/// <summary>
/// Raises the PreviewCurrentChangingEvent without allowing canceling of the event.
/// </summary>
public void RaiseNonCancelablePreviewCurrentChangingEvent(object newValue)
{
if (inhibitChangeEvents.IsSet)
{
return;
}
if (PreviewCurrentChanging != null)
{
var eventArgs = new PreviewChangeEventArgs(CurrentItem, newValue, false);
PreviewCurrentChanging(this, eventArgs);
}
}
/// <summary>
/// Raises the PreviewCurrentCellChangingEvent without allowing canceling of the event.
/// </summary>
public void RaiseNonCancelablePreviewCurrentCellChangingEvent(UniversalCellInfo newValue)
{
if (PreviewCurrentCellChanging != null)
{
var eventArgs = new PreviewChangeEventArgs(CurrentCell, newValue, false);
PreviewCurrentCellChanging(this, eventArgs);
}
if (PreviewCurrentChanging != null && CurrentCell.Item != newValue.Item)
{
isCurrentItemChanged = true;
var eventArgs = new PreviewChangeEventArgs(CurrentCell.Item, newValue.Item, false);
PreviewCurrentChanging(this, eventArgs);
}
}
/// <summary>
/// Raises the PreviewCurrentChangingEvent, allowing the handlers to cancel it,
/// returning the result in 'canceled'
/// </summary>
///
/// <param name="canceled">Returns whether any of the event handlers canceled the event.</param>
public void RaisePreviewCurrentChangingEvent(object newValue, out bool canceled)
{
canceled = false;
if (inhibitChangeEvents.IsSet)
{
return;
}
if (PreviewCurrentChanging != null)
{
var eventArgs = new PreviewChangeEventArgs(CurrentItem, newValue, true);
PreviewCurrentChanging(this, eventArgs);
canceled = eventArgs.Canceled;
}
}
private void CurrentItemTracker_PreviewCurrentChanging(object sender, PreviewChangeEventArgs previewChangeEventArgs)
{
if (ignoreCurrentItemChangedEvent.IsSet)
{
return;
}
bool shiftIsPressed = (Keyboard.Modifiers & ModifierKeys.Shift) != 0;
bool controlIsPressed = (Keyboard.Modifiers & ModifierKeys.Control) != 0;
if (shiftIsPressed || controlIsPressed)
{
if (!DisableEditing())
{
previewChangeEventArgs.Canceled = true;
}
}
}
/// <summary>
/// Raises the PreviewCurrentCellChangingEvent, allowing the handlers to cancel it,
/// returning the result in 'canceled'
/// </summary>
///
/// <param name="canceled">Returns whether any of the event handlers canceled the event.</param>
public void RaisePreviewCurrentCellChangingEvent(UniversalCellInfo newValue, out bool canceled)
{
canceled = false;
if (PreviewCurrentCellChanging != null)
{
var eventArgs = new PreviewChangeEventArgs(CurrentCell, newValue, true);
PreviewCurrentCellChanging(this, eventArgs);
canceled = eventArgs.Canceled;
}
if (!canceled)
{
if (PreviewCurrentChanging != null && CurrentCell.Item != newValue.Item)
{
var eventArgs = new PreviewChangeEventArgs(CurrentCell.Item, newValue.Item, false);
PreviewCurrentChanging(this, eventArgs);
canceled = eventArgs.Canceled;
isCurrentItemChanged = !canceled;
}
}
}
