_formWidget, m_backgroundColour);
 486     wxDoChangeBackgroundColour(m_buttonWidget, m_backgroundColour);
 487     wxDoChangeBackgroundColour(m_menuWidget, m_backgroundColour);
 488     unsigned int i;
 489     for (i = 0; i < m_noStrings; i++)
 490         wxDoChangeBackgroundColour(m_widgetArray[i], m_backgroundColour);
 491 }
 492
 493 void wxChoice::ChangeForegroundColour()
 494 {
 495     wxDoChangeForegroundColour(m_formWidget, m_foregroundColour);
 496     wxDoChangeForegroundColour(m_buttonWidget, m_foregroundColour);
 497     wxDoChangeForegroundColour(m_menuWidget, m_foregroundColour);
 498     unsigned int i;
 499     for (i = 0; i < m_noStrings; i++)
 500         wxDoChangeForegroundColour(m_widgetArray[i], m_foregroundColour);
 501 }
 502
 503 unsigned int wxChoice::GetCount() const
 504 {
 505     return m_noStrings;
 506 }
 507
 508 void wxChoice::SetString(unsigned int WXUNUSED(n), const wxString& WXUNUSED(s))
 509 {
 510     wxFAIL_MSG( wxT("wxChoice::SetString not implemented") );
 511 }
 512
 513 wxSize wxChoice::GetItemsSize() const
 514 {
 515     int x, y, mx = 0, my = 0;
 516
 517     // get my
 518     GetTextExtent( "|", &x, &my );
 519
 520     wxStringList::compatibility_iterator curr = m_stringList.GetFirst();
 521     while( curr )
 522     {
 523         GetTextExtent( curr->GetData(), &x, &y );
 524         mx = wxMax( mx, x );
 525         my = wxMax( my, y );
 526         curr = curr->GetNext();
 527     }
 528
 529     return wxSize( mx, my );
 530 }
 531
 532 wxSize wxChoice::DoGetBestSize() const
 533 {
 534     wxSize items = GetItemsSize();
 535     // FIXME arbitrary constants
 536     return wxSize( ( items.x ? items.x + WIDTH_OVERHEAD : 120 ),
 537                      items.y + HEIGHT_OVERHEAD );
 538 }
 539
 540 #endif // wxUSE_CHOICE