/**
  * @RDE_HEADER@
  * Interface
  * $Id$
  * $HeadURL$
  * $Author$
  */


// Own
#include "layer_control_widget.h"
#include <Map/map.h>
#include <Map/layer_parameter.h>
#include <Map/situation_map_utils.h>


// Qt
#include <QApplication>
#include <QLabel>
#include <QCheckBox>
#include <QPushButton>
#include <QSlider>
#include <QGridLayout>
#include <QDrag>
#include <QMimeData>
#include <QMouseEvent>
#include <QComboBox>
#include <QTimer>
#include <QBuffer>
#include <QToolButton>
#include <QSignalBlocker>
#include <cmath>



namespace SituationMap
{

const QLatin1String MIMETYPE("application/x-dndEsriLayerItemData");

//----------------------------------------------------------------------------
const char LayernameProperty[] = "layername";
//----------------------------------------------------------------------------



class DragableCheckBox : public QCheckBox
{
  Q_OBJECT
  using BaseClass = QCheckBox;

public:
  DragableCheckBox()  = default;
  explicit DragableCheckBox(const QString &text)
    : QCheckBox(text)
  {}

  ~DragableCheckBox() = default;

  void mousePressEvent(QMouseEvent *event) override;
  void mouseMoveEvent(QMouseEvent *event) override;

private:
  QPoint m_dragStartPos;
}; // class LayerControlWidget::Private
//-----------------------------------------------------------------------------

void DragableCheckBox::mousePressEvent(QMouseEvent *event)
{
//  qWarning() << LOGFUNCTION << " START";

  if (event->button() == Qt::LeftButton)
    m_dragStartPos = event->pos();

  BaseClass::mousePressEvent(event);

//  qWarning() << LOGFUNCTION << " END";
}

void DragableCheckBox::mouseMoveEvent(QMouseEvent *event)
{
//  qWarning() << LOGFUNCTION << " START";

  if (!(event->buttons() & Qt::LeftButton))
    return;
  if ((event->pos() - m_dragStartPos).manhattanLength()
      < QApplication::startDragDistance())
    return;

  QByteArray itemData;
  QDataStream dataStream(&itemData, QIODevice::WriteOnly);
  dataStream << this->property(LayernameProperty).toString();  // == layername

  QMimeData *mimeData = new QMimeData;
  mimeData->setData(MIMETYPE, itemData);

  QDrag *drag = new QDrag(this);
  drag->setMimeData(mimeData);

  drag->exec(Qt::MoveAction);

//  qWarning() << LOGFUNCTION << " END";
}
//-----------------------------------------------------------------------------

struct SliderStruct
{
  QCheckBox *cbOnOff        = nullptr;
  QSlider   *sl_opacity     = nullptr;
  QSlider   *sl_brightness  = nullptr;
  QSlider   *sl_contrast    = nullptr;
  QSlider   *sl_gamma       = nullptr;
};

class LayerControlWidget::Private
{

public:
  Private() = default;

  // OWN data:
  SituationMap::Map              *m_map = nullptr;  // Use INTERFACE
  QString                         m_debugInfo;

  bool                            m_zoomRotScaleEnabled = true;
  bool                            m_layerEnabled   = true;
  bool                            m_basemapEnabled = true;


  QVBoxLayout                    *m_layout          = nullptr;

  // MapLayer:
  QGridLayout                    *m_mapLayerLayout  = nullptr;

  // BaseMapSelection:
  QHBoxLayout                    *m_baseMapSelectLayout = nullptr;
  QList<QToolButton *>            m_baseMapSelectIcons;
  QLabel                         *m_lbBasemap           = nullptr;



  QMap<QString, SliderStruct>     m_sliderMap;

  // Zoom and rotation
  QHBoxLayout                    *m_zoomLayout        = nullptr;  // will contain zoom and rotation elements
  QSlider                        *m_zoomSlider        = nullptr;
  QSlider                        *m_rotationSlider    = nullptr;
  QSlider                        *m_symbolSizeSlider  = nullptr; // 10 ... 200
  QTimer                         *m_symbolSizeTimer   = nullptr;

}; // class LayerControlWidget::Private
//-----------------------------------------------------------------------------


