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