Quick and dirty customisation of keyboard controller for lists

Assets/Scripts/Shop/Controller/ListKeyboardController.cs

@@ -0,0 +1,85 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+/// <summary>
+/// This class provides a keyboard controller for a ShopModel in a list view, it defines how to handle keyboard input in HandleInput()
+/// </summary>
+public class ListKeyboardController : ShopController
+{
+    private ViewConfig viewConfig;//To move the focus up and down, we need to know how many columns the grid view has, in the current setup,
+    private int columnCount;      //this information can be found in a ViewConfig scriptable object, which serves as a configuration file for
+                                  //views.
+
+    private int currentItemIndex = 0;//The current item index is changed whenever the focus is moved with keyboard keys
+
+    //------------------------------------------------------------------------------------------------------------------------
+    //                                                  Initialize()
+    //------------------------------------------------------------------------------------------------------------------------
+    //Override Initialize to set up additional information needed by this concrete controller: number of columns in the view
+    public override ShopController Initialize(ShopModel pShopModel)
+    {
+        base.Initialize(pShopModel);//Call base.Initialize to set up the model
+        currentItemIndex = model.GetSelectedItemIndex();//Synchronize the current item index with the model
+        viewConfig = Resources.Load<ViewConfig>("ViewConfig");//Load the ViewConfig scriptable object from the Resources folder
+        Debug.Assert(viewConfig != null);
+        columnCount = viewConfig.gridViewColumnCount;//Try to set up the column count, fails silently
+        return this;
+    }
+
+    //------------------------------------------------------------------------------------------------------------------------
+    //                                                  HandleInput()
+    //------------------------------------------------------------------------------------------------------------------------
+    //Currently hardcoded to AWSD to move focus and K to confirm the selected item. No criterion for the grade, so since lists are assumed to have one colum, we just hardcode that
+    public override void HandleInput()
+    {
+        //Move the focus to the left if possible
+        if (Input.GetKeyDown(KeyCode.A))
+        {
+            currentItemIndex--;
+            if (currentItemIndex < 0)
+            {
+                currentItemIndex = 0;
+            }
+        }
+
+        //Move the focus to the right if possible
+        if (Input.GetKeyDown(KeyCode.D))
+        {
+            currentItemIndex++;
+            if (currentItemIndex >= this.Model.inventory.GetItemCount())
+            {
+                currentItemIndex = this.Model.inventory.GetItemCount() - 1;
+            }
+        }
+
+        //Move the focus up if possible
+        if (Input.GetKeyDown(KeyCode.W))
+        {
+            currentItemIndex--;
+            if (currentItemIndex < 0)
+            {
+                currentItemIndex = 0;
+            }
+        }
+
+        //Move the focus down if possible
+        if (Input.GetKeyDown(KeyCode.S))
+        {
+           currentItemIndex++;
+           if (currentItemIndex >= this.Model.inventory.GetItemCount())
+           {
+               currentItemIndex = this.Model.inventory.GetItemCount() - 1;
+           }
+        }
+
+        //Select the item
+        SelectItemByIndex(currentItemIndex);
+
+        //Confirm the selected item when K is pressed
+        if (Input.GetKeyDown(KeyCode.K))
+        {
+            ConfirmSelectedItem();
+        }
+    }
+}

Assets/Scripts/Shop/Controller/ListKeyboardController.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 84679d97889a19f4286eeae8f2f4e66a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences:
+  - viewConfig: {fileID: 11400000, guid: 5d1182a6d5a724428b8167840f0dfa92, type: 2}
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Shop/View/ShopView.cs

@@ -31,7 +31,7 @@ public abstract class ShopView : MonoBehaviour
 
     protected ShopModel model; // Model in MVC pattern
     protected ShopModel other; // Other model in MVC pattern (our own inventory)
-    private ShopController shopController; //Controller in MVC pattern
+    protected ShopController shopController; //Controller in MVC pattern
 
     private ItemType itemFilter = ItemType.All;     // View can filter items, and this is the filter we want to use for that
 