//-----------------------------------------------------------------------------
// class LayerControlWidget
//-----------------------------------------------------------------------------
LayerControlWidget::LayerControlWidget(QWidget *parent,
                                       Map *map,
                                       bool enableLayer,
                                       bool enableBasemap,
                                       const QString &debugInfo)
  : QWidget(parent)
  , d(new Private)
  , m_logger(getLogger("LayerControlWidget"))
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " START"
                      << " debugInfo='" << debugInfo << "'";

  d->m_debugInfo      = debugInfo;
  d->m_map            = map;
  d->m_layerEnabled   = enableLayer;
  d->m_basemapEnabled = enableBasemap;


  d->m_layout     = new QVBoxLayout();
  this->setLayout(d->m_layout);
  setAcceptDrops(true);

  // use QueuedConnect to let dropEvent (and destroying of QDrag object) finish
  // BEFORE the panel is updated (and DragableCheckBox - parent of QDrag object - are deleted.)
  connect(d->m_map, &Map::layerOrderChanged,      this, &LayerControlWidget::updatePanelLayer, Qt::ConnectionType::QueuedConnection);
  connect(d->m_map, &Map::layerParameterChanged,  this, &LayerControlWidget::onLayerParamterChanged);
  connect(d->m_map, &Map::mapReady,               this, &LayerControlWidget::onMapReady, Qt::ConnectionType::QueuedConnection);


  updatePanel();
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

LayerControlWidget::~LayerControlWidget()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  delete d;
}


bool LayerControlWidget::updatePanel()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  updatePanelZoomRotationScales();
  updatePanelLayer();
//  updatePanelBasemap();

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  return true;
}

bool LayerControlWidget::updatePanelZoomRotationScales()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  if (! d->m_zoomRotScaleEnabled)
    return false;

  if (d->m_zoomLayout)
    return true;

  d->m_zoomLayout = new QHBoxLayout();
  d->m_layout->addLayout(d->m_zoomLayout);

  d->m_zoomSlider = generateZoomSlider();
  d->m_zoomLayout->addWidget(d->m_zoomSlider);

  // problems around scale in 3D:
  d->m_zoomSlider->setEnabled(d->m_map->mode() == Mode::Mode_2D);


  QComboBox *cmbScale = new QComboBox();
  d->m_zoomLayout->addWidget(cmbScale);

  cmbScale->addItem(tr("Presets"));
  cmbScale->insertSeparator(1);

  using scaleDataTyp = QPair<QString, int>;
  const auto scaleData = {
    scaleDataTyp(QLatin1String(" 1:25000"), 400000),
    scaleDataTyp(QLatin1String(" 1:50000"), 200000),
    scaleDataTyp(QLatin1String("1:100000"), 100000)
  };

  for (const scaleDataTyp &item : scaleData)
    cmbScale->addItem(item.first, QVariant(item.second));  // stored in Qt::UserRole

  // c++11 -> lambda :-)
  connect(cmbScale, static_cast<void (QComboBox::*)(int)>(&QComboBox::activated), this, [this, cmbScale](int index)
  {
    if (index <= 1) return;  // 1 Damit 'Presets' + Separator ohne Auswirkung bleibt

    int selectedScale = cmbScale->currentData().toInt();
    DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " cmbScale selectedScale=" << selectedScale;
    d->m_map->setScale(selectedScale);

    cmbScale->setCurrentIndex(0); // Textausgabe auf 'Presets' setzen
  });


  //
  // Rotation:
  //
  if (! d->m_rotationSlider)
  {
    d->m_rotationSlider  = generateRotationSlider();
    d->m_layout->addWidget(d->m_rotationSlider);
  }

  //
  // SymbolSize:
  //
  if (! d->m_symbolSizeSlider)
  {
    d->m_symbolSizeSlider = generateSymbolSizeSlider();
    d->m_layout->addWidget(d->m_symbolSizeSlider);
  }

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  return true;
}

bool LayerControlWidget::updatePanelLayer()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";


