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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "choice.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __VMS
  20 #define XtDisplay XTDISPLAY
  21 #define XtParent XTPARENT
  22 #endif
  23
  24 #include "wx/defs.h"
  25
  26 #if wxUSE_CHOICE
  27
  28 #include "wx/choice.h"
  29 #include "wx/utils.h"
  30 #include "wx/arrstr.h"
  31
  32 #ifdef __VMS__
  33 #pragma message disable nosimpint
  34 #endif
  35 #include <Xm/Xm.h>
  36 #include <Xm/PushBG.h>
  37 #include <Xm/PushB.h>
  38 #include <Xm/RowColumn.h>
  39 #ifdef __VMS__
  40 #pragma message enable nosimpint
  41 #endif
  42
  43 #include "wx/motif/private.h"
  44
  45 #define WIDTH_OVERHEAD 48
  46 #define WIDTH_OVERHEAD_SUBTRACT 40
  47 #define HEIGHT_OVERHEAD 15
  48
  49 IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
  50
  51 void wxChoiceCallback (Widget w, XtPointer clientData,
  52                        XtPointer ptr);
  53
  54 wxChoice::wxChoice()
  55 {
  56     Init();
  57 }
  58
  59 void wxChoice::Init()
  60 {
  61     m_noStrings = 0;
  62     m_buttonWidget = (WXWidget) 0;
  63     m_menuWidget = (WXWidget) 0;
  64     m_formWidget = (WXWidget) 0;
  65 }
  66
  67 bool wxChoice::Create(wxWindow *parent, wxWindowID id,
  68                       const wxPoint& pos,
  69                       const wxSize& size,
  70                       int n, const wxString choices[],
  71                       long style,
  72                       const wxValidator& validator,
  73                       const wxString& name)
  74 {
  75     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
  76         return false;
  77
  78     Widget parentWidget = (Widget) parent->GetClientWidget();
  79
  80     m_formWidget = (WXWidget) XtVaCreateManagedWidget(name.c_str(),
  81         xmRowColumnWidgetClass, parentWidget,
  82         XmNmarginHeight, 0,
  83         XmNmarginWidth, 0,
  84         XmNpacking, XmPACK_TIGHT,
  85         XmNorientation, XmHORIZONTAL,
  86         XmNresizeWidth, False,
  87         XmNresizeHeight, False,
  88         NULL);
  89
  90     XtVaSetValues ((Widget) m_formWidget, XmNspacing, 0, NULL);
  91
  92     /*
  93     * Create the popup menu
  94     */
  95     m_menuWidget = (WXWidget) XmCreatePulldownMenu ((Widget) m_formWidget,
  96                                                     "choiceMenu", NULL, 0);
  97
  98     if (n > 0)
  99     {
 100         int i;
 101         for (i = 0; i < n; i++)
 102             Append (choices[i]);
 103     }
 104
 105     /*
 106     * Create button
 107     */
 108     Arg args[10];
 109     Cardinal argcnt = 0;
 110
 111     XtSetArg (args[argcnt], XmNsubMenuId, (Widget) m_menuWidget); ++argcnt;
 112     XtSetArg (args[argcnt], XmNmarginWidth, 0); ++argcnt;
 113     XtSetArg (args[argcnt], XmNmarginHeight, 0); ++argcnt;
 114     XtSetArg (args[argcnt], XmNpacking, XmPACK_TIGHT); ++argcnt;
 115     m_buttonWidget = (WXWidget) XmCreateOptionMenu ((Widget) m_formWidget,
 116                                                     "choiceButton",
 117                                                     args, argcnt);
 118
 119     m_mainWidget = m_buttonWidget;
 120
 121     XtManageChild ((Widget) m_buttonWidget);
 122
 123     // New code from Roland Haenel (roland_haenel@ac.cybercity.de)
 124     // Some time ago, I reported a problem with wxChoice-items under
 125     // Linux and Motif 2.0 (they caused sporadic GPFs). Now it seems
 126     // that I have found the code responsible for this behaviour.
