private static int getMenuResult(int x, int y, MenuItem menuItem, bool isNewMenu)
{
#region Prepare Variables
menuItem._validate();
var menuItems = menuItem.ChildMenuItems;
var options = menuItem.Options;
var menuItemsText = menuItems.Select(a => a.Caption).ToList();
var maxItemLength = menuItemsText.Max(a => a.Length);
var useArrows = options.Mode != MenuMode.ShortkeysOnly;
var useShortkeys = options.Mode != MenuMode.ArrowsOnly;
var colorScheme = options.ColorScheme;
#endregion
#region Draw menu if necessary
if (isNewMenu)
{
if (currentMenuPosition == 0)
{
currentMenuPosition = -1;
for (var i = 0; i < menuItems.Count; i++)
{
if (menuItems[i].IsActive)
{
currentMenuPosition = i;
break;
}
}
}
if (currentMenuPosition == -1)
return -1;
drawMenu(x, y, menuItem);
}
var linesPerItem = options.ItemSpacing+1;
var xPos = x + 1 + options.FrameSpacingHorizontal + (options.Mode != MenuMode.ArrowsOnly ? 4 : 0);
#endregion
#region Get action result
while (true)
{
#region Highlight current choice if needed
var yPos = y + 1 + options.FrameSpacingVertical + currentMenuPosition*linesPerItem;
if (useArrows)
{
var currentMenuItemText = options.UseSelectedCaps ? menuItemsText[currentMenuPosition].ToUpper() : menuItemsText[currentMenuPosition];
ZOutput.Print(
xPos, yPos,
currentMenuItemText.PadRight(maxItemLength, ' '),
options.UseSelectedForeColor ? colorScheme.SelectedForeColor : colorScheme.TextForeColor,
options.UseSelectedBackColor ? colorScheme.SelectedBackColor : colorScheme.TextBackColor);
}
#endregion
#region Escape key and any additional hotkeys
var key = Console.ReadKey(true).Key;
if (key == ConsoleKey.Escape || key == ConsoleKey.Backspace)
return -1;
if (hotKeyValues != null && hotKeyValues.ContainsKey(key))
{
hotKeyValues[key]();
}
#endregion
#region Short Keys logic
if (useShortkeys && key >= ConsoleKey.D1 && key <= (ConsoleKey)(menuItems.Count+48))
{
var val = (int)key - 49;
if (menuItems[val].IsActive)
return val;
}
#endregion
#region Arrow Control logic
if (useArrows)
{
var oldPosition = currentMenuPosition;
switch (key)
{
case ConsoleKey.DownArrow:
do
{
currentMenuPosition = (currentMenuPosition < menuItems.Count-1) ? currentMenuPosition + 1 : 0;
} while (!menuItems[currentMenuPosition].IsActive);
break;
case ConsoleKey.UpArrow:
do
{
currentMenuPosition = (currentMenuPosition > 0) ? currentMenuPosition - 1 : menuItems.Count-1;
} while (!menuItems[currentMenuPosition].IsActive);
break;
case ConsoleKey.RightArrow:
if (menuItems[currentMenuPosition].HasChilds)
return currentMenuPosition;
break;
case ConsoleKey.LeftArrow:
if (menuItem.Parent != null)
return -1;
break;
case ConsoleKey.Enter:
case ConsoleKey.Spacebar:
return currentMenuPosition;
}
if (oldPosition != currentMenuPosition)
{
ZOutput.Print(xPos, yPos, menuItemsText[oldPosition].PadRight(maxItemLength, ' '), colorScheme.TextForeColor, colorScheme.TextBackColor);
}
}
#endregion
}
#endregion
}