public static ThumbnailToolbarButton CreateThumbnailToolbarButton(this Gtk.Action action,
Func <Gtk.Action, System.Drawing.Icon> icon_callback)
{
var button = new ThumbnailToolbarButton(id++)
{
DismissOnClick = false,
Tooltip = action.Label.Replace("_", ""),
Enabled = action.Sensitive,
Hidden = !action.Visible,
Icon = icon_callback != null?icon_callback(action) : null
};
button.Clicked += (o, e) => action.Activate();
action.AddNotification("icon-name", (o, args) => button.Icon = icon_callback != null ? icon_callback(action) : null);
action.AddNotification("stock-id", (o, args) => button.Icon = icon_callback != null ? icon_callback(action) : null);
action.AddNotification("tooltip", (o, args) => button.Tooltip = action.Label.Replace("_", ""));
action.AddNotification("sensitive", (o, args) => button.Enabled = action.Sensitive);
action.AddNotification("visible", (o, args) => button.Hidden = !action.Visible);
return(button);
}