Base Scene

Assets/Imported/Scripts/InspectorButton.cs

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+/*
+ * @author zaikman
+ * @url https://www.reddit.com/r/Unity3D/comments/1s6czv/inspectorbutton_add_a_custom_button_to_your/
+ */
+
+using UnityEngine;
+#if UNITY_EDITOR
+using UnityEditor;
+#endif
+using System.Reflection;
+
+/// <summary>
+/// This attribute can only be applied to fields because its
+/// associated PropertyDrawer only operates on fields (either
+/// public or tagged with the [SerializeField] attribute) in
+/// the target MonoBehaviour.
+/// </summary>
+[System.AttributeUsage(System.AttributeTargets.Field)]
+public class InspectorButtonAttribute : PropertyAttribute
+{
+    public static float kDefaultButtonWidth = 80;
+
+    public readonly string MethodName;
+
+    private float _buttonWidth = kDefaultButtonWidth;
+    public float ButtonWidth
+    {
+        get { return _buttonWidth; }
+        set { _buttonWidth = value; }
+    }
+
+    public InspectorButtonAttribute(string MethodName)
+    {
+        this.MethodName = MethodName;
+    }
+
+    public InspectorButtonAttribute(string MethodName, float ButtonWidth)
+    {
+        this.MethodName = MethodName;
+        this.ButtonWidth = ButtonWidth;
+    }
+}
+
+#if UNITY_EDITOR
+[CustomPropertyDrawer(typeof(InspectorButtonAttribute))]
+public class InspectorButtonPropertyDrawer : PropertyDrawer
+{
+    private MethodInfo _eventMethodInfo = null;
+
+    public override void OnGUI(Rect position, SerializedProperty prop, GUIContent label)
+    {
+        InspectorButtonAttribute inspectorButtonAttribute = (InspectorButtonAttribute)attribute;
+        Rect buttonRect = new Rect(position.x + (position.width - inspectorButtonAttribute.ButtonWidth) * 0.5f, position.y, inspectorButtonAttribute.ButtonWidth, position.height);
+        if (GUI.Button(buttonRect, label.text))
+        {
+            System.Type eventOwnerType = prop.serializedObject.targetObject.GetType();
+            string eventName = inspectorButtonAttribute.MethodName;
+
+            if (_eventMethodInfo == null)
+                _eventMethodInfo = eventOwnerType.GetMethod(eventName, BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
+
+            if (_eventMethodInfo != null)
+                _eventMethodInfo.Invoke(prop.serializedObject.targetObject, null);
+            else
+                Debug.LogWarning(string.Format("InspectorButton: Unable to find method {0} in {1}", eventName, eventOwnerType));
+        }
+    }
+}
+#endif

Assets/Imported/Scripts/InspectorButton.cs.meta

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+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
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Assets/Imported/Scripts/RectTransformExtensions.cs

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+/*
+ * @author Eldoir
+ * @link https://answers.unity.com/questions/888257/access-left-right-top-and-bottom-of-recttransform.html#
+ */
+using UnityEngine;
+
+public static class RectTransformExtensions
+{
+    public static void SetLeft(this RectTransform rt, float left)
+    {
+        rt.offsetMin = new Vector2(left, rt.offsetMin.y);
+    }
+
+    public static void SetRight(this RectTransform rt, float right)
+    {
+        rt.offsetMax = new Vector2(-right, rt.offsetMax.y);
+    }
+
+    public static void SetTop(this RectTransform rt, float top)
+    {
+        rt.offsetMax = new Vector2(rt.offsetMax.x, -top);
+    }
+
+    public static void SetBottom(this RectTransform rt, float bottom)
+    {
+        rt.offsetMin = new Vector2(rt.offsetMin.x, bottom);
+    }
+}

Assets/Imported/Scripts/RectTransformExtensions.cs.meta

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