private void listBox1_MeasureItem(object sender, MeasureItemEventArgs e)
{
ListBox list = (ListBox)sender;
FormattedListItemWrapper item = list.Items[e.Index] as FormattedListItemWrapper;
if (item == null || item.Font == null)
{
e.ItemHeight = 15;
}
else
{
// Get the height from the current item's font.
Font font = item.Font;
e.ItemHeight = font.Height;
}
}
private void VariableOwnerDrawList_Load(object sender, EventArgs e)
{
InstalledFontCollection families = new InstalledFontCollection();
foreach (FontFamily family in families.Families)
{
try
{
Font font = new Font(family.Name, 12);
FormattedListItemWrapper item = new FormattedListItemWrapper(family.Name, font);
listBox1.Items.Add(item);
}
catch (ArgumentException err)
{
// Ignore fonts that don't support the default size.
}
}
}
private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
{
ListBox list = (ListBox)sender;
FormattedListItemWrapper item = list.Items[e.Index] as FormattedListItemWrapper;
Font font = null;
Color foreColor = Color.Empty;
Color backColor = Color.Empty;
if (item != null)
{
font = item.Font;
foreColor = item.ForeColor;
backColor = item.BackColor;
}
// Get the font from the current item.
// It could be null if there is no
// ListItemWrapper or the ListItemWrapper doesn't
// specify a font.
if (font == null)
{
// Use the ListBox font if no custom font is provided.
font = list.Font;
}
// Set the color. It could be empty if there is no
// ListItemWrapper or the ListItemWrapper doesn't
// specify a color.
Brush brush;
if (foreColor == Color.Empty)
{
// Use the default color.
brush = Brushes.Black;
}
else
{
// Use the custom color.
brush = new SolidBrush(item.ForeColor);
}
// Override the color if the item is selected.
// Alternatively, you could add SelectedForeColor and
// SelectedBackColor properties to the wrapper.
if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
{
brush = Brushes.White;
}
// Paint the background.
if (backColor == Color.Empty)
{
// Draw the background.
e.DrawBackground();
}
else
{
Brush brushBackground = new SolidBrush(item.BackColor);
e.Graphics.FillRectangle(brushBackground, e.Bounds);
}
// Get the item text.
string text = list.Items[e.Index].ToString();
// Draw the item text.
e.Graphics.DrawString(text, font,
brush, e.Bounds.X, e.Bounds.Y);
}
