/// <summary>
/// Вспомогательная функция для обработки действий при выборе элемента в режиме одиночного выделения элементов.
/// </summary>
/// <remarks>
/// Helper function for handling actions when selecting an item in single item selection mode.
/// </remarks>
internal void SingleSelection(bool value, SelectionAction state)
{
if (ParentUIEnumSwitch != null)
{
IsSelected = value;
switch (state)
{
case SelectionAction.FirstSelection:
if (IsSelected)
{
if (FirstTimeSelected)
{
FirstTimeSelected = false;
}
OnSelected(new RoutedEventArgs(Selector.SelectedEvent, this));
}
ParentUIEnumSwitch.HandleSingleSelection(DataContext, false);
break;
case SelectionAction.Selection:
if (IsSelected)
{
OnSelected(new RoutedEventArgs(Selector.SelectedEvent, this));
}
ParentUIEnumSwitch.HandleSingleSelection(DataContext, true);
break;
}
}
}
/// <summary>
/// Виртуальная функция, которая реализует обработку свойства IsSelected в соответствии с режимом выбора элементов родительского UIEnumSwitch.
/// </summary>
/// <remarks>
/// Virtual function that implements how to handle IsSelected property acording to parent UIEnumSwitch selection mode
/// </remarks>
protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
{
base.OnMouseLeftButtonUp(e);
if (ParentUIEnumSwitch.SelectionMode == SelectionModeEnum.Single)
{
if (!IsSelected && FirstTimeSelected)
{
SingleSelection(true, SelectionAction.FirstSelection);
}
else if (!IsSelected && !FirstTimeSelected)
{
SingleSelection(true, SelectionAction.Selection);
}
}
else if (ParentUIEnumSwitch.SelectionMode == SelectionModeEnum.MultipleWithDefault)
{
if (FirstTimeSelected)
{
MultipleSelectionWithDefault(!IsSelected, SelectionAction.FirstSelection);
}
else
{
if (ParentUIEnumSwitch.IsItemIsDefault(this))
{
if (!IsSelected)
{
MultipleSelectionWithDefault(!IsSelected, SelectionAction.Selection);
}
}
else
{
MultipleSelectionWithDefault(!IsSelected, SelectionAction.Selection);
}
}
}
else if (ParentUIEnumSwitch.SelectionMode == SelectionModeEnum.Multiple)
{
if (FirstTimeSelected)
{
MultipleSelection(!IsSelected, SelectionAction.FirstSelection);
}
else
{
MultipleSelection(!IsSelected, SelectionAction.Selection);
}
}
e.Handled = true;
}
/// <summary>
/// Вспомогательная функция для обработки действий при выборе элемента в режиме множественного выделения элементов с выбором элемента по умолчанию, если ничего не выбрано.
/// </summary>
/// <remarks>
/// Helper function for handling actions when selecting an item in multiple selection mode with a default item selection if nothing is selected.
/// </remarks>
internal void MultipleSelectionWithDefault(bool value, SelectionAction state)
{
if (ParentUIEnumSwitch != null)
{
IsSelected = value;
switch (state)
{
case SelectionAction.FirstSelection:
if (IsSelected)
{
if (FirstTimeSelected)
{
FirstTimeSelected = false;
}
OnSelected(new RoutedEventArgs(Selector.SelectedEvent, this));
}
else
{
if (FirstTimeSelected)
{
FirstTimeSelected = false;
}
OnUnselected(new RoutedEventArgs(Selector.UnselectedEvent, this));
}
ParentUIEnumSwitch.HandleMultipleSelectionWithDefault(DataContext);
break;
case SelectionAction.Selection:
if (IsSelected)
{
OnSelected(new RoutedEventArgs(Selector.SelectedEvent, this));
}
else
{
OnUnselected(new RoutedEventArgs(Selector.UnselectedEvent, this));
}
ParentUIEnumSwitch.HandleMultipleSelectionWithDefault(DataContext);
break;
}
}
}
