feat(UI): Improve slider text display

Author: jcs090218

Assets/JCSUnity/Scripts/UI/Slider/JCS_SliderTextDisplay.cs

@@ -13,6 +13,17 @@
 
 namespace JCSUnity
 {
+    /// <summary>
+    /// A list of slider text display type.
+    /// </summary>
+    public enum SliderTextDisplay
+    {
+        CUSTOM,
+        VALUE,
+        MIN_VALUE,
+        MAX_VALUE,
+    }
+
     /// <summary>
     /// Text that display slider's value.
     /// </summary>
@@ -26,15 +37,25 @@ public class JCS_SliderTextDisplay : JCS_TextObject
         [SerializeField]
         private Slider mSlider = null;
 
+        [Tooltip("Text display type.")]
+        [SerializeField]
+        private SliderTextDisplay mTextDisplay = SliderTextDisplay.VALUE;
+
         [Tooltip("Place you want to round the decimal.")]
         [SerializeField]
         [Range(0, 15)]
         private int mRoundPlace = 2;
 
+        [Tooltip("Display with custom text.")]
+        [SerializeField]
+        private string mCustomFormat = "{0} / {1}";
+
         /* Setter & Getter */
 
         public Slider slider { get { return this.mSlider; } set { this.mSlider = value; } }
+        public SliderTextDisplay TextDisplay { get { return this.mTextDisplay; } set { this.mTextDisplay = value; } }
         public int RoundPlace { get { return this.mRoundPlace; } set { this.mRoundPlace = value; } }
+        public string CustomFormat { get { return this.mCustomFormat; } set { this.mCustomFormat = value; } }
 
         /* Functions */
 
@@ -61,9 +82,45 @@ private void AddListener()
 
         private void OnValueChanged()
         {
-            double val = Math.Round(mSlider.value, mRoundPlace);
+            if (mTextDisplay == SliderTextDisplay.CUSTOM)
+            {
+                this.text = string.Format(mCustomFormat,
+                    GetRoundValue(SliderTextDisplay.VALUE),
+                    GetRoundValue(SliderTextDisplay.MAX_VALUE),
+                    GetRoundValue(SliderTextDisplay.MIN_VALUE));
+
+                return;
+            }
+
+            double val = GetRoundValue(mTextDisplay);
 
             this.text = val.ToString();
         }
+
+        /// <summary>
+        /// Like the function `GetValue` but round the result.
+        /// </summary>
+        private double GetRoundValue(SliderTextDisplay displayType)
+        {
+            return Math.Round(GetValue(displayType), mRoundPlace);
+        }
+
+        /// <summary>
+        /// Return the slider text display type.
+        /// </summary>
+        private double GetValue(SliderTextDisplay displayType)
+        {
+            switch (displayType)
+            {
+                case SliderTextDisplay.VALUE:
+                    return mSlider.value;
+                case SliderTextDisplay.MIN_VALUE:
+                    return mSlider.minValue;
+                case SliderTextDisplay.MAX_VALUE:
+                    return mSlider.maxValue;
+            }
+
+            return 0.0f;
+        }
     }
 }