/// <summary>
/// Gets the effective PanelType, coalescing this.PanelType, the parent AccordionControl's DefaultPanelType,
/// and ContextStyles.Default.
/// </summary>
/// <returns>The first non-null PanelType.</returns>
private PanelTypes GetPanelType()
{
if (this.PanelType.HasValue)
{
return(this.PanelType.Value);
}
AccordionControl accordionControl = this.Parent as AccordionControl;
if (accordionControl != null && accordionControl.DefaultPanelType.HasValue)
{
return(accordionControl.DefaultPanelType.Value);
}
return(PanelTypes.Default);
}
/// <summary>
/// Renders the HTML contents of the control into the specified <paramref name="writer"/>.
/// </summary>
/// <param name="writer">A <see cref="T:System.Web.UI.HtmlTextWriter" /> that represents the output stream to render HTML content on the client.</param>
protected override void RenderContents(HtmlTextWriter writer)
{
AccordionPane pane = this.Parent as AccordionPane;
if (pane == null)
{
throw new System.InvalidCastException("AccordionContentHeaderPanel must be the child of an AccordionPane");
}
AccordionControl accordion = this.Parent.Parent as AccordionControl;
if (accordion == null)
{
throw new System.InvalidCastException("AccordionContentHeaderPanel must be the grandchild of an AccordionControl");
}
writer.AddAttribute(HtmlTextWriterAttribute.Class, "panel-title");
writer.RenderBeginTag(accordion.HeaderTagType);
writer.AddAttribute(HtmlTextWriterAttribute.Href, "#" + pane.BodyClientID);
writer.AddAttribute("role", "button");
writer.AddAttribute("data-toggle", "collapse");
// leave off data-parent if MultiSelectable is true on the AccordionControl
if (!accordion.MultiSelectable)
{
writer.AddAttribute("data-parent", "#" + accordion.ClientID);
}
// add ARIA markup
writer.AddAttribute("aria-expanded", StringHelper.ToLower(pane.Expanded));
writer.AddAttribute("aria-controls", pane.BodyClientID);
writer.RenderBeginTag(HtmlTextWriterTag.A);
base.RenderContents(writer);
writer.RenderEndTag();
writer.RenderEndTag();
}
