C++ wxDataViewItemArray::GetCount方法代码示例

void MyListModel::DeleteItems( const wxDataViewItemArray &items )
{
    unsigned i;
    wxArrayInt rows;
    for (i = 0; i < items.GetCount(); i++)
    {
        unsigned int row = GetRow( items[i] );
        if (row < m_textColValues.GetCount())
            rows.Add( row );
    }

    if (rows.GetCount() == 0)
    {
        // none of the selected items were in the range of the items
        // which we store... for simplicity, don't allow removing them
        wxLogError( "Cannot remove rows with an index greater than %d", m_textColValues.GetCount() );
        return;
    }

    // Sort in descending order so that the last
    // row will be deleted first. Otherwise the
    // remaining indeces would all be wrong.
    rows.Sort( my_sort_reverse );
    for (i = 0; i < rows.GetCount(); i++)
        m_textColValues.RemoveAt( rows[i] );

    // This is just to test if wxDataViewCtrl can
    // cope with removing rows not sorted in
    // descending order
    rows.Sort( my_sort );
    RowsDeleted( rows );
}

void wxDataViewCtrl::SetSelections(wxDataViewItemArray const& sel)
{
    size_t const noOfSelections = sel.GetCount();

    size_t i;

    wxDataViewItem last_parent;


   // make sure that all to be selected items are visible in the control:
    for (i = 0; i < noOfSelections; i++)
    {
        wxDataViewItem item   = sel[i];
        wxDataViewItem parent = GetModel()->GetParent( item );

        if (parent.IsOk() && (parent != last_parent))
          ExpandAncestors(item);
        last_parent = parent;
    }

   // finally select the items:
    wxDataViewWidgetImpl* dataViewWidgetPtr(GetDataViewPeer()); // variable definition for abbreviational purposes

    for (i=0; i<noOfSelections; ++i)
      dataViewWidgetPtr->Select(sel[i]);
}

void wxOSXDataViewModelNotifier::AdjustRowHeights(wxDataViewItemArray const& items)
{
  if ((m_DataViewCtrlPtr->GetWindowStyle() & wxDV_VARIABLE_LINE_HEIGHT) != 0)
  {
      size_t const noOfItems = items.GetCount();

      wxDataViewModel *model = GetOwner();

      for (size_t itemIndex=0; itemIndex<noOfItems; ++itemIndex)
      {
        int height = 20; // TODO find out standard height
        unsigned int num = m_DataViewCtrlPtr->GetColumnCount();
        unsigned int col;

        for (col = 0; col < num; col++)
        {
            wxDataViewColumn* column(m_DataViewCtrlPtr->GetColumnPtr(col));

            if (!(column->IsHidden()))
            {
              wxDataViewCustomRenderer *renderer = dynamic_cast<wxDataViewCustomRenderer*>(column->GetRenderer());
              if (renderer)
              {
                  wxVariant value;
                  model->GetValue( value, items[itemIndex], column->GetModelColumn() );
                  renderer->SetValue( value );
                  height = wxMax( height, renderer->GetSize().y );
              }
            }
        }
        if (height > 20)
          m_DataViewCtrlPtr->GetDataViewPeer()->SetRowHeight(items[itemIndex],height);
      }
  }
}

void CTimeBarListModel::DeleteItems( const wxDataViewItemArray &items )
{
    wxArrayInt rows;
    for (unsigned i = 0; i < items.GetCount(); i++)
    {
        unsigned int row = GetRow( items[i] );
        if (row < m_textColValues.GetCount())
            rows.Add( row );
    }

    if (rows.GetCount() > 0)
    {
        // Sort in descending order so that the last
        // row will be deleted first. Otherwise the
        // remaining indeces would all be wrong.
        rows.Sort([](int *v1, int *v2)
        {
            return *v2-*v1;
        });
        for (unsigned i = 0; i < rows.GetCount(); i++)
        {
            m_textColValues.RemoveAt( rows[i] );
            m_view.RemoveAt( rows[i] );
            m_lock.RemoveAt( rows[i] );
        }
        // This is just to test if wxDataViewCtrl can
        // cope with removing rows not sorted in
        // descending order
        rows.Sort([](int *v1, int *v2)
        {
            return *v1-*v2;
        });
        RowsDeleted( rows );
    }
}

void TreeListModel::DeleteItems(const wxDataViewItem& parent, const wxDataViewItemArray& items)
{
    // sanity
    for(size_t i=0; i<items.GetCount(); ++i) {
        TreeListModel_Item* node = reinterpret_cast<TreeListModel_Item*>(items.Item(i).m_pItem);
        wxUnusedVar(node);
        wxASSERT(node && node->GetParent() == parent.m_pItem);
        DeleteItem(items.Item(i));
    }
}

unsigned int TreeListModel::GetChildren(const wxDataViewItem& item, wxDataViewItemArray& children) const
{
    if(item.GetID() == NULL) {
        // Root
        for(size_t i=0; i<m_data.size(); ++i) {
            children.Add( wxDataViewItem( m_data.at(i) ) );
        }
        return children.size();
    }

    children.Clear();
    TreeListModel_Item* node = reinterpret_cast<TreeListModel_Item*>(item.m_pItem);
    if ( node ) {
        for(size_t i=0; i<node->GetChildren().size(); ++i) {
            children.Add( wxDataViewItem( node->GetChildren().at(i) ) );
        }
    }
    return children.GetCount();
}

bool wxOSXDataViewModelNotifier::ItemsChanged(wxDataViewItemArray const& items)
{
  size_t const noOfItems = items.GetCount();

  wxDataViewEvent dataViewEvent(wxEVT_COMMAND_DATAVIEW_ITEM_VALUE_CHANGED,m_DataViewCtrlPtr->GetId());


  dataViewEvent.SetEventObject(m_DataViewCtrlPtr);
  for (size_t indexItem=0; indexItem<noOfItems; ++indexItem)
    if (m_DataViewCtrlPtr->GetDataViewPeer()->Update(GetOwner()->GetParent(items[indexItem]),items[indexItem]))
    {
     // send for all changed items a wxWidget event:
      dataViewEvent.SetItem(items[indexItem]);
      m_DataViewCtrlPtr->HandleWindowEvent(dataViewEvent);
    }
    else
      return false;
 // if this location is reached all items have been updated:
  AdjustRowHeights(items);
  AdjustAutosizedColumns();
 // done:
  return true;
}