/// <summary>
/// Create a new instance of the ToolbarExtensionManager. This class is
/// private and will be called internally by the InitialSetup method.
/// </summary>
/// <param name="_parentToolbar">The viewmodel for the toolbar being managed</param>
/// <param name="_scope">The scope of the data that the tool bar items will have
/// access too</param>
private ToolbarExtensionManager(ToolbarViewModel _parentToolbar, string _scope)
{
this.parentToolbar = _parentToolbar;
this.scope = _scope;
}
/// <summary>
/// Provides a deterministic way to create the ToolbarVMStatic property
/// </summary>
public static void CreateToolbarVM()
{
if (toolbarVM == null)
{
toolbarVM = new ToolbarViewModel();
}
}
/// <summary>
/// Performs the initial setup of the ToolbarExtensionManager. This method
/// must be called once before the Instance property can be used.
/// </summary>
/// <param name="_parentToolbar"></param>
/// <param name="_scope"></param>
public static void InitialSetup(ToolbarViewModel _parentToolbar, string _scope)
{
// Validate parameters
if (_parentToolbar == null)
throw new System.ArgumentNullException("_parentToolPanel", "An invalid ToolPanelViewModel was provided");
if (string.IsNullOrEmpty(_scope))
throw new System.ArgumentNullException("_scope", "An invalid scope was provided");
lock (syncRoot)
{
// Ensure that this can only be called once
if (instance == null)
{
instance = new ToolbarExtensionManager(_parentToolbar, _scope);
ExtensionManager.ComposeParts(instance);
}
}
}
/// <summary>
/// Provides a deterministic way to delete the ToolbarVMStatic property
/// </summary>
public static void ClearToolbarVM()
{
toolbarVM.Cleanup();
toolbarVM = null;
}