 127 #if XmVersion >= 1002
 128 #if XmVersion <  2000
 129     // JACS, 24/1/99: this seems to cause a malloc crash later on, e.g.
 130     // in controls sample.
 131     //
 132     // Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
 133     // XtUnmanageChild (optionLabel);
 134 #endif
 135 #endif
 136
 137     wxSize bestSize = GetBestSize();
 138     if( size.x > 0 ) bestSize.x = size.x;
 139     if( size.y > 0 ) bestSize.y = size.y;
 140
 141     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 142
 143     ChangeFont(false);
 144     ChangeBackgroundColour();
 145
 146     AttachWidget (parent, m_buttonWidget, m_formWidget,
 147                   pos.x, pos.y, bestSize.x, bestSize.y);
 148
 149     return true;
 150 }
 151
 152 bool wxChoice::Create(wxWindow *parent, wxWindowID id,
 153                       const wxPoint& pos,
 154                       const wxSize& size,
 155                       const wxArrayString& choices,
 156                       long style,
 157                       const wxValidator& validator,
 158                       const wxString& name)
 159 {
 160     wxCArrayString chs(choices);
 161     return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
 162                   style, validator, name);
 163 }
 164
 165 wxChoice::~wxChoice()
 166 {
 167     // For some reason destroying the menuWidget
 168     // can cause crashes on some machines. It will
 169     // be deleted implicitly by deleting the parent form
 170     // anyway.
 171     //  XtDestroyWidget (menuWidget);
 172
 173     if (GetMainWidget())
 174     {
 175         DetachWidget(GetMainWidget()); // Removes event handlers
 176         DetachWidget(m_formWidget);
 177
 178         XtDestroyWidget((Widget) m_formWidget);
 179         m_formWidget = (WXWidget) 0;
 180
 181         // Presumably the other widgets have been deleted now, via the form
 182         m_mainWidget = (WXWidget) 0;
 183         m_buttonWidget = (WXWidget) 0;
 184     }
 185     if ( HasClientObjectData() )
 186         m_clientDataDict.DestroyData();
 187 }
 188
 189 int wxChoice::DoAppend(const wxString& item)
 190 {
 191     Widget w = XtVaCreateManagedWidget (wxStripMenuCodes(item),
 192 #if wxUSE_GADGETS
 193         xmPushButtonGadgetClass, (Widget) m_menuWidget,
 194 #else
 195         xmPushButtonWidgetClass, (Widget) m_menuWidget,
 196 #endif
 197         NULL);
 198
 199     wxDoChangeBackgroundColour((WXWidget) w, m_backgroundColour);
 200
 201     if( m_font.Ok() )
 202         wxDoChangeFont( w, m_font );
 203
 204     m_widgetArray.Add(w);
 205
 206     char mnem = wxFindMnemonic (item);
 207     if (mnem != 0)
 208         XtVaSetValues (w, XmNmnemonic, mnem, NULL);
 209
 210     XtAddCallback (w, XmNactivateCallback,
 211                    (XtCallbackProc) wxChoiceCallback,
 212                    (XtPointer) this);
 213
 214     if (m_noStrings == 0 && m_buttonWidget)
 215     {
 216         XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, w, NULL);
 217         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 218         wxXmString text( item );
 219         XtVaSetValues (label,
 220             XmNlabelString, text(),
 221             NULL);
 222     }
 223     m_stringList.Add(item);
 224     m_noStrings ++;
 225
 226     return GetCount() - 1;
 227 }
 228
 229 int wxChoice::DoInsert(const wxString& item, int pos)
 230 {
 231     wxCHECK_MSG(false, -1, wxT("insert not implemented"));
 232
 233 //    wxCHECK_MSG((pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
