using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Text.RegularExpressions; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Graphics; using MLEM.Formatting; using MLEM.Formatting.Codes; using MLEM.Input; using MLEM.Misc; using MLEM.Textures; using MLEM.Ui.Elements; using MLEM.Ui.Style; namespace MLEM.Ui { /// /// A ui system is the central location for the updating and rendering of all ui s. /// Each element added to the root of the ui system is assigned a that has additional data like a transformation matrix. /// For more information on how ui systems work, check out /// public class UiSystem : GameComponent { private readonly List rootElements = new List(); /// /// The viewport that this ui system is rendering inside of. /// This is automatically updated during /// public Rectangle Viewport; /// /// Set this field to true to cause the ui system and all of its elements to automatically scale up or down with greater and lower resolution, respectively. /// If this field is true, is used as the size that uses default /// public bool AutoScaleWithScreen; /// /// If is true, this is used as the screen size that uses the default /// public Point AutoScaleReferenceSize; private float globalScale = 1; /// /// The global rendering scale of this ui system and all of its child elements. /// If is true, this scale will be different based on the window size. /// public float GlobalScale { get { if (!this.AutoScaleWithScreen) return this.globalScale; return Math.Min(this.Viewport.Width / (float) this.AutoScaleReferenceSize.X, this.Viewport.Height / (float) this.AutoScaleReferenceSize.Y) * this.globalScale; } set { this.globalScale = value; foreach (var root in this.rootElements) root.Element.ForceUpdateArea(); } } private UiStyle style; /// /// The style options that this ui system and all of its elements use. /// To set the default, untextured style, use . /// public UiStyle Style { get => this.style; set { this.style = value; foreach (var root in this.rootElements) { root.Element.AndChildren(e => e.System = this); root.Element.ForceUpdateArea(); } } } /// /// The transparency (alpha value) that this ui system and all of its elements draw at. /// public float DrawAlpha = 1; /// /// The blend state that this ui system and all of its elements draw with /// public BlendState BlendState; /// /// The sampler state that this ui system and all of its elements draw with. /// The default is , as that is the one that works best with pixel graphics. /// public SamplerState SamplerState = SamplerState.PointClamp; /// /// The that this ui system's elements format their text with. /// To add new formatting codes to the ui system, add them to this formatter. /// public TextFormatter TextFormatter; /// /// The action that should be executed when a in a paragraph's is pressed. /// The actual link stored in the link code is stored in its 's 1st group. /// By default, the browser is opened with the given link's address. /// public Action LinkBehavior = l => Process.Start(new ProcessStartInfo(l.Match.Groups[1].Value) {UseShellExecute = true}); /// /// The that this ui system is controlled by. /// The ui controls are also the place to change bindings for controller and keyboard input. /// public UiControls Controls; /// /// Event that is invoked after an is drawn, but before its children are drawn. /// public Element.DrawCallback OnElementDrawn = (e, time, batch, alpha) => e.OnDrawn?.Invoke(e, time, batch, alpha); /// /// Event that is invoked after the for each root element is drawn, but before its children are drawn. /// public Element.DrawCallback OnSelectedElementDrawn; /// /// Event that is invoked when an is updated /// public Element.TimeCallback OnElementUpdated = (e, time) => e.OnUpdated?.Invoke(e, time); /// /// Event that is invoked when an is pressed with the primary action key /// public Element.GenericCallback OnElementPressed = e => e.OnPressed?.Invoke(e); /// /// Event that is invoked when an is pressed with the secondary action key /// public Element.GenericCallback OnElementSecondaryPressed = e => e.OnSecondaryPressed?.Invoke(e); /// /// Event that is invoked when an is newly selected using automatic navigation, or after it has been pressed with the mouse. /// public Element.GenericCallback OnElementSelected = e => e.OnSelected?.Invoke(e); /// /// Event that is invoked when an is deselected during the selection of a new element. /// public Element.GenericCallback OnElementDeselected = e => e.OnDeselected?.Invoke(e); /// /// Event that is invoked when the mouse enters an /// public Element.GenericCallback OnElementMouseEnter = e => e.OnMouseEnter?.Invoke(e); /// /// Event that is invoked when the mouse exits an /// public Element.GenericCallback OnElementMouseExit = e => e.OnMouseExit?.Invoke(e); /// /// Event that is invoked when an starts being touched /// public Element.GenericCallback OnElementTouchEnter = e => e.OnTouchEnter?.Invoke(e); /// /// Event that is invoked when an stops being touched /// public Element.GenericCallback OnElementTouchExit = e => e.OnTouchExit?.Invoke(e); /// /// Event that is invoked when an 's display area changes /// public Element.GenericCallback