23#include <QtConcurrentMap>
24#include <QtConcurrentRun>
34 if ( std::unique_ptr< QgsAbstractProfileGenerator > generator{ source->createProfileGenerator( mRequest ) } )
35 mGenerators.emplace_back( std::move( generator ) );
41 : mGenerators( std::move( generators ) )
57 res.reserve( mGenerators.size() );
58 for (
const auto &it : mGenerators )
60 res.append( it->sourceId() );
72 Q_ASSERT( mJobs.empty() );
74 mJobs.reserve( mGenerators.size() );
75 for (
const auto &it : mGenerators )
77 std::unique_ptr< ProfileJob > job = std::make_unique< ProfileJob >();
78 job->generator = it.get();
79 job->context = mContext;
80 mJobs.emplace_back( std::move( job ) );
83 connect( &mFutureWatcher, &QFutureWatcher<void>::finished,
this, &QgsProfilePlotRenderer::onGeneratingFinished );
85 mFuture = QtConcurrent::map( mJobs, generateProfileStatic );
86 mFutureWatcher.setFuture( mFuture );
96 Q_ASSERT( mJobs.empty() );
97 mJobs.reserve( mGenerators.size() );
99 for (
const auto &it : mGenerators )
101 std::unique_ptr< ProfileJob > job = std::make_unique< ProfileJob >();
102 job->generator = it.get();
103 job->context = mContext;
104 it.get()->generateProfile( job->context );
105 job->results.reset( job->generator->takeResults() );
106 job->complete =
true;
107 job->invalidatedResults.reset();
108 mJobs.emplace_back( std::move( job ) );
119 disconnect( &mFutureWatcher, &QFutureWatcher<void>::finished,
this, &QgsProfilePlotRenderer::onGeneratingFinished );
121 for (
const auto &job : mJobs )
123 if ( job->generator )
125 if (
QgsFeedback *feedback = job->generator->feedback() )
132 mFutureWatcher.waitForFinished();
134 onGeneratingFinished();
142 for (
const auto &job : mJobs )
144 if ( job->generator )
146 if (
QgsFeedback *feedback = job->generator->feedback() )
159 disconnect( &mFutureWatcher, &QFutureWatcher<void>::finished,
this, &QgsProfilePlotRenderer::onGeneratingFinished );
160 mFutureWatcher.waitForFinished();
162 onGeneratingFinished();
167 return mStatus != Idle;
172 if ( mContext == context )
180 for (
auto &job : mJobs )
186 if ( !jobNeedsRegeneration )
190 job->context = mContext;
191 if ( job->results && job->complete )
192 job->invalidatedResults = std::move( job->results );
193 job->results.reset();
194 job->complete =
false;
201 for (
auto &job : mJobs )
207 if ( !jobNeedsRegeneration )
211 job->context = mContext;
212 if ( job->results && job->complete )
213 job->invalidatedResults = std::move( job->results );
214 job->results.reset();
215 job->complete =
false;
222 replaceSourceInternal( source,
false );
227 return replaceSourceInternal( source,
true );
239 QString sourceId = generator->
sourceId();
241 for (
auto &job : mJobs )
243 if ( job->generator && job->generator->sourceId() == sourceId )
247 if ( clearPreviousResults )
249 job->results.reset();
250 job->complete =
false;
252 else if ( job->results )
254 job->results->copyPropertiesFromGenerator( generator.get() );
256 job->generator = generator.get();
259 for (
auto it = mGenerators.begin(); it != mGenerators.end(); )
261 if ( ( *it )->sourceId() == sourceId )
262 it = mGenerators.erase( it );
266 mGenerators.emplace_back( std::move( generator ) );
277 mStatus = Generating;
279 connect( &mFutureWatcher, &QFutureWatcher<void>::finished,
this, &QgsProfilePlotRenderer::onGeneratingFinished );
281 mFuture = QtConcurrent::map( mJobs, generateProfileStatic );
282 mFutureWatcher.setFuture( mFuture );
287 double min = std::numeric_limits< double >::max();
288 double max = std::numeric_limits< double >::lowest();
289 for (
const auto &job : mJobs )
291 if ( job->complete && job->results )
294 min = std::min( min, jobRange.
lower() );
295 max = std::max( max, jobRange.
upper() );
303 QImage res( width, height, QImage::Format_ARGB32_Premultiplied );
304 res.setDotsPerMeterX( 96 / 25.4 * 1000 );
305 res.setDotsPerMeterY( 96 / 25.4 * 1000 );
306 res.fill( Qt::transparent );
314 const double mapUnitsPerPixel = ( distanceMax - distanceMin ) / width;
317 render( context, width, height, distanceMin, distanceMax, zMin, zMax, sourceId );
