[network analysis] use QgsFeedback for progress reporting and

cancelation

doc/api_break.dox

@@ -2510,11 +2510,18 @@ QgsRendererAbstractMetadata   {#qgis_api_break_3_0_QgsRendererAbstractMetadata}
 
 - createRenderer() now expects a reference to QgsReadWriteContext as the second argument
 
+QgsGraphDirector   {#qgis_api_break_3_0_QgsGraphDirector}
+----------------
+
+- makeGraph() now uses QgsFeedback for progress reporting and cancelation
+- buildProgress() signal was removed
+- buildMessage() signal was removed
+
 QgsVectorLayerDirector   {#qgis_api_break_3_0_QgsVectorLayerDirector}
 ----------------------
 
 - QgsVectorLayerDirector() constructor now expects a reference to QgsFeatureSource as the first argument
-
+- makeGraph() now uses QgsFeedback for progress reporting and cancelation
 
 Processing        {#qgis_api_break_3_0_Processing}
 ----------

python/analysis/network/qgsgraphdirector.sip

@@ -31,29 +31,21 @@ class QgsGraphDirector : QObject
     else
       sipType = NULL;
 %End
-  signals:
-    void buildProgress( int, int ) const;
-%Docstring
-Emitted to report graph building progress
-%End
-    void buildMessage( const QString & ) const;
-%Docstring
-Emitted to report information about graph building
-%End
-
   public:
 
     virtual ~QgsGraphDirector();
 
     virtual void makeGraph( QgsGraphBuilderInterface *builder,
                             const QVector< QgsPointXY > &additionalPoints,
-                            QVector< QgsPointXY > &snappedPoints /Out/ ) const;
+                            QVector< QgsPointXY > &snappedPoints /Out/,
+                            QgsFeedback *feedback ) const;
 %Docstring
  Make a graph using QgsGraphBuilder
 
  \param builder the graph builder
  \param additionalPoints list of points that should be snapped to the graph
  \param snappedPoints list of snapped points
+ \param feedback feedback object for reporting progress
 .. note::
 
    if snappedPoints[i] == QgsPointXY(0.0,0.0) then snapping failed.

python/analysis/network/qgsvectorlayerdirector.sip

@@ -51,7 +51,8 @@ class QgsVectorLayerDirector : QgsGraphDirector
 
      virtual void makeGraph( QgsGraphBuilderInterface *builder,
                     const QVector< QgsPointXY > &additionalPoints,
-                    QVector< QgsPointXY> &snappedPoints /Out/ ) const;
+                    QVector< QgsPointXY> &snappedPoints /Out/,
+                    QgsFeedback *feedback ) const;
 %Docstring
  MANDATORY DIRECTOR PROPERTY DECLARATION
 %End

src/analysis/network/qgsgraphdirector.h

@@ -20,8 +20,9 @@
 #include <QVector>
 #include <QList>
 
-#include <qgis.h>
-#include <qgspoint.h>
+#include "qgis.h"
+#include "qgspoint.h"
+#include "qgsfeedback.h"
 #include "qgsnetworkstrategy.h"
 #include "qgis_analysis.h"
 
@@ -53,12 +54,6 @@ class ANALYSIS_EXPORT QgsGraphDirector : public QObject
 
     Q_OBJECT
 
-  signals:
-    //! Emitted to report graph building progress
-    void buildProgress( int, int ) const;
-    //! Emitted to report information about graph building
-    void buildMessage( const QString & ) const;
-
   public:
 
     virtual ~QgsGraphDirector() { }
@@ -69,15 +64,18 @@ class ANALYSIS_EXPORT QgsGraphDirector : public QObject
      * \param builder the graph builder
      * \param additionalPoints list of points that should be snapped to the graph
      * \param snappedPoints list of snapped points
+     * \param feedback feedback object for reporting progress
      * \note if snappedPoints[i] == QgsPointXY(0.0,0.0) then snapping failed.
      */
     virtual void makeGraph( QgsGraphBuilderInterface *builder,
                             const QVector< QgsPointXY > &additionalPoints,
-                            QVector< QgsPointXY > &snappedPoints SIP_OUT ) const
+                            QVector< QgsPointXY > &snappedPoints SIP_OUT,
+                            QgsFeedback *feedback ) const
     {
       Q_UNUSED( builder );
       Q_UNUSED( additionalPoints );
       Q_UNUSED( snappedPoints );
+      Q_UNUSED( feedback );
     }
 
