C++ const_iterator::key方法代码示例

void QgsAttributeTableModel::loadAttributes()
{
  if ( !mLayer )
  {
    return;
  }

  bool ins = false, rm = false;

  QgsAttributeList attributes;
  for ( QgsFieldMap::const_iterator it = mLayer->pendingFields().constBegin(); it != mLayer->pendingFields().end(); it++ )
  {
    switch ( mLayer->editType( it.key() ) )
    {
      case QgsVectorLayer::Hidden:
        continue;

      case QgsVectorLayer::ValueMap:
        mValueMaps.insert( it.key(), &mLayer->valueMap( it.key() ) );
        break;

      default:
        break;
    }

    attributes << it.key();
  }

  if ( mFieldCount < attributes.size() )
  {
    ins = true;
    beginInsertColumns( QModelIndex(), mFieldCount, attributes.size() - 1 );
  }
  else if ( attributes.size() < mFieldCount )
  {
    rm = true;
    beginRemoveColumns( QModelIndex(), attributes.size(), mFieldCount - 1 );
  }

  mFieldCount = attributes.size();
  mAttributes = attributes;
  mValueMaps.clear();

  if ( ins )
  {
    endInsertColumns();
  }
  else if ( rm )
  {
    endRemoveColumns();
  }
}

int OptVectorLayer::addFeatureWithDefaultValue( OptFeature& f )
{
//{zhangliye2715:api}
  if ( !isEditable() )
  {
    startEditing();
  }

  // add the fields to the QgsFeature
  QgsVectorDataProvider* provider = dataProvider();
  const QgsFieldMap fields = provider->fields();

  for ( QgsFieldMap::const_iterator it = fields.begin(); it != fields.end(); ++it )
  {
    f.addAttribute( it.key(), provider->defaultValue( it.key() ) );
  }

  int id = -1;
  id = OptVectorLayer::addFeature( f );
  if ( id != -1 )
  {
    //add points to other features to keep topology up-to-date
    int topologicalEditing = QgsProject::instance()->readNumEntry( "Digitizing", "/TopologicalEditing", 0 );

    if( topologicalEditing )
    {
      addTopologicalPoints( f.geometry() );
    }
  }
  else
  {
    return -1;
  }

  //vlayer->setModified(true);
  //commit or rollBack the change
  if ( isModified() )
  {
    commitChanges();
  }
  else
  {
    rollBack();
    return -1;
  }

  //make the layer still editable for the next adding operation
  startEditing();

  return id;
}

void QgsVectorLayerProperties::loadRows()
{
  const QgsFieldMap &fields = layer->pendingFields();

  tblAttributes->clear();

  tblAttributes->setColumnCount( 8 );
  tblAttributes->setRowCount( fields.size() );
  tblAttributes->setHorizontalHeaderItem( 0, new QTableWidgetItem( tr( "id" ) ) );
  tblAttributes->setHorizontalHeaderItem( 1, new QTableWidgetItem( tr( "name" ) ) );
  tblAttributes->setHorizontalHeaderItem( 2, new QTableWidgetItem( tr( "type" ) ) );
  tblAttributes->setHorizontalHeaderItem( 3, new QTableWidgetItem( tr( "length" ) ) );
  tblAttributes->setHorizontalHeaderItem( 4, new QTableWidgetItem( tr( "precision" ) ) );
  tblAttributes->setHorizontalHeaderItem( 5, new QTableWidgetItem( tr( "comment" ) ) );
  tblAttributes->setHorizontalHeaderItem( 6, new QTableWidgetItem( tr( "edit widget" ) ) );
  tblAttributes->setHorizontalHeaderItem( 7, new QTableWidgetItem( tr( "values" ) ) );

  tblAttributes->setSelectionBehavior( QAbstractItemView::SelectRows );
  tblAttributes->setSelectionMode( QAbstractItemView::MultiSelection );

  int row = 0;
  for ( QgsFieldMap::const_iterator it = fields.begin(); it != fields.end(); it++, row++ )
    setRow( row, it.key(), it.value() );

  tblAttributes->resizeColumnsToContents();
}

void QgsComposerAttributeTable::initializeAliasMap()
{
  mFieldAliasMap.clear();
  if ( mVectorLayer )
  {
    QgsFieldMap fieldMap = mVectorLayer->pendingFields();
    QgsFieldMap::const_iterator it = fieldMap.constBegin();
    for ( ; it != fieldMap.constEnd(); ++it )
    {
      QString currentAlias = mVectorLayer->attributeAlias( it.key() );
      if ( !currentAlias.isEmpty() )
      {
        mFieldAliasMap.insert( it.key(), currentAlias );
      }
    }
  }
}

