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