navigation_widget.cpp

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/* Author: Dave Coleman */

#include "navigation_widget.h"
#include <QDebug>
#include <iostream>

namespace moveit_setup_assistant
{
// ******************************************************************************************
// CLASS
// ******************************************************************************************

NavigationWidget::NavigationWidget(QWidget* parent) : QListView(parent)
{
  setItemDelegate(new NavDelegate(this));
  setEditTriggers(QAbstractItemView::NoEditTriggers);

  // setAttribute(Qt::WA_MacShowFocusRect, false);

  // Set frame graphics
  setFrameShape(QFrame::StyledPanel);
  setFrameShadow(QFrame::Raised);
  setLineWidth(1);
  setMidLineWidth(0);

  // Hard code width and height
  setMaximumWidth(160);
  setMinimumWidth(160);
  setMinimumHeight(300);

  verticalScrollBar()->setPageStep(3);
  verticalScrollBar()->setSingleStep(1);

  model_ = new QStandardItemModel(this);
  setModel(model_);
}

void NavigationWidget::setNavs(const QList<QString>& navs)
{
  setModel(NULL);
  model_->clear();

  for (int i = 0; i < navs.size(); i++)
  {
    QStandardItem* item = new QStandardItem();
    item->setData(QVariant::fromValue(navs.at(i)), Qt::DisplayRole);
    item->setFlags(Qt::NoItemFlags);
    model_->appendRow(item);
  }

  setModel(model_);
}

void NavigationWidget::setEnabled(const int& index, bool enabled)
{
  if (enabled)
    model_->item(index)->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEditable | Qt::ItemIsDragEnabled |
                                  Qt::ItemIsDropEnabled | Qt::ItemIsEnabled);
  else
    model_->item(index)->setFlags(Qt::NoItemFlags);
}

void NavigationWidget::setSelected(const int& index)
{
  // First make sure item is enabled
  setEnabled(index, true);

  // Select one box from column 0, row index
  QModelIndex top = model_->index(index, 0, QModelIndex());
  QModelIndex bottom = model_->index(index, 0, QModelIndex());

  QItemSelection selection(top, bottom);
  selectionModel()->reset();  // set them all to deselected
  selectionModel()->select(selection, QItemSelectionModel::Select);
}

// ******************************************************************************************
// CLASS
// ******************************************************************************************

NavDelegate::NavDelegate(QObject* parent) : QStyledItemDelegate(parent)
{
}

QSize NavDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
{
  return QSize(option.rect.width(), 45);
}

void NavDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
  const bool isSelected = option.state & QStyle::State_Selected;

  // NavScreen tp = index.data().value<NavScreen>();
  QString nav_name = index.data().value<QString>();

  painter->save();

  QLinearGradient backgroundGradient(QPoint(option.rect.x(), option.rect.y()),
                                     QPoint(option.rect.x(), option.rect.y() + option.rect.height()));
  if (isSelected)
  {
    backgroundGradient.setColorAt(0, QColor(109, 164, 219));
    backgroundGradient.setColorAt(1, QColor(61, 138, 212));
    painter->fillRect(option.rect, QBrush(backgroundGradient));
  }
  else
  {
    backgroundGradient.setColorAt(0, QColor(245, 245, 245));
    backgroundGradient.setColorAt(1, QColor(240, 240, 240));
    painter->fillRect(option.rect, QBrush(backgroundGradient));
  }

  painter->setPen(QColor(225, 225, 225));
  if (isSelected)
  {
    painter->setPen(QColor(37, 105, 169));
    painter->drawLine(option.rect.bottomLeft(), option.rect.bottomRight());
    painter->setPen(Qt::transparent);
  }
  painter->drawLine(option.rect.topLeft(), option.rect.topRight());
  if (!isSelected)
  {
    painter->setPen(QColor(248, 248, 248));
    painter->drawLine(QPoint(option.rect.x(), option.rect.y() + 1),
                      QPoint(option.rect.x() + option.rect.width(), option.rect.y() + 1));
  }

  QRect textRect(option.rect.x() + 10, option.rect.y(), option.rect.width() - 10, option.rect.height());

  QFont textFont(painter->font());
  textFont.setPixelSize(14);  // Set font size
  painter->setFont(textFont);

  // Font color
  if (isSelected)
  {
    // Selected
    painter->setPen(QColor(229, 229, 229));
  }
  else if (index.flags().testFlag(Qt::NoItemFlags))
  {
    // Disabled font color if disabled
    painter->setPen(QColor(170, 170, 170));  // TODO: make this work
  }
  else
  {
    // Normal
    painter->setPen(QColor(69, 69, 69));
  }

  painter->drawText(textRect, Qt::AlignLeft | Qt::AlignVCenter, nav_name);

  painter->restore();
}
}