OnElementAreaUpdated = e => e.OnAreaUpdated?.Invoke(e); /// /// Event that is invoked when the that the mouse is currently over changes /// public Element.GenericCallback OnMousedElementChanged; /// /// Event that is invoked when the that is being touched changes /// public Element.GenericCallback OnTouchedElementChanged; /// /// Event that is invoked when the selected changes, either through automatic navigation, or by pressing on an element with the mouse /// public Element.GenericCallback OnSelectedElementChanged; /// /// Event that is invoked when a new is added to this ui system /// public RootCallback OnRootAdded; /// /// Event that is invoked when a is removed from this ui system /// public RootCallback OnRootRemoved; /// /// Creates a new ui system with the given settings. /// /// The game /// The style settings that this ui should have. Use for the default, untextured style. /// The input handler that this ui's should use. If none is supplied, a new input handler is created for this ui. /// If this value is set to true, the ui system's will be set automatically based on the 's size. Defaults to true. public UiSystem(Game game, UiStyle style, InputHandler inputHandler = null, bool automaticViewport = true) : base(game) { this.Controls = new UiControls(this, inputHandler); this.style = style; if (automaticViewport) { this.Viewport = new Rectangle(Point.Zero, game.Window.ClientBounds.Size); this.AutoScaleReferenceSize = this.Viewport.Size; game.Window.ClientSizeChanged += (sender, args) => { this.Viewport = new Rectangle(Point.Zero, game.Window.ClientBounds.Size); foreach (var root in this.rootElements) root.Element.ForceUpdateArea(); }; } if (TextInputWrapper.Current != null) TextInputWrapper.Current.AddListener(game.Window, (sender, key, character) => this.ApplyToAll(e => e.OnTextInput?.Invoke(e, key, character))); this.OnMousedElementChanged = e => this.ApplyToAll(t => t.OnMousedElementChanged?.Invoke(t, e)); this.OnTouchedElementChanged = e => this.ApplyToAll(t => t.OnTouchedElementChanged?.Invoke(t, e)); this.OnSelectedElementChanged = e => this.ApplyToAll(t => t.OnSelectedElementChanged?.Invoke(t, e)); this.OnSelectedElementDrawn = (element, time, batch, alpha) => { if (this.Controls.IsAutoNavMode && element.SelectionIndicator.HasValue()) { batch.Draw(element.SelectionIndicator, element.DisplayArea, Color.White * alpha, element.Scale / 2); } }; this.OnElementPressed += e => { if (e.OnPressed != null) e.ActionSound.Value?.Play(); }; this.OnElementSecondaryPressed += e => { if (e.OnSecondaryPressed != null) e.SecondActionSound.Value?.Play(); }; this.TextFormatter = new TextFormatter(); this.TextFormatter.Codes.Add(new Regex("]+))?>"), (f, m, r) => new LinkCode(m, r, 1 / 16F, 0.85F, t => this.Controls.MousedElement is Paragraph.Link l1 && l1.Token == t || this.Controls.TouchedElement is Paragraph.Link l2 && l2.Token == t)); } /// /// Update this ui system, querying the necessary events and updating each element's data. /// /// The game's time public override void Update(GameTime time) { this.Controls.Update(); for (var i = this.rootElements.Count - 1; i >= 0; i--) { this.rootElements[i].Element.Update(time); } } /// /// Draws any and other elements that draw onto rather than directly onto the screen. /// For drawing in this manner to work correctly, this method has to be called before your is cleared, and before everything else in your game is drawn. /// /// The game's time /// The sprite batch to use for drawing public void DrawEarly(GameTime time, SpriteBatch batch) { foreach (var root in this.rootElements) { if (!root.Element.IsHidden) root.Element.DrawEarly(time, batch, this.DrawAlpha * root.Element.DrawAlpha, this.BlendState, this.SamplerState, root.Transform); } } /// /// Draws any s onto the screen. /// Note that, when using s with a scroll bar, needs to be called as well. /// /// The game's time /// The sprite batch to use for drawing public void Draw(GameTime time, SpriteBatch batch) { foreach (var root in this.rootElements) { if (root.Element.IsHidden) continue; batch.Begin(SpriteSortMode.Deferred, this.BlendState, this.SamplerState, null, null, null, root.Transform); var alpha = this.DrawAlpha * root.Element.DrawAlpha; root.Element.DrawTransformed(time, batch, alpha, this.BlendState, this.SamplerState, root.Transform); batch.End(); } } /// /// Adds a new root element to this ui system and returns the newly created . /// Note that, when adding new elements that should be part of the same ui (like buttons on a panel), should be used. /// /// The name of the new root element /// The root element to add /// The newly created root element, or null if an element with the specified name already exists. public RootElement Add(string name, Element element) { if (this.IndexOf(name) >= 0) return null; var root = new RootElement(name, element, this); this.rootElements.Add(root); root.Element.AndChildren(e => { e.Root = root; e.System = this; root.OnElementAdded(e); e.SetAreaDirty(); }); this.OnRootAdded?.Invoke(root); this.SortRoots(); return root; } /// /// Removes the with the specified name, or does nothing if there is no such element. /// /// The name