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 static void LBSendEvent( wxCommandEvent &event, wxListBoxBase *listbox, int item )
  94 {
  95     event.SetInt( item );
  96     event.SetString( listbox->GetString( item ) );
  97     if ( listbox->HasClientObjectData() )
  98         event.SetClientObject( listbox->GetClientObject(item) );
  99     else if ( listbox->HasClientUntypedData() )
 100         event.SetClientData( listbox->GetClientData(item) );
 101     listbox->HandleWindowEvent( event );
 102 }
 103
 104 void wxListBoxBase::CalcAndSendEvent()
 105 {
 106     wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, GetId() );
 107     event.SetEventObject( this );
 108
 109     wxArrayInt selections;
 110     GetSelections( selections );
 111
 112         if ((selections.GetCount() == 0) && (m_oldSelections.GetCount() == 0))
 113         {
 114             // nothing changed, just leave
 115             return;
 116         }
 117
 118         if (selections.GetCount() == m_oldSelections.GetCount())
 119         {
 120             bool changed = false;
 121             size_t idx;
 122             for (idx = 0; idx < selections.GetCount(); idx++)
 123             {
 124                 if (selections[idx] != m_oldSelections[idx])
 125                 {
 126                     changed = true;
 127                     break;
 128                 }
 129             }
 130
 131             // nothing changed, just leave
 132             if (!changed)
 133                return;
 134         }
 135
 136         if (selections.GetCount() == 0)
 137         {
 138             // indicate that this is a deselection
 139             event.SetExtraLong( 0 );
 140             int item = m_oldSelections[0];
 141             m_oldSelections = selections;
 142             LBSendEvent( event, this, item );
 143             return;
 144         }
 145
 146         int item;
 147         // Now test if any new item is selected
 148         bool any_new_selected = false;
 149         size_t idx;
 150         for (idx = 0; idx < selections.GetCount(); idx++)
 151         {
 152             item = selections[idx];
 153             if (m_oldSelections.Index(item) == wxNOT_FOUND)
 154             {
 155                 any_new_selected = true;
 156                 break;
 157             }
 158         }
 159
 160         if (any_new_selected)
 161         {
 162             // indicate that this is a selection
 163             event.SetExtraLong( 1 );
 164             m_oldSelections = selections;
 165             LBSendEvent( event, this, item );
 166             return;
 167         }
 168
 169         // Now test if any new item is deselected
 170         bool any_new_deselected = false;
 171         for (idx = 0; idx < m_oldSelections.GetCount(); idx++)
 172         {
 173             item = m_oldSelections[idx];
 174             if (selections.Index(item) == wxNOT_FOUND)
 175             {
 176                 any_new_deselected = true;
 177                 break;
 178             }
 179         }
 180
 181         if (any_new_deselected)
 182         {
 183             // indicate that this is a selection
 184             event.SetExtraLong( 0 );
 185             m_oldSelections = selections;
 186             LBSendEvent( event, this, item );
 187             return;
 188         }
 189
 190         wxLogError( wxT("Wrong wxListBox selection") );
 191 }
 192
 193 // ----------------------------------------------------------------------------
 194 // misc
 195 // ----------------------------------------------------------------------------
 196
 197 void wxListBoxBase::Command(wxCommandEvent& event)
 198 {
 199     SetSelection(event.GetInt(), event.GetExtraLong() != 0);
 200     (void)ProcessEvent(event);
 201 }
 202
 203 // ----------------------------------------------------------------------------
 204 // SetFirstItem() and such
 205 // ----------------------------------------------------------------------------
 206
 207 void wxListBoxBase::SetFirstItem(const wxString& s)
 208 {
 209     int n = FindString(s);
 210
 211     wxCHECK_RET( n != wxNOT_FOUND, wxT("invalid string in wxListBox::SetFirstItem") );
 212
 213     DoSetFirstItem(n);
 214 }
 215
 216 void wxListBoxBase::AppendAndEnsureVisible(const wxString& s)
 217 {
 218     Append(s);
 219     EnsureVisible(GetCount() - 1);
 220 }
 221
 222 void wxListBoxBase::EnsureVisible(int WXUNUSED(n))
 223 {
 224     // the base class version does nothing (the only alternative would be to
 225     // call SetFirstItem() but this is probably even more stupid)
 226 }
 227
 228 #endif // wxUSE_LISTBOX