+void wxListBoxBase::UpdateOldSelections()
+{
+ // When the control becomes empty, any previously remembered selections are
+ // invalid anyhow, so just forget them.
+ if ( IsEmpty() )
+ {
+ m_oldSelections.clear();
+ return;
+ }
+
+ // We need to remember the selection even in single-selection case on
+ // Windows, so that we don't send an event when the user clicks on an
+ // already selected item.
+#ifndef __WXMSW__
+ if (HasFlag(wxLB_MULTIPLE) || HasFlag(wxLB_EXTENDED))
+#endif
+ {
+ GetSelections( m_oldSelections );
+ }
+}
+
+bool wxListBoxBase::SendEvent(wxEventType evtType, int item, bool selected)
+{
+ wxCommandEvent event(evtType, GetId());
+ event.SetEventObject(this);
+
+ event.SetInt(item);
+ event.SetString(GetString(item));
+ event.SetExtraLong(selected);
+
+ if ( HasClientObjectData() )
+ event.SetClientObject(GetClientObject(item));
+ else if ( HasClientUntypedData() )
+ event.SetClientData(GetClientData(item));
+
+ return HandleWindowEvent(event);
+}
+
+bool wxListBoxBase::DoChangeSingleSelection(int item)
+{
+ // As we don't use m_oldSelections in single selection mode, we store the
+ // last item that we notified the user about in it in this case because we
+ // need to remember it to be able to filter out the dummy selection changes
+ // that we get when the user clicks on an already selected item.
+ if ( !m_oldSelections.empty() && *m_oldSelections.begin() == item )
+ {
+ // Same item as the last time.
+ return false;
+ }
+
+ m_oldSelections.clear();
+ m_oldSelections.push_back(item);
+
+ return true;
+}
+
+bool wxListBoxBase::CalcAndSendEvent()
+{
+ wxArrayInt selections;
+ GetSelections(selections);
+ bool selected = true;
+
+ if ( selections.empty() && m_oldSelections.empty() )
+ {
+ // nothing changed, just leave
+ return false;
+ }
+
+ const size_t countSel = selections.size(),
+ countSelOld = m_oldSelections.size();
+ if ( countSel == countSelOld )
+ {
+ bool changed = false;
+ for ( size_t idx = 0; idx < countSel; idx++ )
+ {
+ if (selections[idx] != m_oldSelections[idx])
+ {
+ changed = true;
+ break;
+ }
+ }
+
+ // nothing changed, just leave
+ if ( !changed )
+ return false;
+ }
+
+ int item = wxNOT_FOUND;
+ if ( selections.empty() )
+ {
+ selected = false;
+ item = m_oldSelections[0];
+ }
+ else // we [still] have some selections
+ {
+ // Now test if any new item is selected
+ bool any_new_selected = false;
+ for ( size_t idx = 0; idx < countSel; idx++ )
+ {
+ item = selections[idx];
+ if ( m_oldSelections.Index(item) == wxNOT_FOUND )
+ {
+ any_new_selected = true;
+ break;
+ }
+ }
+
+ if ( !any_new_selected )
+ {
+ // No new items selected, now test if any new item is deselected
+ bool any_new_deselected = false;
+ for ( size_t idx = 0; idx < countSelOld; idx++ )
+ {
+ item = m_oldSelections[idx];
+ if ( selections.Index(item) == wxNOT_FOUND )
+ {
+ any_new_deselected = true;
+ break;
+ }
+ }
+
+ if ( any_new_deselected )
+ {
+ // indicate that this is a selection
+ selected = false;
+ }
+ else
+ {
+ item = wxNOT_FOUND; // this should be impossible
+ }
+ }
+ }
+
+ wxASSERT_MSG( item != wxNOT_FOUND,
+ "Logic error in wxListBox selection event generation code" );
+
+ m_oldSelections = selections;
+
+ return SendEvent(wxEVT_LISTBOX, item, selected);
+}
+
projects / wxWidgets.git / blobdiff