celesteia archive, last updated april 9th 2024

Signed-off-by: hazel <hazel@hazelthats.me>

1 files changed, 53 insertions, 0 deletions

diff --git a/source/ui/elements/Element.cs b/source/ui/elements/Element.cs
new file mode 100644
index 0000000..b95a693
--- /dev/null
+++ b/source/ui/elements/Element.cs
@@ -0,0 +1,53 @@
+using System;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace Celesteia.UI.Elements {
+    public class Element : IElement
+    {
+        private bool _enabled = true;
+        private Rect _rect;
+        private bool _isMouseOver;
+        private IContainer _parent;
+        private Vector2 _pivot;
+
+        public virtual bool GetEnabled() => _enabled && (_parent == null || _parent.GetEnabled());
+        public virtual IContainer GetParent() => _parent;
+        public virtual Vector2 GetPivot() => _pivot;
+        public virtual Rect GetRect() => _rect;
+        public virtual void MoveTo(Point point) {
+            _rect.SetX(AbsoluteUnit.WithValue(point.X));
+            _rect.SetY(AbsoluteUnit.WithValue(point.Y));
+        }
+
+        // Get element rectangle with pivot.
+        public virtual Rectangle GetRectangle() {
+            Rectangle r = GetRect().ResolveRectangle();
+
+            if (GetParent() != null) {
+                r.X += GetParent().GetRectangle().X;
+                r.Y += GetParent().GetRectangle().Y;
+            }
+
+            r.X -= (int)MathF.Round(_pivot.X * r.Width);
+            r.Y -= (int)MathF.Round(_pivot.Y * r.Height);
+            
+            return r;
+        }
+
+        // Interface setters.
+        public virtual bool SetEnabled(bool value) => _enabled = value;
+        public virtual void SetParent(IContainer container) => _parent = container;
+        public virtual void SetPivot(Vector2 pivot) => _pivot = pivot;
+        public virtual void SetRect(Rect rect) => _rect = rect;
+
+        // Mouse functions
+        public virtual void OnMouseIn() => _isMouseOver = true;
+        public virtual void OnMouseOut() => _isMouseOver = false;
+        public virtual bool GetMouseOver() => _isMouseOver;
+
+        // Engine functions.
+        public virtual void Update(GameTime gameTime, out bool clickedAnything) { clickedAnything = false; }
+        public virtual void Draw(SpriteBatch spriteBatch) { }
+    }
+}
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