src/motif/listbox.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/listbox.cpp
   3 // Purpose:     wxListBox
   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_LISTBOX
  16
  17 #include "wx/listbox.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/dynarray.h"
  21     #include "wx/log.h"
  22     #include "wx/utils.h"
  23     #include "wx/settings.h"
  24     #include "wx/arrstr.h"
  25 #endif
  26
  27 #ifdef __VMS
  28 #define XtParent XTPARENT
  29 #define XtDisplay XTDISPLAY
  30 #endif
  31
  32 #ifdef __VMS__
  33 #pragma message disable nosimpint
  34 #endif
  35 #include <Xm/List.h>
  36 #ifdef __VMS__
  37 #pragma message enable nosimpint
  38 #endif
  39 #include "wx/motif/private.h"
  40
  41     IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
  42
  43 static void wxListBoxCallback(Widget w,
  44                               XtPointer clientData,
  45                               XmListCallbackStruct * cbs);
  46
  47 // ----------------------------------------------------------------------------
  48 // wxSizeKeeper
  49 // ----------------------------------------------------------------------------
  50
  51 // helper class to reduce code duplication
  52 class wxSizeKeeper
  53 {
  54     int m_x, m_y;
  55     wxWindow* m_w;
  56 public:
  57     wxSizeKeeper( wxWindow* w )
  58         : m_w( w )
  59     {
  60         m_w->GetSize( &m_x, &m_y );
  61     }
  62
  63     void Restore()
  64     {
  65         int x, y;
  66
  67         m_w->GetSize( &x, &y );
  68         if( x != m_x || y != m_y )
  69             m_w->SetSize( -1, -1, m_x, m_y );
  70     }
  71 };
  72
  73 // ============================================================================
  74 // list box control implementation
  75 // ============================================================================
  76
  77 // Listbox item
  78 wxListBox::wxListBox()
  79 {
  80     m_noItems = 0;
  81 }
  82
  83 bool wxListBox::Create(wxWindow *parent, wxWindowID id,
  84                        const wxPoint& pos,
  85                        const wxSize& size,
  86                        int n, const wxString choices[],
  87                        long style,
  88                        const wxValidator& validator,
  89                        const wxString& name)
  90 {
  91     if( !wxControl::CreateControl( parent, id, pos, size, style,
  92                                    validator, name ) )
  93         return false;
  94
  95     m_noItems = (unsigned int)n;
  96     m_backgroundColour = * wxWHITE;
  97
  98     Widget parentWidget = (Widget) parent->GetClientWidget();
  99     Display* dpy = XtDisplay(parentWidget);
 100
 101     Arg args[4];
 102     int count = 0;
 103     XtSetArg( args[count], XmNlistSizePolicy, XmCONSTANT ); ++count;
 104     XtSetArg( args[count], XmNselectionPolicy,
 105               ( m_windowStyle & wxLB_MULTIPLE ) ? XmMULTIPLE_SELECT :
 106               ( m_windowStyle & wxLB_EXTENDED ) ? XmEXTENDED_SELECT :
 107                                                   XmBROWSE_SELECT );
 108     ++count;
 109     if( m_font.Ok() )
 110     {
 111         XtSetArg( args[count],
 112                   (String)wxFont::GetFontTag(), m_font.GetFontTypeC(dpy) );
 113         ++count;
 114     }
 115     if( m_windowStyle & wxLB_ALWAYS_SB )
 116     {
 117         XtSetArg( args[count], XmNscrollBarDisplayPolicy, XmSTATIC );
 118         ++count;
 119     }
 120
 121     Widget listWidget =
 122         XmCreateScrolledList(parentWidget,
 123                              wxConstCast(name.c_str(), char), args, count);
 124
 125     m_mainWidget = (WXWidget) listWidget;
 126
 127     Set(n, choices);
 128
 129     XtManageChild (listWidget);
 130
 131     wxSize best = GetBestSize();
 132     if( size.x != -1 ) best.x = size.x;
 133     if( size.y != -1 ) best.y = size.y;
 134
 135     XtAddCallback (listWidget,
 136                    XmNbrowseSelectionCallback,
 137                    (XtCallbackProc) wxListBoxCallback,
 138                    (XtPointer) this);
