src/common/lboxcmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/lboxcmn.cpp
   3 // Purpose:     wxListBox class methods common to all platforms
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     22.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_LISTBOX
  28
  29 #include "wx/listbox.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/dynarray.h"
  33     #include "wx/arrstr.h"
  34 #endif
  35
  36 #include "wx/log.h"
  37
  38 // ============================================================================
  39 // implementation
  40 // ============================================================================
  41
  42 wxListBoxBase::~wxListBoxBase()
  43 {
  44     // this destructor is required for Darwin
  45 }
  46
  47 // ----------------------------------------------------------------------------
  48 // selection
  49 // ----------------------------------------------------------------------------
  50
  51 bool wxListBoxBase::SetStringSelection(const wxString& s, bool select)
  52 {
  53     const int sel = FindString(s);
  54     if ( sel == wxNOT_FOUND )
  55         return false;
  56
  57     SetSelection(sel, select);
  58
  59     return true;
  60 }
  61
  62 void wxListBoxBase::DeselectAll(int itemToLeaveSelected)
  63 {
  64     if ( HasMultipleSelection() )
  65     {
  66         wxArrayInt selections;
  67         GetSelections(selections);
  68
  69         size_t count = selections.GetCount();
  70         for ( size_t n = 0; n < count; n++ )
  71         {
  72             int item = selections[n];
  73             if ( item != itemToLeaveSelected )
  74                 Deselect(item);
  75         }
  76     }
  77     else // single selection
  78     {
  79         int sel = GetSelection();
  80         if ( sel != wxNOT_FOUND && sel != itemToLeaveSelected )
  81         {
  82             Deselect(sel);
  83         }
  84     }
  85 }
  86
  87 void wxListBoxBase::UpdateOldSelections()
  88 {
  89     if (HasFlag(wxLB_MULTIPLE) || HasFlag(wxLB_EXTENDED))
  90         GetSelections( m_oldSelections );
  91 }
  92
  93 bool wxListBoxBase::SendEvent(wxEventType evtType, int item, bool selected)
  94 {
  95     wxCommandEvent event(evtType, GetId());
  96     event.SetEventObject(this);
  97
  98     event.SetInt(item);
  99     event.SetString(GetString(item));
 100     event.SetExtraLong(selected);
 101
 102     if ( HasClientObjectData() )
 103         event.SetClientObject(GetClientObject(item));
 104     else if ( HasClientUntypedData() )
 105         event.SetClientData(GetClientData(item));
 106
 107     return HandleWindowEvent(event);
 108 }
 109
 110 bool wxListBoxBase::CalcAndSendEvent()
 111 {
 112     wxArrayInt selections;
 113     GetSelections(selections);
 114     bool selected = true;
 115
 116     if ( selections.empty() && m_oldSelections.empty() )
 117     {
 118         // nothing changed, just leave
 119         return false;
 120     }
 121
 122     const size_t countSel = selections.size(),
 123                  countSelOld = m_oldSelections.size();
 124     if ( countSel == countSelOld )
 125     {
 126         bool changed = false;
 127         for ( size_t idx = 0; idx < countSel; idx++ )
 128         {
 129             if (selections[idx] != m_oldSelections[idx])
 130             {
 131                 changed = true;
 132                 break;
 133             }
 134         }
 135
 136         // nothing changed, just leave
 137         if ( !changed )
 138            return false;
 139     }
 140
 141     int item = wxNOT_FOUND;
 142     if ( selections.empty() )
 143     {
 144         selected = false;
 145         item = m_oldSelections[0];
 146     }
 147     else // we [still] have some selections
 148     {
 149         // Now test if any new item is selected
 150         bool any_new_selected = false;
 151         for ( size_t idx = 0; idx < countSel; idx++ )
 152         {
 153             item = selections[idx];
 154             if ( m_oldSelections.Index(item) == wxNOT_FOUND )
 155             {
 156                 any_new_selected = true;
 157                 break;
 158             }
 159         }
 160
 161         if ( !any_new_selected )
 162         {
 163             // No new items selected, now test if any new item is deselected
 164             bool any_new_deselected = false;
 165             for ( size_t idx = 0; idx < countSelOld; idx++ )
 166             {
 167                 item = m_oldSelections[idx];
 168                 if ( selections.Index(item) == wxNOT_FOUND )
 169                 {
 170                     any_new_deselected = true;
 171                     break;
 172                 }
 173             }
 174
 175             if ( any_new_deselected )
 176             {
 177                 // indicate that this is a selection
 178                 selected = false;
 179             }
 180             else
 181             {
 182                 item = wxNOT_FOUND; // this should be impossible
 183             }
 184         }
 185     }
 186
 187     wxASSERT_MSG( item != wxNOT_FOUND,
 188                   "Logic error in wxListBox selection event generation code" );
 189
 190     m_oldSelections = selections;
 191
 192     return SendEvent(wxEVT_COMMAND_LISTBOX_SELECTED, item, selected);
 193 }
 194
 195 // ----------------------------------------------------------------------------
 196 // misc
 197 // ----------------------------------------------------------------------------
 198
 199 void wxListBoxBase::Command(wxCommandEvent& event)
 200 {
 201     SetSelection(event.GetInt(), event.GetExtraLong() != 0);
 202     (void)GetEventHandler()->ProcessEvent(event);
 203 }
 204
 205 // ----------------------------------------------------------------------------
 206 // SetFirstItem() and such
 207 // ----------------------------------------------------------------------------
 208
 209 void wxListBoxBase::SetFirstItem(const wxString& s)
 210 {
 211     int n = FindString(s);
 212
 213     wxCHECK_RET( n != wxNOT_FOUND, wxT("invalid string in wxListBox::SetFirstItem") );
 214
 215     DoSetFirstItem(n);
 216 }
 217
 218 void wxListBoxBase::AppendAndEnsureVisible(const wxString& s)
 219 {
 220     Append(s);
 221     EnsureVisible(GetCount() - 1);
 222 }
 223
 224 void wxListBoxBase::EnsureVisible(int WXUNUSED(n))
 225 {
 226     // the base class version does nothing (the only alternative would be to
 227     // call SetFirstItem() but this is probably even more stupid)
 228 }
 229
 230 #endif // wxUSE_LISTBOX