1 files changed, 125 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Element.cs b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Element.cs
new file mode 100644
index 0000000..0c364a9
--- /dev/null
+++ b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Element.cs
@@ -0,0 +1,125 @@
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Reflection;
+using System.Text.Json.Serialization;
+using Microsoft.Xna.Framework;
+using MonoGame.Extended.TextureAtlases;
+
+namespace MonoGame.Extended.Gui
+{
+    public class Binding
+    {
+        public Binding(object viewModel, string viewModelProperty, string viewProperty)
+        {
+            ViewModel = viewModel;
+            ViewModelProperty = viewModelProperty;
+            ViewProperty = viewProperty;
+        }
+
+        public object ViewModel { get; }
+        public string ViewModelProperty { get; }
+        public string ViewProperty { get; }
+    }
+
+    public abstract class Element
+    {
+        public string Name { get; set; }
+        public Point Position { get; set; }
+        public Point Origin { get; set; }
+        public Color BackgroundColor { get; set; }
+        public Color BorderColor { get; set; } = Color.White;
+        public int BorderThickness { get; set; } = 0;
+
+        private TextureRegion2D _backgroundRegion;
+        public TextureRegion2D BackgroundRegion
+        {
+            get => _backgroundRegion;
+            set
+            {
+                _backgroundRegion = value;
+
+                if (_backgroundRegion != null && BackgroundColor == Color.Transparent)
+                    BackgroundColor = Color.White;
+            }
+        }
+
+        public List<Binding> Bindings { get; } = new List<Binding>();
+
+        protected void OnPropertyChanged(string propertyName)
+        {
+            foreach (var binding in Bindings)
+            {
+                if (binding.ViewProperty == propertyName)
+                {
+                    var value = GetType()
+                        .GetTypeInfo()
+                        .GetDeclaredProperty(binding.ViewProperty)
+                        .GetValue(this);
+
+                    binding.ViewModel
+                        .GetType()
+                        .GetTypeInfo()
+                        .GetDeclaredProperty(binding.ViewModelProperty)
+                        .SetValue(binding.ViewModel, value);
+                }
+            }
+        }
+
+        private Size _size;
+        public Size Size
+        {
+            get => _size;
+            set
+            {
+                _size = value;
+                OnSizeChanged();
+            }
+        }
+
+        protected virtual void OnSizeChanged() { }
+
+        public int MinWidth { get; set; }
+        public int MinHeight { get; set; }
+        public int MaxWidth { get; set; } = int.MaxValue;
+        public int MaxHeight { get; set; } = int.MaxValue;
+
+        public int Width
+        {
+            get => Size.Width;
+            set => Size = new Size(value, Size.Height);
+        }
+
+        public int Height
+        {
+            get => Size.Height;
+            set => Size = new Size(Size.Width, value);
+        }
+
+        public Size ActualSize { get; internal set; }
+
+        public abstract void Draw(IGuiContext context, IGuiRenderer renderer, float deltaSeconds);
+    }
+
+    public abstract class Element<TParent> : Element, IRectangular
+        where TParent : IRectangular
+    {
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [JsonIgnore]
+        public TParent Parent { get; internal set; }
+
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        [JsonIgnore]
+        public Rectangle BoundingRectangle
+        {
+            get
+            {
+                var offset = Point.Zero;
+
+                if (Parent != null)
+                    offset = Parent.BoundingRectangle.Location;
+
+                return new Rectangle(offset + Position - ActualSize * Origin, ActualSize);
+            }
+        }
+    }
+}