/// <summary> Helper method for checking a selection checkbox of one of the layers. Updates the selection checkboxes. </summary>
/// <param name="sender"> Sender of the Checked event. </param>
/// <param name="selectable"> Shows if the layer is marked to be selectable or not. </param>
private void selection_Common(object sender, bool selectable)
{
if (updateByExclusiveSelection)
{
return; // Nothing to do because the setting is applied indirectly und would cause errors.
}
if (layers.ExclusiveSelectableLayer == null)
{
// No exclusive layer: Toggle the selectable flag according the CheckBox
layers.SetSelectable(layers[(sender as CheckBox)?.Tag as string], selectable);
}
else
{
// If an exclusive layer is activated and the LMB is clicked,
// the exclusive mode is reset. All standard selection settings
// are restored.
layers.ExclusiveSelectableLayer = null;
}
UpdateSelection();
}