mirror of
https://github.com/Ellpeck/MLEM.git
synced 2024-11-16 18:53:12 +01:00
518 lines
No EOL
20 KiB
C#
518 lines
No EOL
20 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Diagnostics;
|
|
using System.Linq;
|
|
using Microsoft.Xna.Framework;
|
|
using Microsoft.Xna.Framework.Graphics;
|
|
using Microsoft.Xna.Framework.Input;
|
|
using MLEM.Extensions;
|
|
using MLEM.Input;
|
|
using MLEM.Misc;
|
|
using MLEM.Textures;
|
|
using MLEM.Ui.Style;
|
|
|
|
namespace MLEM.Ui.Elements {
|
|
public abstract class Element {
|
|
|
|
protected readonly List<Element> Children = new List<Element>();
|
|
private readonly List<Element> sortedChildren = new List<Element>();
|
|
protected List<Element> SortedChildren {
|
|
get {
|
|
this.UpdateSortedChildrenIfDirty();
|
|
return this.sortedChildren;
|
|
}
|
|
}
|
|
private Anchor anchor;
|
|
private Vector2 size;
|
|
private Vector2 offset;
|
|
public Padding Padding;
|
|
public Padding ScaledPadding => this.Padding * this.Scale;
|
|
public Anchor Anchor {
|
|
get => this.anchor;
|
|
set {
|
|
if (this.anchor == value)
|
|
return;
|
|
this.anchor = value;
|
|
this.SetAreaDirty();
|
|
}
|
|
}
|
|
public Vector2 Size {
|
|
get => this.size;
|
|
set {
|
|
if (this.size == value)
|
|
return;
|
|
this.size = value;
|
|
this.SetAreaDirty();
|
|
}
|
|
}
|
|
public Vector2 ScaledSize => this.size * this.Scale;
|
|
public Vector2 PositionOffset {
|
|
get => this.offset;
|
|
set {
|
|
if (this.offset == value)
|
|
return;
|
|
this.offset = value;
|
|
this.SetAreaDirty();
|
|
}
|
|
}
|
|
public Vector2 ScaledOffset => this.offset * this.Scale;
|
|
private Padding childPadding;
|
|
public Padding ChildPadding {
|
|
get => this.childPadding;
|
|
set {
|
|
if (this.childPadding == value)
|
|
return;
|
|
this.childPadding = value;
|
|
this.SetAreaDirty();
|
|
}
|
|
}
|
|
public RectangleF ChildPaddedArea => this.UnscrolledArea.Shrink(this.ScaledChildPadding);
|
|
public Padding ScaledChildPadding => this.childPadding * this.Scale;
|
|
|
|
public DrawCallback OnDrawn;
|
|
public TimeCallback OnUpdated;
|
|
public GenericCallback OnPressed;
|
|
public GenericCallback OnSecondaryPressed;
|
|
public GenericCallback OnSelected;
|
|
public GenericCallback OnDeselected;
|
|
public GenericCallback OnMouseEnter;
|
|
public GenericCallback OnMouseExit;
|
|
public TextInputCallback OnTextInput;
|
|
public GenericCallback OnAreaUpdated;
|
|
public OtherElementCallback OnMousedElementChanged;
|
|
public OtherElementCallback OnSelectedElementChanged;
|
|
public TabNextElementCallback GetTabNextElement;
|
|
public GamepadNextElementCallback GetGamepadNextElement;
|
|
|
|
private UiSystem system;
|
|
public UiSystem System {
|
|
get => this.system;
|
|
internal set {
|
|
this.system = value;
|
|
if (this.system != null)
|
|
this.InitStyle(this.system.Style);
|
|
}
|
|
}
|
|
protected UiControls Controls => this.System.Controls;
|
|
protected InputHandler Input => this.Controls.Input;
|
|
public RootElement Root { get; internal set; }
|
|
public float Scale => this.Root.ActualScale;
|
|
public Element Parent { get; private set; }
|
|
public bool IsMouseOver { get; private set; }
|
|
public bool IsSelected { get; private set; }
|
|
private bool isHidden;
|
|
public bool IsHidden {
|
|
get => this.isHidden;
|
|
set {
|
|
if (this.isHidden == value)
|
|
return;
|
|
this.isHidden = value;
