mirror of
https://github.com/ppy/osu
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108 lines
3.2 KiB
C#
108 lines
3.2 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 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.Framework.Extensions.IEnumerableExtensions;
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namespace osu.Game.Graphics.UserInterface.PageSelector
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{
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public class PageSelector : CompositeDrawable
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{
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public readonly BindableInt CurrentPage = new BindableInt(1);
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public readonly BindableInt MaxPages = new BindableInt(1);
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private readonly FillFlowContainer<DrawablePage> itemsFlow;
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private readonly PageSelectorButton previousPageButton;
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private readonly PageSelectorButton 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 PageSelectorButton(false, "prev")
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{
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Action = () => CurrentPage.Value -= 1,
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},
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itemsFlow = new FillFlowContainer<DrawablePage>
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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 PageSelectorButton(true, "next")
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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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MaxPages.BindValueChanged(_ => redraw());
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CurrentPage.BindValueChanged(page => onCurrentPageChanged(page.NewValue));
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redraw();
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}
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private void onCurrentPageChanged(int newPage)
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{
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if (newPage < 1)
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{
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CurrentPage.Value = 1;
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return;
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}
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if (newPage > MaxPages.Value)
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{
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CurrentPage.Value = MaxPages.Value;
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return;
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}
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itemsFlow.ForEach(page => page.Selected = page.Page == newPage);
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updateButtonsState();
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}
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private void redraw()
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{
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itemsFlow.Clear();
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if (MaxPages.Value < 1)
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{
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MaxPages.Value = 1;
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return;
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}
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for (int i = 1; i <= MaxPages.Value; i++)
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addDrawablePage(i);
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if (CurrentPage.Value == 1)
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CurrentPage.TriggerChange();
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else
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CurrentPage.Value = 1;
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}
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private void updateButtonsState()
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{
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int newPage = CurrentPage.Value;
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int maxPages = MaxPages.Value;
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previousPageButton.Enabled.Value = newPage != 1;
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nextPageButton.Enabled.Value = newPage != maxPages;
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}
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private void addDrawablePage(int page) => itemsFlow.Add(new DrawablePage(page)
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{
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Action = () => CurrentPage.Value = page,
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});
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}
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}
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