void QgsPropertyOverrideButton::showAssistant()
{
//first step - try to convert any existing expression to a transformer if one doesn't
//already exist
if ( !mProperty.transformer() )
{
( void )mProperty.convertToTransformer();
}
QgsPanelWidget *panel = QgsPanelWidget::findParentPanel( this );
QgsPropertyAssistantWidget *widget = new QgsPropertyAssistantWidget( panel, mDefinition, mProperty, mVectorLayer );
widget->registerExpressionContextGenerator( mExpressionContextGenerator );
widget->setSymbol( mSymbol ); // we only show legend preview in dialog version
if ( panel && panel->dockMode() )
{
connect( widget, &QgsPropertyAssistantWidget::widgetChanged, this, [this, widget]
{
widget->updateProperty( this->mProperty );
mExpressionString = this->mProperty.asExpression();
mFieldName = this->mProperty.field();
updateSiblingWidgets( isActive() );
this->emit changed();
} );
connect( widget, &QgsPropertyAssistantWidget::panelAccepted, this, [ = ] { updateGui(); } );
panel->openPanel( widget );
return;
}
else
{
// Show the dialog version if not in a panel
QDialog *dlg = new QDialog( this );
QString key = QStringLiteral( "/UI/paneldialog/%1" ).arg( widget->panelTitle() );
QgsSettings settings;
dlg->restoreGeometry( settings.value( key ).toByteArray() );
dlg->setWindowTitle( widget->panelTitle() );
dlg->setLayout( new QVBoxLayout() );
dlg->layout()->addWidget( widget );
QDialogButtonBox *buttonBox = new QDialogButtonBox( QDialogButtonBox::Cancel | QDialogButtonBox::Help | QDialogButtonBox::Ok );
connect( buttonBox, &QDialogButtonBox::accepted, dlg, &QDialog::accept );
connect( buttonBox, &QDialogButtonBox::rejected, dlg, &QDialog::reject );
connect( buttonBox, &QDialogButtonBox::helpRequested, this, &QgsPropertyOverrideButton::showHelp );
dlg->layout()->addWidget( buttonBox );
if ( dlg->exec() == QDialog::Accepted )
{
widget->updateProperty( mProperty );
mExpressionString = mProperty.asExpression();
mFieldName = mProperty.field();
widget->acceptPanel();
updateSiblingWidgets( isActive() );
updateGui();
emit changed();
}
settings.setValue( key, dlg->saveGeometry() );
}
}
void QgsPropertyOverrideButton::setToProperty( const QgsProperty &property )
{
if ( property )
{
switch ( property.propertyType() )
{
case QgsProperty::StaticProperty:
case QgsProperty::InvalidProperty:
break;
case QgsProperty::FieldBasedProperty:
{
mFieldName = property.field();
break;
}
case QgsProperty::ExpressionBasedProperty:
{
mExpressionString = property.expressionString();
break;
}
}
}
else
{
mFieldName.clear();
mExpressionString.clear();
}
mProperty = property;
setActive( mProperty && mProperty.isActive() );
updateSiblingWidgets( isActive() );
updateGui();
}
void QgsPropertyOverrideButton::registerExpressionWidget( QWidget *widget )
{
Q_FOREACH ( const SiblingWidget &sw, mSiblingWidgets )
{
if ( widget == sw.mWidgetPointer.data() && sw.mSiblingType == SiblingExpressionText )
return;
}
mSiblingWidgets.append( SiblingWidget( QPointer<QWidget>( widget ), SiblingExpressionText ) );
updateSiblingWidgets( isActive() );
}
void QgsPropertyOverrideButton::registerVisibleWidget( QWidget *widget, bool natural )
{
Q_FOREACH ( const SiblingWidget &sw, mSiblingWidgets )
{
if ( widget == sw.mWidgetPointer.data() && sw.mSiblingType == SiblingVisibility )
return;
}
mSiblingWidgets.append( SiblingWidget( QPointer<QWidget>( widget ), SiblingVisibility, natural ) );
updateSiblingWidgets( isActive() );
}
void QgsPropertyOverrideButton::init( int propertyKey, const QgsProperty &property, const QgsPropertyDefinition &definition, const QgsVectorLayer *layer, bool auxiliaryStorageEnabled )
{
mVectorLayer = layer;
mAuxiliaryStorageEnabled = auxiliaryStorageEnabled;
setToProperty( property );
mPropertyKey = propertyKey;
mDefinition = definition;
mDataTypes = mDefinition.dataType();
mInputDescription = mDefinition.helpText();
mFullDescription.clear();
mUsageInfo.clear();
// set up data types string
mDataTypesString.clear();
QStringList ts;
switch ( mDataTypes )
{
case QgsPropertyDefinition::DataTypeBoolean:
ts << tr( "boolean" );
