#13997 3dView: Show active filter name(s) below Z-scale indicator

Adds a new HUD label in the upper-left of the 3D view that reads
"Filter : <name(s)>" whenever a cell, property, or per-view data
filter is active. The label is hidden when nothing is enabled.

Names are joined per the source collection's AND/OR combine mode, and
contributions from different collections are concatenated with ", ".
On Eclipse views the unified RimFilterInViewCollection is used as the
single anchor; GeoMech views aggregate cell and GeoMech property
filters directly.

ApplicationLibCode/ProjectDataModel/CellFilters/CMakeLists_files.cmake

@@ -18,6 +18,7 @@ set(SOURCE_GROUP_HEADER_FILES
     ${CMAKE_CURRENT_LIST_DIR}/RimCellIndexFilter.h
     ${CMAKE_CURRENT_LIST_DIR}/RimUserDefinedIndexFilter.h
     ${CMAKE_CURRENT_LIST_DIR}/RimFilterInViewCollection.h
+    ${CMAKE_CURRENT_LIST_DIR}/RimFilterDisplayUtil.h
 )
 
 set(SOURCE_GROUP_SOURCE_FILES
@@ -40,6 +41,7 @@ set(SOURCE_GROUP_SOURCE_FILES
     ${CMAKE_CURRENT_LIST_DIR}/RimCellIndexFilter.cpp
     ${CMAKE_CURRENT_LIST_DIR}/RimUserDefinedIndexFilter.cpp
     ${CMAKE_CURRENT_LIST_DIR}/RimFilterInViewCollection.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/RimFilterDisplayUtil.cpp
 )
 
 list(APPEND CODE_HEADER_FILES ${SOURCE_GROUP_HEADER_FILES})

ApplicationLibCode/ProjectDataModel/CellFilters/RimFilterDisplayUtil.cpp

@@ -0,0 +1,36 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2026 Equinor ASA
+//
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+//
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#include "RimFilterDisplayUtil.h"
+
+#include "RimCellFilter.h"
+
+#include <QStringList>
+
+QString RimFilterDisplayUtil::filterNamesJoined( const std::vector<RimCellFilter*>& filters, bool useAndOperation )
+{
+    QStringList names;
+    for ( auto* f : filters )
+    {
+        if ( f && f->isFilterEnabled() ) names << f->name();
+    }
+    if ( names.isEmpty() ) return {};
+
+    const QString sep = useAndOperation ? QStringLiteral( " AND " ) : QStringLiteral( " OR " );
+    return names.join( sep );
+}

ApplicationLibCode/ProjectDataModel/CellFilters/RimFilterDisplayUtil.h

@@ -0,0 +1,30 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2026 Equinor ASA
+//
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+//
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include <QString>
+
+#include <vector>
+
+class RimCellFilter;
+
+namespace RimFilterDisplayUtil
+{
+QString filterNamesJoined( const std::vector<RimCellFilter*>& filters, bool useAndOperation );
+}

ApplicationLibCode/ProjectDataModel/CellFilters/RimFilterInViewCollection.cpp

@@ -25,12 +25,14 @@
 #include "RimDataFilterInView.h"
 #include "RimDataFilterInViewCollection.h"
 #include "RimEclipsePropertyFilterCollection.h"
+#include "RimFilterDisplayUtil.h"
 #include "RimTools.h"
 
 #include "cafCmdFeatureMenuBuilder.h"
 #include "cafPdmUiTreeOrdering.h"
 
 #include <QIcon>
+#include <QStringList>
 #include <QVariant>
 
 CAF_PDM_SOURCE_INIT( RimFilterInViewCollection, "FilterInViewCollection" );
@@ -105,6 +107,43 @@ RimDataFilterInViewCollection* RimFilterInViewCollection::dataFiltersInView() co
     return m_dataFiltersInView();
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+QString RimFilterInViewCollection::activeFiltersDisplayText() const
+{
+    if ( !isChecked() ) return {};
+
+    QStringList parts;
+
+    if ( auto* cf = m_cellFilters(); cf && cf->isActive() && cf->hasActiveFilters() )
+    {
+        const QString cellPart = RimFilterDisplayUtil::filterNamesJoined( cf->filters(), cf->useAndOperation() );
+        if ( !cellPart.isEmpty() ) parts << cellPart;
+    }
+
+    const bool useAndOperation = true;
+
+    if ( auto* pf = m_propertyFilters(); pf && pf->isActive && pf->hasActiveFilters() )
+    {
+        const QString propPart = RimFilterDisplayUtil::filterNamesJoined( pf->filtersForEvaluation(), useAndOperation );
+        if ( !propPart.isEmpty() ) parts << propPart;
+    }
+
+    if ( auto* df = m_dataFiltersInView(); df && df->isChecked() && df->hasActiveFilters() )
+    {
+        std::vector<RimCellFilter*> sourceFilters;
+        for ( auto* w : df->activeWrappers() )
+        {
+            if ( w && w->sourceFilter() ) sourceFilters.push_back( w->sourceFilter() );
+        }
+        const QString dataPart = RimFilterDisplayUtil::filterNamesJoined( sourceFilters, useAndOperation );
+        if ( !dataPart.isEmpty() ) parts << dataPart;
+    }
+
+    return parts.join( QStringLiteral( ", " ) );
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------

ApplicationLibCode/ProjectDataModel/CellFilters/RimFilterInViewCollection.h

@@ -54,6 +54,8 @@ public:
     RimEclipsePropertyFilterCollection* propertyFilters() const;
     RimDataFilterInViewCollection*      dataFiltersInView() const;
 
+    QString activeFiltersDisplayText() const;
+
 protected:
     void defineUiTreeOrdering( caf::PdmUiTreeOrdering& uiTreeOrdering, QString uiConfigName = "" ) override;
     void fieldChangedByUi( const caf::PdmFieldHandle* changedField, const QVariant& oldValue, const QVariant& newValue ) override;

ApplicationLibCode/ProjectDataModel/GeoMech/RimGeoMechView.cpp

@@ -38,11 +38,13 @@
 #include "RimCellFilterCollection.h"
 #include "RimEclipseResultDefinition.h"
 #include "RimEclipseView.h"
+#include "RimFilterDisplayUtil.h"
 #include "RimGeoMechCase.h"
 #include "RimGeoMechCellColors.h"
 #include "RimGeoMechFaultReactivationResult.h"
 #include "RimGeoMechPart.h"
 #include "RimGeoMechPartCollection.h"
+#include "RimGeoMechPropertyFilter.h"
 #include "RimGeoMechPropertyFilterCollection.h"
 #include "RimGridCollection.h"
 #include "RimIntersectionCollection.h"
@@ -1075,6 +1077,30 @@ const RimPropertyFilterCollection* RimGeoMechView::propertyFilterCollection() co
     return geoMechPropertyFilterCollection();
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+QString RimGeoMechView::activeFiltersDisplayText() const
+{
+    QStringList parts;
+
+    const QString cellPart = RimGridView::activeFiltersDisplayText();
+    if ( !cellPart.isEmpty() ) parts << cellPart;
+
+    if ( const auto* pfc = geoMechPropertyFilterCollection(); pfc && pfc->isActive && pfc->hasActiveFilters() )
+    {
+        std::vector<RimCellFilter*> asCellFilters;
+        for ( size_t i = 0; i < pfc->propertyFilters.size(); i++ )
+        {
+            if ( RimGeoMechPropertyFilter* p = pfc->propertyFilters[i] ) asCellFilters.push_back( p );
+        }
+        const QString propPart = RimFilterDisplayUtil::filterNamesJoined( asCellFilters, /*useAnd*/ true );
+        if ( !propPart.isEmpty() ) parts << propPart;
+    }
+
+    return parts.join( QStringLiteral( ", " ) );
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------

ApplicationLibCode/ProjectDataModel/GeoMech/RimGeoMechView.h

@@ -93,6 +93,8 @@ public:
 
     bool isUsingFormationNames() const override;
 
+    QString activeFiltersDisplayText() const override;
+
     void calculateCurrentTotalCellVisibility( cvf::UByteArray* totalVisibility, int viewerTimeStep ) override;
 
     void updateLegendTextAndRanges( RimRegularLegendConfig* legendConfig, int viewerTimeStep );

ApplicationLibCode/ProjectDataModel/Rim3dView.cpp

@@ -335,6 +335,7 @@ QWidget* Rim3dView::createViewWidget( QWidget* mainWindowParent )
     m_viewer->setAxisLabels( xLabel, yLabel, zLabel );
 
     updateZScaleLabel();
+    updateFilterLabel();
     return m_viewer->layoutWidget();
 }
 
@@ -717,6 +718,7 @@ void Rim3dView::createDisplayModelAndRedraw()
         onCreateDisplayModel();
         createHighlightAndGridBoxDisplayModel();
         updateDisplayModelVisibility();
+        updateFilterLabel();
 
         if ( m_cameraPosition().isIdentity() )
         {
@@ -1281,6 +1283,33 @@ void Rim3dView::updateZScaleLabel()
     if ( viewer() ) viewer()->setZScale( m_scaleZ() );
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+QString Rim3dView::activeFiltersDisplayText() const
+{
+    return {};
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void Rim3dView::updateFilterLabel()
+{
+    if ( !viewer() ) return;
+
+    const QString text = activeFiltersDisplayText();
+    if ( text.isEmpty() )
+    {
+        viewer()->showFilterLabel( false );
+    }
+    else
+    {
+        viewer()->setFilterText( QStringLiteral( "Filter : %1" ).arg( text ) );
+        viewer()->showFilterLabel( true );
+    }
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------

ApplicationLibCode/ProjectDataModel/Rim3dView.h

@@ -185,6 +185,9 @@ public:
     bool   isScaleZEditable();
     double scaleZ() const;
 
+    virtual QString activeFiltersDisplayText() const;
+    void            updateFilterLabel();
+
     bool                    isMasterView() const;
     Rim3dView*              activeComparisonView() const;
     void                    setComparisonView( Rim3dView* compView );

ApplicationLibCode/ProjectDataModel/RimEclipseView.cpp

@@ -2597,6 +2597,16 @@ const RimPropertyFilterCollection* RimEclipseView::propertyFilterCollection() co
     return eclipsePropertyFilterCollection();
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+QString RimEclipseView::activeFiltersDisplayText() const
+{
+    if ( m_filterInViewCollection() ) return m_filterInViewCollection()->activeFiltersDisplayText();
+
+    return RimGridView::activeFiltersDisplayText();
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------

ApplicationLibCode/ProjectDataModel/RimEclipseView.h

@@ -176,6 +176,8 @@ public:
 
     bool isUsingFormationNames() const override;
 
+    QString activeFiltersDisplayText() const override;
+
     void calculateCurrentTotalCellVisibility( cvf::UByteArray* totalVisibility, int timeStep ) override;
 
     void calculateCellVisibility( cvf::UByteArray* visibility, std::vector<RivCellSetEnum> geomTypes, int timeStep = 0 ) override;

ApplicationLibCode/ProjectDataModel/RimGridView.cpp

@@ -19,9 +19,11 @@
 #include "RimGridView.h"
 
 #include "Rim3dOverlayInfoConfig.h"
+#include "RimCellFilter.h"
 #include "RimCellFilterCollection.h"
 #include "RimEclipseCase.h"
 #include "RimEclipseResultDefinition.h"
+#include "RimFilterDisplayUtil.h"
 #include "RimGeoMechPartCollection.h"
 #include "RimGeoMechResultDefinition.h"
 #include "RimGeoMechView.h"
@@ -243,6 +245,17 @@ const RimCellFilterCollection* RimGridView::cellFilterCollection() const
     }
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+QString RimGridView::activeFiltersDisplayText() const
+{
+    const auto* coll = cellFilterCollection();
+    if ( !coll || !coll->isActive() || !coll->hasActiveFilters() ) return {};
+
+    return RimFilterDisplayUtil::filterNamesJoined( coll->filters(), coll->useAndOperation() );
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------

ApplicationLibCode/ProjectDataModel/RimGridView.h

@@ -69,6 +69,8 @@ public:
 
     bool isGridVisualizationMode() const override;
 
+    QString activeFiltersDisplayText() const override;
+
     void updateWellMeasurements();
     void updateViewTreeItems( RiaDefines::ItemIn3dView itemType ) override;
 

ApplicationLibCode/UserInterface/RiuViewer.cpp

@@ -148,6 +148,14 @@ RiuViewer::RiuViewer( QWidget* parent )
     m_showZScaleLabel    = true;
     m_hideZScaleCheckbox = false;
 
+    // Filter label
+    m_filterLabel = new QLabel();
+    m_filterLabel->setFrameShape( QFrame::NoFrame );
+    m_filterLabel->setAlignment( Qt::AlignLeft );
+    m_filterLabel->setObjectName( "FilterLabel" );
+    m_filterLabel->setFont( font );
+    m_showFilterLabel = false;
+
     // Animation progress bar
     m_animationProgress = new caf::QStyledProgressBar( "AnimationProgress" );
     m_animationProgress->setFormat( "Time Step: %v/%m" );
@@ -183,6 +191,7 @@ RiuViewer::RiuViewer( QWidget* parent )
         m_animationProgress->setFont( regTestFont );
         m_histogramWidget->setFont( regTestFont );
         m_zScaleLabel->setFont( regTestFont );
+        m_filterLabel->setFont( regTestFont );
     }
 
     // When a context menu is created in the viewer is, and the action triggered is displaying a dialog,
@@ -543,6 +552,15 @@ void RiuViewer::paintOverlayItems( QPainter* painter )
         m_zScaleLabel->render( painter, pos );
     }
 
+    if ( m_showFilterLabel ) // Filter label, drawn just below the Z scale label
+    {
+        QSize  size( m_filterLabel->sizeHint().width(), m_filterLabel->sizeHint().height() );
+        int    yTop = margin + edgeAxisFrameBorderHeight + ( m_showZScaleLabel ? m_zScaleLabel->height() : 0 );
+        QPoint pos( margin + edgeAxisFrameBorderWidth, yTop );
+        m_filterLabel->resize( size.width(), size.height() );
+        m_filterLabel->render( painter, pos );
+    }
+
     if ( !m_cursorPositionDomainCoords.isUndefined() )
     {
         if ( mainCamera() )
@@ -615,6 +633,22 @@ void RiuViewer::setZScale( double scale )
     if ( isScaleChanged ) m_selectionVisualizerManager->updateVisibleEditors();
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RiuViewer::showFilterLabel( bool enable )
+{
+    m_showFilterLabel = enable;
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RiuViewer::setFilterText( const QString& text )
+{
+    m_filterLabel->setText( text );
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
@@ -1459,6 +1493,8 @@ void RiuViewer::updateOverlayItemsStyle()
         caf::StyleSheetTools::createFrameStyleSheet( "QLabel", "VersionInfo", contrastColor, backgroundColor, backgroundColor ) );
     m_zScaleLabel->setStyleSheet(
         caf::StyleSheetTools::createFrameStyleSheet( "QLabel", "ZScaleLabel", contrastColor, backgroundColor, backgroundColor ) );
+    m_filterLabel->setStyleSheet(
+        caf::StyleSheetTools::createFrameStyleSheet( "QLabel", "FilterLabel", contrastColor, backgroundColor, backgroundColor ) );
     m_histogramWidget->setStyleSheet(
         caf::StyleSheetTools::createFrameStyleSheet( "QWidget", "HistogramWidget", contrastColor, backgroundColor, backgroundFrameColor ) );
 

ApplicationLibCode/UserInterface/RiuViewer.h

@@ -89,6 +89,9 @@ public:
     void showZScaleLabel( bool enable );
     void setZScale( double scale );
 
+    void showFilterLabel( bool enable );
+    void setFilterText( const QString& text );
+
     void showHistogram( bool enable );
     void setHistogram( double min, double max, const std::vector<size_t>& histogram );
     void setHistogramPercentiles( double pmin, double pmax, double mean );
@@ -179,6 +182,9 @@ private:
     double  m_zScale;
     int     m_fontSize;
 
+    QLabel* m_filterLabel;
+    bool    m_showFilterLabel;
+
     caf::QStyledProgressBar*  m_animationProgress;
     caf::QStyledProgressBar*  m_animationProgressCompView;
     bool                      m_showAnimProgress;