32#include <QQuickWindow>
33#include <QSGSimpleRectNode>
34#include <QSGSimpleTextureNode>
40class QgsElevationProfilePlotItem :
public Qgs2DPlot
48 setSize( mCanvas->boundingRect().size() );
58 setSize( mCanvas->boundingRect().size() );
59 mCachedImages.clear();
65 mCachedImages.clear();
69 bool redrawResults(
const QString &sourceId )
71 auto it = mCachedImages.find( sourceId );
72 if ( it == mCachedImages.end() )
75 mCachedImages.erase( it );
81 if ( !mPlotArea.isNull() )
86 context.
setScaleFactor( ( mCanvas->window()->screen()->physicalDotsPerInch() * mCanvas->window()->screen()->devicePixelRatio() ) / 25.4 );
100 const QStringList sourceIds = mRenderer->sourceIds();
101 for (
const QString &source : sourceIds )
104 auto it = mCachedImages.constFind( source );
105 if ( it != mCachedImages.constEnd() )
111 const float devicePixelRatio =
static_cast<float>( mCanvas->window()->screen()->devicePixelRatio() );
112 plot = QImage(
static_cast<int>( plotArea.width() * devicePixelRatio ),
static_cast<int>( plotArea.height() * devicePixelRatio ), QImage::Format_ARGB32_Premultiplied );
113 plot.setDevicePixelRatio( devicePixelRatio );
114 plot.fill( Qt::transparent );
116 QPainter plotPainter( &plot );
117 plotPainter.setRenderHint( QPainter::Antialiasing,
true );
121 const double mapUnitsPerPixel = (
xMaximum() -
xMinimum() ) / plotArea.width();
127 mCachedImages.insert( source, plot );
129 rc.
painter()->drawImage(
static_cast<int>( plotArea.left() ),
static_cast<int>( plotArea.top() ), plot );
138 QMap<QString, QImage> mCachedImages;
144 : QQuickItem( parent )
147 mDeferredRegenerationTimer =
new QTimer(
this );
148 mDeferredRegenerationTimer->setSingleShot(
true );
149 mDeferredRegenerationTimer->stop();
150 connect( mDeferredRegenerationTimer, &QTimer::timeout,
this, &QgsQuickElevationProfileCanvas::startDeferredRegeneration );
152 mDeferredRedrawTimer =
new QTimer(
this );
153 mDeferredRedrawTimer->setSingleShot(
true );
154 mDeferredRedrawTimer->stop();
155 connect( mDeferredRedrawTimer, &QTimer::timeout,
this, &QgsQuickElevationProfileCanvas::startDeferredRedraw );
157 mPlotItem =
new QgsElevationProfilePlotItem(
this );
159 setTransformOrigin( QQuickItem::TopLeft );
160 setFlags( QQuickItem::ItemHasContents );
167 mPlotItem->setRenderer(
nullptr );
168 mCurrentJob->deleteLater();
169 mCurrentJob =
nullptr;
177 mPlotItem->setRenderer(
nullptr );
180 mCurrentJob->deleteLater();
181 mCurrentJob =
nullptr;
185void QgsQuickElevationProfileCanvas::setupLayerConnections(
QgsMapLayer *layer,
bool isDisconnect )
203 switch ( layer->
type() )
238 return mCurrentJob && mCurrentJob->
isActive();
248 mPlotItem->setRenderer(
nullptr );
250 mCurrentJob->deleteLater();
251 mCurrentJob =
nullptr;
265 const QList<QgsMapLayer *> layersToGenerate =
layers();
266 QList<QgsAbstractProfileSource *> sources;
267 sources.reserve( layersToGenerate.size() );
271 sources.append( source );
278 generationContext.
