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Assets/CarbonInput/Scripts/TouchInput/TouchButton.cs

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+using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+
+namespace CarbonInput {
+    /// <summary>
+    /// Touch control simulating a single gamepad button.
+    /// </summary>
+    public class TouchButton : BaseTouchInput, IPointerDownHandler, IPointerUpHandler, IDragHandler {
+        /// <summary>
+        /// The <see cref="CButton"/> this control emulates.
+        /// </summary>
+        public CButton Button;
+        /// <summary>
+        /// Opacity of this control if it is pressed.
+        /// </summary>
+        [Tooltip("Opacity of this control if it is pressed.")]
+        [Range(0, 1)]
+        public float OpacityPressed = 0.5f;
+        /// <summary>
+        /// Opacity of this control if it is not pressed.
+        /// </summary>
+        [Tooltip("Opacity of this control if it is not pressed.")]
+        [Range(0, 1)]
+        public float OpacityReleased = 1f;
+
+        void Start() {
+            InitMapping();
+            UpdateState(false);
+        }
+
+        /// <summary>
+        /// Updates the state of this control. This methods sets the opacity and the state in the <see cref="TouchMapping"/>.
+        /// </summary>
+        /// <param name="pressed"></param>
+        public void UpdateState(bool pressed) {
+            var image = GetComponent<Image>();
+            var color = image.color;
+            color.a = pressed ? OpacityPressed : OpacityReleased;
+            image.color = color;
+            if(Mapping != null) Mapping[Button] = pressed;
+        }
+        
+        public void OnPointerDown(PointerEventData eventData) {
+            UpdateState(true);
+        }
+
+        public void OnPointerUp(PointerEventData eventData) {
+            UpdateState(false);
+        }
+
+        public void OnDrag(PointerEventData eventData) {
+            RectTransform rect = GetComponent<RectTransform>();
+            UpdateState(RectTransformUtility.RectangleContainsScreenPoint(rect, eventData.position));
+        }
+    }
+}