/// <summary>
/// Adds instances to the selection list.
/// </summary>
/// <param name="item">The item to select.</param>
/// <param name="clearCurrentSelection">Determines if the current selection will be cleared.</param>
/// <param name="pushToHistory">Determines if an action is pushed to the <see cref="HistoryService" /></param>
public void Select(Instance item, bool clearCurrentSelection = false, bool pushToHistory = true)
{
if (clearCurrentSelection)
{
ClearSelection();
}
if (item == null || item.IsSelected)
{
return;
}
_selection.TryAdd(item);
item.IsSelected = true;
Selected.Fire(item);
SelectionChanged.Fire();
var element = item as GuiElement;
if (element != null)
{
lock (Locker)
{
SelectedGuiElements.Add(element);
}
}
if (pushToHistory)
{
HistoryService.ExecuteAction(new SelectionAction(item, false));
}
}
/// <summary>
/// Removes instances from the selection list.
/// </summary>
/// <param name="item">The item to deselect.</param>
/// <param name="pushToHistory">Determines if an action is pushed to the <see cref="HistoryService" /></param>
public void Deselect(Instance item, bool pushToHistory = true)
{
if (item == null || !item.IsSelected)
{
return;
}
_selection.TryRemove(item);
item.IsSelected = false;
Deselected.Fire(item);
SelectionChanged.Fire();
var element = item as GuiElement;
if (element != null)
{
lock (Locker)
{
SelectedGuiElements.Add(element);
}
}
if (pushToHistory)
{
HistoryService.ExecuteAction(new SelectionAction(item, true));
}
}