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     //    int i;
  89     if (n > 0)
  90     {
  91         int i;
  92         for (i = 0; i < n; i++)
  93             Append (choices[i]);
  94     }
  95
  96     /*
  97     * Create button
  98     */
  99     Arg args[10];
 100     Cardinal argcnt = 0;
 101
 102     XtSetArg (args[argcnt], XmNsubMenuId, (Widget) m_menuWidget); ++argcnt;
 103     XtSetArg (args[argcnt], XmNmarginWidth, 0); ++argcnt;
 104     XtSetArg (args[argcnt], XmNmarginHeight, 0); ++argcnt;
 105     XtSetArg (args[argcnt], XmNpacking, XmPACK_TIGHT); ++argcnt;
 106     m_buttonWidget = (WXWidget) XmCreateOptionMenu ((Widget) m_formWidget,
 107                                                     "choiceButton",
 108                                                     args, argcnt);
 109
 110     m_mainWidget = m_buttonWidget;
 111
 112     XtManageChild ((Widget) m_buttonWidget);
 113
 114     // New code from Roland Haenel (roland_haenel@ac.cybercity.de)
 115     // Some time ago, I reported a problem with wxChoice-items under
 116     // Linux and Motif 2.0 (they caused sporadic GPFs). Now it seems
 117     // that I have found the code responsible for this behaviour.
 118 #if XmVersion >= 1002
 119 #if XmVersion <  2000
 120     // JACS, 24/1/99: this seems to cause a malloc crash later on, e.g.
 121     // in controls sample.
 122     //
 123     // Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
 124     // XtUnmanageChild (optionLabel);
 125 #endif
 126 #endif
 127
 128     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 129
 130     ChangeFont(FALSE);
 131
 132     AttachWidget (parent, m_buttonWidget, m_formWidget,
 133                   pos.x, pos.y, size.x, size.y);
 134
 135     ChangeBackgroundColour();
 136
 137     return TRUE;
 138 }
 139
 140 wxChoice::~wxChoice()
 141 {
 142     // For some reason destroying the menuWidget
 143     // can cause crashes on some machines. It will
 144     // be deleted implicitly by deleting the parent form
 145     // anyway.
 146     //  XtDestroyWidget (menuWidget);
 147
 148     if (GetMainWidget())
 149     {
 150         DetachWidget(GetMainWidget()); // Removes event handlers
 151         DetachWidget(m_formWidget);
 152
 153         XtDestroyWidget((Widget) m_formWidget);
 154         m_formWidget = (WXWidget) 0;
 155
 156         // Presumably the other widgets have been deleted now, via the form
 157         m_mainWidget = (WXWidget) 0;
 158         m_buttonWidget = (WXWidget) 0;
 159     }
 160     if ( HasClientObjectData() )
 161         m_clientDataDict.DestroyData();
 162 }
 163
 164 int wxChoice::DoAppend(const wxString& item)
 165 {
 166     Widget w = XtVaCreateManagedWidget (wxStripMenuCodes(item),
 167 #if USE_GADGETS
 168         xmPushButtonGadgetClass, (Widget) m_menuWidget,
 169 #else
 170         xmPushButtonWidgetClass, (Widget) m_menuWidget,
 171 #endif
 172         NULL);
 173
 174     DoChangeBackgroundColour((WXWidget) w, m_backgroundColour);
 175
 176     if (m_font.Ok())
 177         XtVaSetValues (w,
 178         XmNfontList, (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_formWidget)),
 179         NULL);
 180
 181     m_widgetArray.Add(w);
 182
 183     char mnem = wxFindMnemonic ((char*) (const char*) item);
 184     if (mnem != 0)
 185         XtVaSetValues (w, XmNmnemonic, mnem, NULL);
 186
 187     XtAddCallback (w, XmNactivateCallback,
 188                    (XtCallbackProc) wxChoiceCallback,
 189                    (XtPointer) this);
 190
 191     if (m_noStrings == 0 && m_buttonWidget)
 192     {
 193         XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, w, NULL);
 194         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 195         XmString text = XmStringCreateSimple ((char*) (const char*) item);
 196         XtVaSetValues (label,
 197             XmNlabelString, text,
 198             NULL);
 199         XmStringFree (text);
 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     int 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     char *s;
 248     Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 249     XtVaGetValues (label,
 250         XmNlabelString, &text,
 251         NULL);
 252
 253     if (XmStringGetLtoR (text, XmSTRING_DEFAULT_CHARSET, &s))
 254     {
 255         int i = 0;
 256         for (wxStringListNode* node = m_stringList.GetFirst ();
 257              node; node = node->GetNext ())
 258         {
 259             if (strcmp(node->GetData(), s) == 0)
 260             {
 261                 XmStringFree(text) ;
 262                 XtFree (s);
 263                 return i;
 264             }
 265             else
 266                 i++;
 267         }            // for()
 268
 269         XmStringFree(text) ;
 270         XtFree (s);
 271         return -1;
 272     }
 273     XmStringFree(text) ;
 274     return -1;