QMap<int, QString> QgsComposerAttributeTable::getHeaderLabels() const
{
  QMap<int, QString> header;
  if ( mVectorLayer )
  {
    QgsFieldMap vectorFields = mVectorLayer->pendingFields();
    QgsFieldMap::const_iterator fieldIt = vectorFields.constBegin();
    for ( ; fieldIt != vectorFields.constEnd(); ++fieldIt )
    {
      if ( mDisplayAttributes.size() > 0 && !mDisplayAttributes.contains( fieldIt.key() ) )
      {
        continue;
      }
      header.insert( fieldIt.key(), attributeDisplayName( fieldIt.key(), fieldIt.value().name() ) );
    }
  }
  return header;
}

int QgsLabelDialog::fieldIndexFromName( QString name )
{
  const QgsFieldMap& fields = mLabel->fields();
  for ( QgsFieldMap::const_iterator it = fields.begin(); it != fields.end(); ++it )
  {
    if ( it->name() == name )
      return it.key();
  }
  return -1;
}

void QgsLabelingGui::populateDataDefinedCombos( QgsPalLayerSettings& s )
{
  QList<QComboBox*> comboList;
  comboList << mSizeAttributeComboBox;
  comboList << mColorAttributeComboBox;
  comboList << mBoldAttributeComboBox;
  comboList << mItalicAttributeComboBox;
  comboList << mUnderlineAttributeComboBox;
  comboList << mStrikeoutAttributeComboBox;
  comboList << mFontFamilyAttributeComboBox;
  comboList << mBufferSizeAttributeComboBox;
  comboList << mBufferColorAttributeComboBox;
  comboList << mXCoordinateComboBox;
  comboList << mYCoordinateComboBox;
  comboList << mHorizontalAlignmentComboBox;
  comboList << mVerticalAlignmentComboBox;
  comboList << mLabelDistanceComboBox;
  comboList << mRotationComboBox;

  QList<QComboBox*>::iterator comboIt = comboList.begin();
  for ( ; comboIt != comboList.end(); ++comboIt )
  {
    ( *comboIt )->addItem( "", QVariant() );
  }

  const QgsFieldMap& fields = mLayer->dataProvider()->fields();
  for ( QgsFieldMap::const_iterator it = fields.constBegin(); it != fields.constEnd(); it++ )
  {
    for ( comboIt = comboList.begin(); comboIt != comboList.end(); ++comboIt )
    {
      ( *comboIt )->addItem( it.value().name(), it.key() );
    }

  }

  //set current combo boxes to already existing indices
  setCurrentComboValue( mSizeAttributeComboBox, s, QgsPalLayerSettings::Size );
  setCurrentComboValue( mColorAttributeComboBox, s, QgsPalLayerSettings::Color );
  setCurrentComboValue( mBoldAttributeComboBox, s, QgsPalLayerSettings::Bold );
  setCurrentComboValue( mItalicAttributeComboBox, s, QgsPalLayerSettings::Italic );
  setCurrentComboValue( mUnderlineAttributeComboBox, s, QgsPalLayerSettings::Underline );
  setCurrentComboValue( mStrikeoutAttributeComboBox, s, QgsPalLayerSettings::Strikeout );
  setCurrentComboValue( mFontFamilyAttributeComboBox, s, QgsPalLayerSettings::Family );
  setCurrentComboValue( mBufferSizeAttributeComboBox, s , QgsPalLayerSettings::BufferSize );
  setCurrentComboValue( mBufferColorAttributeComboBox, s, QgsPalLayerSettings::BufferColor );
  setCurrentComboValue( mXCoordinateComboBox, s, QgsPalLayerSettings::PositionX );
  setCurrentComboValue( mYCoordinateComboBox, s, QgsPalLayerSettings::PositionY );
  setCurrentComboValue( mHorizontalAlignmentComboBox, s, QgsPalLayerSettings::Hali );
  setCurrentComboValue( mVerticalAlignmentComboBox, s, QgsPalLayerSettings::Vali );
  setCurrentComboValue( mLabelDistanceComboBox, s, QgsPalLayerSettings::LabelDistance );
  setCurrentComboValue( mRotationComboBox, s, QgsPalLayerSettings::Rotation );
}

void SaQueryBuilder::populateFields()
{
  for ( QgsFieldMap::const_iterator it = mLayer->pendingFields().begin(); it != mLayer->pendingFields().end(); it++ )
  {
    QStandardItem *myItem = new QStandardItem( it->name() );
    myItem->setData( it.key() );
    myItem->setEditable( false );
    mModelFields->insertRow( mModelFields->rowCount(), myItem );
  }

  // All fields get ... setup
  setupLstFieldsModel();
}

int QgsVectorDataProvider::fieldNameIndex( const QString& fieldName ) const
{
  const QgsFieldMap &theFields = fields();

  for ( QgsFieldMap::const_iterator it = theFields.constBegin(); it != theFields.constEnd(); ++it )
  {
    if ( QString::compare( it->name(), fieldName, Qt::CaseInsensitive ) == 0 )
    {
      return it.key();
    }
  }
  return -1;
}

