Improvements on Color Picker:

- .gitignore - Added "/.vs" to ignore VS 2017's new folder.
- Added Color Sampler feature to pick colors from the screen.
- Fixed issue with ColorPickerPresets with "not working" HSVChanged()
- Changed the way ColorPickerPresets work. Can now add predefined colors in the inspector, plus save/load from player prefs or json file.
- Modified UI layout for Picker 2.0 prefab to allow for expansion of presets, toggling of RGB vs HSV. Still could use some work as the layout doesn't collapse/expand nicely.

.gitignore

@@ -32,3 +32,4 @@ sysinfo.txt
 # Builds
 *.apk
 *.unitypackage
+/.vs

Examples/ColorPicker/Picker 2.0.prefab.meta

@@ -1,8 +1,10 @@
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+timeCreated: 1519012868
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Examples/ColorPicker/sampler_ring.png.meta

@@ -0,0 +1,117 @@
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Scripts/Controls/ColorPicker/ColorPickerControl.cs

@@ -1,11 +1,12 @@
-///Credit judah4
+///Credit judah4
 ///Sourced from - http://forum.unity3d.com/threads/color-picker.267043/
+using System.Collections.Generic;
 
 namespace UnityEngine.UI.Extensions.ColorPicker
 {
-
+	[ExecuteInEditMode]
 	public class ColorPickerControl : MonoBehaviour
-{
+	{
 		private float _hue = 0;
 		private float _saturation = 0;
 		private float _brightness = 0;
@@ -19,6 +20,51 @@ namespace UnityEngine.UI.Extensions.ColorPicker
 		public ColorChangedEvent onValueChanged = new ColorChangedEvent();
 		public HSVChangedEvent onHSVChanged = new HSVChangedEvent();
 
+		[SerializeField]
+		bool hsvSlidersOn = true;
+
+		[SerializeField]
+		List<GameObject> hsvSliders = new List<GameObject>();
+
+		[SerializeField]
+		bool rgbSlidersOn = true;
+
+		[SerializeField]
+		List<GameObject> rgbSliders = new List<GameObject>();
+
+		[SerializeField]
+		GameObject alphaSlider;
+
+		public void SetHSVSlidersOn(bool value)
+		{
+			hsvSlidersOn = value;
+
+			foreach (var item in hsvSliders)
+				item.SetActive(value);
+
+			if (alphaSlider)
+				alphaSlider.SetActive(hsvSlidersOn || rgbSlidersOn);
+		}
+
+		public void SetRGBSlidersOn(bool value)
+		{
+			rgbSlidersOn = value;
+			foreach (var item in rgbSliders)
+				item.SetActive(value);
+
+			if (alphaSlider)
+				alphaSlider.SetActive(hsvSlidersOn || rgbSlidersOn);
+		}
+
+
+		void Update()
+		{
+#if UNITY_EDITOR
+			SetHSVSlidersOn(hsvSlidersOn);
+			SetRGBSlidersOn(rgbSlidersOn);
+#endif
+		}
+
 		public Color CurrentColor
 		{
 			get
@@ -253,5 +299,5 @@ namespace UnityEngine.UI.Extensions.ColorPicker
 					throw new System.NotImplementedException("");
 			}
 		}
-}
+	}
 }

Scripts/Controls/ColorPicker/ColorPickerPresets.cs

@@ -1,48 +1,177 @@
-///Credit judah4
+///Credit judah4
 ///Sourced from - http://forum.unity3d.com/threads/color-picker.267043/
-
+using System.Collections.Generic;
 
 namespace UnityEngine.UI.Extensions.ColorPicker
 {
 	public class ColorPickerPresets : MonoBehaviour
 	{
 		public ColorPickerControl picker;
-        public GameObject[] presets;
+
+		[SerializeField]
+		protected GameObject presetPrefab;
+
+		[SerializeField]
+		protected int maxPresets = 16;
+
+		[SerializeField]
+		protected Color[] predefinedPresets;
+
+		protected List<Color> presets = new List<Color>();
 		public Image createPresetImage;
+		public Transform createButton;
 
-        void Awake()
+		public enum SaveType { None, PlayerPrefs, JsonFile }
+		[SerializeField]
+		protected SaveType saveMode = SaveType.None;
+
+		[SerializeField]
+		protected string playerPrefsKey;
+
+		protected virtual string JsonFilePath
 		{
-            //		picker.onHSVChanged.AddListener(HSVChanged);
+			get { return Application.persistentDataPath + "/" + playerPrefsKey + ".json"; }
+		}
+
+		protected virtual void Reset()
+		{
+			playerPrefsKey = "colorpicker_" + GetInstanceID().ToString();
+		}
+
+		protected virtual void Awake()
+		{
+			picker.onHSVChanged.AddListener(HSVChanged);
 			picker.onValueChanged.AddListener(ColorChanged);
+			picker.CurrentColor = Color.white;
+			presetPrefab.SetActive(false);
+
+			presets.AddRange(predefinedPresets);
+			LoadPresets(saveMode);
 		}
 
