void QgsPropertyOverrideButton::aboutToShowMenu()
{
mDefineMenu->clear();
// update fields so that changes made to layer's fields are reflected
updateFieldLists();
bool hasExp = !mExpressionString.isEmpty();
QString ddTitle = tr( "Data defined override" );
QAction *ddTitleAct = mDefineMenu->addAction( ddTitle );
QFont titlefont = ddTitleAct->font();
titlefont.setItalic( true );
ddTitleAct->setFont( titlefont );
ddTitleAct->setEnabled( false );
bool addActiveAction = false;
if ( mProperty.propertyType() == QgsProperty::ExpressionBasedProperty && hasExp )
{
QgsExpression exp( mExpressionString );
// whether expression is parse-able
addActiveAction = !exp.hasParserError();
}
else if ( mProperty.propertyType() == QgsProperty::FieldBasedProperty )
{
// whether field exists
addActiveAction = mFieldNameList.contains( mFieldName );
}
if ( addActiveAction )
{
ddTitleAct->setText( ddTitle + " (" + ( mProperty.propertyType() == QgsProperty::ExpressionBasedProperty ? tr( "expression" ) : tr( "field" ) ) + ')' );
mDefineMenu->addAction( mActionActive );
mActionActive->setText( mProperty.isActive() ? tr( "Deactivate" ) : tr( "Activate" ) );
mActionActive->setData( QVariant( !mProperty.isActive() ) );
}
if ( !mFullDescription.isEmpty() )
{
mDefineMenu->addAction( mActionDescription );
}
mDefineMenu->addSeparator();
// deactivate button if field already exists
if ( mAuxiliaryStorageEnabled && mVectorLayer )
{
mDefineMenu->addAction( mActionCreateAuxiliaryField );
const QgsAuxiliaryLayer *alayer = mVectorLayer->auxiliaryLayer();
mActionCreateAuxiliaryField->setEnabled( true );
mActionCreateAuxiliaryField->setChecked( false );
int index = mVectorLayer->fields().indexFromName( mFieldName );
int srcIndex;
if ( index >= 0 && alayer && mVectorLayer->isAuxiliaryField( index, srcIndex ) )
{
mActionCreateAuxiliaryField->setEnabled( false );
mActionCreateAuxiliaryField->setChecked( true );
}
}
bool fieldActive = false;
if ( !mDataTypesString.isEmpty() )
{
QAction *fieldTitleAct = mDefineMenu->addAction( tr( "Attribute field" ) );
fieldTitleAct->setFont( titlefont );
fieldTitleAct->setEnabled( false );
mDefineMenu->addAction( mActionDataTypes );
mFieldsMenu->clear();
if ( !mFieldNameList.isEmpty() )
{
for ( int j = 0; j < mFieldNameList.count(); ++j )
{
QString fldname = mFieldNameList.at( j );
QAction *act = mFieldsMenu->addAction( fldname + " (" + mFieldTypeList.at( j ) + ')' );
act->setData( QVariant( fldname ) );
if ( mFieldName == fldname )
{
act->setCheckable( true );
act->setChecked( mProperty.propertyType() == QgsProperty::FieldBasedProperty );
fieldActive = mProperty.propertyType() == QgsProperty::FieldBasedProperty;
}
}
}
else
{
QAction *act = mFieldsMenu->addAction( tr( "No matching field types found" ) );
act->setEnabled( false );
}
mDefineMenu->addSeparator();
}
mFieldsMenu->menuAction()->setCheckable( true );
mFieldsMenu->menuAction()->setChecked( fieldActive && mProperty.propertyType() == QgsProperty::FieldBasedProperty && !mProperty.transformer() );
QAction *exprTitleAct = mDefineMenu->addAction( tr( "Expression" ) );
exprTitleAct->setFont( titlefont );
exprTitleAct->setEnabled( false );
mVariablesMenu->clear();
bool variableActive = false;
if ( mExpressionContextGenerator )
{
QgsExpressionContext context = mExpressionContextGenerator->createExpressionContext();
QStringList variables = context.variableNames();
Q_FOREACH ( const QString &variable, variables )
{
if ( context.isReadOnly( variable ) ) //only want to show user-set variables
continue;
if ( variable.startsWith( '_' ) ) //no hidden variables
continue;
QAction *act = mVariablesMenu->addAction( variable );
act->setData( QVariant( variable ) );
if ( mProperty.propertyType() == QgsProperty::ExpressionBasedProperty && hasExp && mExpressionString == '@' + variable )
{
act->setCheckable( true );
act->setChecked( true );
variableActive = true;
}
}
}
if ( mVariablesMenu->actions().isEmpty() )
{
QAction *act = mVariablesMenu->addAction( tr( "No variables set" ) );
act->setEnabled( false );
}
mDefineMenu->addAction( mActionVariables );
mVariablesMenu->menuAction()->setCheckable( true );
mVariablesMenu->menuAction()->setChecked( variableActive && !mProperty.transformer() );
if ( hasExp )
{
QString expString = mExpressionString;
if ( expString.length() > 35 )
{
expString.truncate( 35 );
expString.append( QChar( 0x2026 ) );
}
expString.prepend( tr( "Current: " ) );
if ( !mActionExpression )
{
mActionExpression = new QAction( expString, this );
mActionExpression->setCheckable( true );
}
else
{
mActionExpression->setText( expString );
}
mDefineMenu->addAction( mActionExpression );
