/*

Copyright (C) 2011-2015 Michael Goffioul

This file is part of Octave.

Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <QLineEdit>

#include "Container.h"
#include "EditControl.h"
#include "TextEdit.h"
#include "QtHandlesUtils.h"

namespace QtHandles
{

EditControl*
EditControl::create (const graphics_object& go)
{
  Object* parent = Object::parentObject (go);

  if (parent)
    {
      Container* container = parent->innerContainer ();

      if (container)
        {
          uicontrol::properties& up = Utils::properties<uicontrol> (go);

          if ((up.get_max () - up.get_min ()) > 1)
            return new EditControl (go, new TextEdit (container));
          else
            return new EditControl (go, new QLineEdit (container));
        }
    }

  return 0;
}

EditControl::EditControl (const graphics_object& go, QLineEdit* edit)
     : BaseControl (go, edit), m_multiLine (false), m_textChanged (false)
{
  init (edit);
}

void
EditControl::init (QLineEdit* edit, bool callBase)
{
  if (callBase)
    BaseControl::init (edit, callBase);

  m_multiLine = false;
  initCommon (edit);

  uicontrol::properties& up = properties<uicontrol> ();

  edit->setText (Utils::fromStdString (up.get_string_string ()));
  edit->setAlignment (Utils::fromHVAlign (up.get_horizontalalignment (),
                                          up.get_verticalalignment ()));

  connect (edit, SIGNAL (textEdited (const QString&)),
           SLOT (textChanged (void)));
  connect (edit, SIGNAL (editingFinished (void)),
           SLOT (editingFinished (void)));
  connect (edit, SIGNAL (returnPressed (void)),
           SLOT (returnPressed (void)));
}

EditControl::EditControl (const graphics_object& go, TextEdit* edit)
  : BaseControl (go, edit), m_multiLine (true), m_textChanged (false)
{
  init (edit);
}

void
EditControl::init (TextEdit* edit, bool callBase)
{
  if (callBase)
    BaseControl::init (edit, callBase);

  m_multiLine = true;
  initCommon (edit);

  uicontrol::properties& up = properties<uicontrol> ();

  edit->setAcceptRichText (false);
  edit->setPlainText (Utils::fromStringVector (up.get_string_vector()).join("\n"));

  connect (edit, SIGNAL (textChanged (void)),
           SLOT (textChanged (void)));
  connect (edit, SIGNAL (editingFinished (void)),
           SLOT (editingFinished (void)));
  connect (edit, SIGNAL (returnPressed (void)),
           SLOT (returnPressed (void)));
}

EditControl::~EditControl (void)
{
}

void
EditControl::initCommon (QWidget*)
{
  m_textChanged = false;
}

void
EditControl::update (int pId)
{
  bool handled = false;

  if (m_multiLine)
    handled = updateMultiLine (pId);
  else
    handled = updateSingleLine (pId);

  if (! handled)
    {
      switch (pId)
        {
        default:
          BaseControl::update (pId);
          break;
        }
    }
}

bool
EditControl::updateSingleLine (int pId)
{
  uicontrol::properties& up = properties<uicontrol> ();
  QLineEdit* edit = qWidget<QLineEdit> ();

  switch (pId)
    {
    case uicontrol::properties::ID_STRING:
      edit->setText (Utils::fromStdString (up.get_string_string ()));
      return true;

    case uicontrol::properties::ID_HORIZONTALALIGNMENT:
    case uicontrol::properties::ID_VERTICALALIGNMENT:
      edit->setAlignment (Utils::fromHVAlign (up.get_horizontalalignment (),
                                              up.get_verticalalignment ()));
      return true;

    case uicontrol::properties::ID_MIN:
    case uicontrol::properties::ID_MAX:
      if ((up.get_max () - up.get_min ()) > 1)
        {
          QWidget* container = edit->parentWidget ();

          delete edit;
          init (new TextEdit (container), true);
        }
      return true;

    default:
      break;
    }

  return false;
}

bool
EditControl::updateMultiLine (int pId)
{
  uicontrol::properties& up = properties<uicontrol> ();
  TextEdit* edit = qWidget<TextEdit> ();

  switch (pId)
    {
    case uicontrol::properties::ID_STRING:
      edit->setPlainText (Utils::fromStringVector (up.get_string_vector()).join("\n"));
      return true;

    case uicontrol::properties::ID_MIN:
    case uicontrol::properties::ID_MAX:
      if ((up.get_max () - up.get_min ()) <= 1)
        {
          QWidget* container = edit->parentWidget ();

          delete edit;
          init (new QLineEdit (container), true);
        }
      return true;

    default:
      break;
    }

  return false;
}

void
EditControl::textChanged (void)
{
  m_textChanged = true;
}

void
EditControl::returnPressed (void)
{
  QString txt = (m_multiLine
                 ? qWidget<TextEdit> ()->toPlainText ()
                 : qWidget<QLineEdit> ()->text ());

  if (m_textChanged)
    {
      if (m_multiLine)
        gh_manager::post_set (m_handle, "string", Utils::toCellString(txt.split("\n")), false);
      else
        gh_manager::post_set (m_handle, "string", Utils::toStdString (txt), false);

      m_textChanged = false;
    }

  if (txt.length () > 0)
    gh_manager::post_callback (m_handle, "callback");
}

void
EditControl::editingFinished (void)
{
  if (m_textChanged)
    {
      QString txt = (m_multiLine
                     ? qWidget<TextEdit> ()->toPlainText ()
                     : qWidget<QLineEdit> ()->text ());
      if (m_multiLine)
        gh_manager::post_set (m_handle, "string", Utils::toCellString(txt.split("\n")), false);
      else
        gh_manager::post_set (m_handle, "string", Utils::toStdString (txt), false);
      gh_manager::post_callback (m_handle, "callback");

      m_textChanged = false;
    }
}

}; // namespace QtHandles