/*

This class provides a simple color picker based on tQColorButton
by Harald Jedele, 23.03.01, GPL version 2 or any later version.

Copyright (C) FZI Forschungszentrum Informatik Karlsruhe
Copyright (C) 2013-2016 Torsten
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/>.

*/

// Author: Torsten <ttl@justmail.de>

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include "color-picker.h"

// Constructor with initial color as parameter
color_picker::color_picker (QColor old_color, QWidget *p)
  : QPushButton (p)
{
  m_color = old_color;
  setFlat (true);
  setFocusPolicy (Qt::NoFocus);  // no focus, would changes the color
  update_button ();
  connect (this, SIGNAL (clicked (void)), SLOT (select_color (void)));
}

// Slot for button clicked: select a new color using QColorDialog
void
color_picker::select_color (void)
{
  QColor new_color = QColorDialog::getColor (m_color);

  if (new_color.isValid () && new_color != m_color)
    {
      m_color = new_color;
      update_button ();
    }
}

// Draw the button with the actual color (using a stylesheet)
void
color_picker::update_button (void)
{
  // Is this the right place to look for a "foreground" color that would
  // provide a reasonable border for the color swatches?
  QWidget *p = parentWidget ();

  QString bordercolor
    = (p ? p->palette ().text ().color ().name () : QString ("#000000"));

  setStyleSheet (QString ("background-color: %1; border: 1px solid %2;")
                 .arg (m_color.name ())
                 .arg (bordercolor));

  repaint ();
}