Rename ListBoxWidget -> ScrollPanelWidget.

OpenRA.Game/Widgets/ScrollPanelWidget.cs

@@ -0,0 +1,120 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 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. For more information,
+ * see LICENSE.
+ */
+#endregion
+
+using System.Drawing;
+using OpenRA.Graphics;
+
+namespace OpenRA.Widgets
+{
+	public class ScrollPanelWidget : Widget
+	{
+		public readonly string Background = "dialog3";
+		public readonly int ScrollbarWidth = 24;
+		public readonly float ScrollVelocity = 4f;
+		public readonly int HeaderHeight = 0;
+		
+		
+		public int ContentHeight = 0;
+		float ListOffset = 0;
+		bool UpPressed = false;
+		bool DownPressed = false;
+		Rectangle upButtonRect;
+		Rectangle downButtonRect;
+		Rectangle backgroundRect;
+		Rectangle scrollbarRect;
+		
+		public ScrollPanelWidget() : base() {}
+		protected ScrollPanelWidget(ScrollPanelWidget other)
+			: base(other)
+		{
+			Background = other.Background;
+			upButtonRect = other.upButtonRect;
+			downButtonRect = other.downButtonRect;
+			scrollbarRect = other.scrollbarRect;
+			backgroundRect = other.backgroundRect;
+			
+			UpPressed = other.UpPressed;	
+			DownPressed = other.DownPressed;
+		}
+		
+		public override void DrawInner( WorldRenderer wr ) {}
+		public override void Draw( WorldRenderer wr )
+		{
+			if (!IsVisible())
+				return;
+
+			backgroundRect = new Rectangle(RenderBounds.X, RenderBounds.Y, RenderBounds.Width - ScrollbarWidth, RenderBounds.Height);
+			upButtonRect = new Rectangle(RenderBounds.Right - ScrollbarWidth, RenderBounds.Y, ScrollbarWidth, ScrollbarWidth);
+			downButtonRect = new Rectangle(RenderBounds.Right - ScrollbarWidth, RenderBounds.Bottom - ScrollbarWidth, ScrollbarWidth, ScrollbarWidth);
+			scrollbarRect = new Rectangle(RenderBounds.Right - ScrollbarWidth, RenderBounds.Y + ScrollbarWidth, ScrollbarWidth, RenderBounds.Height - 2 * ScrollbarWidth);
+
+			string upButtonBg = (UpPressed) ? "dialog3" : "dialog2";
+			string downButtonBg = (DownPressed) ? "dialog3" : "dialog2";
+			string scrollbarBg = "dialog3";
+
+			WidgetUtils.DrawPanel(Background, backgroundRect);
+			WidgetUtils.DrawPanel(upButtonBg, upButtonRect);
+			WidgetUtils.DrawPanel(downButtonBg, downButtonRect);
+			WidgetUtils.DrawPanel(scrollbarBg, scrollbarRect);
+
+			var upOffset = UpPressed ? 4 : 3;
+			var downOffset = DownPressed ? 4 : 3;
+			WidgetUtils.DrawRGBA(ChromeProvider.GetImage("scrollbar", "up_arrow"),
+				new float2(upButtonRect.Left + upOffset, upButtonRect.Top + upOffset));
+			WidgetUtils.DrawRGBA(ChromeProvider.GetImage("scrollbar", "down_arrow"),
+				new float2(downButtonRect.Left + downOffset, downButtonRect.Top + downOffset));
+
+			Game.Renderer.EnableScissor(backgroundRect.X, backgroundRect.Y + HeaderHeight, backgroundRect.Width, backgroundRect.Height - HeaderHeight);
+
+			foreach (var child in Children)
+				child.Draw( wr );
+
+			Game.Renderer.DisableScissor();
+		}
+
+		public override int2 ChildOrigin { get { return RenderOrigin + new int2(0, (int)ListOffset); } }
+
+		public override Rectangle GetEventBounds()
+		{
+			return EventBounds;
+		}
+		
+		public override void Tick ()
+		{
+			if (UpPressed && ListOffset <= 0) ListOffset += ScrollVelocity;
+			if (DownPressed) ListOffset -= ScrollVelocity;
+		}
+		
+		public override bool LoseFocus (MouseInput mi)
+		{
+			UpPressed = DownPressed = false;
+			return base.LoseFocus(mi);
+		}
+		
+		public override bool HandleInputInner(MouseInput mi)
+		{						
+			if (mi.Event == MouseInputEvent.Down && !TakeFocus(mi))
+				return false;
+			
+			if (!Focused)
+				return false;
+
+			UpPressed = upButtonRect.Contains(mi.Location.X,mi.Location.Y);
+			DownPressed = downButtonRect.Contains(mi.Location.X,mi.Location.Y);
+			
+			if (Focused && mi.Event == MouseInputEvent.Up)
+				LoseFocus(mi);
+			
+			return (UpPressed || DownPressed);
+		}
+
+		public override Widget Clone() { return new ScrollPanelWidget(this); }
+	}
+}