 139     XtAddCallback (listWidget,
 140                    XmNextendedSelectionCallback,
 141                    (XtCallbackProc) wxListBoxCallback,
 142                    (XtPointer) this);
 143     XtAddCallback (listWidget,
 144                    XmNmultipleSelectionCallback,
 145                    (XtCallbackProc) wxListBoxCallback,
 146                    (XtPointer) this);
 147     XtAddCallback (listWidget,
 148                    XmNdefaultActionCallback,
 149                    (XtCallbackProc) wxListBoxCallback,
 150                    (XtPointer) this);
 151
 152     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
 153                   pos.x, pos.y, best.x, best.y);
 154
 155     ChangeBackgroundColour();
 156
 157     return true;
 158 }
 159
 160 bool wxListBox::Create(wxWindow *parent, wxWindowID id,
 161                        const wxPoint& pos,
 162                        const wxSize& size,
 163                        const wxArrayString& choices,
 164                        long style,
 165                        const wxValidator& validator,
 166                        const wxString& name)
 167 {
 168     wxCArrayString chs(choices);
 169     return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
 170                   style, validator, name);
 171 }
 172
 173 wxListBox::~wxListBox()
 174 {
 175     if( HasClientObjectData() )
 176         m_clientDataDict.DestroyData();
 177 }
 178
 179 void wxListBox::SetSelectionPolicy()
 180 {
 181     Widget listBox = (Widget)m_mainWidget;
 182     Arg args[3];
 183
 184     XtSetArg( args[0], XmNlistSizePolicy, XmCONSTANT );
 185
 186     XtSetArg( args[1], XmNselectionPolicy,
 187               ( m_windowStyle & wxLB_MULTIPLE ) ? XmMULTIPLE_SELECT :
 188               ( m_windowStyle & wxLB_EXTENDED ) ? XmEXTENDED_SELECT :
 189                                                   XmBROWSE_SELECT );
 190
 191     XtSetValues( listBox, args, 2 );
 192 }
 193
 194 void wxListBox::DoSetFirstItem( int N )
 195 {
 196     int count, length;
 197
 198     if (!IsValid(N))
 199         return;
 200
 201     XtVaGetValues ((Widget) m_mainWidget,
 202                     XmNvisibleItemCount, &count,
 203                     XmNitemCount, &length,
 204                     NULL);
 205     if ((N + count) >= length)
 206         N = length - count;
 207     XmListSetPos ((Widget) m_mainWidget, N + 1);
 208 }
 209
 210 void wxListBox::Delete(unsigned int n)
 211 {
 212     Widget listBox = (Widget) m_mainWidget;
 213
 214     XmListDeletePos (listBox, n + 1);
 215
 216     m_clientDataDict.Delete(n, HasClientObjectData());
 217     m_noItems --;
 218 }
 219
 220 int wxListBox::DoAppend(const wxString& item)
 221 {
 222     Widget listBox = (Widget) m_mainWidget;
 223
 224     int n;
 225     XtVaGetValues (listBox, XmNitemCount, &n, NULL);
 226     wxXmString text( item );
 227     //  XmListAddItem(listBox, text, n + 1);
 228     XmListAddItemUnselected (listBox, text(), 0);
 229
 230     // It seems that if the list is cleared, we must re-ask for
 231     // selection policy!!
 232     SetSelectionPolicy();
 233
 234     m_noItems ++;
 235
 236     return GetCount() - 1;
 237 }
 238
 239 void wxListBox::DoSetItems(const wxArrayString& items, void** clientData)
 240 {
 241     Widget listBox = (Widget) m_mainWidget;
 242
 243     if( HasClientObjectData() )
 244         m_clientDataDict.DestroyData();
 245
 246     XmString *text = new XmString[items.GetCount()];
 247     unsigned int i;
 248     for (i = 0; i < items.GetCount(); ++i)
 249         text[i] = wxStringToXmString (items[i]);
 250
 251     if ( clientData )
 252         for (i = 0; i < items.GetCount(); ++i)
 253             m_clientDataDict.Set(i, (wxClientData*)clientData[i], false);
 254
 255     XmListAddItems (listBox, text, items.GetCount(), 0);
 256     for (i = 0; i < items.GetCount(); i++)
 257         XmStringFree (text[i]);
 258     delete[] text;
 259
 260     // It seems that if the list is cleared, we must re-ask for
 261     // selection policy!!
