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192 lines
4.8 KiB
192 lines
4.8 KiB
using System;
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using System.Collections.Generic;
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#if UNITY_2019_1_OR_NEWER
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using UnityEngine.UIElements;
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#else
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using UnityEngine.Experimental.UIElements;
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using UnityEngine.Experimental.UIElements.StyleEnums;
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#endif
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namespace UnityEditor.Collaboration
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{
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internal interface IPagerData
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{
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int curPage { get; }
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int totalPages { get; }
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PageChangeAction OnPageChanged { get; }
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}
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internal class PagerElement : VisualElement
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{
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IPagerData m_Data;
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readonly Label m_PageText;
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readonly Button m_DownButton;
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readonly Button m_UpButton;
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public PagerElement(IPagerData dataSource)
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{
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m_Data = dataSource;
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this.style.flexDirection = FlexDirection.Row;
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this.style.alignSelf = Align.Center;
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Add(m_DownButton = new Button(OnPageDownClicked) {text = "\u25c5 Newer"});
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m_DownButton.AddToClassList("PagerDown");
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m_PageText = new Label();
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m_PageText.AddToClassList("PagerLabel");
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Add(m_PageText);
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Add(m_UpButton = new Button(OnPageUpClicked) {text = "Older \u25bb"});
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m_UpButton.AddToClassList("PagerUp");
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UpdateControls();
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}
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void OnPageDownClicked()
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{
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CollabAnalytics.SendUserAction(CollabAnalytics.historyCategoryString, "NewerPage");
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m_Data.OnPageChanged(m_Data.curPage - 1);
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}
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void OnPageUpClicked()
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{
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CollabAnalytics.SendUserAction(CollabAnalytics.historyCategoryString, "OlderPage");
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m_Data.OnPageChanged(m_Data.curPage + 1);
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}
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public void Refresh()
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{
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UpdateControls();
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}
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void UpdateControls()
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{
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var curPage = m_Data.curPage;
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var totalPages = m_Data.totalPages;
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m_PageText.text = (curPage + 1) + " / " + totalPages;
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m_DownButton.SetEnabled(curPage > 0);
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m_UpButton.SetEnabled(curPage < totalPages - 1);
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}
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}
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internal enum PagerLocation
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{
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Top,
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Bottom,
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}
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internal class PagedListView : VisualElement, IPagerData
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{
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public const int DefaultItemsPerPage = 10;
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readonly VisualElement m_ItemContainer;
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readonly PagerElement m_PagerTop, m_PagerBottom;
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int m_PageSize = DefaultItemsPerPage;
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IEnumerable<VisualElement> m_Items;
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int m_TotalItems;
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int m_CurPage;
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public int pageSize
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{
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set { m_PageSize = value; }
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}
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public IEnumerable<VisualElement> items
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{
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set
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{
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m_Items = value;
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LayoutItems();
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}
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}
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public int totalItems
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{
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set
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{
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if (m_TotalItems == value)
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return;
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m_TotalItems = value;
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UpdatePager();
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}
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}
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public PageChangeAction OnPageChanged { get; set; }
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public PagedListView()
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{
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m_PagerTop = new PagerElement(this);
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m_ItemContainer = new VisualElement()
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{
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name = "PagerItems",
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};
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Add(m_ItemContainer);
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m_Items = new List<VisualElement>();
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m_PagerBottom = new PagerElement(this);
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}
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void LayoutItems()
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{
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m_ItemContainer.Clear();
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foreach (var item in m_Items)
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{
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m_ItemContainer.Add(item);
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}
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}
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void UpdatePager()
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{
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if (m_PagerTop.parent != this && totalPages > 1 && curPage > 0)
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Insert(0, m_PagerTop);
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if (m_PagerTop.parent == this && (totalPages <= 1 || curPage == 0))
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Remove(m_PagerTop);
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if (m_PagerBottom.parent != this && totalPages > 1)
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Add(m_PagerBottom);
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if (m_PagerBottom.parent == this && totalPages <= 1)
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Remove(m_PagerBottom);
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m_PagerTop.Refresh();
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m_PagerBottom.Refresh();
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}
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int pageCount
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{
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get
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{
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var pages = m_TotalItems / m_PageSize;
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if (m_TotalItems % m_PageSize > 0)
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pages++;
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return pages;
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}
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}
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public int curPage
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{
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get { return m_CurPage; }
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set
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{
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m_CurPage = value;
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UpdatePager();
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}
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}
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public int totalPages
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{
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get
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{
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var extraPage = 0;
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if (m_TotalItems % m_PageSize > 0)
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extraPage = 1;
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return m_TotalItems / m_PageSize + extraPage;
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}
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}
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}
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}
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