45 if ( attributeChanged )
47 if ( mRequiresFormScope )
61 mWidget = qobject_cast<QgsWebView *>( editor );
66 mWidget->setHtml( mHtmlCode.replace(
"\n",
" " ) );
70 const int horizontalDpi = mWidget->logicalDpiX();
72 mWidget->setZoomFactor( horizontalDpi / 96.0 );
75 connect( page, &QWebPage::contentsChanged,
this, &QgsHtmlWidgetWrapper::fixHeight, Qt::ConnectionType::UniqueConnection );
76 connect( page, &QWebPage::loadFinished,
this, &QgsHtmlWidgetWrapper::fixHeight, Qt::ConnectionType::UniqueConnection );
91void QgsHtmlWidgetWrapper::checkGeometryNeeds()
99 NeedsGeometryEvaluator evaluator;
105 evaluator.setExpressionContext( expressionContext );
108 auto frame = webView.page()->mainFrame();
109 connect( frame, &QWebFrame::javaScriptWindowObjectCleared, frame, [ frame, &evaluator ]
111 frame->addToJavaScriptWindowObject( QStringLiteral(
"expression" ), &evaluator );
114 webView.setHtml( mHtmlCode );
116 mNeedsGeometry = evaluator.needsGeometry();
121 mHtmlCode = htmlCode;
124 const thread_local QRegularExpression expRe( QStringLiteral( R
"re(expression.evaluate\s*\(\s*"(.*)"\))re" ), QRegularExpression::PatternOption::MultilineOption | QRegularExpression::PatternOption::DotMatchesEverythingOption );
125 QRegularExpressionMatchIterator matchIt = expRe.globalMatch( mHtmlCode );
126 while ( !ok && matchIt.hasNext() )
128 const QRegularExpressionMatch match = matchIt.next();
132 mRequiresFormScope = ok;
134 checkGeometryNeeds();
137void QgsHtmlWidgetWrapper::setHtmlContext( )
152 HtmlExpression *htmlExpression =
new HtmlExpression();
153 htmlExpression->setExpressionContext( expressionContext );
154 auto frame = mWidget->page()->mainFrame();
155 connect( frame, &QWebFrame::javaScriptWindowObjectCleared, frame, [ = ]
157 frame->addToJavaScriptWindowObject( QStringLiteral(
"expression" ), htmlExpression );
160 mWidget->setHtml( mHtmlCode );
164void QgsHtmlWidgetWrapper::fixHeight()
167 const int docHeight { page->mainFrame()->contentsSize().height() };
168 mWidget->setFixedHeight( docHeight );
178 mFormFeature = feature;
184 return mNeedsGeometry;
191 mExpressionContext = context;
194QString HtmlExpression::evaluate(
const QString &expression )
const
197 exp.
prepare( &mExpressionContext );
198 return exp.evaluate( &mExpressionContext ).toString();
201void NeedsGeometryEvaluator::evaluate(
const QString &expression )
204 exp.
prepare( &mExpressionContext );
205 mNeedsGeometry |= exp.needsGeometry();
210 mExpressionContext = context;
The QWebPage class is a collection of stubs to mimic the API of a QWebPage on systems where QtWebkit ...
This class contains context information for attribute editor widgets.
QString attributeFormModeString() const
Returns given attributeFormMode as string.
QgsFeature parentFormFeature() const
Returns the feature of the currently edited parent form in its actual state.
static QgsExpressionContextScope * parentFormScope(const QgsFeature &formFeature=QgsFeature(), const QString &formMode=QString())
Creates a new scope which contains functions and variables from the current parent attribute form/tab...
static QgsExpressionContextScope * formScope(const QgsFeature &formFeature=QgsFeature(), const QString &formMode=QString())
Creates a new scope which contains functions and variables from the current attribute form/table form...
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
void setFeature(const QgsFeature &feature)
Convenience function for setting a feature for the context.
Class for parsing and evaluation of expressions (formerly called "search strings").
bool prepare(const QgsExpressionContext *context)
Gets the expression ready for evaluation - find out column indexes.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Q_INVOKABLE bool setAttribute(int field, const QVariant &attr)
Sets an attribute's value by field index.
bool isValid() const
Returns the validity of this feature.
Represents a vector layer which manages a vector based data sets.
QgsExpressionContext createExpressionContext() const FINAL
This method needs to be reimplemented in all classes which implement this interface and return an exp...
The QgsWebView class is a collection of stubs to mimic the API of QWebView on systems where the real ...