mirror of
https://github.com/Ellpeck/MLEM.git
synced 2024-05-23 17:13:38 +02:00
524 lines
21 KiB
C#
524 lines
21 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Audio;
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using Microsoft.Xna.Framework.Graphics;
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using Microsoft.Xna.Framework.Input;
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using MLEM.Extensions;
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using MLEM.Input;
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using MLEM.Misc;
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using MLEM.Textures;
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using MLEM.Ui.Style;
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namespace MLEM.Ui.Elements {
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public abstract class Element {
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protected readonly List<Element> Children = new List<Element>();
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private readonly List<Element> sortedChildren = new List<Element>();
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protected List<Element> SortedChildren {
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get {
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this.UpdateSortedChildrenIfDirty();
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return this.sortedChildren;
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}
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}
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private Anchor anchor;
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private Vector2 size;
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private Vector2 offset;
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public Padding Padding;
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public Padding ScaledPadding => this.Padding * this.Scale;
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public Anchor Anchor {
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get => this.anchor;
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set {
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if (this.anchor == value)
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return;
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this.anchor = value;
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this.SetAreaDirty();
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}
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}
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public Vector2 Size {
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get => this.size;
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set {
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if (this.size == value)
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return;
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this.size = value;
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this.SetAreaDirty();
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}
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}
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public Vector2 ScaledSize => this.size * this.Scale;
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public Vector2 PositionOffset {
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get => this.offset;
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set {
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if (this.offset == value)
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return;
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this.offset = value;
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this.SetAreaDirty();
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}
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}
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public Vector2 ScaledOffset => this.offset * this.Scale;
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private Padding childPadding;
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public Padding ChildPadding {
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get => this.childPadding;
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set {
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if (this.childPadding == value)
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return;
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this.childPadding = value;
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this.SetAreaDirty();
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}
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}
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public RectangleF ChildPaddedArea => this.UnscrolledArea.Shrink(this.ScaledChildPadding);
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public Padding ScaledChildPadding => this.childPadding * this.Scale;
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public DrawCallback OnDrawn;
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public TimeCallback OnUpdated;
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public GenericCallback OnPressed;
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public GenericCallback OnSecondaryPressed;
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public GenericCallback OnSelected;
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public GenericCallback OnDeselected;
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public GenericCallback OnMouseEnter;
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public GenericCallback OnMouseExit;
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public TextInputCallback OnTextInput;
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public GenericCallback OnAreaUpdated;
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public OtherElementCallback OnMousedElementChanged;
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public OtherElementCallback OnSelectedElementChanged;
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public TabNextElementCallback GetTabNextElement;
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public GamepadNextElementCallback GetGamepadNextElement;
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private UiSystem system;
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public UiSystem System {
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get => this.system;
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internal set {
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this.system = value;
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if (this.system != null)
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this.InitStyle(this.system.Style);
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}
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}
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protected UiControls Controls => this.System.Controls;
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protected InputHandler Input => this.Controls.Input;
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public RootElement Root { get; internal set; }
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public float Scale => this.Root.ActualScale;
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public Element Parent { get; private set; }
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public bool IsMouseOver { get; private set; }
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public bool IsSelected { get; private set; }
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private bool isHidden;
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public bool IsHidden {
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get => this.isHidden;
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set {
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if (this.isHidden == value)
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return;
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this.isHidden = value;
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this.SetAreaDirty();
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}
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}
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public bool CanBeSelected = true;
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public bool CanBeMoused = true;
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public bool CanBePressed = true;
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public float DrawAlpha = 1;
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public bool SetHeightBasedOnChildren;
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public bool SetWidthBasedOnChildren;
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public bool CanAutoAnchorsAttach = true;
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private RectangleF area;
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public RectangleF UnscrolledArea {
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get {
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this.UpdateAreaIfDirty();
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return this.area;
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}
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}
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public RectangleF Area => this.UnscrolledArea.OffsetCopy(this.ScaledScrollOffset);
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public Vector2 ScrollOffset;
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public Vector2 ScaledScrollOffset => this.ScrollOffset * this.Scale;
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public RectangleF DisplayArea => this.Area.Shrink(this.ScaledPadding);
