|
private RestorePreviousSelection ( IEnumerable |
||
| selectedGraphics | IEnumerable |
|
| return | void | |
private static void OnFilterSourcePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FeatureDataGrid grid = d as FeatureDataGrid;
IEnumerable <Graphic> oldValue = e.OldValue as IEnumerable <Graphic>;
IEnumerable <Graphic> newValue = e.NewValue as IEnumerable <Graphic>;
if (oldValue != null && oldValue is ObservableCollection <Graphic> )
{
(oldValue as ObservableCollection <Graphic>).CollectionChanged -= grid.FilterSource_CollectionChanged;
}
if (newValue != null && newValue is ObservableCollection <Graphic> )
{
(newValue as ObservableCollection <Graphic>).CollectionChanged += grid.FilterSource_CollectionChanged;
}
if (grid.GraphicsLayer != null)
{
grid.SetItemsSource((grid.GraphicsLayer != null && grid.GraphicsLayer.Graphics != null) ? (IList <Graphic>)grid.GraphicsLayer.Graphics : new List <Graphic>());
}
else
{
grid.ItemsSource = null;
}
grid.ResetLayout();
// Restoring previously selected graphics (if any):
if (grid.GraphicsLayer != null)
{
grid.RestorePreviousSelection(grid.GraphicsLayer.SelectedGraphics);
}
}
private static void OnGraphicsLayerPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FeatureDataGrid grid = d as FeatureDataGrid;
GraphicsLayer oldValue = e.OldValue as GraphicsLayer;
GraphicsLayer newValue = e.NewValue as GraphicsLayer;
if (oldValue != null)
{
oldValue.PropertyChanged -= grid.GraphicsLayer_PropertyChanged;
#region Mouse Hovering Support
oldValue.MouseEnter -= grid.GraphicsLayer_MouseEnter;
oldValue.MouseLeave -= grid.GraphicsLayer_MouseLeave;
#endregion
grid.UnregisterGraphicCollectionEventHandlers();
grid.currentGraphicCollection = null;
// Setting the FeatureDataGrid's ItemsSource property to null:
grid.ItemsSource = null;
grid.ResetLayout();
}
if (newValue != null)
{
#region Mouse Hovering Support
newValue.MouseEnter += grid.GraphicsLayer_MouseEnter;
newValue.MouseLeave += grid.GraphicsLayer_MouseLeave;
#endregion
if (!newValue.IsInitialized)
{
EventHandler <EventArgs> handler = null;
handler = new EventHandler <EventArgs>(
delegate(object s, EventArgs args) { grid.PopulateItemsSource(s as GraphicsLayer, handler); });
newValue.Initialized += handler;
}
else
{
grid.PopulateItemsSource(newValue, null);
}
}
// Restoring previously selected graphics (if any):
if (grid.GraphicsLayer != null)
{
grid.RestorePreviousSelection(grid.GraphicsLayer.SelectedGraphics);
}
}