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using System.Windows.Forms;
using QuickRoute.BusinessEntities;
using System.Drawing;
namespace QuickRoute.Controls
{
public class GradientListBox : ListBox
{
private int nameWidth = 100;
private int namePadding = 8;
public GradientListBox()
{
DrawMode = DrawMode.OwnerDrawFixed;
this.ItemHeight = 20;
}
public int NameWidth
{
get { return nameWidth; }
set { nameWidth = value; }
}
public int NamePadding
{
get { return namePadding; }
set { namePadding = value; }
}
protected override void OnDrawItem(DrawItemEventArgs ea)
{
if (ea.Index != -1 && Items.Count > 0)
{
Gradient item = (Gradient)Items[ea.Index];
Bitmap backBufferBitmap = new Bitmap(ea.Bounds.Width, ea.Bounds.Height);
Graphics backBufferGraphics = Graphics.FromImage(backBufferBitmap);
backBufferGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
Brush b = new SolidBrush(BackColor);
ea.Graphics.FillRectangle(b, ea.Bounds);
b.Dispose();
ea.DrawBackground();
Rectangle rect = new Rectangle(4, 4, backBufferBitmap.Width - this.NameWidth-4, backBufferBitmap.Height-8);
Gradient.FillCheckerboardRectangle(backBufferGraphics, rect, 3);
item.Draw(backBufferGraphics, rect, 0, 1, Gradient.Direction.Horizontal);
backBufferGraphics.DrawRectangle(Pens.Black, new Rectangle(3, 3, backBufferBitmap.Width - this.NameWidth - 3, backBufferBitmap.Height - 7));
Color textColor;
if ((ea.State & DrawItemState.Selected).Equals(DrawItemState.Selected))
{
textColor = SystemColors.HighlightText;
}
else
{
textColor = this.ForeColor;
}
Size textSize = TextRenderer.MeasureText(backBufferGraphics, item.Name, this.Font);
Point textLocation = new Point(backBufferBitmap.Width - this.NameWidth + this.NamePadding, (ea.Bounds.Height - textSize.Height) / 2);
TextRenderer.DrawText(backBufferGraphics, item.Name, this.Font, textLocation, textColor);
ea.Graphics.DrawImage(backBufferBitmap, ea.Bounds.Location);
backBufferBitmap.Dispose();
backBufferGraphics.Dispose();
ea.DrawFocusRectangle();
base.OnDrawItem(ea);
}
}
}
}
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