QgsDelAttrDialog::QgsDelAttrDialog( const QgsVectorLayer* vl ): QDialog()
{
    setupUi( this );
    if ( vl )
    {
        listBox2->clear();
        const QgsFieldMap layerAttributes = vl->pendingFields();
        QgsFieldMap::const_iterator attIt = layerAttributes.constBegin();
        for ( ; attIt != layerAttributes.constEnd(); ++attIt )
        {
            QListWidgetItem* item = new QListWidgetItem( attIt.value().name(), listBox2 );
            item->setData( Qt::UserRole, attIt.key() );
        }
    }
}

void QgsFieldCalculator::populateFields()
{
  if ( !mVectorLayer )
    return;

  const QgsFieldMap fieldMap = mVectorLayer->pendingFields();
  QgsFieldMap::const_iterator fieldIt = fieldMap.constBegin();
  for ( ; fieldIt != fieldMap.constEnd(); ++fieldIt )
  {

    QString fieldName = fieldIt.value().name();

    //insert into field list and field combo box
    mFieldMap.insert( fieldName, fieldIt.key() );
    mExistingFieldComboBox->addItem( fieldName );
  }
}

void QgsSearchQueryBuilder::populateFields()
{
  if ( !mLayer )
    return;

  QgsDebugMsg( "entering." );
  QRegExp reQuote( "[A-Za-z_][A-Za-z0-9_]*" );
  const QgsFieldMap& fields = mLayer->pendingFields();
  for ( QgsFieldMap::const_iterator it = fields.begin(); it != fields.end(); ++it )
  {
    QString fieldName = it->name();
    mFieldMap[fieldName] = it.key();
    if ( !reQuote.exactMatch( fieldName ) ) // quote if necessary
      fieldName = QgsExpression::quotedColumnRef( fieldName );
    QStandardItem *myItem = new QStandardItem( fieldName );
    myItem->setEditable( false );
    mModelFields->insertRow( mModelFields->rowCount(), myItem );
  }
}

int QgsSymbol::readFieldName( QDomNode &synode, QString name, const QgsVectorLayer &vl )
{
  QDomNode node = synode.namedItem( name + "name" );

  if ( !node.isNull() )
  {
    const QgsFieldMap &fields = vl.pendingFields();
    QString name = node.toElement().text();

    for ( QgsFieldMap::const_iterator it = fields.begin(); it != fields.end(); it++ )
      if ( it->name() == name )
        return it.key();

    return -1;
  }

  node = synode.namedItem( name );

  return node.isNull() ? -1 : node.toElement().text().toInt();
}

QgsUniqueValueDialog::QgsUniqueValueDialog( QgsVectorLayer* vl ): QDialog(), mVectorLayer( vl ), sydialog( vl, true )
{
  setupUi( this );
  setOrientation( Qt::Vertical );

  //find out the fields of mVectorLayer
  if ( mVectorLayer )
  {
    //we cannot use unique values for not-commited fields because QgsVectorLayer has no 'unique values' method...
    QgsVectorDataProvider* provider = mVectorLayer->dataProvider();
    if ( provider )
    {
      const QgsFieldMap & fields = provider->fields();
      QString str;

      for ( QgsFieldMap::const_iterator it = fields.begin(); it != fields.end(); ++it )
      {
        str = ( *it ).name();
        str = mVectorLayer->attributeDisplayName( it.key() );
        mClassificationComboBox->addItem( str, it.key() );
      }
    }
  }


  mClassListWidget->setSelectionMode( QAbstractItemView::ExtendedSelection );
  mClassListWidget->setEditTriggers( QAbstractItemView::DoubleClicked | QAbstractItemView::EditKeyPressed | QAbstractItemView::AnyKeyPressed );
  mClassListWidget->setSortingEnabled( true );

  if ( mVectorLayer )
  {
    const QgsUniqueValueRenderer* renderer = dynamic_cast<const QgsUniqueValueRenderer *>( mVectorLayer->renderer() );

    if ( renderer )
    {
      mClassListWidget->clear();
      QString field = mVectorLayer->attributeDisplayName( renderer->classificationField() );
      mOldClassificationAttribute = field;
      mClassificationComboBox->setCurrentIndex( mClassificationComboBox->findText( field ) );

      const QList<QgsSymbol*> list = renderer->symbols();
      //fill the items of the renderer into mValues
      for ( QList<QgsSymbol*>::const_iterator iter = list.begin(); iter != list.end(); ++iter )
      {
        QgsSymbol* symbol = *iter;
        QString symbolvalue = symbol->lowerValue();
        QgsSymbol* sym = new QgsSymbol( mVectorLayer->geometryType(), symbol->lowerValue(), symbol->upperValue(), symbol->label() );
        sym->setPen( symbol->pen() );
        sym->setCustomTexture( symbol->customTexture() );
        sym->setBrush( symbol->brush() );
        sym->setNamedPointSymbol( symbol->pointSymbolName() );
        sym->setPointSize( symbol->pointSize() );
        sym->setPointSizeUnits( symbol->pointSizeUnits() );
        sym->setScaleClassificationField( symbol->scaleClassificationField() );
        sym->setRotationClassificationField( symbol->rotationClassificationField() );
        mValues.insert( symbolvalue, sym );

