com.unity.uiextensions/Scripts/HSVPicker/HsvBoxSelector.cs

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///Credit judah4
///Sourced from - http://forum.unity3d.com/threads/color-picker.267043/
using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;
public class HsvBoxSelector : MonoBehaviour, IDragHandler, IPointerDownHandler {
public HSVPicker picker;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
}
void PlaceCursor(PointerEventData eventData)
{
var pos = new Vector2(eventData.position.x - picker.hsvImage.rectTransform.position.x, picker.hsvImage.rectTransform.rect.height * picker.hsvImage.transform.lossyScale.y - (picker.hsvImage.rectTransform.position.y - eventData.position.y));
// Debug.Log(pos);
pos.x /= picker.hsvImage.rectTransform.rect.width * picker.hsvImage.transform.lossyScale.x;
pos.y /= picker.hsvImage.rectTransform.rect.height * picker.hsvImage.transform.lossyScale.y;
pos.x = Mathf.Clamp(pos.x, 0, .9999f); //1 is the same as 0
pos.y = Mathf.Clamp(pos.y, 0, .9999f);
//Debug.Log(pos);
picker.MoveCursor(pos.x, pos.y);
}
public void OnDrag(PointerEventData eventData)
{
PlaceCursor(eventData);
}
public void OnPointerDown(PointerEventData eventData)
{
PlaceCursor(eventData);
}
}