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 void RefreshDefaultScrollTipContentTemplate()
{
DataGridContext itemContext = DataGridControl.GetDataGridContext(this);
if (itemContext == null)
{
return;
}
DataGridControl parentGridControl = itemContext.DataGridControl;
if ((parentGridControl == null) || (parentGridControl.ScrollViewer == null))
{
return;
}
ColumnCollection columnCollection = itemContext.Columns;
if (columnCollection == null)
{
return;
}
Column mainColumn = columnCollection.MainColumn as Column;
if (mainColumn == null)
{
return;
}
Nequeo.Wpf.DataGrid.Views.UIViewBase uiViewBase = parentGridControl.GetView() as Nequeo.Wpf.DataGrid.Views.UIViewBase;
if (uiViewBase == null)
{
return;
}
// The ScrollTip.ContentTemplate will now be set. This is to avoid
// a null ContentTemplate when the ColumnsCollection update its
// MainColumn after the template is applied
this.ScrollTipContentTemplateNeedsRefresh = false;
ForeignKeyConfiguration configuration = mainColumn.ForeignKeyConfiguration;
// Do not create default template only when none was created before and a template already exists
if ((!this.UsingDefaultScrollTipContentTemplate) && (uiViewBase.ScrollTipContentTemplate != null))
{
if (configuration != null)
{
this.ContentTemplate = configuration.DefaultScrollTipContentTemplate;
}
else
{
// Clear the value in case we previously affected it
this.ClearValue(ScrollTip.ContentTemplateProperty);
// Set the default Binding values
this.SetBinding(ScrollTip.ContentTemplateProperty, this.DefaultScrollTipContentTemplateBinding);
this.SetBinding(ScrollTip.ContentTemplateSelectorProperty, this.DefaultScrollTipContentTemplateSelectorBinding);
}
}
else
{
// A default ContentTemplate template is created using MainColumn as displayed data
this.UsingDefaultScrollTipContentTemplate = true;
// If a configuration was found, the default ContentTemplate will
// be used to convert Content to Foreign value and
// it will use the ScrollTipContentTemplate defined on UIViewBase
// if any
if (configuration == null)
{
// Disable warning for DisplayMemberBinding when internaly used
#pragma warning disable 618
BindingBase displayMemberBinding = mainColumn.DisplayMemberBinding;
#pragma warning restore 618
FrameworkElementFactory contentPresenter = new FrameworkElementFactory(typeof(ContentPresenter));
contentPresenter.SetValue(ContentPresenter.NameProperty, "defaultScrollTipDataTemplateContentPresenter");
contentPresenter.SetBinding(ContentPresenter.ContentProperty, displayMemberBinding);
contentPresenter.SetBinding(ContentPresenter.ContentTemplateProperty, this.DefaultCellContentTemplateBinding);
contentPresenter.SetBinding(ContentPresenter.ContentTemplateSelectorProperty, this.DefaultCellContentTemplateSelectorBinding);
DataTemplate template = new DataTemplate();
template.VisualTree = contentPresenter;
template.Seal();
this.ContentTemplate = template;
}
else
{
this.SetBinding(ContentPresenter.ContentTemplateProperty, this.DefaultCellContentTemplateBinding);
this.SetBinding(ContentPresenter.ContentTemplateSelectorProperty, this.DefaultCellContentTemplateSelectorBinding);
this.ContentTemplate = configuration.DefaultScrollTipContentTemplate;
}
}
}