 262     SetSelectionPolicy();
 263
 264     m_noItems = items.GetCount();
 265 }
 266
 267 int wxDoFindStringInList(Widget w, const wxString& s)
 268 {
 269     wxXmString str( s );
 270     int *positions = NULL;
 271     int no_positions = 0;
 272     bool success = XmListGetMatchPos (w, str(),
 273                                       &positions, &no_positions);
 274
 275     if (success)
 276     {
 277         int pos = positions[0];
 278         if (positions)
 279             XtFree ((char *) positions);
 280         return pos - 1;
 281     }
 282     else
 283         return -1;
 284 }
 285
 286 int wxListBox::FindString(const wxString& s, bool WXUNUSED(bCase)) const
 287 {
 288     // FIXME: back to base class for not supported value of bCase
 289
 290     return wxDoFindStringInList( (Widget)m_mainWidget, s );
 291 }
 292
 293 void wxListBox::Clear()
 294 {
 295     if (m_noItems <= 0)
 296         return;
 297
 298     wxSizeKeeper sk( this );
 299     Widget listBox = (Widget) m_mainWidget;
 300
 301     XmListDeleteAllItems (listBox);
 302     if( HasClientObjectData() )
 303         m_clientDataDict.DestroyData();
 304
 305     sk.Restore();
 306
 307     m_noItems = 0;
 308 }
 309
 310 void wxListBox::DoSetSelection(int N, bool select)
 311 {
 312     m_inSetValue = true;
 313     if (select)
 314     {
 315 #if 0
 316         if (m_windowStyle & wxLB_MULTIPLE)
 317         {
 318             int *selections = NULL;
 319             int n = GetSelections (&selections);
 320
 321             // This hack is supposed to work, to make it possible
 322             // to select more than one item, but it DOESN'T under Motif 1.1.
 323
 324             XtVaSetValues ((Widget) m_mainWidget,
 325                            XmNselectionPolicy, XmMULTIPLE_SELECT,
 326                            NULL);
 327
 328             int i;
 329             for (i = 0; i < n; i++)
 330                 XmListSelectPos ((Widget) m_mainWidget,
 331                                  selections[i] + 1, False);
 332
 333             XmListSelectPos ((Widget) m_mainWidget, N + 1, False);
 334
 335             XtVaSetValues ((Widget) m_mainWidget,
 336                            XmNselectionPolicy, XmEXTENDED_SELECT,
 337                            NULL);
 338         }
 339         else
 340 #endif // 0
 341             XmListSelectPos ((Widget) m_mainWidget, N + 1, False);
 342
 343     }
 344     else
 345         XmListDeselectPos ((Widget) m_mainWidget, N + 1);
 346
 347     m_inSetValue = false;
 348 }
 349
 350 bool wxListBox::IsSelected(int N) const
 351 {
 352     // In Motif, no simple way to determine if the item is selected.
 353     wxArrayInt theSelections;
 354     int count = GetSelections (theSelections);
 355     if (count == 0)
 356         return false;
 357     else
 358     {
 359         int j;
 360         for (j = 0; j < count; j++)
 361             if (theSelections[j] == N)
 362                 return true;
 363     }
 364     return false;
 365 }
 366
 367 void wxListBox::DoSetItemClientObject(unsigned int n, wxClientData* clientData)
 368 {
 369     m_clientDataDict.Set(n, clientData, false);
 370 }
 371
 372 wxClientData* wxListBox::DoGetItemClientObject(unsigned int n) const
 373 {
 374     return m_clientDataDict.Get(n);
 375 }
 376
 377 void *wxListBox::DoGetItemClientData(unsigned int n) const
 378 {
 379     return (void*)m_clientDataDict.Get(n);
 380 }
 381
 382 void wxListBox::DoSetItemClientData(unsigned int n, void *Client_data)
 383 {
 384     m_clientDataDict.Set(n, (wxClientData*)Client_data, false);
 385 }
 386
 387 // Return number of selections and an array of selected integers
 388 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 389 {
 390     aSelections.Empty();
 391
 392     Widget listBox = (Widget) m_mainWidget;
 393     int *posList = NULL;
 394     int posCnt = 0;
 395     bool flag = XmListGetSelectedPos (listBox, &posList, &posCnt);
 396     if (flag)
 397     {
 398         if (posCnt > 0)
 399         {
 400             aSelections.Alloc(posCnt);
 401
 402             int i;
 403             for (i = 0; i < posCnt; i++)
 404                 aSelections.Add(posList[i] - 1);
 405
 406             XtFree ((char *) posList);
 407             return posCnt;
 408         }
 409         else
 410             return 0;
 411     }