of the root element to remove public void Remove(string name) { var root = this.Get(name); if (root == null) return; this.rootElements.Remove(root); this.Controls.SelectElement(root, null); root.Element.AndChildren(e => { e.Root = null; e.System = null; root.OnElementRemoved(e); e.SetAreaDirty(); }); this.OnRootRemoved?.Invoke(root); } /// /// Finds the with the given name. /// /// The root element's name /// The root element with the given name, or null if no such element exists public RootElement Get(string name) { var index = this.IndexOf(name); return index < 0 ? null : this.rootElements[index]; } private int IndexOf(string name) { return this.rootElements.FindIndex(element => element.Name == name); } internal void SortRoots() { // Normal list sorting isn't stable, but ordering is var sorted = this.rootElements.OrderBy(root => root.Priority).ToArray(); this.rootElements.Clear(); this.rootElements.AddRange(sorted); } /// /// Returns an enumerable of all of the instances that this ui system holds. /// /// All of this ui system's root elements public IEnumerable GetRootElements() { for (var i = this.rootElements.Count - 1; i >= 0; i--) yield return this.rootElements[i]; } /// /// Applies the given action to all instances in this ui system recursively. /// Note that, when this method is invoked, all root elements and all of their children receive the . /// /// The action to execute on each element public void ApplyToAll(Action action) { foreach (var root in this.rootElements) root.Element.AndChildren(action); } /// /// A delegate used for callbacks that involve a /// /// The root element public delegate void RootCallback(RootElement root); } /// /// A root element is a wrapper around an that contains additional data. /// Root elements are only used for the element in each element tree that doesn't have a /// To create a new root element, use /// public class RootElement { /// /// The name of this root element /// public readonly string Name; /// /// The element that this root element represents. /// This is the only element in its family tree that does not have a . /// public readonly Element Element; /// /// The that this root element is a part of. /// public readonly UiSystem System; private float scale = 1; /// /// The scale of this root element. /// Note that, to change the scale of every root element, you can use /// public float Scale { get => this.scale; set { if (this.scale == value) return; this.scale = value; this.Element.ForceUpdateArea(); } } private int priority; /// /// The priority of this root element. /// A higher priority means the element will be updated first, as well as rendered on top. /// public int Priority { get => this.priority; set { this.priority = value; this.System.SortRoots(); } } /// /// The actual scale of this root element. /// This is a combination of this root element's as well as the ui system's . /// public float ActualScale => this.System.GlobalScale * this.Scale; /// /// The transformation that this root element (and all of its children) has. /// This transform is applied both to input, as well as to rendering. /// public Matrix Transform = Matrix.Identity; /// /// An inversion of /// public Matrix InvTransform => Matrix.Invert(this.Transform); /// /// The child element of this root element that is currently selected. /// If there is no selected element in this root, this value will be null. /// public Element SelectedElement => this.System.Controls.GetSelectedElement(this); /// /// Determines whether this root element contains any children that . /// This value is automatically calculated. /// public bool CanSelectContent { get; private set; } /// /// Event that is invoked when a is added to this root element or any of its children. /// public Element.GenericCallback OnElementAdded; /// /// Even that is invoked when a is removed rom this root element of any of its children. /// public Element.GenericCallback OnElementRemoved; internal RootElement(string name, Element element, UiSystem system) { this.Name = name; this.Element = element; this.System = system; this.OnElementAdded += e => { if (e.CanBeSelected) this.CanSelectContent = true; }; this.OnElementRemoved += e => { if (e.CanBeSelected && !this.Element.GetChildren(regardGrandchildren: true).Any(c => c.CanBeSelected)) this.CanSelectContent = false; }; } /// /// Selects the given element that is a child of this root element. /// Optionally, automatic navigation can be forced on, causing the to be drawn around the element. /// /// The element to select, or null to deselect the selected element. /// Whether automatic navigation should be forced on public void SelectElement(Element element, bool? autoNav = null) { this.System.Controls.SelectElement(this, element, autoNav); } /// /// Scales this root element's matrix based on the given scale and origin. /// /// The scale to use /// The origin to use for scaling, or null to use this root's element's center point public void ScaleOrigin(float scale, Vector2? origin = null) { this.Transform = Matrix.CreateScale(scale, scale, 1) * Matrix.CreateTranslation(new Vector3((1 - scale) * (origin ?? this.Element.DisplayArea.Center), 0)); } } }