38#include <QDesktopServices>
47const QString QgsMapTip::sMapTipTemplate =
"<html>\n"
52 " font: %1pt \"%2\";\n"
56 " #QgsWebViewContainer {\n"
57 " background-color: %5;\n"
58 " border: 1px solid %6;\n"
59 " display: inline-block;\n"
62 " #QgsWebViewContainerInner {\n"
68 " <div id='QgsWebViewContainer'>\n"
69 " <div id='QgsWebViewContainerInner'>\n"
80 mMapTipVisible =
false;
82 mDelayedClearTimer.setSingleShot(
true );
83 connect( &mDelayedClearTimer, &QTimer::timeout,
this, [ = ]() {this->
clear();} );
88 const QPoint &pixelPosition,
98 if ( !pMapCanvas->
layers(
true ).contains( pLayer ) )
104 if ( mWebView && mWebView->underMouse() )
110 QString tipText, lastTipText, tipHtml;
119 QColor transparentColor = mWebView->palette().color( QPalette::Window );
120 transparentColor.setAlpha( 0 );
121 mWebView->setStyleSheet( QString(
"background:%1;" ).arg( transparentColor.name( QColor::HexArgb ) ) );
125 mWebView->page()->setLinkDelegationPolicy( QWebPage::DelegateAllLinks );
126 mWebView->setContextMenuPolicy( Qt::NoContextMenu );
127 connect( mWebView, &QWebView::linkClicked,
this, &QgsMapTip::onLinkClicked );
128 connect( mWebView, &QWebView::loadFinished,
this, [ = ](
bool ) { resizeAndMoveToolTip(); } );
131 mWebView->page()->settings()->setAttribute( QWebSettings::DeveloperExtrasEnabled,
true );
132 mWebView->page()->settings()->setAttribute( QWebSettings::JavascriptEnabled,
true );
133 mWebView->page()->settings()->setAttribute( QWebSettings::LocalStorageEnabled,
true );
136 mWebView->page()->mainFrame()->setScrollBarPolicy( Qt::Horizontal, Qt::ScrollBarAlwaysOff );
137 mWebView->page()->mainFrame()->setScrollBarPolicy( Qt::Vertical, Qt::ScrollBarAlwaysOff );
142 switch ( pLayer->
type() )
145 tipText = fetchFeature( pLayer, mapPosition, pMapCanvas );
148 tipText = fetchRaster( pLayer, mapPosition, pMapCanvas );
154 mMapTipVisible = !tipText.isEmpty();
155 if ( !mMapTipVisible )
161 if ( tipText == lastTipText )
167 int cursorOffset = 0;
174 cursorOffset =
static_cast< int >( std::ceil( scale * 32 ) );
178 const int MAX_WIDTH = std::max( pixelPosition.x(), pMapCanvas->width() - pixelPosition.x() ) - cursorOffset - 5;
179 const int MAX_HEIGHT = std::max( pixelPosition.y(), pMapCanvas->height() - pixelPosition.y() ) - 5;
181 mWebView->setMaximumSize( MAX_WIDTH, MAX_HEIGHT );
183 tipHtml = QgsMapTip::htmlText( tipText, MAX_WIDTH );
187 mPosition = pixelPosition;
188 mMapCanvas = pMapCanvas;
189 mWebView->setHtml( tipHtml );
190 lastTipText = tipText;
193 resizeAndMoveToolTip();
198void QgsMapTip::resizeAndMoveToolTip()
202 const QWebElement container = mWebView->page()->mainFrame()->findFirstElement(
203 QStringLiteral(
"#QgsWebViewContainer" ) );
204 const int width = container.geometry().width();
205 const int height = container.geometry().height();
206 mWebView->resize( width, height );
208 mWebView->adjustSize();
211 int cursorOffset = 0;
219 cursorOffset =
static_cast< int >( std::ceil( scale * 32 ) );
224 mWebView->move( mPosition );
230 int availableWidthRight = mMapCanvas->width() - mPosition.x() - cursorOffset;
231 int availableWidthLeft = mPosition.x() - cursorOffset;
232 int availableHeightBottom = mMapCanvas->height() - mPosition.y();
233 int availableHeightTop = mPosition.y();
236 if ( mWebView->width() < availableWidthRight || availableWidthRight > availableWidthLeft )
238 x = mPosition.x() + cursorOffset;
243 x = mPosition.x() - mWebView->width() - cursorOffset;
247 if ( mWebView->height() < availableHeightBottom || availableHeightBottom > availableHeightTop )
254 y = mPosition.y() - mWebView->height();
256 mWebView->move( x, y );
262 if ( !mMapTipVisible )
268 if ( mDelayedClearTimer.isActive() || mWebView->underMouse() )
275 mDelayedClearTimer.start( msDelay );
278 mWebView->setHtml( QString() );
282 mMapTipVisible =
false;
314 if ( canvasFilter == QLatin1String(
"FALSE" ) )
327 if ( !canvasFilter.isEmpty() )
332 if ( mapTip.isEmpty() )
334 exp.prepare( &context );
343 std::unique_ptr< QgsFeatureRenderer > renderer;
347 renderer->startRender( renderCtx, vlayer->
fields() );
350 const QString filterExpression = renderer->filter( vlayer->
fields() );
351 if ( ! filterExpression.isEmpty() )
363 context.setFeature( feature );
366 if ( filter && renderer && !renderer->willRenderFeature( feature, renderCtx ) )
371 if ( !mapTip.isEmpty() )
377 tipString = exp.evaluate( &context ).toString();
380 if ( !tipString.isEmpty() || timer.elapsed() >= 1000 )
388 renderer->stopRender( renderCtx );
426QString QgsMapTip::htmlText(
const QString &text,
int maxWidth )
430 const QFont defaultFont = qApp->font();
431 const int fontSize = defaultFont.pointSize();
432 const QString fontFamily = defaultFont.family();
433 const QString backgroundColor = QgsApplication::palette().base().color().name();
434 const QString strokeColor = QgsApplication::palette().shadow().color().name();
435 const QString textColor = QgsApplication::palette().toolTipText().color().name();
436 return sMapTipTemplate.arg( fontSize ).arg( fontFamily ).arg( textColor ).arg( maxWidth == -1 ?
