Implement Entity List Display and rework StorageComponent window (#4140)
* Create EntityListDisplay * Rework ClientStorage window * Add styling * Remove unnecessary colors * Rename list * Make scrollbar push content * Change children update a bit * Add old index * Localize ClientStorageComponent * Add size return * Remove spaces * Fix usings
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ShadowCommander
292
Content.Client/UserInterface/Controls/EntityListDisplay.cs
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292
Content.Client/UserInterface/Controls/EntityListDisplay.cs
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using Content.Client.Stylesheets;
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using JetBrains.Annotations;
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using Robust.Client.UserInterface;
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using Robust.Client.UserInterface.Controls;
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using Robust.Shared.GameObjects;
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using Robust.Shared.Maths;
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namespace Content.Client.UserInterface.Controls
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{
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public class EntityListDisplay : Control
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{
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public const string StylePropertySeparation = "separation";
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public int? SeparationOverride { get; set; }
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public Action<EntityUid, Control>? GenerateItem;
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public Action<EntityUid>? ItemPressed;
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private const int DefaultSeparation = 3;
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private readonly VScrollBar _vScrollBar;
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private List<EntityUid>? _entityUids;
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private int _count = 0;
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private float _itemHeight = 0;
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private float _totalHeight = 0;
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private int _topIndex = 0;
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private int _bottomIndex = 0;
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private bool _updateChildren = false;
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private bool _suppressScrollValueChanged;
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public int ScrollSpeedY { get; set; } = 50;
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private int ActualSeparation
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{
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get
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{
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if (TryGetStyleProperty(StylePropertySeparation, out int separation))
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{
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return separation;
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}
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return SeparationOverride ?? DefaultSeparation;
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}
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}
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public EntityListDisplay()
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{
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HorizontalExpand = true;
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VerticalExpand = true;
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RectClipContent = true;
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MouseFilter = MouseFilterMode.Pass;
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_vScrollBar = new VScrollBar
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{
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HorizontalExpand = false,
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HorizontalAlignment = HAlignment.Right
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};
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AddChild(_vScrollBar);
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_vScrollBar.OnValueChanged += ScrollValueChanged;
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}
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public void PopulateList(List<EntityUid> entities)
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{
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if (_count == 0 && entities.Count > 0)
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{
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EntityContainerButton control = new(entities[0]);
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GenerateItem?.Invoke(entities[0], control);
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control.Measure(Vector2.Infinity);
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_itemHeight = control.DesiredSize.Y;
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control.Dispose();
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}
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_count = entities.Count;
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_entityUids = entities;
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_updateChildren = true;
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InvalidateArrange();
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}
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private void OnItemPressed(BaseButton.ButtonEventArgs args)
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{
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if (args.Button is not EntityContainerButton button)
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return;
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ItemPressed?.Invoke(button.EntityUid);
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}
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[Pure]
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private Vector2 GetScrollValue()
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{
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var v = _vScrollBar.Value;
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if (!_vScrollBar.Visible)
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{
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v = 0;
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}
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return new Vector2(0, v);
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}
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protected override Vector2 ArrangeOverride(Vector2 finalSize)
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{
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var separation = (int) (ActualSeparation * UIScale);
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#region Scroll
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var cHeight = _totalHeight;
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var vBarSize = _vScrollBar.DesiredSize.X;
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var (sWidth, sHeight) = finalSize;
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try
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{
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// Suppress events to avoid weird recursion.