 234 //    if (pos == GetCount()) return DoAppend(item);
 235 }
 236
 237 void wxChoice::Delete(int n)
 238 {
 239     Widget w = (Widget)m_widgetArray[n];
 240     XtRemoveCallback(w, XmNactivateCallback, (XtCallbackProc)wxChoiceCallback,
 241                      (XtPointer)this);
 242     m_stringList.Erase(m_stringList.Item(n));
 243     m_widgetArray.RemoveAt(size_t(n));
 244     m_clientDataDict.Delete(n, HasClientObjectData());
 245
 246     XtDestroyWidget(w);
 247     m_noStrings --;
 248 }
 249
 250 void wxChoice::Clear()
 251 {
 252     m_stringList.Clear ();
 253     size_t i;
 254     for (i = 0; i < m_noStrings; i++)
 255     {
 256         XtRemoveCallback((Widget) m_widgetArray[i],
 257                          XmNactivateCallback, (XtCallbackProc)wxChoiceCallback,
 258                          (XtPointer)this);
 259         XtUnmanageChild ((Widget) m_widgetArray[i]);
 260         XtDestroyWidget ((Widget) m_widgetArray[i]);
 261     }
 262     m_widgetArray.Clear();
 263     if (m_buttonWidget)
 264         XtVaSetValues ((Widget) m_buttonWidget,
 265                        XmNmenuHistory, (Widget) NULL,
 266                        NULL);
 267
 268     if ( HasClientObjectData() )
 269         m_clientDataDict.DestroyData();
 270
 271     m_noStrings = 0;
 272 }
 273
 274 int wxChoice::GetSelection() const
 275 {
 276     XmString text;
 277     Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 278     XtVaGetValues (label,
 279         XmNlabelString, &text,
 280         NULL);
 281     wxXmString freeMe(text);
 282     wxString s = wxXmStringToString( text );
 283
 284     if (!s.IsEmpty())
 285     {
 286         int i = 0;
 287         for (wxStringList::compatibility_iterator node = m_stringList.GetFirst ();
 288              node; node = node->GetNext ())
 289         {
 290             if (wxStrcmp(node->GetData(), s.c_str()) == 0)
 291             {
 292                 return i;
 293             }
 294             else
 295                 i++;
 296         }            // for()
 297
 298         return -1;
 299     }
 300     return -1;
 301 }
 302
 303 void wxChoice::SetSelection(int n)
 304 {
 305     m_inSetValue = true;
 306
 307     wxStringList::compatibility_iterator node = m_stringList.Item(n);
 308     if (node)
 309     {
 310 #if 0
 311         Dimension selectionWidth, selectionHeight;
 312 #endif
 313         wxXmString text( node->GetData() );
 314 // MBN: this seems silly, at best, and causes wxChoices to be clipped:
 315 //      will remove "soon"
 316 #if 0
 317         XtVaGetValues ((Widget) m_widgetArray[n],
 318                        XmNwidth, &selectionWidth,
 319                        XmNheight, &selectionHeight,
 320                        NULL);
 321 #endif
 322         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 323         XtVaSetValues (label,
 324             XmNlabelString, text(),
 325             NULL);
 326 #if 0
 327         XtVaSetValues ((Widget) m_buttonWidget,
 328             XmNwidth, selectionWidth, XmNheight, selectionHeight,
 329             XmNmenuHistory, (Widget) m_widgetArray[n], NULL);
 330 #endif
 331     }
 332     m_inSetValue = false;
 333 }
 334
 335 int wxChoice::FindString(const wxString& s) const
 336 {
 337     int i = 0;
 338     for (wxStringList::compatibility_iterator node = m_stringList.GetFirst();
 339          node; node = node->GetNext ())
 340     {
 341         if (s == node->GetData())
 342             return i;
 343
 344         i++;
 345     }
 346
 347     return wxNOT_FOUND;
 348 }
 349
