QGIS API Documentation 3.27.0-Master (f261cc1f8b)
qgsexpressionstoredialog.cpp
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1/***************************************************************************
2 qgsexpressionstoredialog.cpp
3 ---------------------
4 begin : December 2019
5 copyright : (C) 2019 by Alessandro Pasotti
6 email : elpaso at itopen dot it
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15
17#include <QPushButton>
18#include <QStyle>
19
20QgsExpressionStoreDialog::QgsExpressionStoreDialog( const QString &label, const QString &expression, const QString &helpText, const QStringList &existingLabels, QWidget *parent )
21 : QDialog( parent )
22 , mExistingLabels( existingLabels )
23 , mOriginalLabel( label )
24{
25 setupUi( this );
26 mExpression->setText( expression );
27 mHelpText->setText( helpText );
28 connect( buttonBox, &QDialogButtonBox::accepted, this, &QgsExpressionStoreDialog::accept );
29 connect( buttonBox, &QDialogButtonBox::rejected, this, &QgsExpressionStoreDialog::reject );
30 mValidationError->hide();
31 mValidationError->setStyleSheet( QStringLiteral( "QLabel { color : red; }" ) );
32 QPushButton *saveBtn { buttonBox->button( QDialogButtonBox::StandardButton::Save ) };
33 saveBtn->setEnabled( false );
34 connect( mLabel, &QLineEdit::textChanged, this, [ = ]( const QString & text )
35 {
36 QString errorMessage;
37 if ( mOriginalLabel.simplified() != text.simplified() &&
38 mExistingLabels.contains( text.simplified() ) )
39 {
40 errorMessage = tr( "A stored expression with this name already exists" );
41 }
42 else if ( text.contains( '/' ) || text.contains( '\\' ) )
43 {
44 errorMessage = tr( "Labels cannot contain slashes (/ or \\)" );
45 }
46 if ( ! errorMessage.isEmpty() )
47 {
48 mValidationError->show();
49 mValidationError->setText( errorMessage );
50 saveBtn->setEnabled( false );
51 }
52 else
53 {
54 mValidationError->hide();
55 saveBtn->setEnabled( true );
56 }
57 } );
58 // No slashes in labels!
59 QString labelFixed { label };
60 labelFixed.remove( '/' ).remove( '\\' );
61 mLabel->setText( labelFixed.simplified() );
62}
63
65{
66 // remove meta qrichtext instruction from html. It fails rendering
67 // when mixing with other html content
68 // see issue https://github.com/qgis/QGIS/issues/36191
69 return mHelpText->toHtml().replace( "<meta name=\"qrichtext\" content=\"1\" />", QString() );
70}
QString label()
Returns the label text.
QString expression()
Returns the expression text.
QgsExpressionStoreDialog(const QString &label, const QString &expression, const QString &helpText, const QStringList &existingLabels=QStringList(), QWidget *parent=nullptr)
Creates a QgsExpressionStoreDialog with given label, expression and helpText.
QString helpText() const
Returns the help text.