DotNet 4.8.1 build of DotNetBar

PROMS/DotNetBar Source Code/TreeGX/Display/NodeExpandRectDisplay.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Drawing;
+
+namespace DevComponents.Tree.Display
+{
+	/// <summary>
+	/// Represents class that paints rectangular expand button.
+	/// </summary>
+	public class NodeExpandRectDisplay:NodeExpandDisplay
+	{
+		/// <summary>
+		/// Draw rectangular type expand button.
+		/// </summary>
+		/// <param name="e">Expand button context information.</param>
+        public override void DrawExpandButton(NodeExpandPartRendererEventArgs e)
+        {
+            Rectangle expandPartBounds = e.ExpandPartBounds;
+            if (expandPartBounds.IsEmpty)
+                return;
+
+            expandPartBounds.Width--;
+            expandPartBounds.Height--;
+
+            Brush brush = GetBackgroundBrush(e);
+            if (brush != null)
+            {
+                e.Graphics.FillRectangle(brush, expandPartBounds);
+                brush.Dispose();
+            }
+
+            using (Pen pen = GetBorderPen(e))
+            {
+                e.Graphics.DrawRectangle(pen, expandPartBounds);
+            }
+
+            if (e.Node.Expanded)
+            {
+                using (Pen pen = GetExpandPen(e))
+                {
+                    e.Graphics.DrawLine(pen, expandPartBounds.X + 2, expandPartBounds.Y + expandPartBounds.Height / 2, expandPartBounds.Right - 2, expandPartBounds.Y + expandPartBounds.Height / 2);
+                }
+            }
+            else
+            {
+                using (Pen pen = GetExpandPen(e))
+                {
+                    e.Graphics.DrawLine(pen, expandPartBounds.X + 2, expandPartBounds.Y + expandPartBounds.Height / 2, expandPartBounds.Right - 2, expandPartBounds.Y + expandPartBounds.Height / 2);
+                    e.Graphics.DrawLine(pen, expandPartBounds.X + expandPartBounds.Width / 2, expandPartBounds.Y + 2, expandPartBounds.X + expandPartBounds.Width / 2, expandPartBounds.Bottom - 2);
+                }
+            }
+        }
+	}
+}