setDpi( window()->screen()->physicalDotsPerInch() * window()->screen()->devicePixelRatio() );
283 mPlotItem->updatePlot();
285 mPlotItem->setRenderer( mCurrentJob );
291void QgsQuickElevationProfileCanvas::generationFinished()
298 if ( mZoomFullWhenJobFinished )
300 mZoomFullWhenJobFinished =
false;
304 QRectF rect = boundingRect();
305 const float devicePixelRatio =
static_cast<float>( window()->screen()->devicePixelRatio() );
306 mImage = QImage(
static_cast<int>( rect.width() * devicePixelRatio ),
static_cast<int>( rect.height() * devicePixelRatio ), QImage::Format_ARGB32_Premultiplied );
307 mImage.setDevicePixelRatio( devicePixelRatio );
308 mImage.fill( Qt::transparent );
310 QPainter imagePainter( &mImage );
311 imagePainter.setRenderHint( QPainter::Antialiasing,
true );
318 mPlotItem->calculateOptimisedIntervals( rc );
319 mPlotItem->render( rc );
325 if ( mForceRegenerationAfterCurrentJobCompletes )
327 mForceRegenerationAfterCurrentJobCompletes =
false;
329 scheduleDeferredRegeneration();
337void QgsQuickElevationProfileCanvas::onLayerProfileGenerationPropertyChanged()
340 if ( !mCurrentJob || mCurrentJob->
isActive() )
347 if (
QgsMapLayer *layer = qobject_cast<QgsMapLayer *>( properties->parent() ) )
352 scheduleDeferredRegeneration();
357void QgsQuickElevationProfileCanvas::onLayerProfileRendererPropertyChanged()
360 if ( !mCurrentJob || mCurrentJob->
isActive() )
367 if (
QgsMapLayer *layer = qobject_cast<QgsMapLayer *>( properties->parent() ) )
373 if ( mPlotItem->redrawResults( layer->
id() ) )
374 scheduleDeferredRedraw();
378void QgsQuickElevationProfileCanvas::regenerateResultsForLayer()
383 if (
QgsMapLayer *layer = qobject_cast<QgsMapLayer *>( sender() ) )
388 scheduleDeferredRegeneration();
393void QgsQuickElevationProfileCanvas::scheduleDeferredRegeneration()
395 if ( !mDeferredRegenerationScheduled )
397 mDeferredRegenerationTimer->start( 1 );
398 mDeferredRegenerationScheduled =
true;
402void QgsQuickElevationProfileCanvas::scheduleDeferredRedraw()
404 if ( !mDeferredRedrawScheduled )
406 mDeferredRedrawTimer->start( 1 );
407 mDeferredRedrawScheduled =
true;
411void QgsQuickElevationProfileCanvas::startDeferredRegeneration()
413 if ( mCurrentJob && !mCurrentJob->
isActive() )
418 else if ( mCurrentJob )
420 mForceRegenerationAfterCurrentJobCompletes =
true;
423 mDeferredRegenerationScheduled =
false;
426void QgsQuickElevationProfileCanvas::startDeferredRedraw()
429 mDeferredRedrawScheduled =
false;
432void QgsQuickElevationProfileCanvas::refineResults()
437 context.
setDpi( window()->screen()->physicalDotsPerInch() * window()->screen()->devicePixelRatio() );
438 const double plotDistanceRange = mPlotItem->xMaximum() - mPlotItem->xMinimum();
439 const double plotElevationRange = mPlotItem->yMaximum() - mPlotItem->yMinimum();
440 const double plotDistanceUnitsPerPixel = plotDistanceRange / mPlotItem->plotArea().width();
444 const double targetMaxErrorInMapUnits = MAX_ERROR_PIXELS * plotDistanceUnitsPerPixel;
445 const double factor = std::pow( 10.0, 1 - std::ceil( std::log10( std::fabs( targetMaxErrorInMapUnits ) ) ) );
446 const double roundedErrorInMapUnits = std::floor( targetMaxErrorInMapUnits * factor ) / factor;
454 mPlotItem->xMaximum() + plotDistanceRange * 0.05 ) );
457 mPlotItem->yMaximum() + plotElevationRange * 0.05 ) );
460 scheduleDeferredRegeneration();
485 if ( mProfileCurve.
equals( curve ) )
505 for (
QgsMapLayer *layer : std::as_const( mLayers ) )
507 setupLayerConnections( layer,
true );
529 auto filteredList = sortedLayers;
530 filteredList.erase( std::remove_if( filteredList.begin(), filteredList.end(),
533 return !layer || !layer->isValid() || !layer->elevationProperties() || !layer->elevationProperties()->showByDefaultInElevationProfilePlots();
535 filteredList.end() );
537 mLayers = _qgis_listRawToQPointer( filteredList );
538 for (
QgsMapLayer *layer : std::as_const( mLayers ) )
540 setupLayerConnections( layer,
false );
546 return _qgis_listQPointerToRaw( mLayers );
549#if QT_VERSION < QT_VERSION_CHECK( 6, 0, 0 )
550void QgsQuickElevationProfileCanvas::geometryChanged(
const QRectF &newGeometry,
const QRectF &oldGeometry )
552 QQuickItem::geometryChanged( newGeometry, oldGeometry );
556 QQuickItem::geometryChange( newGeometry, oldGeometry );
558 mPlotItem->updateRect();
572 QSGNode *newNode =
nullptr;
573 if ( !mImage.isNull() )
575 QSGSimpleTextureNode *node =
static_cast<QSGSimpleTextureNode *
>( oldNode );
578 node =
new QSGSimpleTextureNode();
579 QSGTexture *texture = window()->createTextureFromImage( mImage );
580 node->setTexture( texture );
581 node->setOwnsTexture(
true );
584 QRectF rect( boundingRect() );
585 QSizeF size = mImage.size();
586 if ( !size.isEmpty() )
587 size /= window()->screen()->devicePixelRatio();
590 if ( !rect.isEmpty() && !size.isEmpty() && !
