/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive Team

  This program 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.

  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

***/

#include "colorpreviewbox.h"

#include <QPainter>

#include "common/qtutils.h"

namespace olive {

ColorPreviewBox::ColorPreviewBox(QWidget *parent) :
  QWidget(parent),
  to_ref_processor_(nullptr),
  to_display_processor_(nullptr)
{
}

void ColorPreviewBox::SetColorProcessor(ColorProcessorPtr to_ref, ColorProcessorPtr to_display)
{
  to_ref_processor_ = to_ref;
  to_display_processor_ = to_display;

  update();
}

void ColorPreviewBox::SetColor(const Color &c)
{
  color_ = c;
  update();
}

void ColorPreviewBox::paintEvent(QPaintEvent *e)
{
  QWidget::paintEvent(e);

  QColor c;

  // Color management
  if (to_ref_processor_ && to_display_processor_) {
    c = QtUtils::toQColor(to_display_processor_->ConvertColor(to_ref_processor_->ConvertColor(color_)));
  } else {
    c = QtUtils::toQColor(color_);
  }

  QPainter p(this);

  QRect draw_rect = rect().adjusted(0, 0, -1, -1);

  p.setPen(Qt::black);

  if (color_.alpha() < 1.0) {
    // Draw black background so the background isn't the window color
    p.setBrush(Qt::black);
    p.drawRect(draw_rect);
  }

  // Draw with color over the top
  p.setBrush(c);
  p.drawRect(draw_rect);
}

}