|
|
this.SetAreaDirty();
|
|
}
|
|
}
|
|
public bool CanBeSelected = true;
|
|
public bool CanBeMoused = true;
|
|
public float DrawAlpha = 1;
|
|
public bool SetHeightBasedOnChildren;
|
|
public bool SetWidthBasedOnChildren;
|
|
public bool CanAutoAnchorsAttach = true;
|
|
|
|
private RectangleF area;
|
|
public RectangleF UnscrolledArea {
|
|
get {
|
|
this.UpdateAreaIfDirty();
|
|
return this.area;
|
|
}
|
|
}
|
|
public RectangleF Area => this.UnscrolledArea.OffsetCopy(this.ScaledScrollOffset);
|
|
public Vector2 ScrollOffset;
|
|
public Vector2 ScaledScrollOffset => this.ScrollOffset * this.Scale;
|
|
public RectangleF DisplayArea => this.Area.Shrink(this.ScaledPadding);
|
|
private int priority;
|
|
public int Priority {
|
|
get => this.priority;
|
|
set {
|
|
this.priority = value;
|
|
if (this.Parent != null)
|
|
this.Parent.SetSortedChildrenDirty();
|
|
}
|
|
}
|
|
private bool areaDirty;
|
|
private bool sortedChildrenDirty;
|
|
public StyleProp<NinePatch> SelectionIndicator;
|
|
|
|
public Element(Anchor anchor, Vector2 size) {
|
|
this.anchor = anchor;
|
|
this.size = size;
|
|
|
|
this.OnMouseEnter += element => this.IsMouseOver = true;
|
|
this.OnMouseExit += element => this.IsMouseOver = false;
|
|
this.OnSelected += element => this.IsSelected = true;
|
|
this.OnDeselected += element => this.IsSelected = false;
|
|
this.GetTabNextElement = (backward, next) => next;
|
|
this.GetGamepadNextElement = (dir, next) => next;
|
|
|
|
this.SetAreaDirty();
|
|
}
|
|
|
|
public T AddChild<T>(T element, int index = -1) where T : Element {
|
|
if (index < 0 || index > this.Children.Count)
|
|
index = this.Children.Count;
|
|
this.Children.Insert(index, element);
|
|
element.Parent = this;
|
|
element.AndChildren(e => {
|
|
e.Root = this.Root;
|
|
e.System = this.System;
|
|
if (this.Root != null)
|
|
this.Root.OnElementAdded(e);
|
|
});
|
|
this.SetSortedChildrenDirty();
|
|
this.SetAreaDirty();
|
|
return element;
|
|
}
|
|
|
|
public void RemoveChild(Element element) {
|
|
this.Children.Remove(element);
|
|
element.Parent = null;
|
|
element.AndChildren(e => {
|
|
e.Root = null;
|
|
e.System = null;
|
|
if (this.Root != null)
|
|
this.Root.OnElementRemoved(e);
|
|
});
|
|
this.SetSortedChildrenDirty();
|
|
this.SetAreaDirty();
|
|
}
|
|
|
|
public void RemoveChildren(Func<Element, bool> condition = null) {
|
|
for (var i = this.Children.Count - 1; i >= 0; i--) {
|
|
var child = this.Children[i];
|
|
if (condition == null || condition(child)) {
|
|
this.RemoveChild(child);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void SetSortedChildrenDirty() {
|
|
this.sortedChildrenDirty = true;
|
|
}
|
|
|
|
public void UpdateSortedChildrenIfDirty() {
|
|
if (this.sortedChildrenDirty)
|
|
this.ForceUpdateSortedChildren();
|
|
}
|
|
|
|
public virtual void ForceUpdateSortedChildren() {
|
|
this.sortedChildrenDirty = false;
|
|
|
|
this.sortedChildren.Clear();
|
|
this.sortedChildren.AddRange(this.Children);
|
|
this.sortedChildren.Sort((e1, e2) => e1.Priority.CompareTo(e2.Priority));
|
|
}
|
|
|
|
public void SetAreaDirty() {
|
|
this.areaDirty = true;
|
|
if (this.Anchor >= Anchor.AutoLeft && this.Parent != null)
|
|
this.Parent.SetAreaDirty();
|
|
}
|
|
|
|
public void UpdateAreaIfDirty() {
|
|
if (this.areaDirty)
|
|
this.ForceUpdateArea();
|
|
}
|
|
|
|
public virtual void ForceUpdateArea() {
