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Source/Editor/GUI/StyleValueEditor.cs

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+using System;
+using FlaxEditor.Windows;
+using FlaxEngine;
+using FlaxEngine.GUI;
+
+namespace FlaxEditor.GUI
+{
+    /// <summary>
+    /// Editor control for the UI style.
+    /// </summary>
+    /// <seealso cref="FlaxEngine.GUI.Control" />
+    [HideInEditor]
+    public class StyleValueEditor : Control
+    {
+        /// <summary>
+        /// Delegate function used for the change events handling.
+        /// </summary>
+        /// <param name="value">The selected value.</param>
+        /// <param name="sliding">True if user is using a slider, otherwise false.</param>
+        public delegate void ValueChangedEvent(Style value, bool sliding);
+
+        /// <summary>
+        /// True if slider is in use.
+        /// </summary>
+        protected bool _isSliding;
+
+        /// <summary>
+        /// The style.
+        /// </summary>
+        protected Style _value;
+
+        /// <summary>
+        /// The style
+        /// </summary>
+        public Style Value
+        {
+            get => _value;
+            set
+            {
+                if (_value == null || _value != value)
+                {
+                    _value = value;
+
+                    // Fire event
+                    ValueChanged?.Invoke();
+                }
+            }
+        }
+
+        /// <summary>
+        /// Fires when the style changes
+        /// </summary>
+        public event Action ValueChanged;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StyleValueEditor"/> class.
+        /// </summary>
+        public StyleValueEditor()
+        : base(0, 0, 32, 18)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StyleValueEditor"/> class.
+        /// </summary>
+        /// <param name="value">The initial value.</param>
+        /// <param name="x">The x location</param>
+        /// <param name="y">The y location</param>
+        public StyleValueEditor(Style value, float x, float y)
+        : base(x, y, 32, 18)
+        {
+            _value = value;
+        }
+
+        private void OnValueChanged(Style style, bool sliding)
+        {
+            // Force send ValueChanged event
+            if (_isSliding != sliding)
+            {
+                _value = null;
+            }
+
+            _isSliding = sliding;
+            Value = style;
+        }
+
+        /// <inheritdoc />
+        public override void Draw()
+        {
+            base.Draw();
+
+            var style = Style.Current;
+            var r = new Rectangle(2, 2, Width - 4, Height - 4);
+
+            if (Value != null)
+            {
+                // Draw the style colors
+                /*
+                -Background
+                -LightBackground
+                -DragWindow
+                -Foreground
+                -ForegroundDisabled
+                -BackgroundHighlighted
+                -BorderHighlighted
+                -BackgroundSelected
+                -BorderSelected
+                -BackgroundNormal
+                -BorderNormal
+                -TextBoxBackground
+                -TextBoxBackgroundSelected
+                -ProgressNormal
+                */
+
+                var size = new Vector2(r.Width / 7f, r.Height / 2f);
+                float x = 2;
+
+                Render2D.FillRectangle(new Rectangle(x, 2, size), Value.Foreground);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2, size), Value.ForegroundDisabled);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2, size), Value.DragWindow);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2, size), Value.BorderNormal);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2, size), Value.BorderHighlighted);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2, size), Value.BorderSelected);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2, size), Value.ProgressNormal);
+                x = 2;
+
+                Render2D.FillRectangle(new Rectangle(x, 2 + size.Y, size), Value.Background);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2 + size.Y, size), Value.BackgroundNormal);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2 + size.Y, size), Value.LightBackground);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2 + size.Y, size), Value.BackgroundHighlighted);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2 + size.Y, size), Value.BackgroundSelected);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2 + size.Y, size), Value.TextBoxBackground);
+                x += size.X;
+                Render2D.FillRectangle(new Rectangle(x, 2 + size.Y, size), Value.TextBoxBackgroundSelected);
+            }
+            else
+            {
+                Render2D.FillRectangle(r, Style.Current.BackgroundNormal);
+            }
+
+            Render2D.DrawRectangle(r, IsMouseOver ? style.BackgroundSelected : style.Background);
+
+            if (_value == null)
+            {
+                Rectangle textRectangle = r;
+                textRectangle.X = 4;
+                Render2D.DrawText(style.FontMedium, "No Style", textRectangle, style.Foreground);
+            }
+        }
+
+        /// <inheritdoc />
+        public override bool OnMouseUp(Vector2 location, MouseButton button)
+        {
+            if (Value == null)
+            {
+                Value = Editor.Instance.Options.CreateDefaultStyle();
+            }
+
+            var editorWindow = new StyleEditorWindow(Editor.Instance, this.Value, OnValueChanged, true);
+            editorWindow.Show();
+
+            return base.OnMouseUp(location, button);
+        }
+    }
+}