FALLTHROUGH
case QgsPropertyDefinition::DataTypeNumeric:
ts << tr( "int" );
ts << tr( "double" );
FALLTHROUGH
case QgsPropertyDefinition::DataTypeString:
ts << tr( "string" );
break;
}
if ( !ts.isEmpty() )
{
mDataTypesString = ts.join( QStringLiteral( ", " ) );
mActionDataTypes->setText( tr( "Field type: " ) + mDataTypesString );
}
updateFieldLists();
updateGui();
updateSiblingWidgets( isActive() );
}
void QgsPropertyOverrideButton::registerLinkedWidget( QWidget *widget )
{
for ( const SiblingWidget &sw : qgis::as_const( mSiblingWidgets ) )
{
if ( widget == sw.mWidgetPointer.data() && sw.mSiblingType == SiblingLinkedWidget )
return;
}
mSiblingWidgets.append( SiblingWidget( QPointer<QWidget>( widget ), SiblingLinkedWidget ) );
if ( QgsColorButton *cb = qobject_cast< QgsColorButton * >( widget ) )
{
connect( cb, &QgsColorButton::unlinked, this, [ = ]
{
setActive( false );
updateGui();
} );
}
updateSiblingWidgets( isActive() );
}
void QgsPropertyOverrideButton::showExpressionDialog()
{
QgsExpressionContext context = mExpressionContextGenerator ? mExpressionContextGenerator->createExpressionContext() : QgsExpressionContext();
// build sensible initial expression text - see https://issues.qgis.org/issues/18638
QString currentExpression = ( mProperty.propertyType() == QgsProperty::StaticProperty && !mProperty.staticValue().isValid() ) ? QString()
: mProperty.asExpression();
QgsExpressionBuilderDialog d( const_cast<QgsVectorLayer *>( mVectorLayer ), currentExpression, this, QStringLiteral( "generic" ), context );
d.setExpectedOutputFormat( mInputDescription );
if ( d.exec() == QDialog::Accepted )
{
mExpressionString = d.expressionText().trimmed();
mProperty.setExpressionString( mExpressionString );
mProperty.setTransformer( nullptr );
setActivePrivate( !mExpressionString.isEmpty() );
updateSiblingWidgets( isActive() );
updateGui();
emit changed();
}
activateWindow(); // reset focus to parent window
}
void QgsPropertyOverrideButton::menuActionTriggered( QAction *action )
{
if ( action == mActionActive )
{
setActivePrivate( mActionActive->data().toBool() );
updateGui();
emit changed();
}
else if ( action == mActionDescription )
{
showDescriptionDialog();
}
else if ( action == mActionExpDialog )
{
showExpressionDialog();
}
else if ( action == mActionExpression )
{
mProperty.setExpressionString( mExpressionString );
mProperty.setTransformer( nullptr );
setActivePrivate( true );
updateSiblingWidgets( isActive() );
updateGui();
emit changed();
}
else if ( action == mActionCopyExpr )
{
QApplication::clipboard()->setText( mExpressionString );
}
else if ( action == mActionPasteExpr )
{
QString exprString = QApplication::clipboard()->text();
if ( !exprString.isEmpty() )
{
mExpressionString = exprString;
mProperty.setExpressionString( mExpressionString );
mProperty.setTransformer( nullptr );
setActivePrivate( true );
updateSiblingWidgets( isActive() );
updateGui();
emit changed();
}
}
else if ( action == mActionClearExpr )
{
setActivePrivate( false );
mProperty.setStaticValue( QVariant() );
mProperty.setTransformer( nullptr );
mExpressionString.clear();
updateSiblingWidgets( isActive() );
updateGui();
emit changed();
}
else if ( action == mActionAssistant )
{
showAssistant();
}
else if ( action == mActionCreateAuxiliaryField )
{
emit createAuxiliaryField();
}
else if ( mFieldsMenu->actions().contains( action ) ) // a field name clicked
{
if ( action->isEnabled() )
{
if ( mFieldName != action->text() )
{
mFieldName = action->data().toString();
}
mProperty.setField( mFieldName );
mProperty.setTransformer( nullptr );
setActivePrivate( true );
updateSiblingWidgets( isActive() );
updateGui();
emit changed();
}
}
else if ( mVariablesMenu->actions().contains( action ) ) // a variable name clicked
{
if ( mExpressionString != action->text().prepend( "@" ) )
{
mExpressionString = action->data().toString().prepend( "@" );
}
mProperty.setExpressionString( mExpressionString );
mProperty.setTransformer( nullptr );
setActivePrivate( true );
updateSiblingWidgets( isActive() );
updateGui();
emit changed();
}
}
