refactor placement buttons to accomodate delete

Assets/Scenes/Game.unity

@@ -708,6 +708,7 @@ GameObject:
   - component: {fileID: 179679301}
   - component: {fileID: 179679300}
   - component: {fileID: 179679299}
+  - component: {fileID: 179679302}
   m_Layer: 5
   m_Name: Remove
   m_TagString: Untagged
@@ -817,6 +818,18 @@ CanvasRenderer:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 179679297}
   m_CullTransparentMesh: 1
+--- !u!114 &179679302
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 179679297}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: bd64ba32c0dc69d40a067bbeb7f1b8f0, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
 --- !u!114 &180485348 stripped
 MonoBehaviour:
   m_CorrespondingSourceObject: {fileID: 217791848456698108, guid: 5497dc5adfbe67341980c9d946816424, type: 3}

Assets/Scripts/CardInfo.cs

@@ -0,0 +1,5 @@
+using UnityEngine;
+
+public class CardInfo : ScriptableObject
+{
+}

Assets/Scripts/CardInfo.cs.meta

@@ -0,0 +1,11 @@
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+guid: 3a23104b82dc1384aa1f7fa6f263a41c
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/DeleteButton.cs

@@ -0,0 +1,12 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+public class DeleteButton : PlacementButton
+{
+    protected override DraggablePlaceholder Place()
+    {
+        throw new System.NotImplementedException();
+    }
+}

Assets/Scripts/DeleteButton.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: bd64ba32c0dc69d40a067bbeb7f1b8f0
+MonoImporter:
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Assets/Scripts/Drag&Drop/GameObjectPlacementButton.cs

@@ -13,7 +13,7 @@ public class GameObjectPlacementButton : UnitPlacementButton
         var hasEnoughPopulation = isBuilding || ResourceManager.Instance.EnoughPopulationFor(defaultPopCost);
         return ResourceManager.Instance.EnoughFor(_rock, _wood, _food)
                 && hasEnoughPopulation
-                && _button.enabled && _canSpawn;
+                && base.CanPlace();
     }
 
     protected override DraggablePlaceholder Place()
@@ -44,7 +44,7 @@ public class GameObjectPlacementButton : UnitPlacementButton
             color.a = 0.6f;
             rend.color = color;
 
-            rend.material = _outlineMaterial;
+            rend.material = OutlineMaterial;
             placeholder.OutlineRenderers.Add(rend);
         }
         

Assets/Scripts/Drag&Drop/PlacementButton.cs

@@ -0,0 +1,53 @@
+using GatherAndDefend.Events;
+using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+
+[RequireComponent(typeof(Button))]
+public abstract class PlacementButton : MonoBehaviour, IPointerDownHandler
+{
+    private bool _canUse = false;
+    private Button _button;
+    private DraggablePlaceholder placeholder;
+    [SerializeField]
+    private Material _outlineMaterial;
+
+    public bool CanUse => _canUse;
+    public Button Button => _button;
+    public DraggablePlaceholder Placeholder => placeholder;
+    public Material OutlineMaterial => _outlineMaterial;
+    protected virtual void Start()
+    {
+        _button = GetComponent<Button>();
+        _button.enabled = false;
+        EventAggregator.Instance.GetEvent<LevelLoadedEvent>().Attach(OnLevelLoaded);
+        EventAggregator.Instance.GetEvent<ExitingLevelEvent>().Attach(DeactivateButton);
+    }
+
+    protected virtual void Update()
+    {
+        _button.interactable = CanPlace();
+    }
+
+    private void OnLevelLoaded(GatherAndDefend.LevelEditor.Level level)
+    {
+        _canUse = true;
+        EventAggregator.Instance.GetEvent<LevelLoadedEvent>().Detach(OnLevelLoaded);
+    }
+
+    void DeactivateButton()
+    {
+        EventAggregator.Instance.GetEvent<ExitingLevelEvent>().Detach(DeactivateButton);
+        _canUse = false;
+    }
+    public virtual void OnPointerDown(PointerEventData eventData)
+    {
+        if (!_button.interactable) return;
+        placeholder = Place();
+    }
+    protected abstract DraggablePlaceholder Place();
+    protected virtual bool CanPlace()
+    {
+        return Button.enabled && CanUse;
+    }
+}