  //
  // Layer:
  //

  // reNew the part of mapLayer :
  if (d->m_mapLayerLayout)
  {
    for (int row = 0; row < d->m_mapLayerLayout->rowCount(); ++row)
    {
      for (int col = 0; col < d->m_mapLayerLayout->columnCount(); ++col)
      {
        QLayoutItem *item = d->m_mapLayerLayout->itemAtPosition(row, col);
        if (item)
        {
          QWidget *w = item->widget();
          delete w;
          // w->deleteLater() --> QCoreApplication::postEvent: Unexpected null receiver (ication/ngl_qt_msg_handler.inc:25)
        }
      }
    }
  }
  delete d->m_mapLayerLayout;
  d->m_mapLayerLayout = nullptr;
  d->m_sliderMap.clear();



  if (! d->m_layerEnabled)
    return false;


  d->m_mapLayerLayout = new QGridLayout();
  d->m_layout->addLayout(d->m_mapLayerLayout);

  int row = 0;

  QCheckBox *cbExpand = new QCheckBox(tr("Expand"), this);
  d->m_mapLayerLayout->addWidget(cbExpand, row++, 0);

  cbExpand->setChecked(false);
  connect(cbExpand, &QCheckBox::clicked, this, &LayerControlWidget::expandCollapse);


  //
  // Fill MapLayerLayout :
  //
  if (d->m_map)
  {
    int col = 0;

    const auto header = {
      tr("Layer"),
      tr("Opacity"),
      tr("Brightness"),
      tr("Contrast"),
      tr("Gamma")
    };

    for (const QString &name : header)
      d->m_mapLayerLayout->addWidget(new QLabel(name), row, col++);

    const QStringList sl = d->m_map->layerFactory().layernames();

    DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " layers=" << sl.join(QLatin1Char(';'));

    row += sl.count();

    for (const QString &layername : sl)
    {
      DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " layerName=" << layername;
      int col = 0;

      const LayerParameter &lp   = d->m_map->layerFactory().layerParameter(layername);
      const LayerType &layerType = d->m_map->layerFactory().layerType(layername);

      DragableCheckBox *cbOnOff = new DragableCheckBox();
      if (lp.displayName.isEmpty())
        cbOnOff->setText(layername);
      else
        cbOnOff->setText(lp.displayName);
      cbOnOff->setProperty(LayernameProperty, layername);
      d->m_sliderMap[layername].cbOnOff = cbOnOff;
      cbOnOff->setObjectName(QLatin1String("DragableCheckBox_") + layername);
      cbOnOff->setChecked(lp.visible);


      const QString &tooltip = generateToolTip(layername, lp);
      if (!tooltip.isEmpty())
        cbOnOff->setToolTip(tooltip);

      connect(cbOnOff, &QCheckBox::stateChanged, this, &LayerControlWidget::layerOnOff);
      d->m_mapLayerLayout->addWidget(cbOnOff, row, col++);


      mySlider *sl_opac = new mySlider(layername, 0, 100);
      d->m_sliderMap[layername].sl_opacity = sl_opac;
      sl_opac->setObjectName(QLatin1String("sl_opac"));
      sl_opac->setValue(lp.opacity);
      connect(sl_opac, &mySlider::valueChanged, this, &LayerControlWidget::opacity);
      d->m_mapLayerLayout->addWidget(sl_opac, row, col++);

      if (layerType == SituationMap::LayerType::Basemap)
      {
        mySlider *sl_brightness = new mySlider(layername, -100, 100);
        d->m_sliderMap[layername].sl_brightness = sl_brightness;
        sl_brightness->setObjectName(QLatin1String("sl_brightness"));
        sl_brightness->setValue(lp.brightness);
        connect(sl_brightness, &mySlider::valueChanged, this, &LayerControlWidget::brightness);
        d->m_mapLayerLayout->addWidget(sl_brightness, row, col++);

        mySlider *sl_contrast = new mySlider(layername, -100, 100);
        d->m_sliderMap[layername].sl_contrast = sl_contrast;
        sl_contrast->setObjectName(QLatin1String("sl_contrast"));
        sl_contrast->setValue(lp.contrast);
        connect(sl_contrast, &mySlider::valueChanged, this, &LayerControlWidget::contrast);
        d->m_mapLayerLayout->addWidget(sl_contrast, row, col++);

        mySlider *sl_gamma = new mySlider(layername, -100, 100);
        d->m_sliderMap[layername].sl_gamma = sl_gamma;
        sl_gamma->setObjectName(QLatin1String("sl_gamma"));
        sl_gamma->setValue(lp.gamma);
        connect(sl_gamma, &mySlider::valueChanged, this, &LayerControlWidget::gamma);
        d->m_mapLayerLayout->addWidget(sl_gamma, row, col++);
      }