qgsDoubleNear( rect.width() / rect.height(), ( size.width() ) /
static_cast<double>( size.height() ), 3 ) )
594 rect.setHeight( rect.width() / size.width() * size.height() );
598 rect.setWidth( rect.height() / size.height() * size.width() );
601 node->setRect( rect );
606 QSGSimpleRectNode *node =
static_cast<QSGSimpleRectNode *
>( oldNode );
609 node =
new QSGSimpleRectNode();
610 node->setColor( Qt::transparent );
612 node->setRect( boundingRect() );
629 mPlotItem->setYMinimum( 0 );
630 mPlotItem->setYMaximum( 10 );
635 mPlotItem->setYMinimum( zRange.
lower() - 5 );
636 mPlotItem->setYMaximum( zRange.
lower() + 5 );
641 const double margin = ( zRange.
upper() - zRange.
lower() ) * 0.05;
642 mPlotItem->setYMinimum( zRange.
lower() - margin );
643 mPlotItem->setYMaximum( zRange.
upper() + margin );
646 const double profileLength = mProfileCurve.
get()->
length();
647 mPlotItem->setXMinimum( 0 );
649 mPlotItem->setXMaximum( profileLength * 1.02 );
660 double xLength = mProfileCurve.
get()->
length();
661 double yLength = zRange.
upper() - zRange.
lower();
666 mPlotItem->setYMinimum( 0 );
667 mPlotItem->setYMaximum( 10 );
669 mPlotItem->setXMinimum( 0 );
671 mPlotItem->setXMaximum( xLength * 1.02 );
675 double yInRatioLength = xLength * mPlotItem->size().height() / mPlotItem->size().width();
676 double xInRatioLength = yLength * mPlotItem->size().width() / mPlotItem->size().height();
677 if ( yInRatioLength > yLength )
679 qDebug() <<
"yInRatioLength";
680 mPlotItem->setYMinimum( zRange.
lower() - ( yInRatioLength / 2 ) );
681 qDebug() << mPlotItem->yMinimum();
682 mPlotItem->setYMaximum( zRange.
upper() + ( yInRatioLength / 2 ) );
683 qDebug() << mPlotItem->yMaximum();
685 mPlotItem->setXMinimum( 0 );
687 mPlotItem->setXMaximum( xLength * 1.02 );
691 qDebug() <<
"xInRatioLength";
693 const double margin = yLength * 0.05;
694 mPlotItem->setYMinimum( zRange.
lower() - margin );
695 qDebug() << mPlotItem->yMinimum();
696 mPlotItem->setYMaximum( zRange.
upper() + margin );
697 qDebug() << mPlotItem->yMaximum();
699 mPlotItem->setXMinimum( 0 - ( xInRatioLength / 2 ) );
700 mPlotItem->setXMaximum( xLength + ( xInRatioLength / 2 ) );
709 mPlotItem->setYMinimum( minimumElevation );
710 mPlotItem->setYMaximum( maximumElevation );
711 mPlotItem->setXMinimum( minimumDistance );
712 mPlotItem->setXMaximum( maximumDistance );
718 return QgsDoubleRange( mPlotItem->xMinimum(), mPlotItem->xMaximum() );
723 return QgsDoubleRange( mPlotItem->yMinimum(), mPlotItem->yMaximum() );
731 mPlotItem->setRenderer(
nullptr );
733 mCurrentJob->deleteLater();
734 mCurrentJob =
nullptr;
737 mZoomFullWhenJobFinished =
true;
@ Group
Composite group layer. Added in QGIS 3.24.
@ Plugin
Plugin based layer.
@ TiledScene
Tiled scene layer. Added in QGIS 3.34.
@ Annotation
Contains freeform, georeferenced annotations. Added in QGIS 3.16.
@ VectorTile
Vector tile layer. Added in QGIS 3.14.
@ Mesh
Mesh layer. Added in QGIS 3.2.
@ PointCloud
Point cloud layer. Added in QGIS 3.18.