 350 wxString wxChoice::GetString(int n) const
 351 {
 352     wxStringList::compatibility_iterator node = m_stringList.Item(n);
 353     if (node)
 354         return node->GetData();
 355     else
 356         return wxEmptyString;
 357 }
 358
 359 void wxChoice::SetColumns(int n)
 360 {
 361     if (n<1) n = 1 ;
 362
 363     short numColumns = n ;
 364     Arg args[3];
 365
 366     XtSetArg(args[0], XmNnumColumns, numColumns);
 367     XtSetArg(args[1], XmNpacking, XmPACK_COLUMN);
 368     XtSetValues((Widget) m_menuWidget,args,2) ;
 369 }
 370
 371 int wxChoice::GetColumns(void) const
 372 {
 373     short numColumns ;
 374
 375     XtVaGetValues((Widget) m_menuWidget,XmNnumColumns,&numColumns,NULL) ;
 376     return numColumns ;
 377 }
 378
 379 void wxChoice::SetFocus()
 380 {
 381     XmProcessTraversal(XtParent((Widget)m_mainWidget), XmTRAVERSE_CURRENT);
 382 }
 383
 384 void wxChoice::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 385 {
 386     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 387     bool managed = XtIsManaged((Widget) m_formWidget);
 388
 389     if (managed)
 390         XtUnmanageChild ((Widget) m_formWidget);
 391
 392     int actualWidth = width - WIDTH_OVERHEAD_SUBTRACT,
 393         actualHeight = height - HEIGHT_OVERHEAD;
 394
 395     if (width > -1)
 396     {
 397         size_t i;
 398         for (i = 0; i < m_noStrings; i++)
 399             XtVaSetValues ((Widget) m_widgetArray[i],
 400                            XmNwidth, actualWidth,
 401                            NULL);
 402         XtVaSetValues ((Widget) m_buttonWidget, XmNwidth, actualWidth,
 403             NULL);
 404     }
 405     if (height > -1)
 406     {
 407 #if 0
 408         size_t i;
 409         for (i = 0; i < m_noStrings; i++)
 410             XtVaSetValues ((Widget) m_widgetArray[i],
 411                            XmNheight, actualHeight,
 412                            NULL);
 413 #endif
 414         XtVaSetValues ((Widget) m_buttonWidget, XmNheight, actualHeight,
 415             NULL);
 416     }
 417
 418     if (managed)
 419         XtManageChild ((Widget) m_formWidget);
 420     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 421
 422     wxControl::DoSetSize (x, y, width, height, sizeFlags);
 423 }
 424
 425 void wxChoice::Command(wxCommandEvent & event)
 426 {
 427     SetSelection (event.GetInt());
 428     ProcessCommand (event);
 429 }
 430
 431 void wxChoiceCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 432 {
 433     wxChoice *item = (wxChoice *) clientData;
 434     if (item)
 435     {
 436         if (item->InSetValue())
 437             return;
 438
 439         int n = item->GetWidgets().Index(w);
 440         if (n != wxNOT_FOUND)
 441         {
 442             wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, item->GetId());
 443             event.SetEventObject(item);
 444             event.SetInt(n);
 445             event.SetString( item->GetStrings().Item(n)->GetData() );
 446             if ( item->HasClientObjectData() )
 447                 event.SetClientObject( item->GetClientObject(n) );
 448             else if ( item->HasClientUntypedData() )
 449                 event.SetClientData( item->GetClientData(n) );
 450             item->ProcessCommand (event);
 451         }
 452     }
 453 }
 454
 455 void wxChoice::ChangeFont(bool keepOriginalSize)
 456 {
 457     // Note that this causes the widget to be resized back
 458     // to its original size! We therefore have to set the size
 459     // back again. TODO: a better way in Motif?
