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Some expression functions insist on a complete context which we sometimes are not able to provide. The user might still have enough knowledge that the expression is valid and an error will still be shown.
113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
/***************************************************************************
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qgisexpressionbuilderdialog.h - A generic expression string builder dialog.
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--------------------------------------
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Date : 29-May-2011
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Copyright : (C) 2011 by Nathan Woodrow
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Email : woodrow.nathan at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgsexpressionbuilderdialog.h"
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#include "qgssettings.h"
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#include "qgsguiutils.h"
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#include "qgsgui.h"
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QgsExpressionBuilderDialog::QgsExpressionBuilderDialog( QgsVectorLayer *layer, const QString &startText, QWidget *parent, const QString &key, const QgsExpressionContext &context )
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: QDialog( parent )
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, mRecentKey( key )
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{
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setupUi( this );
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QgsGui::instance()->enableAutoGeometryRestore( this );
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connect( builder, &QgsExpressionBuilderWidget::parserErrorChanged, this, &QgsExpressionBuilderDialog::syncOkButtonEnabledState );
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connect( builder, &QgsExpressionBuilderWidget::evalErrorChanged, this, &QgsExpressionBuilderDialog::syncOkButtonEnabledState );
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builder->setExpressionContext( context );
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builder->setLayer( layer );
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builder->setExpressionText( startText );
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builder->loadFieldNames();
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builder->loadRecent( mRecentKey );
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connect( buttonBox, &QDialogButtonBox::helpRequested, this, &QgsExpressionBuilderDialog::showHelp );
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}
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QgsExpressionBuilderWidget *QgsExpressionBuilderDialog::expressionBuilder()
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{
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return builder;
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}
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void QgsExpressionBuilderDialog::setExpressionText( const QString &text )
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{
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builder->setExpressionText( text );
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}
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QString QgsExpressionBuilderDialog::expressionText()
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{
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return builder->expressionText();
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}
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QgsExpressionContext QgsExpressionBuilderDialog::expressionContext() const
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{
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return builder->expressionContext();
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}
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void QgsExpressionBuilderDialog::setExpressionContext( const QgsExpressionContext &context )
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{
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builder->setExpressionContext( context );
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}
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void QgsExpressionBuilderDialog::done( int r )
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{
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QDialog::done( r );
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}
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void QgsExpressionBuilderDialog::accept()
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{
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builder->saveToRecent( mRecentKey );
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QDialog::accept();
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}
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void QgsExpressionBuilderDialog::setGeomCalculator( const QgsDistanceArea &da )
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{
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// Store in child widget only.
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builder->setGeomCalculator( da );
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}
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bool QgsExpressionBuilderDialog::allowEvalErrors() const
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{
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return mAllowEvalErrors;
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}
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void QgsExpressionBuilderDialog::setAllowEvalErrors( bool allowEvalErrors )
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{
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if ( allowEvalErrors == mAllowEvalErrors )
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return;
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mAllowEvalErrors = allowEvalErrors;
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syncOkButtonEnabledState();
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emit allowEvalErrorsChanged();
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}
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void QgsExpressionBuilderDialog::showHelp()
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{
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QgsHelp::openHelp( QStringLiteral( "working_with_vector/expression.html" ) );
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}
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void QgsExpressionBuilderDialog::syncOkButtonEnabledState()
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{
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QPushButton *okButton = buttonBox->button( QDialogButtonBox::Ok );
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if ( builder->parserError() )
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okButton->setEnabled( false );
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else if ( !builder->evalError() || mAllowEvalErrors )
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okButton->setEnabled( true );
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else
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okButton->setEnabled( true );
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}
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