@@ -149,24 +149,12 @@ public abstract class ShopView : MonoBehaviour
     //------------------------------------------------------------------------------------------------------------------------
     //                                                  SwitchToKeyboardControl()
     //------------------------------------------------------------------------------------------------------------------------    
-    private void SwitchToKeyboardControl()
-    {
-        Destroy(shopController);//Remove the current controller component
-        shopController = gameObject.AddComponent<GridViewKeyboardController>().Initialize(model);//Create and add a keyboard controller
-        instructionText.text = "The current control mode is: Keyboard Control, WASD to select item, press K to buy. Press left mouse button to switch to Mouse Control.";
-        buyButton.gameObject.SetActive(false);//Hide the buy button because we only use keyboard
-    }
+    protected abstract void SwitchToKeyboardControl();
 
     //------------------------------------------------------------------------------------------------------------------------
     //                                                  SwitchToMouseControl()
     //------------------------------------------------------------------------------------------------------------------------ 
-    private void SwitchToMouseControl()
-    {
-        Destroy(shopController);//Remove the current controller component
-        shopController = gameObject.AddComponent<MouseController>().Initialize(model);//Create and add a mouse controller
-        instructionText.text = "The current control mode is: Mouse Control, press 'K' to switch to Keyboard Control.";
-        buyButton.gameObject.SetActive(true);//Show the buy button for the mouse controler
-    }
+    protected abstract void SwitchToMouseControl();
 
     // These three are from the observable interface, and it was decided to leave this stuff to the implementation for now. Keeping here for reference
     // public virtual void OnSelected(Item item)

Assets/Scripts/Shop/View/ShopViewGrid.cs

@@ -68,6 +68,22 @@ public class ShopViewGrid : ShopView
         }
     }
 
+    protected override void SwitchToKeyboardControl()
+    {
+        Destroy(shopController);//Remove the current controller component
+        shopController = gameObject.AddComponent<GridViewKeyboardController>().Initialize(model);//Create and add a keyboard controller
+        instructionText.text = "The current control mode is: Keyboard Control, WASD to select item, press K to buy. Press left mouse button to switch to Mouse Control.";
+        buyButton.gameObject.SetActive(false);//Hide the buy button because we only use keyboard
+    }
+
+    protected override void SwitchToMouseControl()
+    {
+        Destroy(shopController);//Remove the current controller component
+        shopController = gameObject.AddComponent<MouseController>().Initialize(model);//Create and add a mouse controller
+        instructionText.text = "The current control mode is: Mouse Control, press 'K' to switch to Keyboard Control.";
+        buyButton.gameObject.SetActive(true);//Show the buy button for the mouse controler
+    }
+
     private void OnValidate()
     {
         _gridLayoutGroup = (GridLayoutGroup) layoutGroup;

Assets/Scripts/Shop/View/ShopViewList.cs

@@ -77,6 +77,22 @@ public class ShopViewList : ShopView, IShopModelObserver<Item>
         }
     }
 
+    protected override void SwitchToKeyboardControl()
+    {
+        Destroy(shopController);//Remove the current controller component
+        shopController = gameObject.AddComponent<ListKeyboardController>().Initialize(model);//Create and add a keyboard controller
+        instructionText.text = "The current control mode is: Keyboard Control, WASD to select item, press K to buy. Press left mouse button to switch to Mouse Control.";
+        buyButton.gameObject.SetActive(false);//Hide the buy button because we only use keyboard
+    }
+
+    protected override void SwitchToMouseControl()
+    {
+        Destroy(shopController);//Remove the current controller component
+        shopController = gameObject.AddComponent<MouseController>().Initialize(model);//Create and add a mouse controller
+        instructionText.text = "The current control mode is: Mouse Control, press 'K' to switch to Keyboard Control.";
+        buyButton.gameObject.SetActive(true);//Show the buy button for the mouse controler
+    }
+
     private void OnValidate()
     {
         _listLayoutGroup = (VerticalLayoutGroup) layoutGroup;