Added a MouseAttachmentWidget to render the Direction arrows in SelectDirectionalTarget

OpenRA.Mods.Common/Traits/SupportPowers/SelectDirectionalTarget.cs

@@ -13,7 +13,9 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using OpenRA.Graphics;
+using OpenRA.Mods.Common.Widgets;
 using OpenRA.Traits;
+using OpenRA.Widgets;
 
 namespace OpenRA.Mods.Common.Traits
 {
@@ -36,6 +38,7 @@ namespace OpenRA.Mods.Common.Traits
 		bool activated;
 		bool dragStarted;
 		Arrow currentArrow;
+		MouseAttachmentWidget mouseAttachment;
 
 		public SelectDirectionalTarget(World world, string order, SupportPowerManager manager, string cursor,
 			string directionArrowAnimation, string directionArrowPalette)
@@ -47,6 +50,7 @@ namespace OpenRA.Mods.Common.Traits
 			this.directionArrowPalette = directionArrowPalette;
 
 			directionArrows = LoadArrows(directionArrowAnimation, world, arrows.Length);
+			mouseAttachment = Ui.Root.Get<MouseAttachmentWidget>("MOUSE_ATTATCHMENT");
 		}
 
 		IEnumerable<Order> IOrderGenerator.Order(World world, CPos cell, int2 worldPixel, MouseInput mi)
@@ -82,6 +86,8 @@ namespace OpenRA.Mods.Common.Traits
 					dragDirection = -MaxDragThreshold * float2.FromAngle((float)(angle * (Math.PI / 180)));
 
 				currentArrow = GetArrow(angle);
+
+				mouseAttachment.SetAttachment(targetLocation, currentArrow.Sprite, directionArrowPalette);
 				dragStarted = true;
 			}
 
@@ -111,19 +117,7 @@ namespace OpenRA.Mods.Common.Traits
 
 		IEnumerable<IRenderable> IOrderGenerator.Render(WorldRenderer wr, World world) { yield break; }
 
-		IEnumerable<IRenderable> IOrderGenerator.RenderAboveShroud(WorldRenderer wr, World world)
-		{
-			if (!activated || !IsOutsideDragZone)
-				yield break;
-
-			var worldPx = wr.Viewport.ViewToWorldPx(targetLocation);
-			var worldPos = wr.ProjectedPosition(worldPx);
-
-			var scale = (Game.Cursor is SoftwareCursor && CursorProvider.CursorViewportZoomed ? 2 : 1) / wr.Viewport.Zoom;
-
-			var directionPalette = wr.Palette(directionArrowPalette);
-			yield return new SpriteRenderable(currentArrow.Sprite, worldPos, WVec.Zero, -511, directionPalette, scale, true);
-		}
+		IEnumerable<IRenderable> IOrderGenerator.RenderAboveShroud(WorldRenderer wr, World world) { yield break; }
 
 		string IOrderGenerator.GetCursor(World world, CPos cell, int2 worldPixel, MouseInput mi) { return cursor; }
 
@@ -132,8 +126,11 @@ namespace OpenRA.Mods.Common.Traits
 		void IOrderGenerator.Deactivate()
 		{
 			if (activated)
+			{
+				mouseAttachment.Reset();
 				Game.Cursor.Unlock();
 			}
+		}
 
 		// Starting at (0, -1) and rotating in CCW
 		static double AngleOf(float2 delta)

OpenRA.Mods.Common/Widgets/MouseAttachmentWidget.cs

@@ -0,0 +1,57 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2019 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Graphics;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets
+{
+	public class MouseAttachmentWidget : Widget
+	{
+		public bool ClickThrough = true;
+
+		Sprite sprite;
+		readonly WorldRenderer worldRenderer;
+		string palette;
+		int2 location;
+
+		[ObjectCreator.UseCtor]
+		public MouseAttachmentWidget(WorldRenderer worldRenderer)
+		{
+			this.worldRenderer = worldRenderer;
+		}
+
+		public override void Draw()
+		{
+			if (sprite != null && palette != null)
+			{
+				var scale = Game.Cursor is SoftwareCursor && CursorProvider.CursorViewportZoomed ? 2 : 1;
+				var directionPalette = worldRenderer.Palette(palette);
+				WidgetUtils.DrawSHPCentered(sprite, ChildOrigin, directionPalette, scale);
+			}
+		}
+
+		public void SetAttachment(int2 location, Sprite sprite, string palette)
+		{
+			this.sprite = sprite;
+			this.location = location;
+			this.palette = palette;
+		}
+
+		public void Reset()
+		{
+			sprite = null;
+			palette = null;
+		}
+
+		public override int2 ChildOrigin { get { return location; } }
+	}
+}

mods/cnc/chrome/ingame.yaml

@@ -45,6 +45,7 @@ Container@INGAME_ROOT:
 				Container@PLAYER_ROOT:
 		Container@MENU_ROOT:
 		TooltipContainer@TOOLTIP_CONTAINER:
+		MouseAttachment@MOUSE_ATTATCHMENT:
 
 Container@PERF_WIDGETS:
 	Logic: PerfDebugLogic

mods/common/chrome/ingame.yaml

@@ -60,3 +60,4 @@ Container@INGAME_ROOT:
 				Container@PERF_ROOT:
 		Container@MENU_ROOT:
 		TooltipContainer@TOOLTIP_CONTAINER:
+		MouseAttachment@MOUSE_ATTATCHMENT: