Start on history item

images/images.qrc

@@ -695,6 +695,7 @@
         <file>themes/default/mActionIdentifyByRadius.svg</file>
         <file>themes/default/mActionIdentifyByRectangle.svg</file>
         <file>themes/default/mIndicatorEmbedded.svg</file>
+        <file>themes/default/mIconHistory.svg</file>
     </qresource>
     <qresource prefix="/images/tips">
         <file alias="symbol_levels.png">qgis_tips/symbol_levels.png</file>

python/gui/auto_additions/qgsprocessingtoolboxmodel.py

@@ -0,0 +1,3 @@
+# The following has been generated automatically from src/gui/processing/qgsprocessingtoolboxmodel.h
+QgsProcessingToolboxProxyModel.Filters.baseClass = QgsProcessingToolboxProxyModel
+Filters = QgsProcessingToolboxProxyModel  # dirty hack since SIP seems to introduce the flags in module

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

@@ -36,6 +36,8 @@ Abstract base class for nodes contained within a QgsProcessingToolboxModel.
         sipType = sipType_QgsProcessingToolboxModelGroupNode;
       else if ( node->nodeType() == QgsProcessingToolboxModelNode::NodeAlgorithm )
         sipType = sipType_QgsProcessingToolboxModelAlgorithmNode;
+      else if ( node->nodeType() == QgsProcessingToolboxModelNode::NodeRecent )
+        sipType = sipType_QgsProcessingToolboxModelRecentNode;
     }
     else
       sipType = 0;
@@ -47,6 +49,7 @@ Abstract base class for nodes contained within a QgsProcessingToolboxModel.
       NodeProvider,
       NodeGroup,
       NodeAlgorithm,
+      NodeRecent,
     };
 
     ~QgsProcessingToolboxModelNode();
@@ -93,6 +96,32 @@ Deletes all child nodes from this node.
 
 };
 
+class QgsProcessingToolboxModelRecentNode : QgsProcessingToolboxModelNode
+{
+%Docstring
+Processing toolbox model node corresponding to the recent algorithms group
+
+.. versionadded:: 3.2
+
+.. warning::
+
+   Not part of stable API and may change in future QGIS releases.
+%End
+
+%TypeHeaderCode
+#include "qgsprocessingtoolboxmodel.h"
+%End
+  public:
+
+    QgsProcessingToolboxModelRecentNode();
+%Docstring
+Constructor for QgsProcessingToolboxModelRecentNode.
+%End
+
+    virtual NodeType nodeType() const;
+
+};
+
 class QgsProcessingToolboxModelProviderNode : QgsProcessingToolboxModelNode
 {
 %Docstring

python/plugins/processing/ProcessingPlugin.py

@@ -205,7 +205,7 @@ class ProcessingPlugin:
         self.menu.addAction(self.modelerAction)
 
         self.historyAction = QAction(
-            QIcon(os.path.join(pluginPath, 'images', 'history.svg')),
+            QgsApplication.getThemeIcon("/mIconHistory.svg"),
             QCoreApplication.translate('ProcessingPlugin', '&History…'), self.iface.mainWindow())
         self.historyAction.setObjectName('historyAction')
         self.historyAction.triggered.connect(self.openHistory)

src/gui/processing/qgsprocessingtoolboxmodel.cpp

@@ -124,6 +124,8 @@ void QgsProcessingToolboxModel::rebuild()
 
   mRootNode->deleteChildren();
 
+  mRootNode->addChildNode( new QgsProcessingToolboxModelRecentNode() );
+
   const QList< QgsProcessingProvider * > providers = mRegistry->providers();
   for ( QgsProcessingProvider *provider : providers )
   {
@@ -276,6 +278,10 @@ QVariant QgsProcessingToolboxModel::data( const QModelIndex &index, int role ) c
       return QVariant();
   }
 
+  bool isRecentNode = false;
+  if ( QgsProcessingToolboxModelNode *node = index2node( index ) )
+    isRecentNode = node->nodeType() == QgsProcessingToolboxModelNode::NodeRecent;
+
   QgsProcessingProvider *provider = providerForIndex( index );
   QgsProcessingToolboxModelGroupNode *groupNode = qobject_cast< QgsProcessingToolboxModelGroupNode * >( index2node( index ) );
   const QgsProcessingAlgorithm *algorithm = algorithmForIndex( index );
@@ -293,6 +299,8 @@ QVariant QgsProcessingToolboxModel::data( const QModelIndex &index, int role ) c
             return algorithm->displayName();
           else if ( groupNode )
             return groupNode->name();
+          else if ( isRecentNode )
+            return tr( "Recently used" );
           else
             return QVariant();
 
@@ -323,6 +331,8 @@ QVariant QgsProcessingToolboxModel::data( const QModelIndex &index, int role ) c
             return provider->icon();
           else if ( algorithm )
             return algorithm->icon();
+          else if ( isRecentNode )
+            return QgsApplication::getThemeIcon( QStringLiteral( "/mIconHistory.svg" ) );
           else if ( !index.parent().isValid() )
             // top level groups get the QGIS icon
             return QgsApplication::getThemeIcon( QStringLiteral( "/providerQgis.svg" ) );
@@ -630,6 +640,8 @@ bool QgsProcessingToolboxProxyModel::filterAcceptsRow( int sourceRow, const QMod
     }
   }
 
+  bool isRecentNode = mModel->data( sourceIndex, QgsProcessingToolboxModel::RoleNodeType ).toInt() == QgsProcessingToolboxModelNode::NodeRecent;
+
   if ( QgsProcessingProvider *provider = mModel->providerForIndex( sourceIndex ) )
   {
     return hasChildren && provider->isActive();
@@ -637,7 +649,7 @@ bool QgsProcessingToolboxProxyModel::filterAcceptsRow( int sourceRow, const QMod
   else
   {
     // group
-    return hasChildren;
+    return hasChildren || isRecentNode;
   }
 }
 

src/gui/processing/qgsprocessingtoolboxmodel.h

@@ -50,6 +50,8 @@ class GUI_EXPORT QgsProcessingToolboxModelNode : public QObject
         sipType = sipType_QgsProcessingToolboxModelGroupNode;
       else if ( node->nodeType() == QgsProcessingToolboxModelNode::NodeAlgorithm )
         sipType = sipType_QgsProcessingToolboxModelAlgorithmNode;
+      else if ( node->nodeType() == QgsProcessingToolboxModelNode::NodeRecent )
+        sipType = sipType_QgsProcessingToolboxModelRecentNode;
     }
     else
       sipType = 0;
@@ -64,6 +66,7 @@ class GUI_EXPORT QgsProcessingToolboxModelNode : public QObject
       NodeProvider = 0, //!< Provider node
       NodeGroup, //!< Group node
       NodeAlgorithm, //!< Algorithm node
+      NodeRecent, //!< Recent algorithms node
     };
 
     ~QgsProcessingToolboxModelNode() override;
@@ -121,6 +124,27 @@ class GUI_EXPORT QgsProcessingToolboxModelNode : public QObject
 
 };
 
+/**
+ * Processing toolbox model node corresponding to the recent algorithms group
+ * \ingroup gui
+ * \since QGIS 3.2
+ * \warning Not part of stable API and may change in future QGIS releases.
+ */
+class GUI_EXPORT QgsProcessingToolboxModelRecentNode : public QgsProcessingToolboxModelNode
+{
+    Q_OBJECT
+
+  public:
+
+    /**
+     * Constructor for QgsProcessingToolboxModelRecentNode.
+     */
+    QgsProcessingToolboxModelRecentNode() = default;
+
+    NodeType nodeType() const override { return NodeRecent; }
+
+};
+
 /**
  * Processing toolbox model node corresponding to a Processing provider.
  * \ingroup gui