DotNet 4.8.1 build of DotNetBar

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

@@ -0,0 +1,47 @@
+using System.Drawing;
+using System.Drawing.Drawing2D;
+
+namespace DevComponents.Tree
+{
+	namespace Display
+	{
+		/// <summary>
+		/// Base class for node expand button display.
+		/// </summary>
+		public abstract class NodeExpandDisplay
+		{
+			/// <summary>Creates new instance of the class</summary>
+			public NodeExpandDisplay()
+			{
+			}
+
+			/// <summary>Draws expand button.</summary>
+			/// <param name="e">Context parameters for drawing expand button.</param>
+			public abstract void DrawExpandButton(NodeExpandPartRendererEventArgs e);
+
+			protected Pen GetBorderPen(NodeExpandPartRendererEventArgs e)
+			{
+                return new Pen(e.BorderColor, Dpi.Width1);
+			}
+
+			protected Pen GetExpandPen(NodeExpandPartRendererEventArgs e)
+			{
+				return new Pen(e.ExpandLineColor,Dpi.Width1);
+			}
+
+			protected Brush GetBackgroundBrush(NodeExpandPartRendererEventArgs e)
+			{
+				if(e.BackColor.IsEmpty && e.BackColor2.IsEmpty)
+					return null;
+
+				if(e.BackColor2.IsEmpty)
+					return new SolidBrush(e.BackColor);
+			
+				System.Drawing.Drawing2D.LinearGradientBrush brush=DisplayHelp.CreateLinearGradientBrush(e.ExpandPartBounds,e.BackColor,e.BackColor2,e.BackColorGradientAngle);
+				//brush.SetSigmaBellShape(0.8f);
+				return brush;
+			}
+		
+		}
+	}
+}