Work on recent item - todo sort by use, test filter, update on change

python/gui/auto_generated/processing/qgsprocessingtoolboxmodel.sip.in

@@ -358,6 +358,9 @@ A sort/filter proxy model for providers and algorithms shown within the Processi
 which automatically sorts the toolbox in a logical fashion and supports filtering
 the results.
 
+If \recentLog is specified then it will be used to create a "Recently used" top
+level group containing recently used algorithms.
+
 .. versionadded:: 3.2
 %End
 
@@ -374,7 +377,9 @@ the results.
     typedef QFlags<QgsProcessingToolboxProxyModel::Filter> Filters;
 
 
-    explicit QgsProcessingToolboxProxyModel( QObject *parent /TransferThis/ = 0, QgsProcessingRegistry *registry = 0 );
+    explicit QgsProcessingToolboxProxyModel( QObject *parent /TransferThis/ = 0,
+        QgsProcessingRegistry *registry = 0,
+        QgsProcessingRecentAlgorithmLog *recentLog = 0 );
 %Docstring
 Constructor for QgsProcessingToolboxProxyModel, with the given ``parent`` object.
 

src/gui/processing/qgsprocessingtoolboxmodel.cpp

@@ -16,6 +16,7 @@
 #include "qgsprocessingtoolboxmodel.h"
 #include "qgsapplication.h"
 #include "qgsprocessingregistry.h"
+#include "qgsprocessingrecentalgorithmlog.h"
 #include <functional>
 
 #ifdef ENABLE_MODELTEST
@@ -128,7 +129,19 @@ void QgsProcessingToolboxModel::rebuild()
 
   if ( mRecentLog )
   {
-    mRootNode->addChildNode( new QgsProcessingToolboxModelRecentNode() );
+    std::unique_ptr< QgsProcessingToolboxModelRecentNode > recentNode = qgis::make_unique< QgsProcessingToolboxModelRecentNode >();
+    QgsProcessingToolboxModelRecentNode *parentNode = recentNode.get();
+    mRootNode->addChildNode( recentNode.release() );
+    const QStringList recentAlgIds = mRecentLog->recentAlgorithmIds();
+    for ( const QString &id : recentAlgIds )
+    {
+      const QgsProcessingAlgorithm *algorithm = mRegistry->algorithmById( id );
+      if ( algorithm )
+      {
+        std::unique_ptr< QgsProcessingToolboxModelAlgorithmNode > algorithmNode = qgis::make_unique< QgsProcessingToolboxModelAlgorithmNode >( algorithm, mRegistry );
+        parentNode->addChildNode( algorithmNode.release() );
+      }
+    }
   }
 
   const QList< QgsProcessingProvider * > providers = mRegistry->providers();
@@ -551,9 +564,10 @@ QModelIndex QgsProcessingToolboxModel::indexOfParentTreeNode( QgsProcessingToolb
 // QgsProcessingToolboxProxyModel
 //
 
-QgsProcessingToolboxProxyModel::QgsProcessingToolboxProxyModel( QObject *parent, QgsProcessingRegistry *registry )
+QgsProcessingToolboxProxyModel::QgsProcessingToolboxProxyModel( QObject *parent, QgsProcessingRegistry *registry,
+    QgsProcessingRecentAlgorithmLog *recentLog )
   : QSortFilterProxyModel( parent )
-  , mModel( new QgsProcessingToolboxModel( parent, registry ) )
+  , mModel( new QgsProcessingToolboxModel( parent, registry, recentLog ) )
 {
   setSourceModel( mModel );
   setDynamicSortFilter( true );

src/gui/processing/qgsprocessingtoolboxmodel.h

@@ -393,6 +393,9 @@ class GUI_EXPORT QgsProcessingToolboxModel : public QAbstractItemModel
  * which automatically sorts the toolbox in a logical fashion and supports filtering
  * the results.
  *
+ * If \recentLog is specified then it will be used to create a "Recently used" top
+ * level group containing recently used algorithms.
+ *
  * \ingroup gui
  * \since QGIS 3.2
  */
@@ -418,7 +421,9 @@ class GUI_EXPORT QgsProcessingToolboxProxyModel: public QSortFilterProxyModel
      * registry attached to QgsApplication::processingRegistry() will be used
      * by the model.
      */
-    explicit QgsProcessingToolboxProxyModel( QObject *parent SIP_TRANSFERTHIS = nullptr, QgsProcessingRegistry *registry = nullptr );
+    explicit QgsProcessingToolboxProxyModel( QObject *parent SIP_TRANSFERTHIS = nullptr,
+        QgsProcessingRegistry *registry = nullptr,
+        QgsProcessingRecentAlgorithmLog *recentLog = nullptr );
 
     /**
      * Set \a filters that affect how toolbox content is filtered.