Basic listbox for map list

2010-07-12 18:30:53 +12:00
parent f70ac60135
commit 9b5df39a04
6 changed files with 151 additions and 23 deletions
--- a/OpenRA.Game/Widgets/ListBoxWidget.cs
+++ b/OpenRA.Game/Widgets/ListBoxWidget.cs
@@ -0,0 +1,129 @@
+using System.Drawing;
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it 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.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+namespace OpenRA.Widgets
+{
+	class ListBoxWidget : Widget
+	{
+		public readonly string Background = "dialog";
+		public readonly int ScrollbarWidth = 24;
+		public readonly float ScrollVelocity = 4f;
+		public readonly int HeaderHeight = 25;
+		
+		float ListOffset = 0;
+		bool UpPressed = false;
+		bool DownPressed = false;
+		Rectangle upButtonRect;
+		Rectangle downButtonRect;
+		Rectangle backgroundRect;
+		Rectangle scrollbarRect;
+		
+		public ListBoxWidget() : base() {}
+		public ListBoxWidget(Widget other)
+			: base(other)
+		{
+			Background = (other as ListBoxWidget).Background;
+			upButtonRect = (other as ListBoxWidget).upButtonRect;
+			downButtonRect = (other as ListBoxWidget).downButtonRect;
+			scrollbarRect = (other as ListBoxWidget).scrollbarRect;
+			backgroundRect = (other as ListBoxWidget).backgroundRect;
+			
+			UpPressed = (other as ListBoxWidget).UpPressed;	
+			DownPressed = (other as ListBoxWidget).DownPressed;
+		}
+		
+		public override void DrawInner(World world) {}
+		public override void Draw(World world)
+		{
+			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 scrolbarBg = "dialog3";
+			string scrollbarButton = "dialog2";
+			
+			WidgetUtils.DrawPanel(Background, backgroundRect);
+			WidgetUtils.DrawPanel(upButtonBg, upButtonRect);
+			WidgetUtils.DrawPanel(downButtonBg, downButtonRect);
+			WidgetUtils.DrawPanel(scrolbarBg, scrollbarRect);
+			
+			
+			Game.chrome.renderer.Device.EnableScissor(backgroundRect.X, backgroundRect.Y + HeaderHeight, backgroundRect.Width, backgroundRect.Height - HeaderHeight);
+
+			foreach (var child in Children)
+					child.Draw(world);
+			
+			Game.chrome.renderer.RgbaSpriteRenderer.Flush();
+			Game.chrome.renderer.Device.DisableScissor();
+		}
+		public override int2 ChildOrigin { get { return RenderOrigin + new int2(0, (int)ListOffset); } }
+
+		public override void Tick (World world)
+		{
+			if (UpPressed && ListOffset <= 0) ListOffset += ScrollVelocity;
+			if (DownPressed) ListOffset -= ScrollVelocity;
+		}
+		
+		public override bool HandleInput(MouseInput mi)
+		{
+			if (Chrome.selectedWidget == this)
+			{	
+				UpPressed = upButtonRect.Contains(mi.Location.X,mi.Location.Y);
+				DownPressed = downButtonRect.Contains(mi.Location.X,mi.Location.Y);
+			}
+			
+			// Relinquish focus
+			if (Chrome.selectedWidget == this && mi.Event == MouseInputEvent.Up)
+			{
+				Chrome.selectedWidget = null;
+				UpPressed = DownPressed = false;
+			}
+			
+			// Are we able to handle this event?
+			if (!Visible || !GetEventBounds().Contains(mi.Location.X,mi.Location.Y))
+				return base.HandleInput(mi);
+			
+			
+			if (base.HandleInput(mi))
+				return true;
+			
+			// Give button focus only while the mouse is down
+			// This is a bit of a hack: it will become cleaner soonish
+			// It will also steal events from any potential children
+			// We also want to play a click sound
+			if (mi.Event == MouseInputEvent.Down)
+			{
+				Chrome.selectedWidget = this;
+				return true;
+			}
+			
+			return false;
+		}
+
+		public override Widget Clone() { return new ListBoxWidget(this); }
+	}
+}