public static Label CreateLabelHeader(Expander expander, string text, Color backColor, Image collapsedImage = null, Image expandedImage = null, Image icon = null, int height = 25, Font font = null)
{
var panel = new Panel();
panel.Height = height;
var headerLabel = new Label();
headerLabel.Text = text;
headerLabel.AutoSize = false;
if (font != null)
headerLabel.Font = font;
headerLabel.TextAlign = ContentAlignment.MiddleLeft;
if (collapsedImage != null && expandedImage != null)
{
headerLabel.Image = collapsedImage;
headerLabel.ImageAlign = ContentAlignment.MiddleRight;
}
headerLabel.BackColor = backColor;
headerLabel.Dock = DockStyle.Fill;
panel.Controls.Add(headerLabel);
if (icon != null)
{
var iconLabel = new Label();
iconLabel.Dock = DockStyle.Left;
iconLabel.Image = icon;
iconLabel.Width = height;
iconLabel.BackColor = backColor;
iconLabel.ImageAlign = ContentAlignment.MiddleLeft;
panel.Controls.Add(iconLabel);
}
if (collapsedImage != null && expandedImage != null)
{
expander.StateChanged += delegate { headerLabel.Image = expander.Expanded ? collapsedImage : expandedImage; };
}
headerLabel.Click += delegate { expander.Toggle(); };
expander.Header = panel;
return headerLabel;
}
