C++ (Cpp) QgsMeshDatasetIndex示例

示例#1

文件： qgsmeshrendereractivedatasetwidget.cpp 项目： borysiasty/QGIS

void QgsMeshRendererActiveDatasetWidget::syncToLayer()
{
  setEnabled( mMeshLayer );

  whileBlocking( mDatasetGroupTreeView )->syncToLayer();

  if ( mMeshLayer )
  {
    const QgsMeshRendererSettings rendererSettings = mMeshLayer->rendererSettings();
    mActiveDatasetGroup = mDatasetGroupTreeView->activeGroup();
    mActiveScalarDataset = rendererSettings.activeScalarDataset();
    mActiveVectorDataset = rendererSettings.activeVectorDataset();
  }
  else
  {
    mActiveDatasetGroup = -1;
    mActiveScalarDataset = QgsMeshDatasetIndex();
    mActiveVectorDataset = QgsMeshDatasetIndex();
  }

  int val = 0;
  if ( mActiveScalarDataset.isValid() )
    val = mActiveScalarDataset.dataset();
  mDatasetSlider->setValue( val );

  setSliderRange();
  onActiveDatasetChanged( val );
}

示例#2

文件： qgsmeshrendereractivedatasetwidget.cpp 项目： borysiasty/QGIS

void QgsMeshRendererActiveDatasetWidget::onActiveDatasetChanged( int value )
{
  int groupIndex = mDatasetGroupTreeView->activeGroup();

  mActiveScalarDataset = QgsMeshDatasetIndex();
  mActiveVectorDataset = QgsMeshDatasetIndex();
  QgsMeshDatasetIndex datasetIndex( groupIndex, value );

  if ( mMeshLayer &&
       mMeshLayer->dataProvider() &&
       datasetIndex.isValid() &&
       mMeshLayer->dataProvider()->datasetCount( groupIndex ) > value )
  {
    const QgsMeshDatasetGroupMetadata meta = mMeshLayer->dataProvider()->datasetGroupMetadata( datasetIndex );
    mActiveScalarDataset = datasetIndex;
    if ( meta.isVector() )
      mActiveVectorDataset = datasetIndex;
  }

  updateMetadata( datasetIndex );

  emit activeScalarDatasetChanged( activeScalarDataset() );
  emit activeVectorDatasetChanged( activeVectorDataset() );

  emit widgetChanged();
}

示例#3

文件： qgsmeshrendereractivedatasetwidget.cpp 项目： borysiasty/QGIS

QgsMeshDatasetIndex QgsMeshRendererActiveDatasetWidget::datasetIndex() const
{
  int value = mDatasetSlider->value();
  int groupIndex = mDatasetGroupTreeView->activeGroup();

  if ( mMeshLayer &&
       mMeshLayer->dataProvider() &&
       groupIndex != -1 &&
       mMeshLayer->dataProvider()->datasetCount( groupIndex ) > value
     )
    return QgsMeshDatasetIndex( groupIndex, value );
  else
    return QgsMeshDatasetIndex();
}

示例#4

文件： qgsmeshcalculatordialog.cpp 项目： dwsilk/QGIS

void QgsMeshCalculatorDialog::setTimesByDatasetGroupName( const QString group )
{
  QgsMeshLayer *layer = meshLayer();
  if ( !layer || !layer->dataProvider() )
    return;
  const QgsMeshDataProvider *dp = layer->dataProvider();

  // find group index from group name
  int groupIndex = -1;
  for ( int i = 0; i < dp->datasetGroupCount(); ++i )
  {
    const QgsMeshDatasetGroupMetadata meta = dp->datasetGroupMetadata( i );
    if ( meta.name() == group )
    {
      groupIndex = i;
      break;
    }
  }

  if ( groupIndex < 0 )
    return; //not found

  int datasetCount = dp->datasetCount( groupIndex );
  if ( datasetCount < 1 )
    return; // group without datasets


  // find maximum and minimum time in this group
  double minTime = dp->datasetMetadata( QgsMeshDatasetIndex( groupIndex, 0 ) ).time();
  int idx = mStartTimeComboBox->findData( minTime );
  if ( idx >= 0 )
    mStartTimeComboBox->setCurrentIndex( idx );

  double maxTime = dp->datasetMetadata( QgsMeshDatasetIndex( groupIndex, datasetCount - 1 ) ).time();
  idx = mEndTimeComboBox->findData( maxTime );
  if ( idx >= 0 )
    mEndTimeComboBox->setCurrentIndex( idx );
}

示例#5

文件： qgsmeshcalculatordialog.cpp 项目： dwsilk/QGIS

void QgsMeshCalculatorDialog::repopulateTimeCombos()
{
  QgsMeshLayer *layer = meshLayer();
  if ( !layer || !layer->dataProvider() )
    return;
  const QgsMeshDataProvider *dp = layer->dataProvider();

  // extract all times from all datasets
  QMap<QString, double> times;

  for ( int groupIndex = 0; groupIndex < dp->datasetGroupCount(); ++groupIndex )
  {
    for ( int datasetIndex = 0; datasetIndex < dp->datasetCount( groupIndex ); ++datasetIndex )
    {
      const QgsMeshDatasetMetadata meta = dp->datasetMetadata( QgsMeshDatasetIndex( groupIndex, datasetIndex ) );
      const double time = meta.time();

      const QString timestr =  QgsMeshRendererActiveDatasetWidget::formatTime( time ); // the format is "HH:mm:ss"

      times[timestr] = time;
    }
  }

  // sort by text
  auto keys = times.keys();
  keys.sort();

  mStartTimeComboBox->blockSignals( true );
  mEndTimeComboBox->blockSignals( true );
  mStartTimeComboBox->clear();
  mEndTimeComboBox->clear();

  // populate combos
  for ( const QString &key : keys )
  {
    mStartTimeComboBox->addItem( key, times[key] );
    mEndTimeComboBox->addItem( key, times[key] );
  }

  mStartTimeComboBox->blockSignals( false );
  mEndTimeComboBox->blockSignals( false );


  if ( !times.empty() )
  {
    mStartTimeComboBox->setCurrentIndex( 0 );
    mEndTimeComboBox->setCurrentIndex( times.size() - 1 );
  }
}