-        public void CreatePresetButton()
+		public virtual void CreatePresetButton()
 		{
-            for (var i = 0; i < presets.Length; i++)
+			CreatePreset(picker.CurrentColor);
+		}
+
+		public virtual void LoadPresets(SaveType saveType)
 		{
-                if (!presets[i].activeSelf)
+			string jsonData = "";
+			switch (saveType)
 			{
-                    presets[i].SetActive(true);
-                    presets[i].GetComponent<Image>().color = picker.CurrentColor;
+				case SaveType.None:
 					break;
+				case SaveType.PlayerPrefs:
+					if (PlayerPrefs.HasKey(playerPrefsKey))
+					{
+						jsonData = PlayerPrefs.GetString(playerPrefsKey);
 					}
+					break;
+				case SaveType.JsonFile:
+					if (System.IO.File.Exists(JsonFilePath))
+					{
+						jsonData = System.IO.File.ReadAllText(JsonFilePath);
+					}
+					break;
+				default:
+					throw new System.NotImplementedException(saveType.ToString());
+			}	
+
+			if (!string.IsNullOrEmpty(jsonData))
+			{
+				try
+				{
+					var jsonColors = JsonUtility.FromJson<JsonColor>(jsonData);
+					presets.AddRange(jsonColors.colors);
+				}
+				catch (System.Exception e)
+				{
+					Debug.LogException(e);
 				}
 			}
 
-        public void PresetSelect(Image sender)
+			foreach (var item in presets)
+			{
+				CreatePreset(item, true);
+			}
+		}
+
+		public virtual void SavePresets(SaveType saveType)
+		{
+			if (presets == null || presets.Count <= 0)
+			{
+				Debug.LogError(
+					"presets cannot be null or empty: " + (presets == null ? "NULL" : "EMPTY"));
+				return;
+			}
+
+			var jsonColor = new JsonColor() {
+				colors = presets.ToArray()
+			};
+
+
+			string jsonData = JsonUtility.ToJson(jsonColor);
+
+			switch (saveType)
+			{
+				case SaveType.None:
+					Debug.LogWarning("Called SavePresets with SaveType = None...");
+					break;
+				case SaveType.PlayerPrefs:
+					PlayerPrefs.SetString(playerPrefsKey, jsonData);
+					break;
+				case SaveType.JsonFile:
+					System.IO.File.WriteAllText(JsonFilePath, jsonData);
+					Application.OpenURL(JsonFilePath);
+					break;
+				default:
+					throw new System.NotImplementedException(saveType.ToString());
+			}
+		}
+
+		protected class JsonColor
+		{
+			public Color[] colors;
+		}
+
+		public virtual void CreatePreset(Color color, bool loading)
+		{
+			createButton.gameObject.SetActive(presets.Count < maxPresets);
+
+			var newPresetButton = Instantiate(presetPrefab, presetPrefab.transform.parent);
+			newPresetButton.transform.SetAsLastSibling();
+			newPresetButton.SetActive(true);
+			newPresetButton.GetComponent<Image>().color = color;
+			
+			createPresetImage.color = Color.white;
+
+			if (!loading)
+			{
+				presets.Add(color);
+				SavePresets(saveMode);
+			}
+		}
+
+		public virtual void CreatePreset(Color color)
+		{
+			CreatePreset(color, false);
+		}
+
+		public virtual void PresetSelect(Image sender)
 		{
 			picker.CurrentColor = sender.color;
 		}
 
-        // Not working, it seems ConvertHsvToRgb() is broken. It doesn't work when fed
-        // input h, s, v as shown below.
-        //	private void HSVChanged(float h, float s, float v)
-        //	{
-        //		createPresetImage.color = HSVUtil.ConvertHsvToRgb(h, s, v, 1);
-        //	}
-        private void ColorChanged(Color color)
+		protected virtual void HSVChanged(float h, float s, float v)
+		{
+			createPresetImage.color = HSVUtil.ConvertHsvToRgb(h * 360, s, v, 1);
+			//Debug.Log("hsv util color: " + createPresetImage.color);
+		}
+
+		protected virtual void ColorChanged(Color color)
 		{
 			createPresetImage.color = color;
+			//Debug.Log("color changed: " + color);
 		}
 	}
 }

Scripts/Controls/ColorPicker/ColorSampler.cs

@@ -0,0 +1,70 @@
+namespace UnityEngine.UI.Extensions.ColorPicker
+{
+	/// <summary>
+	/// Samples colors from a screen capture. 
+	/// Warning! In the editor if you're not in Free aspect mode then 
+	/// the captured area includes the grey areas to the left and right of the game view window.
+	/// In a build this will not be an issue.
+	/// 
+	/// This does not work well with a world space UI as positioning is working with screen space.
+	/// </summary>
+	public class ColorSampler : MonoBehaviour
+	{
+		[SerializeField]
+		protected Button sampler;
+
+		[SerializeField]
+		protected Outline samplerOutline;
+
+		protected Texture2D screenCapture;
+
+		public ColorChangedEvent oncolorSelected = new ColorChangedEvent();
+
+		protected Color color;
+
+		protected virtual void OnEnable()
+		{
+			screenCapture = ScreenCapture.CaptureScreenshotAsTexture();
+			sampler.gameObject.SetActive(true);
+			sampler.onClick.AddListener(SelectColor);
+		}
+
+		protected virtual void OnDisable()
+		{
+			Destroy(screenCapture);
+			sampler.gameObject.SetActive(false);
+			sampler.onClick.RemoveListener(SelectColor);
+		}
+
+		protected virtual void Update()
+		{
+			if (screenCapture == null)
+				return;
+
+			sampler.transform.position = Input.mousePosition;
+			color = screenCapture.GetPixel((int)Input.mousePosition.x, (int)Input.mousePosition.y);
+		
+			HandleSamplerColoring();
+		}
+
+		protected virtual void HandleSamplerColoring()
+		{
+			sampler.image.color = color;
+
+			if (samplerOutline)
+			{
+				var c = Color.Lerp(Color.white, Color.black, color.grayscale > 0.5f ? 1 : 0);
+				c.a = samplerOutline.effectColor.a;
+				samplerOutline.effectColor = c;
+			}
+		}
+
+		protected virtual void SelectColor()
+		{
+			if (oncolorSelected != null)
+				oncolorSelected.Invoke(color);
+
+			enabled = false;
+		}
+	}
+}

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