Added InitializeUiSystem and InitializeInputHandler to MlemGame to al…

…low overriding default initialization

CHANGELOG.md

@@ -57,6 +57,10 @@ Improvements
 Fixes
 - Fixed DataTextureAtlas creating unnamed entries if there are empty lines at the start or end of the atlas file
 
+### MLEM.Startup
+Additions
+- Added InitializeUiSystem and InitializeInputHandler to MlemGame to allow overriding default initialization
+
 ## 7.1.1
 
 ### MLEM

MLEM.Startup/MlemGame.cs

@@ -82,9 +82,9 @@ public MlemGame(int windowWidth = 1280, int windowHeight = 720) {
         /// </summary>
         protected override void LoadContent() {
             this.SpriteBatch = new SpriteBatch(this.GraphicsDevice);
-            this.InputHandler = new InputHandler(this);
+            this.InputHandler = this.InitializeInputHandler();
             this.Components.Add(this.InputHandler);
-            this.UiSystem = new UiSystem(this, this.InitializeDefaultUiStyle(this.SpriteBatch), this.InputHandler);
+            this.UiSystem = this.InitializeUiSystem(this.InitializeDefaultUiStyle(this.SpriteBatch));
             this.Components.Add(this.UiSystem);
             this.OnLoadContent?.Invoke(this);
         }
@@ -151,6 +151,25 @@ protected virtual UiStyle InitializeDefaultUiStyle(SpriteBatch batch) {
             return new UntexturedStyle(batch);
         }
 
+        /// <summary>
+        /// This method is called in <see cref="LoadContent"/> when the <see cref="UiSystem"/> is initialized.
+        /// Override this method to easily modify or create a new <see cref="MLEM.Ui.UiSystem"/> for this game.
+        /// </summary>
+        /// <param name="style">The ui style to use, gathered from <see cref="InitializeDefaultUiStyle"/>.</param>
+        /// <returns>The <see cref="MLEM.Ui.UiSystem"/> to use for this game.</returns>
+        protected virtual UiSystem InitializeUiSystem(UiStyle style) {
+            return new UiSystem(this, style, this.InputHandler);
+        }
+
+        /// <summary>
+        /// This method is called in <see cref="LoadContent"/> when the <see cref="InputHandler"/> is initialized.
+        /// Override this method to easily modify or create a new <see cref="MLEM.Input.InputHandler"/> for this game.
+        /// </summary>
+        /// <returns>The <see cref="MLEM.Input.InputHandler"/> to use for this game.</returns>
+        protected virtual InputHandler InitializeInputHandler() {
+            return new InputHandler(this);
+        }
+
         /// <summary>
         /// Static helper method for <see cref="ContentManager.Load{T}"/>.
         /// This just invokes the game instance's load method.