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private int priority;
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public int Priority {
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get => this.priority;
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set {
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this.priority = value;
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if (this.Parent != null)
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this.Parent.SetSortedChildrenDirty();
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}
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}
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private bool areaDirty;
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private bool sortedChildrenDirty;
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public StyleProp<NinePatch> SelectionIndicator;
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public StyleProp<SoundEffectInstance> ActionSound;
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public StyleProp<SoundEffectInstance> SecondActionSound;
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public Element(Anchor anchor, Vector2 size) {
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this.anchor = anchor;
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this.size = size;
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this.OnMouseEnter += element => this.IsMouseOver = true;
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this.OnMouseExit += element => this.IsMouseOver = false;
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this.OnSelected += element => this.IsSelected = true;
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this.OnDeselected += element => this.IsSelected = false;
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this.GetTabNextElement = (backward, next) => next;
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this.GetGamepadNextElement = (dir, next) => next;
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this.SetAreaDirty();
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}
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public T AddChild<T>(T element, int index = -1) where T : Element {
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if (index < 0 || index > this.Children.Count)
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index = this.Children.Count;
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this.Children.Insert(index, element);
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element.Parent = this;
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element.AndChildren(e => {
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e.Root = this.Root;
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e.System = this.System;
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if (this.Root != null)
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this.Root.OnElementAdded(e);
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});
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this.SetSortedChildrenDirty();
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this.SetAreaDirty();
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return element;
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}
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public void RemoveChild(Element element) {
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this.Children.Remove(element);
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element.Parent = null;
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element.AndChildren(e => {
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e.Root = null;
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e.System = null;
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if (this.Root != null)
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this.Root.OnElementRemoved(e);
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});
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this.SetSortedChildrenDirty();
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this.SetAreaDirty();
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}
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public void RemoveChildren(Func<Element, bool> condition = null) {
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for (var i = this.Children.Count - 1; i >= 0; i--) {
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var child = this.Children[i];
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if (condition == null || condition(child)) {
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this.RemoveChild(child);
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}
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}
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}
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public void SetSortedChildrenDirty() {
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this.sortedChildrenDirty = true;
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}
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public void UpdateSortedChildrenIfDirty() {
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if (this.sortedChildrenDirty)
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this.ForceUpdateSortedChildren();
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}
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public virtual void ForceUpdateSortedChildren() {
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this.sortedChildrenDirty = false;
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this.sortedChildren.Clear();
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this.sortedChildren.AddRange(this.Children);
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this.sortedChildren.Sort((e1, e2) => e1.Priority.CompareTo(e2.Priority));
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}
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public void SetAreaDirty() {
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this.areaDirty = true;
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if (this.Parent != null && (this.Anchor >= Anchor.AutoLeft || this.Parent.SetWidthBasedOnChildren || this.Parent.SetHeightBasedOnChildren))
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this.Parent.SetAreaDirty();
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}
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public void UpdateAreaIfDirty() {
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if (this.areaDirty)
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this.ForceUpdateArea();
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}
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public virtual void ForceUpdateArea() {
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this.areaDirty = false;
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if (this.IsHidden)
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return;
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var parentArea = this.Parent != null ? this.Parent.ChildPaddedArea : (RectangleF) this.system.Viewport;
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var parentCenterX = parentArea.X + parentArea.Width / 2;
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var parentCenterY = parentArea.Y + parentArea.Height / 2;
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var actualSize = this.CalcActualSize(parentArea);
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var pos = new Vector2();
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switch (this.anchor) {
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case Anchor.TopLeft:
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case Anchor.AutoLeft:
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case Anchor.AutoInline:
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case Anchor.AutoInlineIgnoreOverflow:
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pos.X = parentArea.X + this.ScaledOffset.X;
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pos.Y = parentArea.Y + this.ScaledOffset.Y;
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break;
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case Anchor.TopCenter:
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case Anchor.AutoCenter:
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pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
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pos.Y = parentArea.Y + this.ScaledOffset.Y;
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break;
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case Anchor.TopRight:
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case Anchor.AutoRight:
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pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
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pos.Y = parentArea.Y + this.ScaledOffset.Y;
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break;
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case Anchor.CenterLeft:
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pos.X = parentArea.X + this.ScaledOffset.X;
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pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
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break;
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case Anchor.Center:
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pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
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pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
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break;
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case Anchor.CenterRight:
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pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
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pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
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break;
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case Anchor.BottomLeft:
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pos.X = parentArea.X + this.ScaledOffset.X;
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pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
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break;
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case Anchor.BottomCenter:
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pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
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pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
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break;
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case Anchor.BottomRight:
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pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
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pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
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break;
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}
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if (this.Anchor >= Anchor.AutoLeft) {
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Element previousChild;
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if (this.Anchor == Anchor.AutoInline || this.Anchor == Anchor.AutoInlineIgnoreOverflow) {
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previousChild = this.GetOlderSibling(e => !e.IsHidden && e.CanAutoAnchorsAttach);
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} else {
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previousChild = this.GetLowestOlderSibling(e => !e.IsHidden && e.CanAutoAnchorsAttach);
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}
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if (previousChild != null) {
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var prevArea = previousChild.GetAreaForAutoAnchors();
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switch (this.Anchor) {
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case Anchor.AutoLeft:
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case Anchor.AutoCenter:
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case Anchor.AutoRight:
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pos.Y = prevArea.Bottom + this.ScaledOffset.Y;
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break;
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case Anchor.AutoInline:
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var newX = prevArea.Right + this.ScaledOffset.X;
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if (newX + actualSize.X <= parentArea.Right) {
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pos.X = newX;
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pos.Y = prevArea.Y + this.ScaledOffset.Y;
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} else {
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pos.Y = prevArea.Bottom + this.ScaledOffset.Y;
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}
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break;
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case Anchor.AutoInlineIgnoreOverflow:
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pos.X = prevArea.Right + this.ScaledOffset.X;
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pos.Y = prevArea.Y;
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break;
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}
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}
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}
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this.area = new RectangleF(pos, actualSize);
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this.System.OnElementAreaUpdated?.Invoke(this);
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foreach (var child in this.Children)
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child.ForceUpdateArea();
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if (this.Children.Count > 0) {
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var changed = false;
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if (this.SetHeightBasedOnChildren) {
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var lowest = this.GetLowestChild(e => !e.IsHidden);
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if (lowest != null) {
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var newHeight = (lowest.UnscrolledArea.Bottom - pos.Y + this.ScaledChildPadding.Bottom) / this.Scale;
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if (!newHeight.Equals(this.size.Y, 0.01F)) {
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this.size.Y = newHeight;
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changed = true;
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}
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}
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}
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if (this.SetWidthBasedOnChildren) {
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var rightmost = this.GetRightmostChild(e => !e.IsHidden);
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if (rightmost != null) {
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var newWidth = (rightmost.UnscrolledArea.Right - pos.X + this.ScaledChildPadding.Right) / this.Scale;
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if (!newWidth.Equals(this.size.X, 0.01F)) {
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this.size.X = newWidth;
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changed = true;
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}
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}
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}
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if (changed)
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this.ForceUpdateArea();
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}
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}
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protected virtual Vector2 CalcActualSize(RectangleF parentArea) {
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return new Vector2(
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this.size.X > 1 ? this.ScaledSize.X : parentArea.Width * this.size.X,
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this.size.Y > 1 ? this.ScaledSize.Y : parentArea.Height * this.size.Y);
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}
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protected virtual RectangleF GetAreaForAutoAnchors() {
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return this.UnscrolledArea;
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}
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public Element GetLowestChild(Func<Element, bool> condition = null) {
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Element lowest = null;
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foreach (var child in this.Children) {
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if (condition != null && !condition(child))
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continue;
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if (child.Anchor > Anchor.TopRight && child.Anchor < Anchor.AutoLeft)
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continue;
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if (lowest == null || child.UnscrolledArea.Bottom >= lowest.UnscrolledArea.Bottom)
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lowest = child;
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}
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return lowest;
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}
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public Element GetRightmostChild(Func<Element, bool> condition = null) {
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Element rightmost = null;
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foreach (var child in this.Children) {
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if (condition != null && !condition(child))
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continue;
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if (child.Anchor < Anchor.AutoLeft && child.Anchor != Anchor.TopLeft && child.Anchor != Anchor.CenterLeft && child.Anchor != Anchor.BottomLeft)
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continue;
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if (rightmost == null || child.UnscrolledArea.Right >= rightmost.UnscrolledArea.Right)
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rightmost = child;
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}
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return rightmost;
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}
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public Element GetLowestOlderSibling(Func<Element, bool> condition = null) {
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if (this.Parent == null)
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return null;
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Element lowest = null;
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foreach (var child in this.Parent.Children) {
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if (child == this)
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break;