 275 }
 276
 277 void wxChoice::SetSelection(int n)
 278 {
 279     m_inSetValue = TRUE;
 280
 281     wxStringListNode *node = m_stringList.Item(n);
 282     if (node)
 283     {
 284 #if 0
 285         Dimension selectionWidth, selectionHeight;
 286 #endif
 287         wxXmString text( (char*)node->Data() );
 288 // MBN: this seems silly, at best, and causes wxChoices to be clipped:
 289 //      will remove "soon"
 290 #if 0
 291         XtVaGetValues ((Widget) m_widgetArray[n],
 292                        XmNwidth, &selectionWidth,
 293                        XmNheight, &selectionHeight,
 294                        NULL);
 295 #endif
 296         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 297         XtVaSetValues (label,
 298             XmNlabelString, text(),
 299             NULL);
 300 #if 0
 301         XtVaSetValues ((Widget) m_buttonWidget,
 302             XmNwidth, selectionWidth, XmNheight, selectionHeight,
 303             XmNmenuHistory, (Widget) m_widgetArray[n], NULL);
 304 #endif
 305     }
 306     m_inSetValue = FALSE;
 307 }
 308
 309 int wxChoice::FindString(const wxString& s) const
 310 {
 311     int i = 0;
 312     for (wxStringListNode* node = m_stringList.GetFirst();
 313          node; node = node->GetNext ())
 314     {
 315         if (s == node->GetData())
 316             return i;
 317
 318         i++;
 319     }
 320
 321     return -1;
 322 }
 323
 324 wxString wxChoice::GetString(int n) const
 325 {
 326     wxStringListNode *node = m_stringList.Item(n);
 327     if (node)
 328         return node->GetData();
 329     else
 330         return wxEmptyString;
 331 }
 332
 333 void wxChoice::SetColumns(int n)
 334 {
 335     if (n<1) n = 1 ;
 336
 337     short numColumns = n ;
 338     Arg args[3];
 339
 340     XtSetArg(args[0], XmNnumColumns, numColumns);
 341     XtSetArg(args[1], XmNpacking, XmPACK_COLUMN);
 342     XtSetValues((Widget) m_menuWidget,args,2) ;
 343 }
 344
 345 int wxChoice::GetColumns(void) const
 346 {
 347     short numColumns ;
 348
 349     XtVaGetValues((Widget) m_menuWidget,XmNnumColumns,&numColumns,NULL) ;
 350     return numColumns ;
 351 }
 352
 353 void wxChoice::SetFocus()
 354 {
 355     XmProcessTraversal(XtParent((Widget)m_mainWidget), XmTRAVERSE_CURRENT);
 356 }
 357
 358 void wxChoice::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 359 {
 360     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 361     bool managed = XtIsManaged((Widget) m_formWidget);
 362
 363     if (managed)
 364         XtUnmanageChild ((Widget) m_formWidget);
 365
 366     int actualWidth = width, actualHeight = height;
 367
 368     if (width > -1)
 369     {
 370         int i;
 371         for (i = 0; i < m_noStrings; i++)
 372             XtVaSetValues ((Widget) m_widgetArray[i],
 373                            XmNwidth, actualWidth,
 374                            NULL);
 375         XtVaSetValues ((Widget) m_buttonWidget, XmNwidth, actualWidth,
 376             NULL);
 377     }
 378     if (height > -1)
 379     {
 380         int i;
 381         for (i = 0; i < m_noStrings; i++)
 382             XtVaSetValues ((Widget) m_widgetArray[i],
 383                            XmNheight, actualHeight,
 384                            NULL);
 385         XtVaSetValues ((Widget) m_buttonWidget, XmNheight, actualHeight,
 386             NULL);
 387     }
 388
 389     if (managed)
 390         XtManageChild ((Widget) m_formWidget);
 391     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 392
 393     wxControl::DoSetSize (x, y, width, height, sizeFlags);
 394 }
 395
 396 void wxChoice::Command(wxCommandEvent & event)
 397 {
 398     SetSelection (event.GetInt());
 399     ProcessCommand (event);
 400 }
 401
 402 void wxChoiceCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 403 {
 404     wxChoice *item = (wxChoice *) clientData;
 405     if (item)
 406     {
 407         if (item->InSetValue())
 408             return;
 409
 410         int n = item->GetWidgets().Index(w);
 411         if (n != wxNOT_FOUND)
 412         {
 413             wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, item->GetId());
 414             event.SetEventObject(item);
 415             event.m_commandInt = n;
 416             event.m_commandString = item->GetStrings().Item(n)->GetData();
 417             if ( item->HasClientObjectData() )
 418                 event.SetClientObject( item->GetClientObject(n) );
 419             else if ( item->HasClientUntypedData() )
 420                 event.SetClientData( item->GetClientData(n) );
 421             item->ProcessCommand (event);
 422         }
 423     }
 424 }
 425
 426 void wxChoice::ChangeFont(bool keepOriginalSize)
 427 {
 428     // Note that this causes the widget to be resized back
 429     // to its original size! We therefore have to set the size
 430     // back again. TODO: a better way in Motif?