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_suppressScrollValueChanged = true;
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if (sHeight < cHeight)
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sWidth -= vBarSize;
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if (sHeight < cHeight)
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{
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_vScrollBar.Visible = true;
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_vScrollBar.Page = sHeight;
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_vScrollBar.MaxValue = cHeight;
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}
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else
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_vScrollBar.Visible = false;
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}
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finally
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{
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_suppressScrollValueChanged = false;
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}
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if (_vScrollBar.Visible)
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{
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_vScrollBar.Arrange(UIBox2.FromDimensions(Vector2.Zero, finalSize));
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}
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#endregion
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#region Rebuild Children
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/*
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* Example:
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*
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* var _itemHeight = 32;
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* var separation = 3;
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* 32 | 32 | Control.Size.Y 0
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* 35 | 3 | Padding
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* 67 | 32 | Control.Size.Y 1
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* 70 | 3 | Padding
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* 102 | 32 | Control.Size.Y 2
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* 105 | 3 | Padding
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* 137 | 32 | Control.Size.Y 3
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*
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* If viewport height is 60
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* visible should be 2 items (start = 0, end = 1)
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*
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* scroll.Y = 11
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* visible should be 3 items (start = 0, end = 2)
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*
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* start expected: 11 (item: 0)
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* var start = (int) (scroll.Y
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*
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* if (scroll == 32) then { start = 1 }
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* var start = (int) (scroll.Y + separation / (_itemHeight + separation));
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* var start = (int) (32 + 3 / (32 + 3));
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* var start = (int) (35 / 35);
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* var start = (int) (1);
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*
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* scroll = 0, height = 36
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* if (scroll + height == 36) then { end = 2 }
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* var end = (int) Math.Ceiling(scroll.Y + height / (_itemHeight + separation));
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* var end = (int) Math.Ceiling(0 + 36 / (32 + 3));
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* var end = (int) Math.Ceiling(36 / 35);
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* var end = (int) Math.Ceiling(1.02857);
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* var end = (int) 2;
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*
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*/
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var scroll = GetScrollValue();
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var oldTopIndex = _topIndex;
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_topIndex = (int) ((scroll.Y + separation) / (_itemHeight + separation));
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if (_topIndex != oldTopIndex)
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_updateChildren = true;
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var oldBottomIndex = _bottomIndex;
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_bottomIndex = (int) Math.Ceiling((scroll.Y + Height) / (_itemHeight + separation));
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_bottomIndex = Math.Min(_bottomIndex, _count);
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if (_bottomIndex != oldBottomIndex)
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_updateChildren = true;
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// When scrolling only rebuild visible list when a new item should be visible
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if (_updateChildren)
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{
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_updateChildren = false;
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foreach (var child in Children.ToArray())
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{
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if (child == _vScrollBar)
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continue;
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RemoveChild(child);
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}
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if (_entityUids != null)
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{
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for (var i = _topIndex; i < _bottomIndex; i++)
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{
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var entity = _entityUids[i];
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var button = new EntityContainerButton(entity);
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button.OnPressed += OnItemPressed;
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GenerateItem?.Invoke(entity, button);
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AddChild(button);
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}
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}
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_vScrollBar.SetPositionLast();
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}
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#endregion
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#region Layout Children
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// Use pixel position
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var pixelWidth = (int)(sWidth * UIScale);
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var offset = (int) -((scroll.Y - _topIndex * (_itemHeight + separation)) * UIScale);
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var first = true;
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foreach (var child in Children)
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{
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if (child == _vScrollBar)
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continue;
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if (!first)
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offset += separation;
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first = false;
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var size = child.DesiredPixelSize.Y;
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var targetBox = new UIBox2i(0, offset, pixelWidth, offset + size);
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child.ArrangePixel(targetBox);
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offset += size;
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}
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#endregion
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return finalSize;
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}
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protected override Vector2 MeasureOverride(Vector2 availableSize)
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{
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_vScrollBar.Measure(availableSize);
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availableSize.X -= _vScrollBar.DesiredSize.X;
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var constraint = new Vector2(availableSize.X, float.PositiveInfinity);
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var childSize = Vector2.Zero;
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foreach (var child in Children)
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{
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child.Measure(constraint);
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if (child == _vScrollBar)
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continue;
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childSize = Vector2.ComponentMax(childSize, child.DesiredSize);
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}
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_totalHeight = childSize.Y * _count + ActualSeparation * (_count - 1);
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return new Vector2(childSize.X, 0f);
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}
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private void ScrollValueChanged(Robust.Client.UserInterface.Controls.Range _)
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{
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if (_suppressScrollValueChanged)
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{
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return;
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}
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InvalidateArrange();
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}
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protected override void MouseWheel(GUIMouseWheelEventArgs args)
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{
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base.MouseWheel(args);
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_vScrollBar.ValueTarget -= args.Delta.Y * ScrollSpeedY;
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args.Handle();
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}
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}
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public class EntityContainerButton : ContainerButton
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{
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public EntityUid EntityUid;
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public EntityContainerButton(EntityUid entityUid)
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{
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EntityUid = entityUid;
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AddStyleClass(StyleNano.StyleClassStorageButton);
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}
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}
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}
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