public static void RunMenuItem(string[] args, MenuItem callingMenuItem)
{
MenuItem[] menuItems;
ConsoleKeyInfo keyInput;
string availableChoices, choiceChar;
MenuItem choiceMenuItem, parent;
IMenuCommand menuCommand;
AsciiBoxOptions menuOptions = callingMenuItem.GetMenuOptions();
bool drawMenu = true;
menuOptions.HeaderJustification = AsciiLineJustification.Left;
// check the menu item for a sub menu
menuItems = callingMenuItem.GetSubMenu();
if (menuItems.Length > 0)
{
List <string> menuLines = new List <string>();
List <string> headerLines = new List <string>();
headerLines.Add(callingMenuItem.MenuText);
parent = callingMenuItem.ActiveParent;
while (parent != null)
{
headerLines.Add(parent.MenuText);
parent = parent.ActiveParent;
}
headerLines.Reverse();
for (int i = 1; i < headerLines.Count; i++)
{
headerLines[i] = string.Concat(new string(' ', 2 * i), "└─", headerLines[i]);
}
for (int i = 0; i < menuItems.Length; i++)
{
menuLines.Add(string.Format("({0}) {1}", CHOICES[i], menuItems[i].MenuText));
}
availableChoices = CHOICES.Substring(0, menuLines.Count);
menuLines.Add(string.Format("(ESC) {0}", callingMenuItem.EscapeText));
while (true)
{
if (drawMenu)
{
ConsoleExt.WriteAsciiMenu(menuOptions, headerLines.ToArray(), menuLines.ToArray());
Sys.Console.Write(" > ");
drawMenu = false;
}
keyInput = Sys.Console.ReadKey(true);
choiceChar = keyInput.KeyChar.ToString().ToUpper();
if (availableChoices.Contains(choiceChar) || keyInput.Key == ConsoleKey.Escape)
{
if (keyInput.Key == ConsoleKey.Escape)
{
Sys.Console.WriteLine();
return;
}
Sys.Console.WriteLine(keyInput.KeyChar);
// a menu item has been chosen, run it
choiceMenuItem = menuItems[availableChoices.IndexOf(choiceChar)];
choiceMenuItem.ActiveParent = callingMenuItem;
RunMenuItem(args, choiceMenuItem);
choiceMenuItem.ActiveParent = null;
drawMenu = true;
}
}
}
else
{
// this menu item doesn't have any sub menu, run its command
menuCommand = callingMenuItem.GetCommand();
if (menuCommand == null)
{
Sys.Console.Error.WriteLine(string.Format("!! The menu item {0} does not provide a command to process or a sub menu to display. !!", callingMenuItem.GetType().Name));
return;
}
menuCommand.Run(args, callingMenuItem);
}
}