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if (condition != null && !condition(child))
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continue;
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if (lowest == null || child.UnscrolledArea.Bottom >= lowest.UnscrolledArea.Bottom)
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lowest = child;
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}
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return lowest;
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}
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public Element GetOlderSibling(Func<Element, bool> condition = null) {
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if (this.Parent == null)
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return null;
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Element older = null;
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foreach (var child in this.Parent.Children) {
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if (child == this)
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break;
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if (condition != null && !condition(child))
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continue;
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older = child;
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}
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return older;
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}
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public IEnumerable<Element> GetSiblings(Func<Element, bool> condition = null) {
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if (this.Parent == null)
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yield break;
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foreach (var child in this.Parent.Children) {
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if (condition != null && !condition(child))
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continue;
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if (child != this)
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yield return child;
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}
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}
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public IEnumerable<T> GetChildren<T>(Func<T, bool> condition = null, bool regardGrandchildren = false, bool ignoreFalseGrandchildren = false) where T : Element {
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foreach (var child in this.Children) {
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var applies = child is T t && (condition == null || condition(t));
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if (applies)
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yield return (T) child;
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if (regardGrandchildren && (!ignoreFalseGrandchildren || applies)) {
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foreach (var cc in child.GetChildren(condition, true, ignoreFalseGrandchildren))
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yield return cc;
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}
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}
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}
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public IEnumerable<Element> GetChildren(Func<Element, bool> condition = null, bool regardGrandchildren = false, bool ignoreFalseGrandchildren = false) {
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return this.GetChildren<Element>(condition, regardGrandchildren, ignoreFalseGrandchildren);
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}
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public IEnumerable<Element> GetParentTree() {
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if (this.Parent == null)
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yield break;
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yield return this.Parent;
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foreach (var parent in this.Parent.GetParentTree())
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yield return parent;
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}
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protected virtual List<Element> GetRelevantChildren() {
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return this.SortedChildren;
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}
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public virtual void Update(GameTime time) {
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this.System.OnElementUpdated?.Invoke(this, time);
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foreach (var child in this.GetRelevantChildren())
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if (child.System != null)
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child.Update(time);
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}
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public virtual void Draw(GameTime time, SpriteBatch batch, float alpha, BlendState blendState, SamplerState samplerState, Matrix matrix) {
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this.System.OnElementDrawn?.Invoke(this, time, batch, alpha);
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foreach (var child in this.GetRelevantChildren()) {
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if (!child.IsHidden)
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child.Draw(time, batch, alpha * child.DrawAlpha, blendState, samplerState, matrix);
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}
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}
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public virtual void DrawEarly(GameTime time, SpriteBatch batch, float alpha, BlendState blendState, SamplerState samplerState, Matrix matrix) {
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foreach (var child in this.GetRelevantChildren()) {
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if (!child.IsHidden)
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child.DrawEarly(time, batch, alpha * child.DrawAlpha, blendState, samplerState, matrix);
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}
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}
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public virtual Element GetElementUnderPos(Vector2 position) {
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if (this.IsHidden)
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return null;
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var children = this.GetRelevantChildren();
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for (var i = children.Count - 1; i >= 0; i--) {
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var element = children[i].GetElementUnderPos(position);
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if (element != null)
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return element;
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}
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return this.CanBeMoused && this.DisplayArea.Contains(position) ? this : null;
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}
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public void AndChildren(Action<Element> action) {
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action(this);
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foreach (var child in this.Children)
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child.AndChildren(action);
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}
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public void ReorderChildren(Comparison<Element> comparison) {
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this.Children.Sort(comparison);
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}
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public void ReverseChildren(int index = 0, int? count = null) {
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this.Children.Reverse(index, count ?? this.Children.Count);
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}
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protected virtual void InitStyle(UiStyle style) {
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this.SelectionIndicator.SetFromStyle(style.SelectionIndicator);
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this.ActionSound.SetFromStyle(style.ActionSound?.CreateInstance());
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this.SecondActionSound.SetFromStyle(style.ActionSound?.CreateInstance());
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}
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public delegate void TextInputCallback(Element element, Keys key, char character);
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public delegate void GenericCallback(Element element);
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public delegate void OtherElementCallback(Element thisElement, Element otherElement);
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public delegate void DrawCallback(Element element, GameTime time, SpriteBatch batch, float alpha);
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public delegate void TimeCallback(Element element, GameTime time);
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public delegate Element TabNextElementCallback(bool backward, Element usualNext);
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public delegate Element GamepadNextElementCallback(Direction2 dir, Element usualNext);
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}
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} |