      --row;
    }

#ifdef ONLY_FOR_TESTS
    QPushButton *pbAddBasemapLayer = new QPushButton(QLatin1String("add BasemapLayer"));
    d->m_mapLayerLayout->addWidget(pbAddBasemapLayer);

    QLatin1String newBasemapName("basemapAddedByBtn");
    QLatin1String newBasemapUrl("http://192.168.133.88:6080/arcgis/rest/services/BremenGeoTiff/MapServer");
    // QLatin1String newBasemap("http://192.168.133.88:6080/arcgis/rest/services/BremenGeoTiffUTM/MapServer");
    pbAddBasemapLayer->setToolTip(newBasemapUrl);

    connect(pbAddBasemapLayer, &QPushButton::clicked, this, [this]()
    {
      bool success = d->m_map->layerFactory().addBasemap(newBasemapName, newBasemapUrl);
      INFO_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " adding basemapLayer, success=" << success;
    });

    QPushButton *pbRemoveBasemapLayer = new QPushButton(QLatin1String("remove BasemapLayer"));
    d->m_mapLayerLayout->addWidget(pbRemoveBasemapLayer);

    pbRemoveBasemapLayer->setToolTip(newBasemapUrl);

    connect(pbRemoveBasemapLayer, &QPushButton::clicked, this, [this]()
    {
      bool success = d->m_map->layerFactory().removeBasemap(newBasemapName);
      INFO_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " removing basemapLayer, success=" << success;
    });
#endif

    expandCollapse(cbExpand->isChecked());


  }
  else
    ERROR_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " no map !!!";

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  return true;
}

bool LayerControlWidget::updatePanelBasemap()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  // clear old widgets:
  d->m_baseMapSelectIcons.clear();
  if (d->m_baseMapSelectLayout)
  {
    QLayoutItem *item;
    while ((item = d->m_baseMapSelectLayout->takeAt(0)))
    {
      QWidget *w = item->widget();
      delete w;
      delete item;
    }
  }
  delete d->m_baseMapSelectLayout;
  d->m_baseMapSelectLayout = nullptr;


  if (! d->m_basemapEnabled)
    return false;



  // create from scratch:
  if (! d->m_baseMapSelectLayout)
  {
    QVBoxLayout *vBox = new QVBoxLayout();

    if (! d->m_lbBasemap)
      d->m_lbBasemap = new QLabel(tr("Basemaps:"));

    vBox->addWidget(d->m_lbBasemap);

    d->m_baseMapSelectLayout = new QHBoxLayout();
    vBox->addLayout(d->m_baseMapSelectLayout);

    d->m_layout->addLayout(vBox);

    LayerFactory &layFac = d->m_map->layerFactory();
    const QStringList &basemapLayernames = layFac.layernames(LayerType::Basemap);

    for (const QString &layername : basemapLayernames)
    {
      //      baseMapProxy->setStyleSheet(QLatin1String("QPushButton {background-color: transparent; border: 1px solid transparent;}"));
      const LayerParameter &lp = d->m_map->layerFactory().layerParameter(layername);

      QToolButton *baseMapProxy = new QToolButton(this);

      baseMapProxy->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);  // eTextUnderIcon?
      baseMapProxy->setText(lp.displayName);


      baseMapProxy->setObjectName(d->m_debugInfo + layername);
      baseMapProxy->setProperty(LayernameProperty, layername);

      baseMapProxy->setIcon(QIcon(QPixmap::fromImage(lp.previewImage)));
      baseMapProxy->setIconSize(QSize(40,40));

      baseMapProxy->setCheckable(true);
      baseMapProxy->setChecked(true);                           // Assume that all are enable by default

      const QString &tooltip = generateToolTip(layername, lp);
      if (!tooltip.isEmpty())
        baseMapProxy->setToolTip(tooltip);

