void SiteRDEControl_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
var site = DataContext as RDESiteViewModel;
if (site != null)
{
if (_currentSite != null)
{
// although the database actions are registered for new/modified traits, we need to keep track of them so we can
// redisplay them as the user flips around the different sites.
_currentSite.Traits = _traits.GetModel();
}
_traits.BindModel(site.Traits, site);
_currentSite = site;
// There is a datacontext change cascade problem here.
// When the RDE frame advances/retreats its first changes the data context on the various RDE Panels (this one included)
// but our downstream dependents have yet to have their datacontexts changed (e.g. the position control, and it's descendants
// still point to the old site). This means when we clear the control (several lines down), it was actually clearing the old site as well as the control
// text boxes. So the datacontext for the position control is explicitly set here so that it is correctly bound to the new site
// when it is cleared.
// NOTE: have tried dispatching the call (kind of like invokeLater) and it didn't work.
ctlPosition.DataContext = site;
if (!site.Latitude.HasValue || !site.Longitude.HasValue || (site.Latitude.Value == 0 && site.Longitude.Value == 0))
{
ctlPosition.Clear();
}
}
}
void MaterialRDEControl_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
var mat = DataContext as RDEMaterialViewModel;
if (mat != null)
{
this.IsEnabled = true;
if (_currentMaterial != null)
{
// although the database actions are registered for new/modified traits, we need to keep track of them so we can
// redisplay them as the user flips around the different material.
_currentMaterial.Traits = _traits.GetModel();
_currentMaterial.Multimedia = _multimedia.GetModel();
}
_traits.BindModel(mat.Traits, mat);
_currentMaterial = mat;
_multimedia.BindModel(mat.Multimedia, mat);
grpSubParts.Items = _currentMaterial.SubParts;
_subpartsFull.SetModel(_currentMaterial, _currentMaterial.SubParts);
_associates.SetModel(_currentMaterial, _currentMaterial.Associates);
}
else
{
this.IsEnabled = false;
}
}