73 lines
2.2 KiB
C#
73 lines
2.2 KiB
C#
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// Copyright 2016 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using UnityEngine;
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using System.Collections;
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using System.Collections.Generic;
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/// Provides pages to a PagedScrollRect.
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///
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/// Treats each child of the scroll rect as a page. The pages are ordered
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/// by their sibling index in the scene hierarchy.
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///
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/// Instead of allocating/deallocating pages, they are added and removed simply by
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/// setting them active/inactive.
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///
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public class ChildrenPageProvider : MonoBehaviour, IPageProvider {
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/// The pages, in order.
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/// The active page is moved to be the last sibling after the scroll rect
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/// is initialized, so we need to store the pages in
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/// a seprate list to maintain the correct order.
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private List<Transform> pages = new List<Transform>();
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/// The spacing between pages in local coordinates.
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[Tooltip("The spacing between pages.")]
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public float spacing = 2000.0f;
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public float GetSpacing() {
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return spacing;
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}
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public int GetNumberOfPages() {
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return pages.Count;
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}
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public RectTransform ProvidePage(int index) {
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Transform pageTransform = pages[index];
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RectTransform page = pageTransform.GetComponent<RectTransform>();
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Vector2 middleAnchor = new Vector2(0.5f, 0.5f);
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page.anchorMax = middleAnchor;
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page.anchorMin = middleAnchor;
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pageTransform.gameObject.SetActive(true);
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return page;
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}
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public void RemovePage(int index, RectTransform page) {
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page.gameObject.SetActive(false);
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}
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void Awake() {
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/// Disable all the pages to make sure
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/// none of them are visible initially before
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/// scrolling.
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foreach (Transform page in transform) {
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page.gameObject.SetActive(false);
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pages.Add(page);
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}
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}
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}
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