|
|
this.areaDirty = false;
|
|
if (this.IsHidden)
|
|
return;
|
|
|
|
var parentArea = this.Parent != null ? this.Parent.ChildPaddedArea : (RectangleF) this.system.Viewport;
|
|
var parentCenterX = parentArea.X + parentArea.Width / 2;
|
|
var parentCenterY = parentArea.Y + parentArea.Height / 2;
|
|
|
|
var actualSize = this.CalcActualSize(parentArea);
|
|
var pos = new Vector2();
|
|
|
|
switch (this.anchor) {
|
|
case Anchor.TopLeft:
|
|
case Anchor.AutoLeft:
|
|
case Anchor.AutoInline:
|
|
case Anchor.AutoInlineIgnoreOverflow:
|
|
pos.X = parentArea.X + this.ScaledOffset.X;
|
|
pos.Y = parentArea.Y + this.ScaledOffset.Y;
|
|
break;
|
|
case Anchor.TopCenter:
|
|
case Anchor.AutoCenter:
|
|
pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
|
|
pos.Y = parentArea.Y + this.ScaledOffset.Y;
|
|
break;
|
|
case Anchor.TopRight:
|
|
case Anchor.AutoRight:
|
|
pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
|
|
pos.Y = parentArea.Y + this.ScaledOffset.Y;
|
|
break;
|
|
case Anchor.CenterLeft:
|
|
pos.X = parentArea.X + this.ScaledOffset.X;
|
|
pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
|
|
break;
|
|
case Anchor.Center:
|
|
pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
|
|
pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
|
|
break;
|
|
case Anchor.CenterRight:
|
|
pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
|
|
pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
|
|
break;
|
|
case Anchor.BottomLeft:
|
|
pos.X = parentArea.X + this.ScaledOffset.X;
|
|
pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
|
|
break;
|
|
case Anchor.BottomCenter:
|
|
pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
|
|
pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
|
|
break;
|
|
case Anchor.BottomRight:
|
|
pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
|
|
pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
|
|
break;
|
|
}
|
|
|
|
if (this.Anchor >= Anchor.AutoLeft) {
|
|
Element previousChild;
|
|
if (this.Anchor == Anchor.AutoInline || this.Anchor == Anchor.AutoInlineIgnoreOverflow) {
|
|
previousChild = this.GetOlderSibling(e => !e.IsHidden && e.CanAutoAnchorsAttach);
|
|
} else {
|
|
previousChild = this.GetLowestOlderSibling(e => !e.IsHidden && e.CanAutoAnchorsAttach);
|
|
}
|
|
if (previousChild != null) {
|
|
var prevArea = previousChild.GetAreaForAutoAnchors();
|
|
switch (this.Anchor) {
|
|
case Anchor.AutoLeft:
|
|
case Anchor.AutoCenter:
|
|
case Anchor.AutoRight:
|
|
pos.Y = prevArea.Bottom + this.ScaledOffset.Y;
|
|
break;
|
|
case Anchor.AutoInline:
|
|
var newX = prevArea.Right + this.ScaledOffset.X;
|
|
if (newX + actualSize.X <= parentArea.Right) {
|
|
pos.X = newX;
|
|
pos.Y = prevArea.Y + this.ScaledOffset.Y;
|
|
} else {
|
|
pos.Y = prevArea.Bottom + this.ScaledOffset.Y;
|
|
}
|
|
break;
|
|
case Anchor.AutoInlineIgnoreOverflow:
|
|
pos.X = prevArea.Right + this.ScaledOffset.X;
|
|
pos.Y = prevArea.Y;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
this.area = new RectangleF(pos, actualSize);
|
|
this.System.OnElementAreaUpdated?.Invoke(this);
|
|
|
|
foreach (var child in this.Children)
|
|
child.ForceUpdateArea();
|
|
|
|
if (this.Children.Count > 0) {
|
|
var changed = false;
|
|
if (this.SetHeightBasedOnChildren) {
|
|
var lowest = this.GetLowestChild(e => !e.IsHidden);
|
|
if (lowest != null) {
|
|