      d->m_baseMapSelectLayout->addWidget(baseMapProxy);
      d->m_baseMapSelectIcons.append(baseMapProxy);
      connect(baseMapProxy, &QToolButton::clicked, this, &LayerControlWidget::onBaseMapSelection);
    } // Q_FOREACH

    d->m_baseMapSelectLayout->addStretch(42);
  }

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  return true;
}

void LayerControlWidget::expandCollapse(bool expanded)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  for (int row = 1; row < d->m_mapLayerLayout->rowCount(); ++row)
  {
    for (int col = 2; col < d->m_mapLayerLayout->columnCount(); ++col)
    {
      QLayoutItem *item = d->m_mapLayerLayout->itemAtPosition(row, col);
      if (item)
      {
        QWidget *w = item->widget();
        if (w)
          w->setVisible(expanded);
      }
    }
  }

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

QString LayerControlWidget::generateToolTip(const QString &layername,
                                            const LayerParameter &lp)
{
  QString tooltip;

  tooltip.append(QStringLiteral("<html>"));

  tooltip.append(QStringLiteral("<p><b>displayName=%1</b></p>").arg(lp.displayName));

  if (! lp.previewImage.isNull())
  {
    // without a temporary file:
    QByteArray data;
    QBuffer buffer(&data);
    lp.previewImage.save(&buffer, "PNG", 100);
    QString html(QLatin1String("<br />"));
    html.append(QStringLiteral("<img src='data:image/png;base64,%1'>").arg(QString::fromLatin1(data.toBase64())));
    tooltip.append(html);
  }

  if (lp.basemapType != BasemapType::Undefined)
    tooltip.append(QStringLiteral("<p>BasemapType=%1</p>").arg(toDisplayString(lp.basemapType)));


  tooltip.append(QStringLiteral("<p>layername=%1</p>").arg(layername));
  tooltip.append(QStringLiteral("<p>description=%1</p>").arg(lp.description));
  tooltip.append(QStringLiteral("<p>svcDescription=%1</p>").arg(lp.svcDescription));
  tooltip.append(QStringLiteral("<p>url=%1</p>").arg(lp.url.toString()));
  tooltip.append(QStringLiteral("<p>minScale=%1 - maxScale=%2</p>").arg((int)lp.minScale).arg((int)lp.maxScale));
  tooltip.append(QStringLiteral("</html>"));

  return tooltip;
}

QSlider *LayerControlWidget::generateZoomSlider()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";
  QSlider *slider = new QSlider(Qt::Orientation::Horizontal);

  // 1. Init
  if (d->m_map->isReady())
  {
    // This branch is taken in case of FunctionDialog:
    onZoomSliderInit(slider);
  }

  // 2. extentChanged
  // Attention: use identical signal at any other zoom/scale-Slider!!!
  connect(d->m_map, &Map::extentChangedDelayed, this, &LayerControlWidget::onMapExtentChanged);

  // 3. valueChanged
  connect(slider, &QSlider::valueChanged, this, &LayerControlWidget::onZoomSliderValueChanged);

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  return slider;
}



QSlider *LayerControlWidget::generateRotationSlider()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";
  QSlider *slider = new QSlider();
  slider->setToolTip(tr("Rotation"));
  slider->setOrientation(Qt::Orientation::Horizontal);
  slider->setTickPosition(QSlider::TicksBelow);
  slider->setTickInterval(10);
  slider->setSingleStep(10);
  slider->setMinimum(0);
  slider->setMaximum(359);
  slider->setValue(0);

  if (d->m_map->isReady())
    slider->setValue(d->m_map->rotation());

  connect(slider,   &QSlider::valueChanged, this, &LayerControlWidget::onRotationSliderValueChanged);
  connect(d->m_map, &Map::rotationChanged,  this, &LayerControlWidget::onRotationOfMapChanged);