325 QPainter *painter = context.
painter();
331 QTransform transform;
332 transform.translate( 0, height );
333 transform.scale( width / ( distanceMax - distanceMin ), -height / ( zMax - zMin ) );
334 transform.translate( -distanceMin, -zMin );
340 for (
auto &job : mJobs )
342 if ( ( sourceId.isEmpty() || job->generator->sourceId() == sourceId ) )
345 if ( job->complete && job->results )
347 job->results->renderResults( profileRenderContext );
349 else if ( !job->complete && job->invalidatedResults )
352 job->invalidatedResults->renderResults( profileRenderContext );
363 return bestSnapResult;
365 double bestSnapDistance = std::numeric_limits< double >::max();
367 for (
const auto &job : mJobs )
370 if ( job->complete && job->results )
378 if ( snapDistance < bestSnapDistance )
380 bestSnapDistance = snapDistance;
381 bestSnapResult = jobSnapResult;
388 return bestSnapResult;
393 QVector<QgsProfileIdentifyResults> res;
397 for (
const auto &job : mJobs )
400 if ( job->complete && job->results )
402 res.append( job->results->identify( point, context ) );
412 QVector<QgsProfileIdentifyResults> res;
416 for (
const auto &job : mJobs )
419 if ( job->complete && job->results )
421 res.append( job->results->identify( distanceRange, elevationRange, context ) );
431 QVector<QgsAbstractProfileResults::Feature > res;
432 for (
const auto &job : mJobs )
438 if ( job->complete && job->results )
440 res.append( job->results->asFeatures( type, feedback ) );
447void QgsProfilePlotRenderer::onGeneratingFinished()
453void QgsProfilePlotRenderer::generateProfileStatic( std::unique_ptr< ProfileJob > &job )
458 Q_ASSERT( job->generator );
460 job->generator->generateProfile( job->context );
462 job->results.reset( job->generator->takeResults() );
463 job->complete =
true;
464 job->invalidatedResults.reset();
@ RespectsMaximumErrorMapUnit
Generated profile respects the QgsProfileGenerationContext::maximumErrorMapUnits() property.
@ RespectsElevationRange
Generated profile respects the QgsProfileGenerationContext::elevationRange() property.
@ RespectsDistanceRange
Generated profile respects the QgsProfileGenerationContext::distanceRange() property.
@ Antialiasing
Use antialiasing while drawing.
ProfileExportType
Types of export for elevation profiles.
virtual QString sourceId() const =0
Returns a unique identifier representing the source of the profile.
Interface for classes which can generate elevation profiles.
virtual QgsAbstractProfileGenerator * createProfileGenerator(const QgsProfileRequest &request)=0
Given a profile request, returns a new profile generator ready for generating elevation profiles.
QgsRange which stores a range of double values.
Base class for feedback objects to be used for cancellation of something running in a worker thread.
bool isCanceled() const
Tells whether the operation has been canceled already.
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.
QgsDoubleRange elevationRange() const
Returns the range of elevations to include in the generation.
QgsDoubleRange distanceRange() const
Returns the range of distances to include in the generation.
Encapsulates the context of identifying profile results.
QgsProfileSnapResult snapPoint(const QgsProfilePoint &point, const QgsProfileSnapContext &context)
Snap a point to the results.
void render(QgsRenderContext &context, double width, double height, double distanceMin, double distanceMax, double zMin, double zMax, const QString &sourceId=QString())
Renders a portion of the profile using the specified render context.
void regenerateInvalidatedResults()
Starts a background regeneration of any invalidated results and immediately returns.
QVector< QgsAbstractProfileResults::Feature > asFeatures(Qgis::ProfileExportType type, QgsFeedback *feedback=nullptr)
Exports the profile results as a set of features.
QImage renderToImage(int width, int height, double distanceMin, double distanceMax, double zMin, double zMax, const QString &sourceId=QString(), double devicePixelRatio=1.0)
Renders a portion of the profile to an image with the given width and height.
void cancelGenerationWithoutBlocking()
Triggers cancellation of the generation job without blocking.
void invalidateAllRefinableSources()
Invalidates previous results from all refinable sources.
void cancelGeneration()
Stop the generation job - does not return until the job has terminated.
QgsProfilePlotRenderer(const QList< QgsAbstractProfileSource * > &sources, const QgsProfileRequest &request)
Constructor for QgsProfilePlotRenderer, using the provided list of profile sources to generate the re...
void generateSynchronously()
Generate the profile results synchronously in this thread.
void startGeneration()
Start the generation job and immediately return.
QgsDoubleRange zRange() const
Returns the limits of the retrieved elevation values.
QVector< QgsProfileIdentifyResults > identify(const QgsProfilePoint &point, const QgsProfileIdentifyContext &context)
Identify results visible at the specified profile point.
void waitForFinished()
Block until the current job has finished.
~QgsProfilePlotRenderer() override
bool isActive() const
Returns true if the generation job is currently running in background.
QStringList sourceIds() const
Returns the ordered list of source IDs for the sources used by the renderer.
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 a point on a distance-elevation profile.
double elevation() const
Returns the elevation of the point.
double distance() const
Returns the distance of the point.
Abstract base class for storage of elevation profiles.
void setWorldTransform(const QTransform &transform)
Sets the transform from world coordinates to painter coordinates.
void setDistanceRange(const QgsDoubleRange &range)
Sets the range of distances to include in the render.
void setElevationRange(const QgsDoubleRange &range)
Sets the range of elevations to include in the render.
Encapsulates properties and constraints relating to fetching elevation profiles from different source...
QgsCurve * profileCurve() const
Returns the cross section profile curve, which represents the line along which the profile should be ...
Encapsulates the context of snapping a profile point.
double displayRatioElevationVsDistance
Display ratio of elevation vs distance units.
Encapsulates results of snapping a profile point.
bool isValid() const
Returns true if the result is a valid point.
QgsProfilePoint snappedPoint
Snapped point.
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 setDevicePixelRatio(float ratio)
Sets the device pixel ratio.
QPainter * painter()
Returns the destination QPainter for the render operation.
void setPainterFlagsUsingContext(QPainter *painter=nullptr) const
Sets relevant flags on a destination painter, using the flags and settings currently defined for the ...
void setFlag(Qgis::RenderContextFlag flag, bool on=true)
Enable or disable a particular flag (other flags are not affected)
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.
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)