protected override void OnStart(System.IO.TextWriter writer)
{
// Add the outer group
_buttonGroup = GetHelper().ButtonGroup().Component;
if (Dropup)
{
_buttonGroup.AddCss(Css.Dropup);
}
_buttonGroup.Start(writer);
// Add the action button if split and copy over button CSS classes
// Also move the icon to the button (if one is present)
// But only create the split if we actually have some text to put in it
if (Split && !string.IsNullOrWhiteSpace(TextContent))
{
Button button = GetHelper().Button(TextContent).Component;
MoveIcons(button);
TextContent = null;
foreach (string cssClass in CssClasses)
{
button.CssClasses.Add(cssClass);
}
button.MergeAttributes(Attributes.Dictionary);
Attributes.Dictionary.Clear();
button.StartAndFinish(writer);
}
// Create the dropdown button, copy over CSS, add the text and caret, then render
Button dropdown = GetHelper().Button(buttonType: ButtonType.Button).Component;
MoveIcons(dropdown);
dropdown.AddCss(Css.Btn, Css.BtnDefault, Css.DropdownToggle);
dropdown.MergeAttribute("data-toggle", "dropdown");
foreach (string cssClass in CssClasses)
{
dropdown.CssClasses.Add(cssClass);
}
dropdown.MergeAttributes(Attributes.Dictionary);
Attributes.Dictionary.Clear();
CssClasses.Clear();
if (!string.IsNullOrWhiteSpace(TextContent))
{
dropdown.AddChild(GetHelper().Content(TextContent + " "));
}
else
{
Element element = GetHelper().Element("span").AddCss(Css.SrOnly).Component;
element.AddChild(GetHelper().Content("Toggle Dropdown"));
dropdown.AddChild(element);
}
dropdown.AddChild(GetHelper().Caret());
TextContent = null;
dropdown.StartAndFinish(writer);
// Add CSS and attributes after we've copied all the user-specified stuff to the buttons
MergeAttribute("role", "menu");
AddCss(Css.DropdownMenu);
base.OnStart(writer);
}