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  return slider;
}

QSlider *LayerControlWidget::generateSymbolSizeSlider()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";
  QSlider *slider = new QSlider();
  slider->setToolTip(tr("Symbol Size"));
  slider->setOrientation(Qt::Orientation::Horizontal);
  slider->setTickPosition(QSlider::TicksBelow);
  slider->setTickInterval(10);              // 10%
  slider->setMinimum(SituationMap::symbolScaleMinimum * 100); // 10%
  slider->setMaximum(SituationMap::symbolScaleMaximum * 100); // 200%
  slider->setSingleStep(10);                // 10%

  if (d->m_map->isReady())
    slider->setValue(d->m_map->symbolScale() * 100);

  connect(slider,   &QSlider::valueChanged,   this, &LayerControlWidget::onSymbolSizeSliderValueChanged);
  connect(d->m_map, &Map::symbolScaleChanged, this, &LayerControlWidget::onSymbolSizeOfMapChanged);

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  return slider;
}



void LayerControlWidget::onZoomSliderInit(QSlider *slider)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  if (! slider)
    return;

  const QSignalBlocker blocker(slider);


  slider->setToolTip(tr("Zoom"));
  slider->setMinimum(sqrt(d->m_map->maxScale()));
  slider->setMaximum(sqrt(d->m_map->minScale()));
  onMapExtentChanged();

  if (slider->minimum() == slider->maximum())
  {
    WARNING_LOG(m_logger) << LOGFUNCTION << " min/max value are identical, debugInfo='" << d->m_debugInfo << "'"
                          << " minimum=" << slider->minimum()
                          << " maximum=" << slider->maximum()
                          << " value=" << slider->value();

    slider->setMinimum(sqrt(500));
    slider->setMaximum(sqrt(100000));

    WARNING_LOG(m_logger) << LOGFUNCTION << " min/max value are identical, debugInfo='" << d->m_debugInfo << "'"
                          << " minimum=" << slider->minimum()
                          << " maximum=" << slider->maximum()
                          << " value=" << slider->value();
  }

  DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'"
                      << " minimum=" << slider->minimum()
                      << " maximum=" << slider->maximum()
                      << " value=" << slider->value();

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

void LayerControlWidget::onZoomSliderValueChanged()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  QSlider *slider = qobject_cast<QSlider *>(sender());
  if (! slider)
    return;

  if (d->m_map->isReady())
    d->m_map->setScale(slider->value() * slider->value());

  DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'"
                      << " new target value: " << slider->value() * slider->value();

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

void LayerControlWidget::onRotationSliderValueChanged()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START"
                      << " rawValue = " << d->m_rotationSlider->value();

  if (d->m_map->isReady()
//      && slider->isSliderDown()
     )
  {
//    ERROR_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " push new value "
//                        << " slider= " << slider
//                        << slider->value();
    d->m_map->setRotation(d->m_rotationSlider->value());
  }

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

void LayerControlWidget::onRotationOfMapChanged(double rotation)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START" << " rotation " << rotation;

  if (! d->m_rotationSlider)
    return;

  if (d->m_map->isReady() && !d->m_rotationSlider->isSliderDown())
  {
    const QSignalBlocker blocker(d->m_rotationSlider);
    d->m_rotationSlider->setValue(rotation);
  }

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}





void LayerControlWidget::onSymbolSizeSliderValueChanged()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START"
                      << " rawValue = " << d->m_symbolSizeSlider->value();

  if (!d->m_symbolSizeTimer)
  {
    d->m_symbolSizeTimer = new QTimer(this);
    d->m_symbolSizeTimer->setSingleShot(true);
    d->m_symbolSizeTimer->setInterval(500);   // msec
    connect(d->m_symbolSizeTimer, &QTimer::timeout, this, &LayerControlWidget::onSymbolSizeSliderValueChangedTimeout);
  }

  d->m_symbolSizeTimer->start();  // start -> restart

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

void LayerControlWidget::onSymbolSizeSliderValueChangedTimeout()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START"
                      << " rawValue = " << d->m_symbolSizeSlider->value();

  double symSize = d->m_symbolSizeSlider->value() / 100.0;
  d->m_map->setSymbolScale(symSize);

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

void LayerControlWidget::onSymbolSizeOfMapChanged(double symbolSize)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START" << " symbolSize " << symbolSize;

  if (! d->m_symbolSizeSlider)
    return;

  int symSizeInt = symbolSize * 100;
  const QSignalBlocker blocker(d->m_symbolSizeSlider);
  d->m_symbolSizeSlider->setValue(symSizeInt);

