38 #include <QDesktopServices>
40 #include <QWebElement>
42 #include <QHBoxLayout>
50 mMapTipVisible =
false;
58 QPoint &pixelPosition,
68 if ( !pMapCanvas->
layers(
true ).contains( pLayer ) )
74 QString tipText, lastTipText, tipHtml, bodyStyle, containerStyle,
75 backgroundColor, strokeColor, textColor;
78 mWidget =
new QWidget( pMapCanvas );
79 mWidget->setContentsMargins( MARGIN_VALUE, MARGIN_VALUE, MARGIN_VALUE, MARGIN_VALUE );
84 mWebView->page()->setLinkDelegationPolicy( QWebPage::DelegateAllLinks );
85 mWebView->setContextMenuPolicy( Qt::NoContextMenu );
86 connect( mWebView, &QWebView::linkClicked,
this, &QgsMapTip::onLinkClicked );
87 connect( mWebView, &QWebView::loadFinished,
this, [ = ](
bool ) { resizeContent(); } );
90 mWebView->page()->settings()->setAttribute( QWebSettings::DeveloperExtrasEnabled,
true );
91 mWebView->page()->settings()->setAttribute( QWebSettings::JavascriptEnabled,
true );
92 mWebView->page()->settings()->setAttribute( QWebSettings::LocalStorageEnabled,
true );
95 mWebView->page()->mainFrame()->setScrollBarPolicy( Qt::Horizontal, Qt::ScrollBarAlwaysOff );
96 mWebView->page()->mainFrame()->setScrollBarPolicy( Qt::Vertical, Qt::ScrollBarAlwaysOff );
98 QHBoxLayout *layout =
new QHBoxLayout;
99 layout->setContentsMargins( 0, 0, 0, 0 );
100 layout->addWidget( mWebView );
102 mWidget->setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
103 mWidget->setLayout( layout );
106 const int MAX_WIDTH = pMapCanvas->geometry().width() / 2;
107 const int MAX_HEIGHT = pMapCanvas->geometry().height() / 2;
108 mWidget->setMaximumSize( MAX_WIDTH, MAX_HEIGHT );
112 mWidget->resize( 0, 0 );
114 backgroundColor = mWidget->palette().base().color().name();
115 strokeColor = mWidget->palette().shadow().color().name();
116 textColor = mWidget->palette().text().color().name();
117 mWidget->setStyleSheet( QString(
119 "border: 1px solid %1;"
120 "background-color: %2;}" ).arg(
121 strokeColor, backgroundColor ) );
123 tipText = fetchFeature( pLayer, mapPosition, pMapCanvas );
125 mMapTipVisible = !tipText.isEmpty();
126 if ( !mMapTipVisible )
132 if ( tipText == lastTipText )
138 "background-color: %1;"
141 "color: %4;" ).arg( backgroundColor ).arg( mFontSize ).arg( mFontFamily, textColor );
143 containerStyle = QString(
144 "display: inline-block;"
150 "<div id='QgsWebViewContainer' style='%2'>%3</div>"
152 "</html>" ).arg( bodyStyle, containerStyle, tipText );
156 mWidget->move( pixelPosition.x(),
159 mWebView->setHtml( tipHtml );
160 lastTipText = tipText;
165 void QgsMapTip::resizeContent()
169 const QWebElement container = mWebView->page()->mainFrame()->findFirstElement(
170 QStringLiteral(
"#QgsWebViewContainer" ) );
171 const int width = container.geometry().width() + MARGIN_VALUE * 2;
172 const int height = container.geometry().height() + MARGIN_VALUE * 2;
173 mWidget->resize( width, height );
175 mWebView->adjustSize();
181 if ( !mMapTipVisible )
184 mWebView->setHtml( QString() );
188 mMapTipVisible =
false;
216 if ( canvasFilter == QLatin1String(
"FALSE" ) )
227 if ( !canvasFilter.isEmpty() )
230 if ( mapTip.isEmpty() )
232 exp.prepare( &context );
241 std::unique_ptr< QgsFeatureRenderer > renderer;
245 renderer->startRender( renderCtx, vlayer->
fields() );
248 const QString filterExpression = renderer->filter( vlayer->
fields() );
249 if ( ! filterExpression.isEmpty() )
261 context.setFeature( feature );
264 if ( filter && renderer && !renderer->willRenderFeature( feature, renderCtx ) )
269 if ( !mapTip.isEmpty() )
275 tipString = exp.evaluate( &context ).toString();
278 if ( !tipString.isEmpty() || timer.elapsed() >= 1000 )
285 renderer->stopRender( renderCtx );
293 const QFont defaultFont = qApp->font();
294 mFontSize = settings.
value( QStringLiteral(
"/qgis/stylesheet/fontPointSize" ), defaultFont.pointSize() ).toInt();
295 mFontFamily = settings.
