/// <summary>
/// Handles selection when the selection property such as SelectedIndex,SelectedItem and SelectionMode value changes occurred.
/// </summary>
/// <param name="handle">
/// The <see cref="Syncfusion.UI.Xaml.Grid.SelectionPropertyChangedHandlerArgs"/> that contains the corresponding property name and its value changes.
/// </param>
/// <remarks>
/// This method is invoked when the selection property values such as SelectedIndex,SelectedItem and SelectionMode are changed in SfTreeGrid.
/// </remarks>
public virtual void HandleSelectionPropertyChanges(SelectionPropertyChangedHandlerArgs handle)
{
switch (handle.PropertyName)
{
case "SelectedItem":
ProcessSelectedItemChanged(handle);
break;
case "SelectedIndex":
ProcessSelectedIndexChanged(handle);
break;
case "SelectionMode":
ProcessSelectionModeChanged(handle);
break;
case "NavigationMode":
ProcessNavigationModeChanged(handle);
break;
case "CurrentItem":
ProcessCurrentItemChanged(handle);
break;
}
}
public override void HandleSelectionPropertyChanges(SelectionPropertyChangedHandlerArgs handle)
{
if (IsSuspended || (handle.NewValue == null && handle.OldValue == null))
{
return;
}
if (TreeGrid.CheckBoxSelectionMode == CheckBoxSelectionMode.SelectOnCheck && (handle.PropertyName == "SelectedItem" || handle.PropertyName == "SelectedIndex" || handle.PropertyName == "CurrentItem"))
{
throw new InvalidOperationException("It is not possible to set selection using SelectedItem/SelectedIndex/CurrentItem programmatically when CheckBoxSelectionMode is SelectOnlyOnCheckBoxClick");
}
base.HandleSelectionPropertyChanges(handle);
}
/// <summary>
/// Processes the selection when the <see cref="Syncfusion.UI.Xaml.TreeGrid.SfTreeGrid.CurrentItem"/> property value changes.
/// </summary>
/// <param name="handle">
/// The <see cref="Syncfusion.UI.Xaml.Grid.SelectionPropertyChangedHandlerArgs"/> contains the data for the <see cref="Syncfusion.UI.Xaml.TreeGrid.SfTreeGrid.CurrentItem"/> property value changes.
/// </param>
protected internal virtual void ProcessCurrentItemChanged(SelectionPropertyChangedHandlerArgs handle)
{
}
/// <summary>
/// Processes the selection when the <see cref="Syncfusion.UI.Xaml.TreeGrid.SfTreeGrid.NavigationMode"/> property value changes.
/// </summary>
/// <param name="handle">
/// The <see cref="Syncfusion.UI.Xaml.Grid.SelectionPropertyChangedHandlerArgs"/> contains the data for the <see cref="Syncfusion.UI.Xaml.TreeGrid.SfTreeGrid.NavigationMode"/> property value changes.
/// </param>
protected virtual void ProcessNavigationModeChanged(SelectionPropertyChangedHandlerArgs handle)
{
}
/// <summary>
/// Processes the selection when the <see cref="Syncfusion.UI.Xaml.TreeGrid.SfTreeGrid.SelectedIndex"/> property value changes.
/// </summary>
/// <param name="handle">
/// The <see cref="Syncfusion.UI.Xaml.Grid.SelectionPropertyChangedHandlerArgs"/> contains the data for the <see cref="Syncfusion.UI.Xaml.TreeGrid.SfTreeGrid.SelectedIndex"/> property value changes.
/// </param>
protected internal virtual void ProcessSelectedIndexChanged(SelectionPropertyChangedHandlerArgs handle)
{
}
