/***

  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 "panel.h"

#include <QCloseEvent>
#include <QDebug>
#include <QHBoxLayout>
#include <QPainter>
#include <QStyle>
#include <QStyleOption>
#include <QVariant>

#include "panel/panelmanager.h"

namespace olive {

#define super KDDockWidgets::DockWidget

PanelWidget::PanelWidget(const QString &object_name) :
  super(object_name),
  border_visible_(false),
  signal_instead_of_close_(false)
{
  setFocusPolicy(Qt::ClickFocus);

  connect(this, &PanelWidget::shown, this, static_cast<void(PanelWidget::*)()>(&PanelWidget::setFocus));

  PanelManager::instance()->RegisterPanel(this);
}

PanelWidget::~PanelWidget()
{
  PanelManager::instance()->UnregisterPanel(this);
}

void PanelWidget::SetBorderVisible(bool enabled)
{
  border_visible_ = enabled;

  update();
}

void PanelWidget::SetTitle(const QString &t)
{
  title_ = t;
  UpdateTitle();
}

void PanelWidget::SetSubtitle(const QString &t)
{
  subtitle_ = t;
  UpdateTitle();
}

void PanelWidget::paintEvent(QPaintEvent *event)
{
  // Perform default behavior
  super::paintEvent(event);

  // Check if this panel (or a child of it) has focus using PanelFocusManager
  if (border_visible_) {

    // Draw a highlight border if so
    QPainter p(this);

    // We need to adjust the rect by 1 pixel since the bottom and right are "offscreen"
    QRect highlight_border = rect();
    highlight_border.adjust(0, 0, -1, -1);

    // Set the color to the palette's highlight color
    p.setPen(palette().highlight().color());

    // Draw the highlight border
    p.drawRect(highlight_border);
  }
}

void PanelWidget::UpdateTitle()
{
  // If there's no subtitle, just use the title. Otherwise, we set a formatted combination of the two that can
  // differ based on translation
  if (subtitle_.isEmpty()) {
    this->setTitle(title_);
  } else {
    this->setTitle(tr("%1: %2").arg(title_, subtitle_));
  }
}

void PanelWidget::SetSignalInsteadOfClose(bool e)
{
  signal_instead_of_close_ = e;
}

void PanelWidget::closeEvent(QCloseEvent *event)
{
  if (signal_instead_of_close_) {
    event->ignore();
    emit CloseRequested();
  } else {
    super::closeEvent(event);
  }
}

void PanelWidget::changeEvent(QEvent *e)
{
  if (e->type() == QEvent::LanguageChange) {
    Retranslate();
  }
  super::changeEvent(e);
}

void PanelWidget::Retranslate()
{
}

void PanelWidget::SetWidgetWithPadding(QWidget *widget)
{
  QWidget* wrapper = new QWidget();
  QHBoxLayout* layout = new QHBoxLayout(wrapper);
  layout->setContentsMargins(layout->contentsMargins() / 2);
  layout->addWidget(widget);
  setWidget(wrapper);
}

}
