protected void RaiseExpanded(ExpandCollapseEventArgs e)
{
if (this.Expanded != null)
{
this.Expanded(this, e);
}
}
private void OnCollapsed(object sender, Telerik.Data.Core.Layouts.ExpandCollapseEventArgs e)
{
// NOTE: Consider removing this code for better performance once we use more complex IndexTree with nested IndexTrees for every Group.
// This way we won't need to update the index tree on Expand/Collapse.
int end = e.StartSlot + e.SlotsCount;
for (int i = e.StartSlot; i < end; i++)
{
this.Layout.RenderInfo.Update(i, 0);
}
this.owner.InvalidateCellsPanelMeasure();
}
private void OnExpanded(object sender, Telerik.Data.Core.Layouts.ExpandCollapseEventArgs e)
{
// NOTE: Consider removing this code for better performance once we use more complex IndexTree with nested IndexTrees for every Group.
// This way we won't need to update the index tree on Expand/Collapse operation and we won't have to use GetNextVisible method.
int end = e.StartSlot + e.SlotsCount;
for (int i = e.StartSlot; i < end; i = this.layout.GetNextVisibleSlot(i))
{
this.Layout.RenderInfo.Update(i, this.isHorizontal ? GridModel.DefaultColumnWidth : GridModel.DefaultRowHeight);
}
// Gets the length up to (including) the index of expanded item.
var physicalOffset = this.Layout.RenderInfo.ValueForIndex(e.StartSlot - 1);
this.owner.InvalidateCellsPanelMeasure();
}