mActionExpression->setChecked( mProperty.propertyType() == QgsProperty::ExpressionBasedProperty && !variableActive && !mProperty.transformer() );
mDefineMenu->addAction( mActionExpDialog );
mDefineMenu->addAction( mActionCopyExpr );
mDefineMenu->addAction( mActionPasteExpr );
mDefineMenu->addAction( mActionClearExpr );
}
else
{
mDefineMenu->addAction( mActionExpDialog );
mDefineMenu->addAction( mActionPasteExpr );
}
if ( !mDefinition.name().isEmpty() && mDefinition.supportsAssistant() )
{
mDefineMenu->addSeparator();
mActionAssistant->setCheckable( mProperty.transformer() );
mActionAssistant->setChecked( mProperty.transformer() );
mDefineMenu->addAction( mActionAssistant );
}
}
void QgsDataDefinedButton::aboutToShowMenu()
{
mDefineMenu->clear();
bool hasExp = !getExpression().isEmpty();
bool hasField = !getField().isEmpty();
QString ddTitle = tr( "Data defined override" );
QAction* ddTitleAct = mDefineMenu->addAction( ddTitle );
QFont titlefont = ddTitleAct->font();
titlefont.setItalic( true );
ddTitleAct->setFont( titlefont );
ddTitleAct->setEnabled( false );
bool addActiveAction = false;
if ( useExpression() && hasExp )
{
QgsExpression exp( getExpression() );
// whether expression is parse-able
addActiveAction = !exp.hasParserError();
}
else if ( !useExpression() && hasField )
{
// whether field exists
addActiveAction = mFieldNameList.contains( getField() );
}
if ( addActiveAction )
{
ddTitleAct->setText( ddTitle + " (" + ( useExpression() ? tr( "expression" ) : tr( "field" ) ) + ')' );
mDefineMenu->addAction( mActionActive );
mActionActive->setText( isActive() ? tr( "Deactivate" ) : tr( "Activate" ) );
mActionActive->setData( QVariant( isActive() ? false : true ) );
}
if ( !mFullDescription.isEmpty() )
{
mDefineMenu->addAction( mActionDescription );
}
mDefineMenu->addSeparator();
bool fieldActive = false;
if ( !mDataTypesString.isEmpty() )
{
QAction* fieldTitleAct = mDefineMenu->addAction( tr( "Attribute field" ) );
fieldTitleAct->setFont( titlefont );
fieldTitleAct->setEnabled( false );
mDefineMenu->addAction( mActionDataTypes );
mFieldsMenu->clear();
if ( mFieldNameList.size() > 0 )
{
for ( int j = 0; j < mFieldNameList.count(); ++j )
{
QString fldname = mFieldNameList.at( j );
QAction* act = mFieldsMenu->addAction( fldname + " (" + mFieldTypeList.at( j ) + ')' );
act->setData( QVariant( fldname ) );
if ( getField() == fldname )
{
act->setCheckable( true );
act->setChecked( !useExpression() );
fieldActive = !useExpression();
}
}
}
else
{
QAction* act = mFieldsMenu->addAction( tr( "No matching field types found" ) );
act->setEnabled( false );
}
mDefineMenu->addSeparator();
}
mFieldsMenu->menuAction()->setCheckable( true );
mFieldsMenu->menuAction()->setChecked( fieldActive );
QAction* exprTitleAct = mDefineMenu->addAction( tr( "Expression" ) );
exprTitleAct->setFont( titlefont );
exprTitleAct->setEnabled( false );
mVariablesMenu->clear();
bool variableActive = false;
if ( mExpressionContextCallback )
{
QgsExpressionContext context = mExpressionContextCallback( mExpressionContextCallbackContext );
QStringList variables = context.variableNames();
Q_FOREACH ( const QString& variable, variables )
{
if ( context.isReadOnly( variable ) ) //only want to show user-set variables
continue;
if ( variable.startsWith( '_' ) ) //no hidden variables
continue;
QAction* act = mVariablesMenu->addAction( variable );
act->setData( QVariant( variable ) );
if ( useExpression() && hasExp && getExpression() == '@' + variable )
{
act->setCheckable( true );
act->setChecked( true );
variableActive = true;
}
}
}
if ( mVariablesMenu->actions().isEmpty() )
{
QAction* act = mVariablesMenu->addAction( tr( "No variables set" ) );
act->setEnabled( false );
}
mDefineMenu->addAction( mActionVariables );
mVariablesMenu->menuAction()->setCheckable( true );
mVariablesMenu->menuAction()->setChecked( variableActive );
if ( hasExp )
{
QString expString = getExpression();
if ( expString.length() > 35 )
{
expString.truncate( 35 );
expString.append( "..." );
}
expString.prepend( tr( "Current: " ) );
if ( !mActionExpression )
{
mActionExpression = new QAction( expString, this );
mActionExpression->setCheckable( true );
}
else
{
mActionExpression->setText( expString );
}
mDefineMenu->addAction( mActionExpression );
mActionExpression->setChecked( useExpression() && !variableActive );
mDefineMenu->addAction( mActionExpDialog );
mDefineMenu->addAction( mActionCopyExpr );
mDefineMenu->addAction( mActionPasteExpr );
mDefineMenu->addAction( mActionClearExpr );
}
else
{
mDefineMenu->addAction( mActionExpDialog );
mDefineMenu->addAction( mActionPasteExpr );
}
if ( mAssistant.data() )
{
mDefineMenu->addSeparator();
mDefineMenu->addAction( mActionAssistant );
}
}