Base class for 2-dimensional plot/chart/graphs.
void calculateOptimisedIntervals(QgsRenderContext &context)
Automatically sets the grid and label intervals to optimal values for display in the given render con...
double yMaximum() const
Returns the maximum value of the y axis.
void setSize(QSizeF size)
Sets the overall size of the plot (including titles and over components which sit outside the plot ar...
double xMaximum() const
Returns the maximum value of the x axis.
void setYMaximum(double maximum)
Sets the maximum value of the y axis.
double xMinimum() const
Returns the minimum value of the x axis.
double yMinimum() const
Returns the minimum value of the y axis.
QRectF interiorPlotArea(QgsRenderContext &context) const
Returns the area of the plot which corresponds to the actual plot content (excluding all titles and o...
void setYMinimum(double minimum)
Sets the minimum value of the y axis.
virtual void renderContent(QgsRenderContext &context, const QRectF &plotArea)
Renders the plot content.
virtual double length() const
Returns the planar, 2-dimensional length of the geometry.
virtual QgsAbstractGeometry * clone() const =0
Clones the geometry by performing a deep copy.
Interface for classes which can generate elevation profiles.
virtual QgsAbstractTerrainProvider * clone() const =0
Creates a clone of the provider and returns the new object.
This class represents a coordinate reference system (CRS).
bool isValid() const
Returns whether this CRS is correctly initialized and usable.
Abstract base class for curved geometry type.
QgsRange which stores a range of double values.
static QgsExpressionContextScope * projectScope(const QgsProject *project)
Creates a new scope which contains variables and functions relating to a QGIS project.
static QgsExpressionContextScope * globalScope()
Creates a new scope which contains variables and functions relating to the global QGIS context.
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.
A geometry is the spatial representation of a feature.
QgsAbstractGeometry * get()
Returns a modifiable (non-const) reference to the underlying abstract geometry primitive.
bool equals(const QgsGeometry &geometry) const
Test if this geometry is exactly equal to another geometry.
bool isEmpty() const
Returns true if the geometry is empty (eg a linestring with no vertices, or a collection with no geom...
Base class for storage of map layer elevation properties.
void profileGenerationPropertyChanged()
Emitted when any of the elevation properties which relate solely to generation of elevation profiles ...
void profileRenderingPropertyChanged()
Emitted when any of the elevation properties which relate solely to presentation of elevation results...
static QList< QgsMapLayer * > sortLayersByType(const QList< QgsMapLayer * > &layers, const QList< Qgis::LayerType > &order)
Sorts a list of map layers by their layer type, respecting the order of types specified.
Base class for all map layer types.
void dataChanged()
Data of layer changed.
virtual QgsMapLayerElevationProperties * elevationProperties()
Returns the layer's elevation properties.
Perform transforms between map coordinates and device coordinates.
Encapsulates the context in which an elevation profile is to be generated.
double maximumErrorMapUnits() const
Returns the maximum allowed error in the generated result, in profile curve map units.
void setDpi(double dpi)
Sets the dpi (dots per inch) for the profie, to be used in size conversions.
void setMaximumErrorMapUnits(double error)
Sets the maximum allowed error in the generated result, in profile curve map units.
void setDistanceRange(const QgsDoubleRange &range)
Sets the range of distances to include in the generation.
void setElevationRange(const QgsDoubleRange &range)
Sets the range of elevations to include in the generation.
void setMapUnitsPerDistancePixel(double units)
Sets the number of map units per pixel in the distance dimension.
Generates and renders elevation profile plots.
void regenerateInvalidatedResults()
Starts a background regeneration of any invalidated results and immediately returns.
void invalidateAllRefinableSources()
Invalidates previous results from all refinable sources.
void cancelGeneration()
Stop the generation job - does not return until the job has terminated.
void startGeneration()
Start the generation job and immediately return.
QgsDoubleRange zRange() const
Returns the limits of the retrieved elevation values.
bool isActive() const
Returns true if the generation job is currently running in background.
bool invalidateResults(QgsAbstractProfileSource *source)
Invalidates the profile results from the source with matching ID.
void replaceSource(QgsAbstractProfileSource *source)
Replaces the existing source with matching ID.
void setContext(const QgsProfileGenerationContext &context)
Sets the context in which the profile generation will occur.
void generationFinished()
Emitted when the profile generation is finished (or canceled).
Encapsulates properties and constraints relating to fetching elevation profiles from different source...
QgsProfileRequest & setExpressionContext(const QgsExpressionContext &context)
Sets the expression context used to evaluate expressions.
