24 , mInitialText( startText )
33 builder->setExpressionContext( context );
34 builder->setLayer( layer );
35 builder->setExpressionText( startText );
36 builder->expressionTree()->loadRecent( mRecentKey );
37 builder->expressionTree()->loadUserExpressions( );
40 connect( buttonBox, &QDialogButtonBox::helpRequested,
this, &QgsExpressionBuilderDialog::showHelp );
55 return builder->expressionText();
60 return builder->expectedOutputFormat();
65 builder->setExpectedOutputFormat( expected );
70 return builder->expressionContext();
75 builder->setExpressionContext( context );
85 builder->expressionTree()->saveToRecent( builder->expressionText(), mRecentKey );
92 if ( builder->expressionText() != mInitialText )
96 const bool askToDiscardEditedExpression = settings.
value( QStringLiteral(
"askToDiscardEditedExpression" ),
true,
QgsSettings::Gui ).toBool();
98 if ( askToDiscardEditedExpression )
100 QMessageBox confirmMessage( QMessageBox::Question,
101 tr(
"Expression was Edited" ),
102 tr(
"The changes to the expression will be discarded. Would you like to continue?" ),
103 QMessageBox::Yes | QMessageBox::No,
105 confirmMessage.setCheckBox(
new QCheckBox( tr(
"Don't show this message again" ) ) );
106 confirmMessage.checkBox()->setChecked(
false );
107 confirmMessage.button( QMessageBox::Yes )->setText( tr(
"Discard changes" ) );
109 int res = confirmMessage.exec();
111 if ( confirmMessage.checkBox()->isChecked() )
116 if ( res != QMessageBox::Yes )
127 builder->setGeomCalculator( da );
132 return mAllowEvalErrors;
141 syncOkButtonEnabledState();
145void QgsExpressionBuilderDialog::showHelp()
150void QgsExpressionBuilderDialog::syncOkButtonEnabledState()
152 QPushButton *okButton = buttonBox->button( QDialogButtonBox::Ok );
154 if ( builder->parserError() )
155 okButton->setEnabled(
false );
157 okButton->setEnabled(
true );
A general purpose distance and area calculator, capable of performing ellipsoid based calculations.
void done(int r) override
Is called when the dialog get accepted or rejected Used to save geometry.
void setGeomCalculator(const QgsDistanceArea &da)
Sets geometry calculator used in distance/area calculations.
QgsExpressionBuilderDialog(QgsVectorLayer *layer, const QString &startText=QString(), QWidget *parent SIP_TRANSFERTHIS=nullptr, const QString &key="generic", const QgsExpressionContext &context=QgsExpressionContext())
void setExpressionText(const QString &text)
void setExpectedOutputFormat(const QString &expected)
Set the expected format string, which is shown in the dialog.
QgsExpressionBuilderWidget * expressionBuilder()
The builder widget that is used by the dialog.
void allowEvalErrorsChanged()
Allow accepting expressions with evaluation errors.
void setExpressionContext(const QgsExpressionContext &context)
Sets the expression context for the dialog.
void setAllowEvalErrors(bool allowEvalErrors)
Allow accepting expressions with evaluation errors.
QString expectedOutputFormat()
Returns the expected format string, which is shown in the dialog.
QgsExpressionContext expressionContext() const
Returns the expression context for the dialog.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
static void enableAutoGeometryRestore(QWidget *widget, const QString &key=QString())
Register the widget to allow its position to be automatically saved and restored when open and closed...
static void openHelp(const QString &key)
Opens help topic for the given help key using default system web browser.
This class is a composition of two QSettings instances:
QVariant value(const QString &key, const QVariant &defaultValue=QVariant(), Section section=NoSection) const
Returns the value for setting key.
void setValue(const QString &key, const QVariant &value, QgsSettings::Section section=QgsSettings::NoSection)
Sets the value of setting key to value.
Represents a vector layer which manages a vector based data sets.