Add an Install Mod dialog to the ModChooser

OpenRA.Mods.Common/Widgets/Logic/Installation/InstallModLogic.cs

@@ -0,0 +1,30 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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 COPYING.
+ */
+#endregion
+
+using System.Linq;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets.Logic
+{
+	public class InstallModLogic : ChromeLogic
+	{
+		[ObjectCreator.UseCtor]
+		public InstallModLogic(Widget widget, string modId)
+		{
+			var panel = widget.Get("INSTALL_MOD_PANEL");
+
+			var mods = Manifest.AllMods[modId].RequiresMods.Select(x => "{0} ({1})".F(x.Key, x.Value));
+			var text = string.Join(", ", mods);
+			panel.Get<LabelWidget>("MOD_LIST").Text = text;
+
+			panel.Get<ButtonWidget>("BACK_BUTTON").OnClick = Ui.CloseWindow;
+		}
+	}
+}

OpenRA.Mods.Common/Widgets/Logic/ModBrowserLogic.cs

@@ -158,13 +158,23 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 			if (selectedIndex - modOffset > 4)
 				modOffset = selectedIndex - 4;
 
-			loadButton.Text = modInstallStatus[mod] ? "Load Mod" : "Install Assets";
-
-			loadButton.Text = modPrerequisitesFulfilled[mod.Id] ? loadButton.Text : "Prerequisites missing!";
+			loadButton.Text = !modPrerequisitesFulfilled[mod.Id] ? "Install mod" :
+				modInstallStatus[mod] ? "Load Mod" : "Install Assets";
 		}
 
 		void LoadMod(ModMetadata mod)
 		{
+			if (!modPrerequisitesFulfilled[mod.Id])
+			{
+				var widgetArgs = new WidgetArgs
+				{
+					{ "modId", mod.Id }
+				};
+
+				Ui.OpenWindow("INSTALL_MOD_PANEL", widgetArgs);
+				return;
+			}
+
 			if (!modInstallStatus[mod])
 			{
 				var widgetArgs = new WidgetArgs