DotNet 4.8.1 build of DotNetBar

PROMS/DotNetBar Source Code/AdvTree/Display/NodeExpandTriangleDisplay.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Text;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using DevComponents.DotNetBar;
+
+namespace DevComponents.AdvTree.Display
+{
+    internal class NodeExpandTriangleDisplay : NodeExpandDisplay
+    {
+        /// <summary>
+        /// Draw triangular type expand button.
+        /// </summary>
+        /// <param name="e">Expand button context information.</param>
+        public override void DrawExpandButton(NodeExpandPartRendererEventArgs e)
+        {
+            if (e.ExpandPartBounds.IsEmpty)
+                return;
+
+            SmoothingMode sm = e.Graphics.SmoothingMode;
+            e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
+            int pw = Dpi.Width5;
+            Rectangle r = new Rectangle(e.ExpandPartBounds.X , e.ExpandPartBounds.Y + (e.ExpandPartBounds.Height - 8) / 2, pw, Dpi.Height8);
+
+            GraphicsPath path = null;
+            if (e.Node.Expanded)
+            {
+                path = new GraphicsPath();
+                path.AddLine(r.X, r.Y + pw, r.X + pw, r.Y);
+                path.AddLine(r.X + pw, r.Y, r.X + pw, r.Y + pw);
+                path.CloseAllFigures();
+            }
+            else
+            {
+                path = new GraphicsPath();
+                path.AddLine(r.X, r.Y, r.X, r.Bottom);
+                path.AddLine(r.X, r.Bottom, r.X + Dpi.Width4, r.Y + r.Height / 2);
+                path.CloseAllFigures();
+            }
+
+            Brush brush = GetBackgroundBrush(e);
+            if (brush != null)
+            {
+                e.Graphics.FillPath(brush, path);
+                brush.Dispose();
+            }
+
+            Pen pen = GetBorderPen(e);
+            if(pen!=null)
+            {
+                e.Graphics.DrawPath(pen, path);
+                pen.Dispose();
+            }
+            e.Graphics.SmoothingMode = sm;
+            if(path!=null) path.Dispose();
+        }
+    }
+}