        QListWidgetItem *item = new QListWidgetItem( symbolvalue );
        mClassListWidget->addItem( item );
        updateEntryIcon( symbol, item );
        item->setFlags( Qt::ItemIsSelectable | Qt::ItemIsEditable | Qt::ItemIsEnabled );
        item->setData( Qt::UserRole, symbol->lowerValue() );
        item->setToolTip( symbol->label() );
      }
    }
  }

  mDeletePushButton->setEnabled( false );

  connect( mClassifyButton, SIGNAL( clicked() ), this, SLOT( changeClassificationAttribute() ) );
  connect( mAddButton, SIGNAL( clicked() ), this, SLOT( addClass() ) );
  connect( mDeletePushButton, SIGNAL( clicked() ), this, SLOT( deleteSelectedClasses() ) );
  connect( mRandomizeColors, SIGNAL( clicked() ), this, SLOT( randomizeColors() ) );
  connect( mResetColors, SIGNAL( clicked() ), this, SLOT( resetColors() ) );
  connect( mClassListWidget, SIGNAL( itemSelectionChanged() ), this, SLOT( selectionChanged() ) );
  connect( mCommonPropertyLock, SIGNAL( clicked() ), this, SLOT( selectionChanged() ) );
  connect( mClassListWidget, SIGNAL( itemChanged( QListWidgetItem * ) ), this, SLOT( itemChanged( QListWidgetItem * ) ) );
  connect( &sydialog, SIGNAL( settingsChanged() ), this, SLOT( applySymbologyChanges() ) );
  mSymbolWidgetStack->addWidget( &sydialog );
  mSymbolWidgetStack->setCurrentWidget( &sydialog );
}

void QgsMergeAttributesDialog::createTableWidgetContents()
{
  //get information about attributes from vector layer
  if ( !mVectorLayer )
  {
    return;
  }

  //combo box row, attributes titles, feature values and current merge results
  mTableWidget->setRowCount( mFeatureList.size() + 2 );

  //create combo boxes and insert attribute names
  const QgsFieldMap& fieldMap = mVectorLayer->pendingFields();

  int col = 0;
  for ( QgsFieldMap::const_iterator fieldIt = fieldMap.constBegin();
        fieldIt != fieldMap.constEnd();
        ++fieldIt )
  {
    if ( mVectorLayer->editType( fieldIt.key() ) == QgsVectorLayer::Hidden ||
         mVectorLayer->editType( fieldIt.key() ) == QgsVectorLayer::Immutable )
      continue;

    mTableWidget->setColumnCount( col + 1 );

    mTableWidget->setCellWidget( 0, col, createMergeComboBox( fieldIt->type() ) );

    QTableWidgetItem *item = new QTableWidgetItem( fieldIt.value().name() );
    item->setData( Qt::UserRole, fieldIt.key() );
    mTableWidget->setHorizontalHeaderItem( col++, item );
  }

  //insert the attribute values
  QStringList verticalHeaderLabels; //the id column is in the
  verticalHeaderLabels << tr( "Id" );

  for ( int i = 0; i < mFeatureList.size(); ++i )
  {
    verticalHeaderLabels << QString::number( mFeatureList[i].id() );

    const QgsAttributeMap &attrs = mFeatureList[i].attributeMap();

    for ( int j = 0; j < mTableWidget->columnCount(); j++ )
    {
      int idx = mTableWidget->horizontalHeaderItem( j )->data( Qt::UserRole ).toInt();

      QTableWidgetItem* attributeValItem = new QTableWidgetItem( attrs[idx].toString() );
      attributeValItem->setFlags( Qt::ItemIsEnabled | Qt::ItemIsSelectable );
      mTableWidget->setItem( i + 1, j, attributeValItem );
      mTableWidget->setCellWidget( i + 1, j, QgsAttributeEditor::createAttributeEditor( mTableWidget, NULL, mVectorLayer, idx, attrs[idx] ) );
    }
  }

  //merge
  verticalHeaderLabels << tr( "Merge" );
  mTableWidget->setVerticalHeaderLabels( verticalHeaderLabels );

  //insert currently merged values
  for ( int i = 0; i < mTableWidget->columnCount(); ++i )
  {
    refreshMergedValue( i );
  }
}