value( QStringLiteral(
"/qgis/stylesheet/fontFamily" ), defaultFont.family() ).toString();
299 void QgsMapTip::onLinkClicked(
const QUrl &url )
301 QDesktopServices::openUrl( url );
static QgsExpressionContextScope * mapSettingsScope(const QgsMapSettings &mapSettings)
Creates a new scope which contains variables and functions relating to a QgsMapSettings object.
static QList< QgsExpressionContextScope * > globalProjectLayerScopes(const QgsMapLayer *layer)
Creates a list of three scopes: global, layer's project and layer.
static QgsExpressionContextScope * layerScope(const QgsMapLayer *layer)
Creates a new scope which contains variables and functions relating to a QgsMapLayer.
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").
static QString replaceExpressionText(const QString &action, const QgsExpressionContext *context, const QgsDistanceArea *distanceArea=nullptr)
This function replaces each expression between [% and %] in the string with the result of its evaluat...
Wrapper for iterator of features from vector data provider or vector layer.
bool nextFeature(QgsFeature &f)
virtual QgsFeatureRenderer * clone() const =0
Create a deep copy of this renderer.
@ Filter
Features may be filtered, i.e. some features may not be rendered (categorized, rule based ....
This class wraps a request for features to a vector layer (or directly its vector data provider).
QgsFeatureRequest & combineFilterExpression(const QString &expression)
Modifies the existing filter expression to add an additional expression filter.
QgsFeatureRequest & setFlags(QgsFeatureRequest::Flags flags)
Sets flags that affect how features will be fetched.
QgsFeatureRequest & setSubsetOfAttributes(const QgsAttributeList &attrs)
Set a subset of attributes that will be fetched.
QgsFeatureRequest & setFilterExpression(const QString &expression)
Set the filter expression.
@ ExactIntersect
Use exact geometry intersection (slower) instead of bounding boxes.
QgsFeatureRequest & setExpressionContext(const QgsExpressionContext &context)
Sets the expression context used to evaluate filter expressions.
QgsFeatureRequest & setFilterRect(const QgsRectangle &rectangle)
Sets the rectangle from which features will be taken.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
static QString filterForLayer(QgsMapCanvas *canvas, QgsVectorLayer *layer)
Constructs a filter to use for selecting features from the given layer, in order to apply filters whi...
Map canvas is a class for displaying all GIS data types on a canvas.
QgsExpressionContext createExpressionContext() const override
This method needs to be reimplemented in all classes which implement this interface and return an exp...
QList< QgsMapLayer * > layers(bool expandGroupLayers=false) const
Returns the list of layers shown within the map canvas.
const QgsMapSettings & mapSettings() const
Gets access to properties used for map rendering.
Base class for all map layer types.
bool isInScaleRange(double scale) const
Tests whether the layer should be visible at the specified scale.
double scale() const
Returns the calculated map scale.
QgsPointXY mapToLayerCoordinates(const QgsMapLayer *layer, QgsPointXY point) const
transform point coordinates from output CRS to layer's CRS
void showMapTip(QgsMapLayer *thepLayer, QgsPointXY &mapPosition, QPoint &pixelPosition, QgsMapCanvas *mpMapCanvas)
Show a maptip at a given point on the map canvas.
void clear(QgsMapCanvas *mpMapCanvas=nullptr)
Clear the current maptip if it exists.
QgsMapTip()
Default constructor.
void applyFontSettings()
Apply font family and size to match user settings.
A class to represent a 2D point.
A rectangle specified with double values.
void setYMinimum(double y) SIP_HOLDGIL
Set the minimum y value.
void setXMaximum(double x) SIP_HOLDGIL
Set the maximum x value.
void setXMinimum(double x) SIP_HOLDGIL
Set the minimum x value.
void setYMaximum(double y) SIP_HOLDGIL
Set the maximum y value.
Contains information about the context of a rendering operation.
QgsExpressionContext & expressionContext()
Gets the expression context.
static QgsRenderContext fromMapSettings(const QgsMapSettings &mapSettings)
create initialized QgsRenderContext instance from given QgsMapSettings
void setExpressionContext(const QgsExpressionContext &context)
Sets the expression context.
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.
Represents a vector layer which manages a vector based data sets.
bool isSpatial() const FINAL
Returns true if this is a geometry layer and false in case of NoGeometry (table only) or UnknownGeome...
QgsFeatureIterator getFeatures(const QgsFeatureRequest &request=QgsFeatureRequest()) const FINAL
Queries the layer for features specified in request.
QgsFields fields() const FINAL
Returns the list of fields of this layer.
QString displayExpression
QgsFeatureRenderer * renderer()
Returns the feature renderer used for rendering the features in the layer in 2D map views.
The QgsWebView class is a collection of stubs to mimic the API of QWebView on systems where the real ...