/// <summary>
/// Creates and tracks a context menu.
/// </summary>
public void CreateAndShowContextMenu(Control owner, Point point, object provider)
{
if (owner == null)
{
throw new ArgumentNullException("owner");
}
if (provider == null)
{
throw new ArgumentNullException("provider");
}
// get...
CommandCollection commands = Command.GetCommands(provider);
if (commands == null || commands.Count == 0)
{
return;
}
// context...
DesktopCommandClickContext context = new DesktopCommandClickContext(owner);
// create...
ContextMenu menu = this.CreateContextMenu(context, commands);
if (menu == null)
{
throw new InvalidOperationException("menu is null.");
}
// mbr - 2009-07-09 - added dispose...
menu.Show(owner, point);
}
/// <summary>
/// Creates a context menu from a set of commands.
/// </summary>
/// <param name="commands"></param>
/// <returns></returns>
public ContextMenu CreateContextMenu(DesktopCommandClickContext context, CommandCollection commands)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (commands == null)
{
throw new ArgumentNullException("commands");
}
// walk...
ContextMenu menu = new ContextMenu();
this.PopulateMenuItems(context, menu.MenuItems, commands);
// return...
return(menu);
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="command"></param>
internal CommandMenuItem(DesktopCommandClickContext ClickContext, Command command, CommandViewContext viewContext)
: base(command.GetText(viewContext))
{
if (ClickContext == null)
{
throw new ArgumentNullException("ClickContext");
}
if (command == null)
{
throw new ArgumentNullException("command");
}
// set...
_context = ClickContext;
_command = command;
// mbr - 2009-02-01 - added image support...
if (command is DesktopCommand)
{
this.ImageResourceAssembly = ((DesktopCommand)command).ImageResourceAssembly;
this.ImageResourceName = ((DesktopCommand)command).ImageResourceName;
}
}
/// <summary>
/// Populates menu items from the given command collection.
/// </summary>
/// <param name="items"></param>
/// <param name="commands"></param>
private void PopulateMenuItems(DesktopCommandClickContext context, Menu.MenuItemCollection items, CommandCollection commands)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (items == null)
{
throw new ArgumentNullException("items");
}
if (commands == null)
{
throw new ArgumentNullException("commands");
}
// how many are selected?
int numSelected = 1;
if (context.OwnerAsEntityView != null)
{
numSelected = context.OwnerAsEntityView.SelectedEntitiesCount;
}
// walk...
foreach (Command command in commands)
{
// ok?
bool ok = true;
if (numSelected > 1 && command.SingleOnly)
{
ok = false;
}
// ok?
if (ok)
{
// sep?
if (command.HasSeparator)
{
// add a separator...
bool sepOk = true;
if (items.Count > 0)
{
string above = items[items.Count - 1].Text;
if (above != null && above == "-")
{
sepOk = false;
}
}
else
{
sepOk = false;
}
// add...
if (sepOk)
{
items.Add("-");
}
}
// add...
items.Add(new CommandMenuItem(context, command, CommandViewContext.ContextMenu));
}
}
}
