public void Visit(DataGridContext sourceContext, int sourceDataItemIndex, object item, ref bool stopVisit)
{
if (!m_isTableFlowView)
{
m_item = item;
m_parentDataGridContext = sourceContext;
m_success = true;
stopVisit = true;
return;
}
UIElement dataRow = sourceContext.CustomItemContainerGenerator.ContainerFromItem(item) as UIElement;
if (dataRow != null)
{
if (!ScrollTip.IsItemInView(dataRow, sourceContext.DataGridControl.ItemsHost))
{
stopVisit = true;
}
else if (!ScrollTip.IsDataItemHiddenBySticky(sourceContext, item))
{
m_item = item;
m_parentDataGridContext = sourceContext;
m_success = true;
stopVisit = true;
}
}
}
private static void ParentGridControlPropertyChangedCallback(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
DataGridControl oldParentGridControl = e.OldValue as DataGridControl;
DataGridControl parentGridControl = e.NewValue as DataGridControl;
ScrollTip scrollTip = sender as ScrollTip;
scrollTip.IsInParentGridChanged = true;
try
{
if (oldParentGridControl != null)
{
if (scrollTip.UsingDefaultScrollTipContentTemplate)
{
// Unload DefaultTemplate
Nequeo.Wpf.DataGrid.Views.UIViewBase uiViewBase = oldParentGridControl.GetView() as Nequeo.Wpf.DataGrid.Views.UIViewBase;
if (uiViewBase != null)
{
uiViewBase.ClearValue(UIViewBase.ScrollTipContentTemplateProperty);
scrollTip.UsingDefaultScrollTipContentTemplate = false;
}
}
if (scrollTip.m_mainColumn != null)
{
PropertyChangedEventManager.RemoveListener(scrollTip.m_mainColumn, scrollTip, "DisplayMemberBinding");
}
scrollTip.m_mainColumn = null;
scrollTip.UnregisterListeners(oldParentGridControl);
}
if (parentGridControl == null)
{
return;
}
scrollTip.PrepareDefaultStyleKey(parentGridControl.GetView());
// Assert Template is applied in order to be notified for ScrollBars events
DataGridControl.SetDataGridContext(scrollTip, parentGridControl.DataGridContext);
if (!scrollTip.ApplyTemplate())
{
scrollTip.RefreshDefaultScrollTipContentTemplate();
}
scrollTip.RegisterListeners(parentGridControl);
}
finally
{
scrollTip.IsInParentGridChanged = false;
}
}
private static void OnDataGridContextPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
ScrollTip scrollTip = ( ScrollTip )sender;
DataGridContext oldItemContext = e.OldValue as DataGridContext;
DataGridContext newItemContext = e.NewValue as DataGridContext;
if (scrollTip.m_mainColumn != null)
{
PropertyChangedEventManager.RemoveListener(scrollTip.m_mainColumn, scrollTip, "DisplayMemberBinding");
}
scrollTip.m_mainColumn = null;
if (oldItemContext != null)
{
PropertyChangedEventManager.RemoveListener(oldItemContext.Columns, scrollTip, "MainColumn");
}
scrollTip.ClearValue(ScrollTip.ContentProperty);
if (newItemContext != null)
{
scrollTip.m_mainColumn = newItemContext.Columns.MainColumn;
if (scrollTip.m_mainColumn != null)
{
PropertyChangedEventManager.AddListener(scrollTip.m_mainColumn, scrollTip, "DisplayMemberBinding");
}
PropertyChangedEventManager.AddListener(newItemContext.Columns, scrollTip, "MainColumn");
}
if (!scrollTip.IsInParentGridChanged)
{
if (!scrollTip.ApplyTemplate())
{
scrollTip.RefreshDefaultScrollTipContentTemplate();
}
}
}
