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https://github.com/ppy/osu
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104 lines
3.5 KiB
C#
104 lines
3.5 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using osu.Framework.Graphics.Containers;
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using osu.Framework.Graphics;
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using osu.Framework.Bindables;
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using osu.Game.Resources.Localisation.Web;
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namespace osu.Game.Graphics.UserInterface.PageSelector
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{
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public partial class PageSelector : CompositeDrawable
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{
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public readonly BindableInt CurrentPage = new BindableInt { MinValue = 0, };
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public readonly BindableInt AvailablePages = new BindableInt(1) { MinValue = 1, };
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private readonly FillFlowContainer itemsFlow;
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private readonly PageSelectorPrevNextButton previousPageButton;
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private readonly PageSelectorPrevNextButton nextPageButton;
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public PageSelector()
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{
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AutoSizeAxes = Axes.Both;
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InternalChild = new FillFlowContainer
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{
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AutoSizeAxes = Axes.Both,
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Direction = FillDirection.Horizontal,
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Children = new Drawable[]
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{
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previousPageButton = new PageSelectorPrevNextButton(false, CommonStrings.PaginationPrevious)
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{
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Action = () => CurrentPage.Value -= 1,
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},
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itemsFlow = new FillFlowContainer
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{
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AutoSizeAxes = Axes.Both,
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Direction = FillDirection.Horizontal,
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},
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nextPageButton = new PageSelectorPrevNextButton(true, CommonStrings.PaginationNext)
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{
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Action = () => CurrentPage.Value += 1
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}
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}
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};
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}
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protected override void LoadComplete()
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{
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base.LoadComplete();
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CurrentPage.BindValueChanged(_ => Scheduler.AddOnce(redraw));
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AvailablePages.BindValueChanged(_ =>
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{
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CurrentPage.Value = 0;
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// AddOnce as the reset of CurrentPage may also trigger a redraw.
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Scheduler.AddOnce(redraw);
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}, true);
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}
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private void redraw()
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{
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if (CurrentPage.Value >= AvailablePages.Value)
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{
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CurrentPage.Value = AvailablePages.Value - 1;
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return;
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}
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previousPageButton.Enabled.Value = CurrentPage.Value != 0;
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nextPageButton.Enabled.Value = CurrentPage.Value < AvailablePages.Value - 1;
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itemsFlow.Clear();
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int totalPages = AvailablePages.Value;
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bool lastWasEllipsis = false;
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for (int i = 0; i < totalPages; i++)
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{
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int pageIndex = i;
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bool shouldShowPage = pageIndex == 0 || pageIndex == totalPages - 1 || Math.Abs(pageIndex - CurrentPage.Value) <= 2;
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if (shouldShowPage)
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{
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lastWasEllipsis = false;
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itemsFlow.Add(new PageSelectorPageButton(pageIndex + 1)
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{
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Action = () => CurrentPage.Value = pageIndex,
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Selected = CurrentPage.Value == pageIndex,
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});
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}
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else if (!lastWasEllipsis)
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{
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lastWasEllipsis = true;
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itemsFlow.Add(new PageEllipsis());
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}
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}
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}
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}
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}
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