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}



void LayerControlWidget::onBaseMapSelection()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  QObject *pb = qobject_cast<QObject *>(sender());
  if (! pb)
  {
    DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " cast failed";
    return;
  }

  // check/uncheck all:
  for (auto widget : qAsConst(d->m_baseMapSelectIcons))
    widget->setChecked(widget == pb);


  LayerFactory &layFac = d->m_map->layerFactory();
  const QStringList &basemapLayernames = layFac.layernames(LayerType::Basemap);

  const QString &curName = pb->property(LayernameProperty).toString();

  DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " sender=" << curName;
  for (const QString &name : basemapLayernames)
  {
    bool isCur = name.compare(curName) == 0;
    LayerParameter lp = layFac.layerParameter(name);
    if (isCur)
      lp.resetView();
    lp.visible = isCur;
    layFac.setLayerParameter(name, lp);
  }

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

void LayerControlWidget::onMapReady()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";
  onZoomSliderInit(d->m_zoomSlider);
  onRotationOfMapChanged(d->m_map->rotation());
  onSymbolSizeOfMapChanged(d->m_map->symbolScale());
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

void LayerControlWidget::onMapExtentChanged()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  if (d->m_zoomSlider && d->m_zoomSlider->isEnabled() && d->m_map->isReady() && (!d->m_zoomSlider->isSliderDown()))
  {
    const QSignalBlocker blocker(d->m_zoomSlider);

    float newVal = sqrt(d->m_map->scale());
    d->m_zoomSlider->setValue(newVal);
    DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'"
                        << " d->m_map->scale(): " << d->m_map->scale()
                        << "; newVal: " << newVal
                        << "; value set to: " << d->m_zoomSlider->value();
  }

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}




void LayerControlWidget::layerOnOff()
{
  QCheckBox *cb = qobject_cast<QCheckBox *>(sender());
  if (!cb)
    return;

  QString layername = cb->property(LayernameProperty).toString();

  // get LayerParameter, update data and set:
  LayerParameter lp = d->m_map->layerFactory().layerParameter(layername);
  lp.visible = cb->isChecked();
  d->m_map->layerFactory().setLayerParameter(layername, lp);
}

void LayerControlWidget::opacity(int)
{
  mySlider *sl = qobject_cast<mySlider *>(sender());
  if (!sl)
    return;

  QString layername = sl->m_layername;

  LayerParameter lp = d->m_map->layerFactory().layerParameter(layername);
  lp.opacity = sl->value();
  d->m_map->layerFactory().setLayerParameter(layername, lp);

}

void LayerControlWidget::brightness(int)
{
  mySlider *sl = qobject_cast<mySlider *>(sender());
  if (!sl)
    return;

  QString layername = sl->m_layername;

  LayerParameter lp = d->m_map->layerFactory().layerParameter(layername);
  lp.brightness = sl->value();
  d->m_map->layerFactory().setLayerParameter(layername, lp);
}

void LayerControlWidget::contrast(int)
{
  mySlider *sl = qobject_cast<mySlider *>(sender());
  if (!sl)
    return;

  QString layername = sl->m_layername;

  LayerParameter lp = d->m_map->layerFactory().layerParameter(layername);
  lp.contrast = sl->value();
  d->m_map->layerFactory().setLayerParameter(layername, lp);
}

void LayerControlWidget::gamma(int)
{
  mySlider *sl = qobject_cast<mySlider *>(sender());
  if (!sl)
    return;

  QString layername = sl->m_layername;

  LayerParameter lp = d->m_map->layerFactory().layerParameter(layername);
  lp.gamma = sl->value();
  d->m_map->layerFactory().setLayerParameter(layername, lp);
}

void LayerControlWidget::onLayerParamterChanged(const QString &layername, const LayerParameter &newLayerParameter)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START"
                      << " layername= '" << layername << "'";

//  INFO_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'"
//                     << " layername=" << layername
//                     << " lp=" << newLayerParameter;

  if (! d->m_sliderMap.contains(layername))
  {
    DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'"
                        << " layername='" << layername << "' is new -> updatePanel";
    updatePanelLayer();
    return;
  }

