private void lbStyle_DrawItem(object sender, DrawItemEventArgs e)
{
const int PadX = 4;
const int Gap = 8; // gap between text and line
Doc.DashStyle item = (Doc.DashStyle)lbStyle.Items[e.Index];
if (item == Doc.DashStyle.None)
{
using (SolidBrush brush = new SolidBrush(e.ForeColor))
{
e.DrawBackground();
e.Graphics.DrawString("(None)", this.Font, brush, e.Bounds);
}
}
else
{
using (Pen pen = new Pen(e.ForeColor, (50 / 1440f) * e.Graphics.DpiY))
using (SolidBrush brush = new SolidBrush(e.BackColor))
{
pen.DashStyle = ToDashStyle(item);
e.Graphics.FillRectangle(brush, e.Bounds);
e.Graphics.DrawLine(pen, e.Bounds.Left + Gap / 2, e.Bounds.Top + e.Bounds.Height / 2, e.Bounds.Right - PadX, e.Bounds.Top + e.Bounds.Height / 2);
}
}
e.DrawFocusRectangle();
}
private DashStyle ToDashStyle(Doc.DashStyle style)
{
switch (style)
{
case Doc.DashStyle.Solid:
return(DashStyle.Solid);
case Doc.DashStyle.Dash:
return(DashStyle.Dash);
case Doc.DashStyle.Dot:
return(DashStyle.Dot);
case Doc.DashStyle.DashDot:
return(DashStyle.DashDot);
case Doc.DashStyle.DashDotDot:
return(DashStyle.DashDotDot);
default:
System.Diagnostics.Debug.Assert(false);
return(DashStyle.Custom);
}
}