using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class ButtonUtil
{

	public static void TabSelected(GameObject btn, Transform container)
	{
		int count = container.childCount;
		for(int i=0; i<count; i++)
		{
			GameObject child = container.GetChild (i).gameObject;
			if (child == btn) {
				Selected (child);
			} else {
				Unselect (child);
			}
		}
	}

	public static void TabSelected(SelectItemRenderer item, Transform container)
	{
		int count = container.childCount;
		for(int i=0; i<count; i++)
		{
			SelectItemRenderer renderer = container.GetChild (i).GetComponent<SelectItemRenderer>();
			renderer.selected = (renderer == item);
		}
	}

	public static void TabSelected(int index, Transform container)
	{
		int count = container.childCount;
		for(int i=0; i<count; i++)
		{
			GameObject child = container.GetChild (i).gameObject;
			if (i == index) {
				Selected (child);
			} else {
				Unselect (child);
			}
		}
	}

	public static void Selected(GameObject btn)
	{
		Color color = Color.white;
		Image img = btn.GetComponent<Image> ();
		if(img != null)
		{
			color = img.color;
			color.a = 1f;
			img.color = color;
		}

		Text[] txtArr = btn.GetComponentsInChildren<Text> ();
		for(int i=0; i<txtArr.Length; i++)
		{
			Text txt = txtArr [i];
			color = txt.color;
			color.a = 1f;
			txt.color = color;
		}
	}

	public static void Unselect(GameObject btn)
	{
		float alpha = 96f / 255f;
		Color color = Color.white;
		Image img = btn.GetComponent<Image> ();
		if(img != null)
		{
			color = img.color;
			color.a = alpha;
			img.color = color;
		}

		Image[] imgArr = btn.GetComponentsInChildren<Image> ();
		for(int i=0; i<imgArr.Length; i++)
		{
			color = img.color;
			color.a = alpha;
			img.color = color;
		}

		Text[] txtArr = btn.GetComponentsInChildren<Text> ();
		for(int i=0; i<txtArr.Length; i++)
		{
			Text txt = txtArr [i];
			color = txt.color;
			color.a = alpha;
			txt.color = color;
		}
	}
}