private void cmbCatalog_DrawItem(object sender, DrawItemEventArgs e)
{
if (e.Index < 0 || e.Index >= cmbCatalog.Items.Count)
{
return;
}
if (!(cmbCatalog.Items[e.Index] is GISDataComboItem))
{
return;
}
//DrawItemState.
GISDataComboItem item = (GISDataComboItem)cmbCatalog.Items[e.Index];
int level = item.Level;
if ((e.State & DrawItemState.ComboBoxEdit) == DrawItemState.ComboBoxEdit)
{
level = 0;
}
using (SolidBrush brush = new SolidBrush(Color.Black))
{
Rectangle rect = new Rectangle(e.Bounds.X + level * 11 + 18, e.Bounds.Y, e.Bounds.Width, e.Bounds.Height);
if ((e.State & DrawItemState.Selected) == DrawItemState.Selected &&
(e.State & DrawItemState.ComboBoxEdit) != DrawItemState.ComboBoxEdit)
{
brush.Color = Color.DarkBlue;
e.Graphics.FillRectangle(brush, rect);
brush.Color = Color.White;
}
else
{
brush.Color = Color.White;
e.Graphics.FillRectangle(brush, rect);
brush.Color = Color.Black;
}
try
{
Image image = _imageList.Images[item.ImageIndex];
e.Graphics.DrawImage(image, e.Bounds.X + level * 11 + 3, e.Bounds.Y, 16, 16);
}
catch
{
}
e.Graphics.DrawString(item.ToString(), cmbCatalog.Font, brush, e.Bounds.X + level * 11 + 40,
e.Bounds.Y + 2);
}
}
public void AddChildNode(GISDataComboItem exObject)
{
int index = cmbCatalog.SelectedIndex;
if (index == -1)
{
index = cmbCatalog.Items.Count - 1;
}
int level = ((GISDataComboItem)exObject).Level;
cmbCatalog.Items.Insert(index + 1,
new GISDataComboItem(exObject.Text, exObject.FullName, exObject.ImageIndex, level)
{
Tag = exObject.Tag
});
cmbCatalog.SelectedIndex = index + 1;
}
