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Added support to cancel menu using <Esc> key #3

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Added support to cancel menu using <Esc> key #3

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46 changes: 38 additions & 8 deletions ConsoleMenu/ConsoleMenu.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,22 +7,35 @@ namespace ConsoleUI
public class ConsoleMenu<T>
{
public ConsoleMenuItem<T>[] MenuItems { get; set; }

private readonly bool enableQuitUsingEscape;
private string Description;
private int selectedItemIndex = 0;
private bool loopComplete = false;


public ConsoleMenu(string description, IEnumerable<ConsoleMenuItem<T>> menuItems)
: this(description, menuItems, false)
{
}

public ConsoleMenu(string description, IEnumerable<ConsoleMenuItem<T>> menuItems, bool enableQuitUsingEscape)
{
MenuItems = menuItems.ToArray();
Description = description;
this.enableQuitUsingEscape = enableQuitUsingEscape;
}

public void RunConsoleMenu()
/// <summary>
/// Runs the console menu, waiting for user to chose the desired item
/// </summary>
/// <returns>True - if user selected an item from the menu, false - if user used Esc key to cancel the menu</returns>
public bool RunConsoleMenu()
{
//this will resise the console if the amount of elements in the list are too big
if ((MenuItems.Count()) > Console.WindowHeight)
{
//TODO: Deal with console pagging...
//TODO: Deal with console paging...
}

if (!string.IsNullOrEmpty(Description))
Expand All @@ -35,17 +48,17 @@ public void RunConsoleMenu()
ConsoleKeyInfo kb;
Console.CursorVisible = false;


bool menuBailedOut = false;
while (!loopComplete)
{
for (int i = 0; i < MenuItems.Length; i++)
{
WriteConsoleItem(i, selectedItemIndex);
WriteConsoleItem(i);
}

bottomOffset = Console.CursorTop;
kb = Console.ReadKey(true);
HandleKeyPress(kb.Key);
menuBailedOut = HandleKeyPress(kb.Key);

//Reset the cursor to the top of the screen
Console.SetCursorPosition(0, topOffset);
Expand All @@ -55,10 +68,16 @@ public void RunConsoleMenu()
Console.SetCursorPosition(0, bottomOffset);
Console.CursorVisible = true;
loopComplete = false;
MenuItems[selectedItemIndex].CallBack.Invoke(MenuItems[selectedItemIndex].UnderlyingObject);

if (!menuBailedOut)
{
MenuItems[selectedItemIndex].CallBack.Invoke(MenuItems[selectedItemIndex].UnderlyingObject);
}

return !menuBailedOut;
}

private void HandleKeyPress(ConsoleKey pressedKey)
private bool HandleKeyPress(ConsoleKey pressedKey)
{
switch (pressedKey)
{
Expand All @@ -73,10 +92,21 @@ private void HandleKeyPress(ConsoleKey pressedKey)
case ConsoleKey.Enter:
loopComplete = true;
break;

case ConsoleKey.Escape:
if (!enableQuitUsingEscape)
{
break;
}

loopComplete = true;
return true;
}

return false;
}

private void WriteConsoleItem(int itemIndex, int selectedItemIndex)
private void WriteConsoleItem(int itemIndex)
{
if (itemIndex == selectedItemIndex)
{
Expand Down
15 changes: 13 additions & 2 deletions ConsoleMenuTest/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,19 @@ private static void OpenDirectoryBrowserConsole(string rootDirPath)
var dirInfo = new DirectoryInfo(dPath);
return new ConsoleMenuItem<DirectoryInfo>(dirName, DirectoryCallback, dirInfo);
});
var menu = new ConsoleMenu<DirectoryInfo>($"DIR: {Path.GetFileName(rootDirPath)}....", dirs);
menu.RunConsoleMenu();

var menu = new ConsoleMenu<DirectoryInfo>($"DIR: {Path.GetFileName(rootDirPath)}....", dirs, true);
var userPressedEscape = !menu.RunConsoleMenu();
if (userPressedEscape && !IsPathRootDirectory(rootDirPath))
{
Console.Clear();
OpenDirectoryBrowserConsole(Directory.GetParent(rootDirPath).FullName);
}
}

private static bool IsPathRootDirectory(string rootDirPath)
{
return Path.GetPathRoot(rootDirPath).Equals(rootDirPath, StringComparison.CurrentCultureIgnoreCase);
}

private static void DirectoryCallback(DirectoryInfo selectedDirInfo)
Expand Down