 431     if (m_font.Ok())
 432     {
 433         int width, height, width1, height1;
 434         GetSize(& width, & height);
 435
 436         XmFontList fontList = (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_mainWidget));
 437         XtVaSetValues ((Widget) m_formWidget, XmNfontList, fontList, NULL);
 438         XtVaSetValues ((Widget) m_buttonWidget, XmNfontList, fontList, NULL);
 439
 440         for( size_t i = 0; i < m_noStrings; ++i )
 441             XtVaSetValues( (Widget)m_widgetArray[i],
 442                            XmNfontList, fontList,
 443                            NULL );
 444
 445         GetSize(& width1, & height1);
 446         if (keepOriginalSize && (width != width1 || height != height1))
 447         {
 448             SetSize(-1, -1, width, height);
 449         }
 450     }
 451 }
 452
 453 void wxChoice::ChangeBackgroundColour()
 454 {
 455     DoChangeBackgroundColour(m_formWidget, m_backgroundColour);
 456     DoChangeBackgroundColour(m_buttonWidget, m_backgroundColour);
 457     DoChangeBackgroundColour(m_menuWidget, m_backgroundColour);
 458     int i;
 459     for (i = 0; i < m_noStrings; i++)
 460         DoChangeBackgroundColour(m_widgetArray[i], m_backgroundColour);
 461 }
 462
 463 void wxChoice::ChangeForegroundColour()
 464 {
 465     DoChangeForegroundColour(m_formWidget, m_foregroundColour);
 466     DoChangeForegroundColour(m_buttonWidget, m_foregroundColour);
 467     DoChangeForegroundColour(m_menuWidget, m_foregroundColour);
 468     int i;
 469     for (i = 0; i < m_noStrings; i++)
 470         DoChangeForegroundColour(m_widgetArray[i], m_foregroundColour);
 471 }
 472
 473 int wxChoice::GetCount() const
 474 {
 475     return m_noStrings;
 476 }
 477
 478 void wxChoice::DoSetItemClientData(int n, void* clientData)
 479 {
 480     m_clientDataDict.Set(n, (wxClientData*)clientData, FALSE);
 481 }
 482
 483 void* wxChoice::DoGetItemClientData(int n) const
 484 {
 485     return (void*)m_clientDataDict.Get(n);
 486 }
 487
 488 void wxChoice::DoSetItemClientObject(int n, wxClientData* clientData)
 489 {
 490     // don't delete, wxItemContainer does that for us
 491     m_clientDataDict.Set(n, clientData, FALSE);
 492 }
 493
 494 wxClientData* wxChoice::DoGetItemClientObject(int n) const
 495 {
 496     return m_clientDataDict.Get(n);
 497 }
 498
 499 void wxChoice::SetString(int WXUNUSED(n), const wxString& WXUNUSED(s))
 500 {
 501     wxFAIL_MSG( wxT("wxChoice::SetString not implemented") );
 502 }
 503
 504 wxSize wxChoice::GetItemsSize() const
 505 {
 506     int x, y, mx = 0, my = 0;
 507
 508     // get my
 509     GetTextExtent( "|", &x, &my );
 510
 511     wxStringList::Node* curr = m_stringList.GetFirst();
 512     while( curr )
 513     {
 514         GetTextExtent( curr->GetData(), &x, &y );
 515         mx = wxMax( mx, x );
 516         my = wxMax( my, y );
 517         curr = curr->GetNext();
 518     }
 519
 520     return wxSize( mx, my );
 521 }
 522
 523 wxSize wxChoice::DoGetBestSize() const
 524 {
 525     wxSize items = GetItemsSize();
 526     // FIXME arbitrary constants
 527     return wxSize( ( items.x ? items.x + 50 : 120 ),
 528                      items.y + 15 );
 529 }