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// This may look like C code, but it's really -*- C++ -*-
/*
 * Copyright (C) 2012 Emweb bvba, Kessel-Lo, Belgium.
 *
 * See the LICENSE file for terms of use.
 */
#ifndef WT_WNAVIGATION_BAR_H_
#define WT_WNAVIGATION_BAR_H_

#include <vector>

#include <Wt/WLink>
#include <Wt/WTemplate>

namespace Wt {

class WStackedWidget;
class WTable;

/*! \class WNavigationBar Wt/WNavigationBar Wt/WNavigationBar
 *  \brief A navigation bar
 *
 * \note WNavigationBar is currently only styled in the Bootstrap themes.
 */
class WT_API WNavigationBar : public WTemplate
{
public:
  /*! \brief Constructor.
   */
  WNavigationBar(WContainerWidget *parent = 0);

  /*! \brief Sets a title.
   *
   * The title may optionally link to a 'homepage'.
   */
  void setTitle(const WString& title, const WLink& link = WLink());

  /*! \brief Sets whether the navigation bar will respond to screen size.
   *
   * For screens that are less wide, the navigation bar can be
   * rendered different (more compact and allowing for vertical menu
   * layouts).
   */
  void setResponsive(bool responsive);

  /*! \brief Adds a menu to the navigation bar.
   *
   * Typically, a navigation bar will contain at least one menu which
   * implements the top-level navigation options allowed by the
   * navigation bar.
   *
   * The menu may be aligned to the left or to the right of the
   * navigation bar.
   */
  void addMenu(WMenu *menu, AlignmentFlag alignment = AlignLeft);

  /*! \brief Adds a form field to the navigation bar.
   *
   * In some cases, one may want to add a few form fields to the navigation
   * bar (e.g. for a compact login option).
   */
  void addFormField(WWidget *widget, AlignmentFlag alignment = AlignLeft);

  /*! \brief Adds a search widget to the navigation bar.
   *
   * This is not so different from addFormField(), except that the
   * form field may be styled differently to indicate a search
   * function.
   */
  void addSearch(WLineEdit *field, AlignmentFlag alignment = AlignLeft);

  /*! \brief Adds a widget to the navigation bar.
   *
   * Any other widget may be added to the navigation bar, although they may
   * require special CSS style to blend well with the navigation bar style.
   */
  void addWidget(WWidget *widget, AlignmentFlag alignment = AlignLeft);

protected:
  WInteractWidget *createCollapseButton();
  WInteractWidget *createExpandButton();

private:
  void expandContents();
  void collapseContents();
  void undoExpandContents();

  void addWrapped(WWidget *widget, AlignmentFlag alignment,
		  const char *wrapClass);
  void addWrapped(WWidget *widget, WWidget* parent, int role,
                  AlignmentFlag alignment);
  void align(WWidget *widget, AlignmentFlag alignment);

  bool animatedResponsive() const;
};

}

#endif // WT_WNAVIGATION_BAR_H_