/// <summary>
/// When the header control sends a notification we need to
/// process the click to sort, button click for options menu,
/// and filter change to update the items currently visible.
/// </summary>
/// <param name="h">NMHEADER</param>
private void NotifyHeaderMessage( NMHEADER h )
{
// process only specific header notification messages
switch( h.hdr.code )
{
// a header column was clicked, do the sort
case ( int )W32_HDN.HDN_ITEMCLICKA:
case ( int )W32_HDN.HDN_ITEMCLICKW:
_headerControl.SortColumn = _sortColumn = h.iItem;
_sortOrderAscending = _headerControl.SortOrder;
srt_datype = _headerControl.DataType[ _sortColumn ];
this.Sort();
SendMessage( this.Handle, W32_LVM.LVM_SETSELECTEDCOLUMN, _sortColumn, 0 );
SendMessage( this.Handle, W32_LVM.LVM_UPDATE, 0, 0 );
break;
// a filter button was clicked display the popup menu
// to handle setting filter options for the column
case ( int )W32_HDN.HDN_FILTERBTNCLICK:
_activeColumn = h.iItem;
this.filterContextMenuStrip.Show( this, PointToClient( MousePosition ) );
break;
// a filter content changed, update the items collection
case ( int )W32_HDN.HDN_FILTERCHANGE:
// if this is for item -1 then this is a clear all filters
if( h.iItem < 0 ) _filters.Clear();
// if we are filtered this is a real filter data change
else if( _showFilters ) FilterBuild( h.iItem );
// update the items array with new filters applied
FilterUpdate();
break;
}
}
public TypedColumnHeader( ColumnHeaderDataType dataType )
{
_dataType = dataType;
}