 460     if (m_font.Ok())
 461     {
 462         Display* dpy = XtDisplay((Widget) m_mainWidget);
 463         int width, height, width1, height1;
 464         GetSize(& width, & height);
 465
 466         WXString fontTag = wxFont::GetFontTag();
 467
 468         XtVaSetValues ((Widget) m_formWidget,
 469                        fontTag, m_font.GetFontTypeC(dpy),
 470                        NULL);
 471         XtVaSetValues ((Widget) m_buttonWidget,
 472                        fontTag, m_font.GetFontTypeC(dpy),
 473                        NULL);
 474
 475         for( size_t i = 0; i < m_noStrings; ++i )
 476             XtVaSetValues( (Widget)m_widgetArray[i],
 477                            fontTag, m_font.GetFontTypeC(dpy),
 478                            NULL );
 479
 480         GetSize(& width1, & height1);
 481         if (keepOriginalSize && (width != width1 || height != height1))
 482         {
 483             SetSize(wxDefaultCoord, wxDefaultCoord, width, height);
 484         }
 485     }
 486 }
 487
 488 void wxChoice::ChangeBackgroundColour()
 489 {
 490     wxDoChangeBackgroundColour(m_formWidget, m_backgroundColour);
 491     wxDoChangeBackgroundColour(m_buttonWidget, m_backgroundColour);
 492     wxDoChangeBackgroundColour(m_menuWidget, m_backgroundColour);
 493     size_t i;
 494     for (i = 0; i < m_noStrings; i++)
 495         wxDoChangeBackgroundColour(m_widgetArray[i], m_backgroundColour);
 496 }
 497
 498 void wxChoice::ChangeForegroundColour()
 499 {
 500     wxDoChangeForegroundColour(m_formWidget, m_foregroundColour);
 501     wxDoChangeForegroundColour(m_buttonWidget, m_foregroundColour);
 502     wxDoChangeForegroundColour(m_menuWidget, m_foregroundColour);
 503     size_t i;
 504     for (i = 0; i < m_noStrings; i++)
 505         wxDoChangeForegroundColour(m_widgetArray[i], m_foregroundColour);
 506 }
 507
 508 int wxChoice::GetCount() const
 509 {
 510     return m_noStrings;
 511 }
 512
 513 void wxChoice::DoSetItemClientData(int n, void* clientData)
 514 {
 515     m_clientDataDict.Set(n, (wxClientData*)clientData, false);
 516 }
 517
 518 void* wxChoice::DoGetItemClientData(int n) const
 519 {
 520     return (void*)m_clientDataDict.Get(n);
 521 }
 522
 523 void wxChoice::DoSetItemClientObject(int n, wxClientData* clientData)
 524 {
 525     // don't delete, wxItemContainer does that for us
 526     m_clientDataDict.Set(n, clientData, false);
 527 }
 528
 529 wxClientData* wxChoice::DoGetItemClientObject(int n) const
 530 {
 531     return m_clientDataDict.Get(n);
 532 }
 533
 534 void wxChoice::SetString(int WXUNUSED(n), const wxString& WXUNUSED(s))
 535 {
 536     wxFAIL_MSG( wxT("wxChoice::SetString not implemented") );
 537 }
 538
 539 wxSize wxChoice::GetItemsSize() const
 540 {
 541     int x, y, mx = 0, my = 0;
 542
 543     // get my
 544     GetTextExtent( "|", &x, &my );
 545
 546     wxStringList::compatibility_iterator curr = m_stringList.GetFirst();
 547     while( curr )
 548     {
 549         GetTextExtent( curr->GetData(), &x, &y );
 550         mx = wxMax( mx, x );
 551         my = wxMax( my, y );
 552         curr = curr->GetNext();
 553     }
 554
 555     return wxSize( mx, my );
 556 }
 557
 558 wxSize wxChoice::DoGetBestSize() const
 559 {
 560     wxSize items = GetItemsSize();
 561     // FIXME arbitrary constants
 562     return wxSize( ( items.x ? items.x + WIDTH_OVERHEAD : 120 ),
 563                      items.y + HEIGHT_OVERHEAD );
 564 }
 565
 566 #endif // wxUSE_CHOICE