"" : QString::number( maxWidth ) ).arg( backgroundColor ).arg( strokeColor ).arg( text );
440void QgsMapTip::onLinkClicked(
const QUrl &url )
442 QDesktopServices::openUrl( url );
450 if ( !mapCanvas || !vlayer || !vlayer->
isSpatial() )
454 if ( mapTemplate.isEmpty() && displayExpression.isEmpty() )
476 if ( mapTemplate.isEmpty() )
480 tipText = exp.
evaluate( &context ).toString();
488 return QgsMapTip::htmlText( tipText, mapCanvas->width() / 2 );
495 if ( !mapCanvas || !rlayer || mapTemplate.isEmpty() )
512 return QgsMapTip::htmlText( tipText, mapCanvas->width() / 2 );
@ ExactIntersect
Use exact geometry intersection (slower) instead of bounding boxes.
static const double UI_SCALE_FACTOR
UI scaling factor.
static QgsApplication * instance()
Returns the singleton instance of the QgsApplication.
static QgsExpressionContextScope * mapLayerPositionScope(const QgsPointXY &position)
Sets the expression context variables which are available for expressions triggered by moving the mou...
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 appendScope(QgsExpressionContextScope *scope)
Appends a scope to the end of the context.
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.
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...
QVariant evaluate()
Evaluate the feature and return the result.
Wrapper for iterator of features from vector data provider or vector layer.
bool nextFeature(QgsFeature &f)
Fetch next feature and stores in f, returns true on success.
@ Filter
Features may be filtered, i.e. some features may not be rendered (categorized, rule based ....
virtual QgsFeatureRenderer * clone() const =0
Create a deep copy of this renderer.
This class wraps a request for features to a vector layer (or directly its vector data provider).
QgsFeatureRequest & setFlags(Qgis::FeatureRequestFlags flags)
Sets flags that affect how features will be fetched.
QgsFeatureRequest & combineFilterExpression(const QString &expression)
Modifies the existing filter expression to add an additional expression filter.
QgsFeatureRequest & setSubsetOfAttributes(const QgsAttributeList &attrs)
Set a subset of attributes that will be fetched.
QgsFeatureRequest & setFilterExpression(const QString &expression)
Set the filter expression.
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...
const QgsDateTimeRange & temporalRange() const
Returns map canvas datetime range.
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.
virtual bool isVisibleInTemporalRange(const QgsDateTimeRange &range) const
Returns true if the layer should be visible and rendered for the specified time range.
Base class for all map layer types.
bool isInScaleRange(double scale) const
Tests whether the layer should be visible at the specified scale.
virtual QgsRectangle extent() const
Returns the extent of the layer.
virtual QgsMapLayerTemporalProperties * temporalProperties()
Returns the layer's temporal properties.
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, const QPoint &pixelPosition, QgsMapCanvas *mpMapCanvas)
Show a maptip at a given point on the map canvas.
static QString rasterMapTipPreviewText(QgsMapLayer *layer, QgsMapCanvas *mapCanvas, const QString &mapTemplate)
Returns the html that would be displayed in a maptip for a given layer.
static QString vectorMapTipPreviewText(QgsMapLayer *layer, QgsMapCanvas *mapCanvas, const QString &mapTemplate, const QString &displayExpression)
Returns the html that would be displayed in a maptip for a given layer.
QgsMapTip()
Default constructor.
void clear(QgsMapCanvas *mpMapCanvas=nullptr, int msDelay=0)
Clear the current maptip if it exists.
A class to represent a 2D point.
Represents a raster layer.
A rectangle specified with double values.
bool contains(const QgsRectangle &rect) const
Returns true when rectangle contains other rectangle.
void setYMinimum(double y)
Set the minimum y value.
void setXMinimum(double x)
Set the minimum x value.
void setYMaximum(double y)
Set the maximum y value.
QgsPointXY center() const
Returns the center point of the rectangle.
void setXMaximum(double x)
Set the maximum x 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:
bool isTemporal() const
Returns true if the object's temporal range is enabled, and the object will be filtered when renderin...
Represents a vector layer which manages a vector based data sets.
long long featureCount(const QString &legendKey) const
Number of features rendered with specified legend key.
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.
QgsFeatureRenderer * renderer()
Returns the feature renderer used for rendering the features in the layer in 2D map views.
QString displayExpression
The QgsWebView class is a collection of stubs to mimic the API of QWebView on systems where the real ...
#define QgsDebugMsgLevel(str, level)