QgsProfileRequest & setTransformContext(const QgsCoordinateTransformContext &context)
Sets the transform context, for use when transforming coordinates from a source to the request's crs(...
QgsProfileRequest & setTerrainProvider(QgsAbstractTerrainProvider *provider)
Sets the terrain provider.
QgsProfileRequest & setTolerance(double tolerance)
Sets the tolerance of the request (in crs() units).
QgsProfileRequest & setCrs(const QgsCoordinateReferenceSystem &crs)
Sets the desired Coordinate Reference System (crs) for the profile.
QgsAbstractTerrainProvider * terrainProvider()
Returns the project's terrain provider.
Encapsulates a QGIS project, including sets of map layers and their styles, layouts,...
static QgsProject * instance()
Returns the QgsProject singleton instance.
const QgsProjectElevationProperties * elevationProperties() const
Returns the project's elevation properties, which contains the project's elevation related settings.
QVector< T > layers() const
Returns a list of registered map layers with a specified layer type.
QgsCoordinateTransformContext transformContext
This class implements a visual Qt Quick Item that does elevation profile rendering according to the c...
void geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry) override
void cancelJobs()
Cancel any rendering job in a blocking way.
void setTolerance(double tolerance)
Sets the profile tolerance (in crs() units).
~QgsQuickElevationProfileCanvas()
QgsQuickElevationProfileCanvas(QQuickItem *parent=nullptr)
Constructor for QgsElevationProfileCanvas, with the specified parent widget.
void activeJobCountChanged(int count)
Emitted when the number of active background jobs changes.
void setProfileCurve(QgsGeometry curve)
Sets the profile curve geometry.
void crsChanged()
Emitted when the CRS linked to the profile curve geometry changes.
void setVisiblePlotRange(double minimumDistance, double maximumDistance, double minimumElevation, double maximumElevation)
Sets the visible area of the plot.
QgsCoordinateReferenceSystem crs
bool isRendering
The isRendering property is set to true while a rendering job is pending for this elevation profile c...
void setProject(QgsProject *project)
Sets the project associated with the profile.
void profileCurveChanged()
Emitted when the profile curve geometry changes.
QList< QgsMapLayer * > layers() const
Returns the list of layers included in the profile.
QgsDoubleRange visibleDistanceRange() const
Returns the distance range currently visible in the plot.
Q_INVOKABLE void refresh()
Triggers a complete regeneration of the profile, causing the profile extraction to perform in the bac...
QSGNode * updatePaintNode(QSGNode *oldNode, QQuickItem::UpdatePaintNodeData *) override
QgsDoubleRange visibleElevationRange() const
Returns the elevation range currently visible in the plot.
Q_INVOKABLE void populateLayersFromProject()
Populates the current profile with elevation-enabled layers from the associated project.
void setCrs(const QgsCoordinateReferenceSystem &crs)
Sets the crs associated with the map coordinates.
Q_INVOKABLE void clear()
Clears the current profile.
void projectChanged()
Emitted when the associated project changes.
void toleranceChanged()
Emitted when the tolerance changes.
Q_INVOKABLE void zoomFull()
Zooms to the full extent of the profile.
void isRenderingChanged()
The isRendering property is set to true while a rendering job is pending for this elevation profile c...
Q_INVOKABLE void zoomFullInRatio()
Zooms to the full extent of the profile while maintaining X and Y axes' length ratio.
T lower() const
Returns the lower bound of the range.
T upper() const
Returns the upper bound of the range.
Contains information about the context of a rendering operation.
void setScaleFactor(double factor)
Sets the scaling factor for the render to convert painter units to physical sizes.
void setDevicePixelRatio(float ratio)
Sets the device pixel ratio.
QPainter * painter()
Returns the destination QPainter for the render operation.
QgsExpressionContext & expressionContext()
Gets the expression context.
void setMapToPixel(const QgsMapToPixel &mtp)
Sets the context's map to pixel transform, which transforms between map coordinates and device coordi...
static QgsRenderContext fromQPainter(QPainter *painter)
Creates a default render context given a pixel based QPainter destination.
Represents a vector layer which manages a vector based data sets.
void attributeValueChanged(QgsFeatureId fid, int idx, const QVariant &value)
Emitted whenever an attribute value change is done in the edit buffer.
void featureAdded(QgsFeatureId fid)
Emitted when a new feature has been added to the layer.
void featureDeleted(QgsFeatureId fid)
Emitted when a feature has been deleted.
void geometryChanged(QgsFeatureId fid, const QgsGeometry &geometry)
Emitted whenever a geometry change is done in the edit buffer.
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)
const QgsCoordinateReferenceSystem & crs