C++ (Cpp) QgsSymbolV2::startRender Examples

Example #1

File: qgsgraduatedsymbolrendererv2.cpp Project: CSRedRat/QGIS

void QgsGraduatedSymbolRendererV2::startRender( QgsRenderContext& context, const QgsFields& fields )
{
  // find out classification attribute index from name
  mAttrNum = fields.fieldNameIndex( mAttrName );

  if ( mAttrNum == -1 )
  {
    mExpression.reset( new QgsExpression( mAttrName ) );
    mExpression->prepare( fields );
  }

  QgsRangeList::iterator it = mRanges.begin();
  for ( ; it != mRanges.end(); ++it )
  {
    it->symbol()->startRender( context, &fields );

    if ( mRotation.data() || mSizeScale.data() )
    {
      QgsSymbolV2* tempSymbol = it->symbol()->clone();
      tempSymbol->setRenderHints(( mRotation.data() ? QgsSymbolV2::DataDefinedRotation : 0 ) |
                                 ( mSizeScale.data() ? QgsSymbolV2::DataDefinedSizeScale : 0 ) );
      tempSymbol->startRender( context, &fields );
      mTempSymbols[ it->symbol()] = tempSymbol;
    }
  }
}

Example #2

File: qgscategorizedsymbolrendererv2.cpp Project: CSRedRat/QGIS

void QgsCategorizedSymbolRendererV2::startRender( QgsRenderContext& context, const QgsFields& fields )
{
  // make sure that the hash table is up to date
  rebuildHash();

  // find out classification attribute index from name
  mAttrNum = fields.fieldNameIndex( mAttrName );
  if ( mAttrNum == -1 )
  {
    mExpression.reset( new QgsExpression( mAttrName ) );
    mExpression->prepare( fields );
  }

  QgsCategoryList::iterator it = mCategories.begin();
  for ( ; it != mCategories.end(); ++it )
  {
    it->symbol()->startRender( context, &fields );

    if ( mRotation.data() || mSizeScale.data() )
    {
      QgsSymbolV2* tempSymbol = it->symbol()->clone();
      tempSymbol->setRenderHints(( mRotation.data() ? QgsSymbolV2::DataDefinedRotation : 0 ) |
                                 ( mSizeScale.data() ? QgsSymbolV2::DataDefinedSizeScale : 0 ) );
      tempSymbol->startRender( context, &fields );
      mTempSymbols[ it->value().toString()] = tempSymbol;
    }
  }

}

Example #3

File: qgscategorizedsymbolrendererv2.cpp Project: Adam-Brown/Quantum-GIS

void QgsCategorizedSymbolRendererV2::startRender( QgsRenderContext& context, const QgsVectorLayer *vlayer )
{
  // make sure that the hash table is up to date
  rebuildHash();

  // find out classification attribute index from name
  mAttrNum = vlayer ? vlayer->fieldNameIndex( mAttrName ) : -1;

  mRotationFieldIdx  = ( mRotationField.isEmpty()  ? -1 : vlayer->fieldNameIndex( mRotationField ) );
  mSizeScaleFieldIdx = ( mSizeScaleField.isEmpty() ? -1 : vlayer->fieldNameIndex( mSizeScaleField ) );

  QgsCategoryList::iterator it = mCategories.begin();
  for ( ; it != mCategories.end(); ++it )
  {
    it->symbol()->startRender( context, vlayer );

    if ( mRotationFieldIdx != -1 || mSizeScaleFieldIdx != -1 )
    {
      QgsSymbolV2* tempSymbol = it->symbol()->clone();
      tempSymbol->setRenderHints(( mRotationFieldIdx != -1 ? QgsSymbolV2::DataDefinedRotation : 0 ) |
                                 ( mSizeScaleFieldIdx != -1 ? QgsSymbolV2::DataDefinedSizeScale : 0 ) );
      tempSymbol->startRender( context, vlayer );
      mTempSymbols[ it->value().toString()] = tempSymbol;
    }
  }

}

Example #4

File: qgscategorizedsymbolrendererv2.cpp Project: ThomasG77/QGIS

void QgsCategorizedSymbolRendererV2::startRender( QgsRenderContext& context, const QgsFields& fields )
{
  mCounting = context.rendererScale() == 0.0;

  // make sure that the hash table is up to date
  rebuildHash();

  // find out classification attribute index from name
  mAttrNum = fields.fieldNameIndex( mAttrName );
  if ( mAttrNum == -1 )
  {
    mExpression.reset( new QgsExpression( mAttrName ) );
    mExpression->prepare( &context.expressionContext() );
  }

  Q_FOREACH ( const QgsRendererCategoryV2& cat, mCategories )
  {
    cat.symbol()->startRender( context, &fields );

    if ( mRotation.data() || mSizeScale.data() )
    {
      QgsSymbolV2* tempSymbol = cat.symbol()->clone();
      tempSymbol->setRenderHints(( mRotation.data() ? QgsSymbolV2::DataDefinedRotation : 0 ) |
                                 ( mSizeScale.data() ? QgsSymbolV2::DataDefinedSizeScale : 0 ) );
      tempSymbol->startRender( context, &fields );
      mTempSymbols[ cat.symbol()] = tempSymbol;
    }
  }

Example #5

File: qgsgraduatedsymbolrendererv2.cpp Project: biolds/Quantum-GIS

void QgsGraduatedSymbolRendererV2::startRender( QgsRenderContext& context, const QgsVectorLayer *vlayer )
{
  // find out classification attribute index from name
  mAttrNum = vlayer ? vlayer->fieldNameIndex( mAttrName ) : -1;

  mRotationFieldIdx  = ( mRotationField.isEmpty()  ? -1 : vlayer->fieldNameIndex( mRotationField ) );
  mSizeScaleFieldIdx = ( mSizeScaleField.isEmpty() ? -1 : vlayer->fieldNameIndex( mSizeScaleField ) );

  QgsRangeList::iterator it = mRanges.begin();
  for ( ; it != mRanges.end(); ++it )
  {
    it->symbol()->startRender( context, vlayer );

    if ( mRotationFieldIdx != -1 || mSizeScaleFieldIdx != -1 )
    {
      QgsSymbolV2* tempSymbol = it->symbol()->clone();
      tempSymbol->setRenderHints(( mRotationFieldIdx != -1 ? QgsSymbolV2::DataDefinedRotation : 0 ) |
                                 ( mSizeScaleFieldIdx != -1 ? QgsSymbolV2::DataDefinedSizeScale : 0 ) );
      tempSymbol->startRender( context, vlayer );
      mTempSymbols[ it->symbol()] = tempSymbol;
    }
  }
}