Assets/Scripts/Drag&Drop/PlacementButton.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: ecad147c112b0c14d8e6705756ea170e
+MonoImporter:
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+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
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+  assetBundleVariant: 

Assets/Scripts/Drag&Drop/TilePlacementButton.cs

@@ -8,7 +8,7 @@ public class TilePlacementButton : UnitPlacementButton
 
     protected override bool CanPlace()
 {
-        return ResourceManager.Instance.EnoughFor(_rock, _wood, _food) && _button.enabled && _canSpawn;
+        return ResourceManager.Instance.EnoughFor(_rock, _wood, _food) && base.CanPlace();
     }
 
     protected override DraggablePlaceholder Place()
@@ -19,7 +19,7 @@ public class TilePlacementButton : UnitPlacementButton
         var rend = instance.AddComponent<SpriteRenderer>();
         rend.sprite = tile.Sprite;
         rend.sortingLayerName = "Character";
-        rend.material = _outlineMaterial;
+        rend.material = OutlineMaterial;
         rend.sortingOrder = 2;
         return placeholder;
     }

Assets/Scripts/Drag&Drop/UnitPlacementButton.cs

@@ -1,16 +1,10 @@
-using System.Collections;
-using System.Collections.Generic;
 using TMPro;
 using UnityEngine;
 using UnityEngine.EventSystems;
 using UnityEngine.UI;
-using GatherAndDefend.Events;
 
-[RequireComponent(typeof(Button))]
-public abstract class UnitPlacementButton : MonoBehaviour, IPointerDownHandler
+public abstract class UnitPlacementButton : PlacementButton
 {
-    [SerializeField]
-    protected Material _outlineMaterial;
     [SerializeField]
     protected Sprite _detectionRangeSprite;
 
@@ -21,7 +15,6 @@ public abstract class UnitPlacementButton : MonoBehaviour, IPointerDownHandler
     [SerializeField]
     protected int _food;
 
-    protected Button _button;
     [SerializeField]
     private TMP_Text _foodLabel;
     [SerializeField]
@@ -29,30 +22,10 @@ public abstract class UnitPlacementButton : MonoBehaviour, IPointerDownHandler
     [SerializeField]
     private TMP_Text _rockLabel;
 
-    protected bool _canSpawn = false;
    
-    protected virtual void Start()
+    protected override void Update()
     {
-        _button = GetComponent<Button>();
-
-        _button.enabled = false;
-        EventAggregator.Instance.GetEvent<LevelLoadedEvent>().Attach(OnLevelLoaded);
-        EventAggregator.Instance.GetEvent<ExitingLevelEvent>().Attach(DeactivateButton);
-    }
-    private void OnLevelLoaded(GatherAndDefend.LevelEditor.Level level)
-    {
-        _canSpawn = true;
-        EventAggregator.Instance.GetEvent<LevelLoadedEvent>().Detach(OnLevelLoaded);
-    }
-
-    void DeactivateButton() 
-    {
-        EventAggregator.Instance.GetEvent<ExitingLevelEvent>().Detach(DeactivateButton);
-        _canSpawn = false;
-    }
-    protected virtual void Update()
-    {
-        _button.interactable = CanPlace();
+        base.Update();
 
         SetTextFor(_foodLabel, _food);
         SetTextFor(_rockLabel, _rock);
@@ -63,15 +36,11 @@ public abstract class UnitPlacementButton : MonoBehaviour, IPointerDownHandler
         label.transform.parent.gameObject.SetActive(value > 0);
         label.text = "" + value;
     }
-    public void OnPointerDown(PointerEventData eventData)
+    public override void OnPointerDown(PointerEventData eventData)
     {
-        if (!_button.interactable) return;
-
-        var placeholder = Place();
-        placeholder.Rock = _rock;
-        placeholder.Wood = _wood;
-        placeholder.Food = _food;
+        base.OnPointerDown(eventData);
+        Placeholder.Rock = _rock;
+        Placeholder.Wood = _wood;
+        Placeholder.Food = _food;
     }
-    protected abstract DraggablePlaceholder Place();
-    protected abstract bool CanPlace();
 }