void QgsLabelPropertyDialog::setDataDefinedValues( const QgsPalLayerSettings &layerSettings, QgsVectorLayer* vlayer )
{
//loop through data defined properties and set all the GUI widget values. We can do this
//even if the data defined property is set to an expression, as it's useful to show
//users what the evaluated property is...
QgsExpressionContext context;
context << QgsExpressionContextUtils::globalScope()
<< QgsExpressionContextUtils::projectScope()
<< QgsExpressionContextUtils::atlasScope( nullptr )
<< QgsExpressionContextUtils::mapSettingsScope( QgisApp::instance()->mapCanvas()->mapSettings() )
<< QgsExpressionContextUtils::layerScope( vlayer );
context.setFeature( mCurLabelFeat );
QMap< QgsPalLayerSettings::DataDefinedProperties, QgsDataDefined* >::const_iterator propIt = mDataDefinedProperties.constBegin();
for ( ; propIt != mDataDefinedProperties.constEnd(); ++propIt )
{
QgsDataDefined* dd = propIt.value();
if ( !dd || !dd->isActive() )
{
continue;
}
if ( !dd->expressionIsPrepared() )
{
dd->prepareExpression( context );
}
//TODO - pass expression context
QVariant result = layerSettings.dataDefinedValue( propIt.key(), mCurLabelFeat, vlayer->fields(), &context );
if ( !result.isValid() || result.isNull() )
{
//could not evaluate data defined value
continue;
}
bool ok = false;
switch ( propIt.key() )
{
case QgsPalLayerSettings::Show:
{
int showLabel = result.toInt( &ok );
mShowLabelChkbx->setChecked( !ok || showLabel != 0 );
break;
}
case QgsPalLayerSettings::AlwaysShow:
mAlwaysShowChkbx->setChecked( result.toBool() );
break;
case QgsPalLayerSettings::MinScale:
{
int minScale = result.toInt( &ok );
if ( ok )
{
mMinScaleSpinBox->setValue( minScale );
}
break;
}
case QgsPalLayerSettings::MaxScale:
{
int maxScale = result.toInt( &ok );
if ( ok )
{
mMaxScaleSpinBox->setValue( maxScale );
}
break;
}
case QgsPalLayerSettings::BufferSize:
{
double bufferSize = result.toDouble( &ok );
if ( ok )
{
mBufferSizeSpinBox->setValue( bufferSize );
}
break;
}
case QgsPalLayerSettings::PositionX:
{
double posX = result.toDouble( &ok );
if ( ok )
{
mXCoordSpinBox->setValue( posX );
}
break;
}
case QgsPalLayerSettings::PositionY:
{
double posY = result.toDouble( &ok );
if ( ok )
{
mYCoordSpinBox->setValue( posY );
}
break;
}
case QgsPalLayerSettings::LabelDistance:
{
double labelDist = result.toDouble( &ok );
if ( ok )
{
mLabelDistanceSpinBox->setValue( labelDist );
}
break;
}
case QgsPalLayerSettings::Hali:
mHaliComboBox->setCurrentIndex( mHaliComboBox->findData( result.toString() ) );
break;
case QgsPalLayerSettings::Vali:
mValiComboBox->setCurrentIndex( mValiComboBox->findData( result.toString() ) );
break;
case QgsPalLayerSettings::BufferColor:
mBufferColorButton->setColor( QColor( result.toString() ) );
break;
case QgsPalLayerSettings::Color:
mFontColorButton->setColor( QColor( result.toString() ) );
break;
case QgsPalLayerSettings::Rotation:
{
double rot = result.toDouble( &ok );
if ( ok )
{
mRotationSpinBox->setValue( rot );
}
break;
}
case QgsPalLayerSettings::Size:
{
double size = result.toDouble( &ok );
if ( ok )
{
mFontSizeSpinBox->setValue( size );
}
else
{
mFontSizeSpinBox->setValue( 0 );
}
break;
}
default:
break;
}
}
}
