Hud refactor (#7202)

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>
Co-authored-by: Jezithyr <jmaster9999@gmail.com>
Co-authored-by: Jezithyr <Jezithyr@gmail.com>
Co-authored-by: Visne <39844191+Visne@users.noreply.github.com>
Co-authored-by: wrexbe <wrexbe@protonmail.com>
Co-authored-by: wrexbe <81056464+wrexbe@users.noreply.github.com>

Content.Client/UserInterface/Systems/Chat/Controls/ChannelSelectorButton.cs

@@ -0,0 +1,110 @@
+using Content.Shared.Chat;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controls;
+using Robust.Shared.Input;
+
+namespace Content.Client.UserInterface.Systems.Chat.Controls;
+
+/// <summary>
+/// Only needed to avoid the issue where right click on the button closes the popup
+/// but leaves the button highlighted.
+/// </summary>
+public sealed class ChannelSelectorButton : Button
+{
+    private readonly ChannelSelectorPopup _channelSelectorPopup;
+    public event Action<ChatSelectChannel>? OnChannelSelect;
+
+    public ChatSelectChannel SelectedChannel { get; private set; }
+
+    private const int SelectorDropdownOffset = 38;
+
+    public ChannelSelectorButton()
+    {
+        // needed so the popup is untoggled regardless of which key is pressed when hovering this button.
+        // If we don't have this, then right clicking the button while it's toggled on will hide
+        // the popup but keep the button toggled on
+        Name = "ChannelSelector";
+        Mode = ActionMode.Press;
+        EnableAllKeybinds = true;
+        ToggleMode = true;
+        OnToggled += OnSelectorButtonToggled;
+        _channelSelectorPopup = UserInterfaceManager.CreatePopup<ChannelSelectorPopup>();
+        _channelSelectorPopup.Selected += OnChannelSelected;
+        _channelSelectorPopup.OnVisibilityChanged += OnPopupVisibilityChanged;
+
+        if (_channelSelectorPopup.FirstChannel is { } firstSelector)
+        {
+            Select(firstSelector);
+        }
+    }
+
+    private void OnChannelSelected(ChatSelectChannel channel)
+    {
+        Select(channel);
+    }
+
+    private void OnPopupVisibilityChanged(Control control)
+    {
+        Pressed = control.Visible;
+    }
+
+    protected override void KeyBindDown(GUIBoundKeyEventArgs args)
+    {
+        // needed since we need EnableAllKeybinds - don't double-send both UI click and Use
+        if (args.Function == EngineKeyFunctions.Use) return;
+        base.KeyBindDown(args);
+    }
+
+    public void Select(ChatSelectChannel channel)
+    {
+        if (_channelSelectorPopup.Visible)
+        {
+            _channelSelectorPopup.Close();
+        }
+
+        if (SelectedChannel == channel) return;
+        SelectedChannel = channel;
+        UpdateChannelSelectButton(channel);
+
+        OnChannelSelect?.Invoke(channel);
+    }
+
+    public string ChannelSelectorName(ChatSelectChannel channel)
+    {
+        return Loc.GetString($"hud-chatbox-select-channel-{channel}");
+    }
+
+    public Color ChannelSelectColor(ChatSelectChannel channel)
+    {
+        return channel switch
+        {
+            ChatSelectChannel.Radio => Color.LimeGreen,
+            ChatSelectChannel.LOOC => Color.MediumTurquoise,
+            ChatSelectChannel.OOC => Color.LightSkyBlue,
+            ChatSelectChannel.Dead => Color.MediumPurple,
+            ChatSelectChannel.Admin => Color.Red,
+            _ => Color.DarkGray
+        };
+    }
+
+    public void UpdateChannelSelectButton(ChatSelectChannel channel)
+    {
+        Text = ChannelSelectorName(channel);
+        Modulate = ChannelSelectColor(channel);
+    }
+
+    private void OnSelectorButtonToggled(ButtonToggledEventArgs args)
+    {
+        if (args.Pressed)
+        {
+            var globalLeft = GlobalPosition.X;
+            var globalBot = GlobalPosition.Y + Height;
+            var box = UIBox2.FromDimensions((globalLeft, globalBot), (SizeBox.Width, SelectorDropdownOffset));
+            _channelSelectorPopup.Open(box);
+        }
+        else
+        {
+            _channelSelectorPopup.Close();
+        }
+    }
+}