144 lines
4.3 KiB
C#
144 lines
4.3 KiB
C#
using LemonUI.Elements;
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using System;
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using System.Drawing;
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namespace LemonUI.Menus
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{
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/// <summary>
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/// Basic elements for a slidable item.
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/// </summary>
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public abstract class NativeSlidableItem : NativeItem
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{
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#region Private Fields
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private bool alwaysVisible = false;
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#endregion
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#region Internal Fields
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/// <summary>
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/// The arrow pointing to the Left.
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/// </summary>
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[Obsolete("arrowLeft is Obsolete, use LeftArrow instead.")]
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internal protected ScaledTexture arrowLeft = null;
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/// <summary>
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/// The arrow pointing to the Right.
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/// </summary>
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[Obsolete("arrowRight is Obsolete, use RightArrow instead.")]
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internal protected ScaledTexture arrowRight = null;
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#endregion
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#region Public Properties
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/// <summary>
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/// The arrow pointing to the Left.
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/// </summary>
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public ScaledTexture LeftArrow { get; }
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/// <summary>
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/// The arrow pointing to the Right.
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/// </summary>
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public ScaledTexture RightArrow { get; }
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/// <summary>
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/// Whether the arrows should always be shown regardless of the visibility of the Item.
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/// </summary>
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public bool ArrowsAlwaysVisible
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{
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get => alwaysVisible;
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set
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{
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alwaysVisible = value;
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Recalculate();
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}
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}
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#endregion
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#region Constructors
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/// <summary>
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/// Creates a new item that can be sliden.
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/// </summary>
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/// <param name="title">The title of the Item.</param>
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/// <param name="description">The description of the Item.</param>
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public NativeSlidableItem(string title, string description) : base(title, description)
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{
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LeftArrow = new ScaledTexture(PointF.Empty, SizeF.Empty, "commonmenu", "arrowleft");
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RightArrow = new ScaledTexture(PointF.Empty, SizeF.Empty, "commonmenu", "arrowright");
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#pragma warning disable CS0618
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arrowLeft = LeftArrow;
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arrowRight = RightArrow;
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#pragma warning restore CS0618
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EnabledChanged += NativeSlidableItem_EnabledChanged;
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}
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#endregion
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#region Local Events
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private void NativeSlidableItem_EnabledChanged(object sender, EventArgs e) => Recalculate();
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#endregion
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#region Public Functions
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/// <summary>
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/// Recalculates the item positions and sizes with the specified values.
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/// </summary>
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/// <param name="pos">The position of the item.</param>
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/// <param name="size">The size of the item.</param>
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/// <param name="selected">If this item has been selected.</param>
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public override void Recalculate(PointF pos, SizeF size, bool selected)
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{
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base.Recalculate(pos, size, selected);
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LeftArrow.Size = (selected && Enabled) || ArrowsAlwaysVisible ? new SizeF(30, 30) : SizeF.Empty;
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RightArrow.Size = (selected && Enabled) || ArrowsAlwaysVisible ? new SizeF(30, 30) : SizeF.Empty;
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RightArrow.Position = new PointF(pos.X + size.Width - RightArrow.Size.Width - 5, pos.Y + 4);
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}
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/// <summary>
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/// Moves to the previous item.
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/// </summary>
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public abstract void GoLeft();
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/// <summary>
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/// Moves to the next item.
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/// </summary>
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public abstract void GoRight();
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/// <summary>
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/// Draws the left and right arrow.
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/// </summary>
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public override void Draw()
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{
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title.Draw();
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badgeLeft?.Draw();
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LeftArrow.Draw();
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RightArrow.Draw();
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}
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/// <inheritdoc/>
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public override void UpdateColors()
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{
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base.UpdateColors();
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if (!Enabled)
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{
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LeftArrow.Color = Colors.ArrowsDisabled;
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RightArrow.Color = Colors.ArrowsDisabled;
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}
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else if (lastSelected)
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{
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LeftArrow.Color = Colors.ArrowsHovered;
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RightArrow.Color = Colors.ArrowsHovered;
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}
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else
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{
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LeftArrow.Color = Colors.ArrowsNormal;
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RightArrow.Color = Colors.ArrowsNormal;
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}
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}
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#endregion
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}
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}
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