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