/// -----------------------------------------------------------------------------------
/// <summary>
/// Notifies the site that something about the selection has changed.
/// </summary>
/// <param name="prootb"></param>
/// <param name="vwselNew">Selection</param>
/// <remarks>When overriding you should call the base class first.</remarks>
/// -----------------------------------------------------------------------------------
protected override void HandleSelectionChange(IVwRootBox prootb, IVwSelection vwselNew)
{
CheckDisposed();
base.HandleSelectionChange(prootb, vwselNew);
if (vwselNew == null)
{
return;
}
int clev = vwselNew.CLevels(false); // anchor
int clevEnd = vwselNew.CLevels(true);
if (clev < 2 || clevEnd < 2)
{
return; // paranoia
}
int hvoRoot, tag, ihvo, ihvoEnd, cpropPrevious;
IVwPropertyStore vps;
vwselNew.PropInfo(true, clevEnd - 1, out hvoRoot, out tag, out ihvoEnd,
out cpropPrevious, out vps);
vwselNew.PropInfo(false, clev - 1, out hvoRoot, out tag, out ihvo,
out cpropPrevious, out vps);
// Give up if the selection doesn't indicate any top-level object; I think this can happen with pictures.
// selection larger than a top-level object, maybe select all, side effects are confusing.
if (ihvo != ihvoEnd || ihvo < 0)
{
return;
}
if (hvoRoot == 0)
{
return;
}
Debug.Assert(hvoRoot == m_hvoRoot);
int hvoObjNewSel = m_sdaSource.get_VecItem(hvoRoot, tag, ihvo);
if (hvoObjNewSel != 0)
{
// Notify any delegates that the selection of the main object in the vector
// may have changed.
if (SelectionChangedEvent != null)
{
SelectionChangedEvent(this, new FwObjectSelectionEventArgs(hvoObjNewSel, ihvo));
}
}
}