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 // ============================================================================
  37 // implementation
  38 // ============================================================================
  39
  40 wxListBoxBase::~wxListBoxBase()
  41 {
  42     // this destructor is required for Darwin
  43 }
  44
  45 // ----------------------------------------------------------------------------
  46 // selection
  47 // ----------------------------------------------------------------------------
  48
  49 bool wxListBoxBase::SetStringSelection(const wxString& s, bool select)
  50 {
  51     const int sel = FindString(s);
  52     if ( sel == wxNOT_FOUND )
  53         return false;
  54
  55     SetSelection(sel, select);
  56
  57     return true;
  58 }
  59
  60 void wxListBoxBase::DeselectAll(int itemToLeaveSelected)
  61 {
  62     if ( HasMultipleSelection() )
  63     {
  64         wxArrayInt selections;
  65         GetSelections(selections);
  66
  67         size_t count = selections.GetCount();
  68         for ( size_t n = 0; n < count; n++ )
  69         {
  70             int item = selections[n];
  71             if ( item != itemToLeaveSelected )
  72                 Deselect(item);
  73         }
  74     }
  75     else // single selection
  76     {
  77         int sel = GetSelection();
  78         if ( sel != wxNOT_FOUND && sel != itemToLeaveSelected )
  79         {
  80             Deselect(sel);
  81         }
  82     }
  83 }
  84
  85 void wxListBoxBase::UpdateOldSelections()
  86 {
  87     if (HasFlag(wxLB_MULTIPLE) || HasFlag(wxLB_EXTENDED))
  88         GetSelections( m_oldSelections );
  89 }
  90
  91 static void LBSendEvent( wxCommandEvent &event, wxListBoxBase *listbox, int item )
  92 {
  93     event.SetInt( item );
  94     event.SetString( listbox->GetString( item ) );
  95     if ( listbox->HasClientObjectData() )
  96         event.SetClientObject( listbox->GetClientObject(item) );
  97     else if ( listbox->HasClientUntypedData() )
  98         event.SetClientData( listbox->GetClientData(item) );
  99     listbox->HandleWindowEvent( event );
 100 }
 101
 102 void wxListBoxBase::CalcAndSendEvent()
 103 {
 104     wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, GetId() );
 105     event.SetEventObject( this );
 106
 107     wxArrayInt selections;
 108     GetSelections( selections );
 109
 110         if ((selections.GetCount() == 0) && (m_oldSelections.GetCount() == 0))
 111         {
 112             // nothing changed, just leave
 113             return;
 114         }
 115
 116         if (selections.GetCount() == m_oldSelections.GetCount())
 117         {
 118             bool changed = false;
 119             size_t idx;
 120             for (idx = 0; idx < selections.GetCount(); idx++)
 121             {
 122                 if (selections[idx] != m_oldSelections[idx])
 123                 {
 124                     changed = true;
 125                     break;
 126                 }
 127             }
 128
 129             // nothing changed, just leave
 130             if (!changed)
 131                return;
 132         }
 133
 134         if (selections.GetCount() == 0)
 135         {
 136             // indicate that this is a deselection
 137             event.SetExtraLong( 0 );
 138             int item = m_oldSelections[0];
 139             m_oldSelections = selections;
 140             LBSendEvent( event, this, item );
 141             return;
 142         }
 143
 144         int item;
 145         // Now test if any new item is selected
 146         bool any_new_selected = false;
 147         size_t idx;
 148         for (idx = 0; idx < selections.GetCount(); idx++)
 149         {
 150             item = selections[idx];
 151             if (m_oldSelections.Index(item) == wxNOT_FOUND)
 152             {
 153                 any_new_selected = true;
 154                 break;
 155             }
 156         }
 157
 158         if (any_new_selected)
 159         {
 160             // indicate that this is a selection
 161             event.SetExtraLong( 1 );
 162             m_oldSelections = selections;
 163             LBSendEvent( event, this, item );
 164             return;
 165         }
 166
 167         // Now test if any new item is deselected
 168         bool any_new_deselected = false;
 169         for (idx = 0; idx < m_oldSelections.GetCount(); idx++)
 170         {
 171             item = m_oldSelections[idx];
 172             if (selections.Index(item) == wxNOT_FOUND)
 173             {
 174                 any_new_deselected = true;
 175                 break;
 176             }
 177         }
 178
 179         if (any_new_deselected)
 180         {
 181             // indicate that this is a selection
 182             event.SetExtraLong( 0 );
 183             m_oldSelections = selections;
 184             LBSendEvent( event, this, item );
 185             return;
 186         }
 187
 188         wxLogError( wxT("Wrong wxListBox selection") );
 189 }
 190
 191 // ----------------------------------------------------------------------------
 192 // misc
 193 // ----------------------------------------------------------------------------
 194
 195 void wxListBoxBase::Command(wxCommandEvent& event)
 196 {
 197     SetSelection(event.GetInt(), event.GetExtraLong() != 0);
 198     (void)ProcessEvent(event);
 199 }
 200
 201 // ----------------------------------------------------------------------------
 202 // SetFirstItem() and such
 203 // ----------------------------------------------------------------------------
 204
 205 void wxListBoxBase::SetFirstItem(const wxString& s)
 206 {
 207     int n = FindString(s);
 208
 209     wxCHECK_RET( n != wxNOT_FOUND, wxT("invalid string in wxListBox::SetFirstItem") );
 210
 211     DoSetFirstItem(n);
 212 }
 213
 214 void wxListBoxBase::AppendAndEnsureVisible(const wxString& s)
 215 {
 216     Append(s);
 217     EnsureVisible(GetCount() - 1);
 218 }
 219
 220 void wxListBoxBase::EnsureVisible(int WXUNUSED(n))
 221 {
 222     // the base class version does nothing (the only alternative would be to
 223     // call SetFirstItem() but this is probably even more stupid)
 224 }
 225
 226 #endif // wxUSE_LISTBOX