  // refresh GUI:
  if (d->m_sliderMap.contains(layername))
  {
    SliderStruct &data = d->m_sliderMap[layername];

    if (data.cbOnOff)       data.cbOnOff      ->setChecked(newLayerParameter.visible);
    if (data.sl_opacity)    data.sl_opacity   ->setValue(newLayerParameter.opacity);
    if (data.sl_brightness) data.sl_brightness->setValue(newLayerParameter.brightness);
    if (data.sl_contrast)   data.sl_contrast  ->setValue(newLayerParameter.contrast);
    if (data.sl_gamma)      data.sl_gamma     ->setValue(newLayerParameter.gamma);
  }

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}


QString LayerControlWidget::layernameAt(const QPoint &pos) const
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";
  QWidget *child = childAt(pos);
  if (!child)
  {
    DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " no child";
    return QString();
  }

  DragableCheckBox *cb = dynamic_cast<DragableCheckBox *>(child);
  if (!cb)
  {
    DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " dynacast failed";
    return QString();
  }

  const QString &childLayername = cb->property(LayernameProperty).toString();
  DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " childLayername=" << childLayername;

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  return childLayername;
}

QStringList LayerControlWidget::newLayerOrder(const QString &draggedLayername, const QString &childLayername)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  // get current order:
  QStringList sl = d->m_map->layerFactory().layernames();

  if (draggedLayername == childLayername)
    return sl;

  // remove
  sl.removeOne(draggedLayername);

  // find new position:
  int idx = sl.indexOf(childLayername);

  // insert AFTER;
  sl.insert(++idx, draggedLayername);

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
  return sl;
}






void LayerControlWidget::dragMoveEvent(QDragMoveEvent *event)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  if (event->mimeData()->hasFormat(MIMETYPE))
  {
    if (event->source() == this)
    {
      event->setDropAction(Qt::MoveAction);
      event->accept();
    }
    else
    {

      QByteArray itemData = event->mimeData()->data(MIMETYPE);
      QDataStream dataStream(&itemData, QIODevice::ReadOnly);

      QString draggedLayername;
      dataStream >> draggedLayername;
      DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " draggedLayername=" << draggedLayername;

      const QString &childLayername = layernameAt(event->pos());
      DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " childLayername=" << childLayername;

      if (childLayername.isEmpty() ||
          (draggedLayername == childLayername))
        event->ignore();
      else

      {
        const QStringList &newOrder = newLayerOrder(draggedLayername, childLayername);

        bool ok = d->m_map->layerFactory().checkLayerOrder(newOrder);
        DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " layerOrder ok: " << ok;

        if (ok)
          event->acceptProposedAction();
        else
          event->ignore();
      }

    }
  }
  else
    event->ignore();

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}



void LayerControlWidget::dragEnterEvent(QDragEnterEvent *event)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  if (event->mimeData()->hasFormat(MIMETYPE))
  {

    event->acceptProposedAction();

//    if (event->source() != this) {
////      event->setDropAction(Qt::MoveAction);
//      event->accept();
//    } else {
//      event->acceptProposedAction();
//    }
  }
  else
    event->ignore();

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}

void LayerControlWidget::dropEvent(QDropEvent *event)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " START";

  if (event->mimeData()->hasFormat(MIMETYPE))
  {
    QByteArray itemData = event->mimeData()->data(MIMETYPE);
    QDataStream dataStream(&itemData, QIODevice::ReadOnly);

    QString draggedLayername;
    dataStream >> draggedLayername;
    DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " draggedLayername=" << draggedLayername;


    if (event->source() == this)
    {
      event->setDropAction(Qt::MoveAction);
      event->accept();
    }
    else
    {
      event->acceptProposedAction();

      const QString &childLayername = layernameAt(event->pos());
      DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " childLayername=" << childLayername;

      if (draggedLayername == childLayername)
        return;

      const QStringList &newOrder = newLayerOrder(draggedLayername, childLayername);

      bool ok = d->m_map->layerFactory().orderLayerTo(newOrder);
      DEBUG_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " layerOrder ok: " << ok;
    }
  }
  else
    event->ignore();

  TRACE_LOG(m_logger) << LOGFUNCTION << " debugInfo='" << d->m_debugInfo << "'" << " END";
}



} // namespace SituationMap

#include "layer_control_widget.moc"