var newHeight = (lowest.UnscrolledArea.Bottom - pos.Y + this.ScaledChildPadding.Bottom) / this.Scale;
|
|
if ((int) newHeight != (int) this.size.Y) {
|
|
this.size.Y = newHeight;
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
if (this.SetWidthBasedOnChildren) {
|
|
var rightmost = this.GetRightmostChild(e => !e.IsHidden);
|
|
if (rightmost != null) {
|
|
var newWidth = (rightmost.UnscrolledArea.Right - pos.X + this.ScaledChildPadding.Right) / this.Scale;
|
|
if ((int) newWidth != (int) this.size.X) {
|
|
this.size.X = newWidth;
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
if (changed)
|
|
this.ForceUpdateArea();
|
|
}
|
|
}
|
|
|
|
protected virtual Vector2 CalcActualSize(RectangleF parentArea) {
|
|
return new Vector2(
|
|
this.size.X > 1 ? this.ScaledSize.X : parentArea.Width * this.size.X,
|
|
this.size.Y > 1 ? this.ScaledSize.Y : parentArea.Height * this.size.Y);
|
|
}
|
|
|
|
protected virtual RectangleF GetAreaForAutoAnchors() {
|
|
return this.UnscrolledArea;
|
|
}
|
|
|
|
public Element GetLowestChild(Func<Element, bool> condition = null) {
|
|
Element lowest = null;
|
|
foreach (var child in this.Children) {
|
|
if (condition != null && !condition(child))
|
|
continue;
|
|
if (child.Anchor > Anchor.TopRight && child.Anchor < Anchor.AutoLeft)
|
|
continue;
|
|
if (lowest == null || child.UnscrolledArea.Bottom >= lowest.UnscrolledArea.Bottom)
|
|
lowest = child;
|
|
}
|
|
return lowest;
|
|
}
|
|
|
|
public Element GetRightmostChild(Func<Element, bool> condition = null) {
|
|
Element rightmost = null;
|
|
foreach (var child in this.Children) {
|
|
if (condition != null && !condition(child))
|
|
continue;
|
|
if (child.Anchor < Anchor.AutoLeft && child.Anchor != Anchor.TopLeft && child.Anchor != Anchor.CenterLeft && child.Anchor != Anchor.BottomLeft)
|
|
continue;
|
|
if (rightmost == null || child.UnscrolledArea.Right >= rightmost.UnscrolledArea.Right)
|
|
rightmost = child;
|
|
}
|
|
return rightmost;
|
|
}
|
|
|
|
public Element GetLowestOlderSibling(Func<Element, bool> condition = null) {
|
|
if (this.Parent == null)
|
|
return null;
|
|
Element lowest = null;
|
|
foreach (var child in this.Parent.Children) {
|
|
if (child == this)
|
|
break;
|
|
if (condition != null && !condition(child))
|
|
continue;
|
|
if (lowest == null || child.UnscrolledArea.Bottom >= lowest.UnscrolledArea.Bottom)
|
|
lowest = child;
|
|
}
|
|
return lowest;
|
|
}
|
|
|
|
public Element GetOlderSibling(Func<Element, bool> condition = null) {
|
|
if (this.Parent == null)
|
|
return null;
|
|
Element older = null;
|
|
foreach (var child in this.Parent.Children) {
|
|
if (child == this)
|
|
break;
|
|
if (condition != null && !condition(child))
|
|
continue;
|
|
older = child;
|
|
}
|
|
return older;
|
|
}
|
|
|
|
public IEnumerable<Element> GetSiblings(Func<Element, bool> condition = null) {
|
|
if (this.Parent == null)
|
|
yield break;
|
|
foreach (var child in this.Parent.Children) {
|
|
if (condition != null && !condition(child))
|
|
continue;
|
|
if (child != this)
|
|
yield return child;
|
|
}
|
|
}
|
|
|
|
public IEnumerable<T> GetChildren<T>(Func<T, bool> condition = null, bool regardGrandchildren = false, bool ignoreFalseGrandchildren = false) where T : Element {
|
|
foreach (var child in this.Children) {
|
|
var applies = child is T t && (condition == null || condition(t));
|
|
if (applies)