     //! Add optimization strategy

src/analysis/network/qgsvectorlayerdirector.cpp

@@ -27,7 +27,7 @@
 #include "qgspoint.h"
 #include "qgsgeometry.h"
 #include "qgsdistancearea.h"
-#include 'qgswkbtypes.h"
+#include "qgswkbtypes.h"
 
 #include <QString>
 #include <QtAlgorithms>
@@ -124,7 +124,7 @@ QString QgsVectorLayerDirector::name() const
 }
 
 void QgsVectorLayerDirector::makeGraph( QgsGraphBuilderInterface *builder, const QVector< QgsPointXY > &additionalPoints,
-                                        QVector< QgsPointXY > &snappedPoints ) const
+                                        QVector< QgsPointXY > &snappedPoints, QgsFeedback *feedback ) const
 {
   int featureCount = ( int ) mSource->featureCount() * 2;
   int step = 0;
@@ -158,6 +158,11 @@ void QgsVectorLayerDirector::makeGraph( QgsGraphBuilderInterface *builder, const
   QgsFeature feature;
   while ( fit.nextFeature( feature ) )
   {
+    if ( feedback && feedback->isCanceled() )
+    {
+      return;
+    }
+
     QgsMultiPolyline mpl;
     if ( QgsWkbTypes::flatType( feature.geometry().geometry()->wkbType() ) == QgsWkbTypes::MultiLineString )
       mpl = feature.geometry().asMultiPolyline();
@@ -207,7 +212,11 @@ void QgsVectorLayerDirector::makeGraph( QgsGraphBuilderInterface *builder, const
         isFirstPoint = false;
       }
     }
-    emit buildProgress( ++step, featureCount );
+    if ( feedback )
+    {
+      feedback->setProgress( 100.0 * static_cast< double >( ++step ) / featureCount );
+    }
+
   }
   // end: tie points to graph
 
@@ -274,6 +283,11 @@ void QgsVectorLayerDirector::makeGraph( QgsGraphBuilderInterface *builder, const
   fit = mSource->getFeatures( QgsFeatureRequest().setSubsetOfAttributes( la ) );
   while ( fit.nextFeature( feature ) )
   {
+    if ( feedback && feedback->isCanceled() )
+    {
+      return;
+    }
+
     Direction directionType = mDefaultDirection;
 
     // What direction have feature?
@@ -382,6 +396,10 @@ void QgsVectorLayerDirector::makeGraph( QgsGraphBuilderInterface *builder, const
         isFirstPoint = false;
       } // for (it = pl.begin(); it != pl.end(); ++it)
     }
-    emit buildProgress( ++step, featureCount );
+    if ( feedback )
+    {
+      feedback->setProgress( 100.0 * static_cast< double >( ++step ) / featureCount );
+    }
+
   } // while( mSource->nextFeature(feature) )
 } // makeGraph( QgsGraphBuilderInterface *builder, const QVector< QgsPointXY >& additionalPoints, QVector< QgsPointXY >& tiedPoint )

src/analysis/network/qgsvectorlayerdirector.h

@@ -74,7 +74,8 @@ class ANALYSIS_EXPORT QgsVectorLayerDirector : public QgsGraphDirector
      */
     void makeGraph( QgsGraphBuilderInterface *builder,
                     const QVector< QgsPointXY > &additionalPoints,
-                    QVector< QgsPointXY> &snappedPoints SIP_OUT ) const override;
+                    QVector< QgsPointXY> &snappedPoints SIP_OUT,
+                    QgsFeedback *feedback ) const override;
 
     QString name() const override;