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using UnityEngine;
using System.Collections;
using UnityEngine.UI;
/* http://bobardo.com */
public class GalleryManager : MonoBehaviour {
public GameObject itemsContainer;
public GameObject[] items;
public ScrollRect scrollRect;
private float totalWidth;
private float mapSize;
private float scrollStep;
private float lastTimeScrollChanged;
private RuntimePlatform platform = Application.platform;
private bool isTouchOnScroll = false;
void Start()
{
mapSize = itemsContainer.GetComponent<RectTransform>().rect.height;
float width = Screen.width;
float pos = width / 2;
totalWidth = ((items.Length - 1) * mapSize) + width;
Utils.setSize(itemsContainer.GetComponent<RectTransform>(), totalWidth, mapSize);
for(int i = 0; i < items.Length; i++)
{
Utils.setSize(items[i].GetComponent<RectTransform>(), mapSize, mapSize);
items[i].transform.position = new Vector3(pos, items[i].transform.position.y, 0);
pos += mapSize;
}
scrollStep = (float) 1 / (items.Length - 1);
scrollRect.GetComponent<BoxCollider2D>().size = new Vector2(scrollRect.GetComponent<RectTransform>().rect.width, scrollRect.GetComponent<RectTransform>().rect.height);
showItem(0);
}
public void showItem(int number)
{
scrollRect.horizontalNormalizedPosition = (number * scrollStep) + 0.01f;
}
void Update()
{
if (platform == RuntimePlatform.Android || platform == RuntimePlatform.IPhonePlayer)
{
if (Input.touchCount > 0)
{
if (Input.GetTouch(0).phase == TouchPhase.Began)
{
clickedDown(Input.GetTouch(0).position);
}
else if (Input.GetTouch(0).phase == TouchPhase.Ended || Input.GetTouch(0).phase == TouchPhase.Canceled)
{
if (isTouchOnScroll)
{
isTouchOnScroll = false;
setScrollIndex();
}
}
}
}
else if (platform == RuntimePlatform.WindowsEditor)
{
if (Input.GetMouseButtonDown(0))
{
clickedDown(Input.mousePosition);
}
else if (Input.GetMouseButtonUp(0))
{
if (isTouchOnScroll)
{
isTouchOnScroll = false;
setScrollIndex();
}
}
}
}
private void clickedDown(Vector3 wp)
{
Vector2 touchPos = new Vector2(wp.x, wp.y);
Collider2D[] hit = Physics2D.OverlapPointAll(touchPos);
foreach (Collider2D h in hit)
{
if (h.GetComponent<ScrollRect>())
{
isTouchOnScroll = true;
return;
}
}
}
private void setScrollIndex()
{
if (scrollRect.horizontalNormalizedPosition < 0 || scrollRect.horizontalNormalizedPosition > 1) return;
int index = (int)(scrollRect.horizontalNormalizedPosition / scrollStep);
if (Mathf.Abs(scrollRect.horizontalNormalizedPosition) - (index * scrollStep) < ((index + 1) * scrollStep) - scrollRect.horizontalNormalizedPosition)
{
StartCoroutine(animateScroll(index * scrollStep));
}
else
{
StartCoroutine(animateScroll((index + 1) * scrollStep));
}
}
private IEnumerator animateScroll(float pos)
{
float dist = pos - scrollRect.horizontalNormalizedPosition;
float step = dist/10;
for(int i = 0; i < 10 && !isTouchOnScroll; i++)
{
scrollRect.horizontalNormalizedPosition += step;
yield return null;
}
}
public void onSliderValueChange(Vector2 pos)
{
for (int i = 0; i < items.Length; i++)
{
float scale = 1 - Mathf.Abs(Mathf.Abs(scrollRect.horizontalNormalizedPosition) - (i * scrollStep)) * 1.1f;
if (scale < 0.2f) scale = 0.2f;
items[i].transform.localScale = new Vector3(scale, scale, 1);
}
}
}
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