|
|
yield return (T) child;
|
|
if (regardGrandchildren && (!ignoreFalseGrandchildren || applies)) {
|
|
foreach (var cc in child.GetChildren(condition, true, ignoreFalseGrandchildren))
|
|
yield return cc;
|
|
}
|
|
}
|
|
}
|
|
|
|
public IEnumerable<Element> GetChildren(Func<Element, bool> condition = null, bool regardGrandchildren = false, bool ignoreFalseGrandchildren = false) {
|
|
return this.GetChildren<Element>(condition, regardGrandchildren, ignoreFalseGrandchildren);
|
|
}
|
|
|
|
public IEnumerable<Element> GetParentTree() {
|
|
if (this.Parent == null)
|
|
yield break;
|
|
yield return this.Parent;
|
|
foreach (var parent in this.Parent.GetParentTree())
|
|
yield return parent;
|
|
}
|
|
|
|
protected virtual List<Element> GetRelevantChildren() {
|
|
return this.SortedChildren;
|
|
}
|
|
|
|
public virtual void Update(GameTime time) {
|
|
this.System.OnElementUpdated?.Invoke(this, time);
|
|
|
|
foreach (var child in this.GetRelevantChildren())
|
|
if (child.System != null)
|
|
child.Update(time);
|
|
}
|
|
|
|
public virtual void Draw(GameTime time, SpriteBatch batch, float alpha, BlendState blendState, SamplerState samplerState, Matrix matrix) {
|
|
this.System.OnElementDrawn?.Invoke(this, time, batch, alpha);
|
|
|
|
foreach (var child in this.GetRelevantChildren()) {
|
|
if (!child.IsHidden)
|
|
child.Draw(time, batch, alpha * child.DrawAlpha, blendState, samplerState, matrix);
|
|
}
|
|
}
|
|
|
|
public virtual void DrawEarly(GameTime time, SpriteBatch batch, float alpha, BlendState blendState, SamplerState samplerState, Matrix matrix) {
|
|
foreach (var child in this.GetRelevantChildren()) {
|
|
if (!child.IsHidden)
|
|
child.DrawEarly(time, batch, alpha * child.DrawAlpha, blendState, samplerState, matrix);
|
|
}
|
|
}
|
|
|
|
public virtual Element GetElementUnderPos(Vector2 position) {
|
|
if (this.IsHidden)
|
|
return null;
|
|
var children = this.GetRelevantChildren();
|
|
for (var i = children.Count - 1; i >= 0; i--) {
|
|
var element = children[i].GetElementUnderPos(position);
|
|
if (element != null)
|
|
return element;
|
|
}
|
|
return this.CanBeMoused && this.DisplayArea.Contains(position) ? this : null;
|
|
}
|
|
|
|
public void AndChildren(Action<Element> action) {
|
|
action(this);
|
|
foreach (var child in this.Children)
|
|
child.AndChildren(action);
|
|
}
|
|
|
|
public void ReorderChildren(Comparison<Element> comparison) {
|
|
this.Children.Sort(comparison);
|
|
}
|
|
|
|
public void ReverseChildren(int index = 0, int? count = null) {
|
|
this.Children.Reverse(index, count ?? this.Children.Count);
|
|
}
|
|
|
|
protected virtual void InitStyle(UiStyle style) {
|
|
this.SelectionIndicator.SetFromStyle(style.SelectionIndicator);
|
|
}
|
|
|
|
public delegate void TextInputCallback(Element element, Keys key, char character);
|
|
|
|
public delegate void GenericCallback(Element element);
|
|
|
|
public delegate void OtherElementCallback(Element thisElement, Element otherElement);
|
|
|
|
public delegate void DrawCallback(Element element, GameTime time, SpriteBatch batch, float alpha);
|
|
|
|
public delegate void TimeCallback(Element element, GameTime time);
|
|
|
|
public delegate Element TabNextElementCallback(bool backward, Element usualNext);
|
|
|
|
public delegate Element GamepadNextElementCallback(Direction2 dir, Element usualNext);
|
|
|
|
}
|
|
} |