 412     else
 413         return 0;
 414 }
 415
 416 // Get single selection, for single choice list items
 417 int wxDoGetSelectionInList(Widget listBox)
 418 {
 419     int *posList = NULL;
 420     int posCnt = 0;
 421     bool flag = XmListGetSelectedPos (listBox, &posList, &posCnt);
 422     if (flag)
 423     {
 424         int id = -1;
 425         if (posCnt > 0)
 426             id = posList[0] - 1;
 427         XtFree ((char *) posList);
 428         return id;
 429     }
 430     else
 431         return -1;
 432 }
 433
 434 int wxListBox::GetSelection() const
 435 {
 436     return wxDoGetSelectionInList((Widget) m_mainWidget);
 437 }
 438
 439 // Find string for position
 440 wxString wxDoGetStringInList( Widget listBox, int n )
 441 {
 442     XmString *strlist;
 443     int count;
 444     XtVaGetValues( listBox,
 445                    XmNitemCount, &count,
 446                    XmNitems, &strlist,
 447                    NULL );
 448     if( n < count && n >= 0 )
 449         return wxXmStringToString( strlist[n] );
 450     else
 451         return wxEmptyString;
 452 }
 453
 454 wxString wxListBox::GetString(unsigned int n) const
 455 {
 456     return wxDoGetStringInList( (Widget)m_mainWidget, n );
 457 }
 458
 459 void wxListBox::DoInsertItems(const wxArrayString& items, unsigned int pos)
 460 {
 461     Widget listBox = (Widget) m_mainWidget;
 462
 463     XmString *text = new XmString[items.GetCount()];
 464     unsigned int i;
 465     // Steve Hammes: Motif 1.1 compatibility
 466     // #if XmVersion > 1100
 467     // Corrected by Sergey Krasnov from Steve Hammes' code
 468 #if XmVersion > 1001
 469     for (i = 0; i < items.GetCount(); i++)
 470         text[i] = wxStringToXmString(items[i]);
 471     XmListAddItemsUnselected(listBox, text, items.GetCount(), pos+1);
 472 #else
 473     for (i = 0; i < items.GetCount(); i++)
 474     {
 475         text[i] = wxStringToXmString(items[i]);
 476         // Another Sergey correction
 477         XmListAddItemUnselected(listBox, text[i], pos+i+1);
 478     }
 479 #endif
 480     for (i = 0; i < items.GetCount(); i++)
 481         XmStringFree(text[i]);
 482     delete[] text;
 483
 484     // It seems that if the list is cleared, we must re-ask for
 485     // selection policy!!
 486     SetSelectionPolicy();
 487
 488     m_noItems += items.GetCount();
 489 }
 490
 491 void wxListBox::SetString(unsigned int n, const wxString& s)
 492 {
 493     wxSizeKeeper sk( this );
 494     Widget listBox = (Widget) m_mainWidget;
 495
 496     wxXmString text( s );
 497
 498     // delete the item and add it again.
 499     // FIXME isn't there a way to change it in place?
 500     XmListDeletePos (listBox, n+1);
 501     XmListAddItem (listBox, text(), n+1);
 502
 503     sk.Restore();
 504 }
 505
 506 void wxListBox::Command (wxCommandEvent & event)
 507 {
 508     if (event.GetExtraLong())
 509         SetSelection (event.GetInt());
 510     else
 511     {
 512         Deselect (event.GetInt());
 513         return;
 514     }
 515     ProcessCommand (event);
 516 }
 517
 518 void wxListBoxCallback (Widget WXUNUSED(w), XtPointer clientData,
 519                         XmListCallbackStruct * cbs)
 520 {
 521     wxListBox *item = (wxListBox *) clientData;
 522
 523     if (item->InSetValue())
 524         return;
 525
 526     wxEventType evtType;
 527
 528     if( cbs->reason == XmCR_DEFAULT_ACTION )
 529         evtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
 530     else
 531         evtType = wxEVT_COMMAND_LISTBOX_SELECTED;
 532
 533     int n = cbs->item_position - 1;
 534     wxCommandEvent event (evtType, item->GetId());
 535     if ( item->HasClientObjectData() )
 536         event.SetClientObject( item->GetClientObject(n) );
 537     else if ( item->HasClientUntypedData() )
 538         event.SetClientData( item->GetClientData(n) );
 539     event.SetInt(n);
 540     event.SetExtraLong(true);
 541     event.SetEventObject(item);
 542     event.SetString( item->GetString( n ) );
 543
 544     int x = -1;
 545     if( NULL != cbs->event && cbs->event->type == ButtonRelease )
 546     {
 547         XButtonEvent* evt = (XButtonEvent*)cbs->event;
 548
 549         x = evt->x;
 550     }
 551
 552     switch (cbs->reason)
 553     {
 554     case XmCR_MULTIPLE_SELECT:
 555     case XmCR_BROWSE_SELECT:
 556 #if wxUSE_CHECKLISTBOX
 557         item->DoToggleItem( n, x );
 558 #endif
 559     case XmCR_DEFAULT_ACTION:
 560         item->GetEventHandler()->ProcessEvent(event);
 561         break;
 562     case XmCR_EXTENDED_SELECT:
 563         switch (cbs->selection_type)
 564         {
 565         case XmINITIAL:
 566         case XmADDITION:
 567         case XmMODIFICATION:
 568             item->DoToggleItem( n, x );
 569             item->GetEventHandler()->ProcessEvent(event);
 570             break;
 571         }
 572         break;
 573     }
 574 }
 575
 576 WXWidget wxListBox::GetTopWidget() const
 577 {
 578     return (WXWidget) XtParent( (Widget) m_mainWidget );
 579 }
 580
 581 void wxListBox::ChangeBackgroundColour()
 582 {
 583     wxWindow::ChangeBackgroundColour();
 584
 585     Widget parent = XtParent ((Widget) m_mainWidget);
 586     Widget hsb, vsb;
 587
 588     XtVaGetValues (parent,
 589         XmNhorizontalScrollBar, &hsb,
 590         XmNverticalScrollBar, &vsb,
 591         NULL);
 592
 593    /* TODO: should scrollbars be affected? Should probably have separate
 594     * function to change them (by default, taken from wxSystemSettings)
 595     */
 596     wxColour backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 597     wxDoChangeBackgroundColour((WXWidget) hsb, backgroundColour, true);
 598     wxDoChangeBackgroundColour((WXWidget) vsb, backgroundColour, true);
 599
 600     XtVaSetValues (hsb,
 601         XmNtroughColor, backgroundColour.AllocColour(XtDisplay(hsb)),
 602         NULL);
 603     XtVaSetValues (vsb,
 604         XmNtroughColor, backgroundColour.AllocColour(XtDisplay(vsb)),
 605         NULL);
 606
 607     // MBN: why change parent's background? It looks really ugly.
 608     // wxDoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, true);
 609 }
 610
 611 void wxListBox::ChangeForegroundColour()
 612 {
 613     wxWindow::ChangeForegroundColour();
 614
 615     Widget parent = XtParent ((Widget) m_mainWidget);
 616     Widget hsb, vsb;
 617
 618     XtVaGetValues(parent,
 619                   XmNhorizontalScrollBar, &hsb,
 620                   XmNverticalScrollBar, &vsb,
 621                   NULL);
 622
 623     /* TODO: should scrollbars be affected? Should probably have separate
 624              function to change them (by default, taken from wxSystemSettings)
 625
 626         wxDoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 627         wxDoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 628         wxDoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 629     */
 630 }
 631
 632 unsigned int wxListBox::GetCount() const
 633 {
 634     return m_noItems;
 635 }
 636
 637 #define LIST_SCROLL_SPACING 6
 638
 639 wxSize wxDoGetListBoxBestSize( Widget listWidget, const wxWindow* window )
 640 {
 641     int max;
 642     Dimension spacing, highlight, xmargin, ymargin, shadow;
 643     int width = 0;
 644     int x, y;
 645
 646     XtVaGetValues( listWidget,
 647                    XmNitemCount, &max,
 648                    XmNlistSpacing, &spacing,
 649                    XmNhighlightThickness, &highlight,
 650                    XmNlistMarginWidth, &xmargin,
 651                    XmNlistMarginHeight, &ymargin,
 652                    XmNshadowThickness, &shadow,
 653                    NULL );
 654
 655     for( size_t i = 0; i < (size_t)max; ++i )
 656     {
 657         window->GetTextExtent( wxDoGetStringInList( listWidget, i ), &x, &y );
 658         width = wxMax( width, x );
 659     }
 660
 661     // use some arbitrary value if there are no strings
 662     if( width == 0 )
 663         width = 100;
 664
 665     // get my
 666     window->GetTextExtent( "v", &x, &y );
 667
 668     // make it a little larger than widest string, plus the scrollbar
 669     width += wxSystemSettings::GetMetric( wxSYS_VSCROLL_X )
 670         + 2 * highlight + LIST_SCROLL_SPACING + 2 * xmargin + 2 * shadow;
 671
 672     // at least 3 items, at most 10
 673     int height = wxMax( 3, wxMin( 10, max ) ) *
 674         ( y + spacing + 2 * highlight ) + 2 * ymargin + 2 * shadow;
 675
 676     return wxSize( width, height );
 677 }
 678
 679 wxSize wxListBox::DoGetBestSize() const
 680 {
 681     return wxDoGetListBoxBestSize( (Widget)m_mainWidget, this );
 682 }
 683
 684 #endif // wxUSE_LISTBOX