From 799f8076977663f19a4e637a5ec2ebe8f1e66891 Mon Sep 17 00:00:00 2001
From: nds <nds@opencascade.com>
Date: Wed, 17 Jan 2018 07:54:38 +0300
Subject: [PATCH] #2309 Possibility to hide faces

---
 src/ModuleBase/ModuleBase_ResultPrs.cpp       | 20 ++++++++++++++++++
 src/ModuleBase/ModuleBase_ResultPrs.h         |  5 +++++
 .../ModuleBase_WidgetMultiSelector.cpp        | 21 ++++++++++++++++++-
 3 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/src/ModuleBase/ModuleBase_ResultPrs.cpp b/src/ModuleBase/ModuleBase_ResultPrs.cpp
index 6dd875f77..8d2aeb755 100755
--- a/src/ModuleBase/ModuleBase_ResultPrs.cpp
+++ b/src/ModuleBase/ModuleBase_ResultPrs.cpp
@@ -139,6 +139,26 @@ bool ModuleBase_ResultPrs::setSubShapeHidden(const NCollection_List<TopoDS_Shape
   return isModified;
 }
 
+//********************************************************************
+bool ModuleBase_ResultPrs::isSubShapeHidden(const TopoDS_Shape& theShape)
+{
+  if (theShape.IsNull() || theShape.ShapeType() != TopAbs_FACE) // only face shape can be hidden
+    return false;
+
+  if (myHiddenSubShapes.Contains(theShape))
+    return true;
+
+  // orientation of parameter shape(come from selection) may be wrong, check isEqual() to be sure
+  for (NCollection_List<TopoDS_Shape>::Iterator aShapeIt(myHiddenSubShapes); aShapeIt.More();
+    aShapeIt.Next())
+  {
+    if (theShape.IsEqual(aShapeIt.Value()))
+      return true;
+  }
+
+  return true;
+}
+
 //********************************************************************
 bool ModuleBase_ResultPrs::hasSubShapeVisible(
   const NCollection_List<TopoDS_Shape>& theShapesToSkip)
diff --git a/src/ModuleBase/ModuleBase_ResultPrs.h b/src/ModuleBase/ModuleBase_ResultPrs.h
index f3c42bc9e..0a1f999b7 100644
--- a/src/ModuleBase/ModuleBase_ResultPrs.h
+++ b/src/ModuleBase/ModuleBase_ResultPrs.h
@@ -93,6 +93,11 @@ public:
   /// \returns true if the presentation is changed, or false (if for example it was hidden)
   Standard_EXPORT bool setSubShapeHidden(const NCollection_List<TopoDS_Shape>& theShapes);
 
+  /// Returns true if parameter shape has been hidden
+  /// \param theShape sub-shape of the presentation shape
+  /// \return boolean value
+  Standard_EXPORT bool isSubShapeHidden(const TopoDS_Shape& theShape);
+
   /// Returns true if there are no hidden sub shapes or original shape has at least one not hidden
   /// \param theShapesToSkip container of shape to be hidden in the presentation (faces)
   /// \return boolean value
diff --git a/src/ModuleBase/ModuleBase_WidgetMultiSelector.cpp b/src/ModuleBase/ModuleBase_WidgetMultiSelector.cpp
index 17c9f5b6c..55eaf59eb 100755
--- a/src/ModuleBase/ModuleBase_WidgetMultiSelector.cpp
+++ b/src/ModuleBase/ModuleBase_WidgetMultiSelector.cpp
@@ -20,6 +20,8 @@
 
 #include <ModuleBase_WidgetMultiSelector.h>
 
+#include <GeomAPI_AISObject.h>
+
 #include <ModuleBase_ActionIntParameter.h>
 #include <ModuleBase_Definitions.h>
 #include <ModuleBase_Events.h>
@@ -31,6 +33,7 @@
 #include <ModuleBase_IViewer.h>
 #include <ModuleBase_IWorkshop.h>
 #include <ModuleBase_ListView.h>
+#include <ModuleBase_ResultPrs.h>
 #include <ModuleBase_Tools.h>
 #include <ModuleBase_ViewerPrs.h>
 #include <ModuleBase_WidgetShapeSelector.h>
@@ -46,6 +49,8 @@
 
 #include <Config_WidgetAPI.h>
 
+#include <AIS_InteractiveObject.hxx>
+
 #include <QGridLayout>
 #include <QLabel>
 #include <QListWidget>
@@ -924,12 +929,13 @@ bool ModuleBase_WidgetMultiSelector::findInSelection(const ObjectPtr& theObject,
     return true;
 
   bool aFound = false;
-  GeomShapePtr anEmptyShape(new GeomAPI_Shape());
   if (theShape.get()) { // treat shape equal to context as null: 2219, keep order of shapes in list
     const ResultPtr aContext = std::dynamic_pointer_cast<ModelAPI_Result>(theObject);
     if (aContext.get() && aContext->shape()->isEqual(theShape))
       theShape.reset();
   }
+
+  GeomShapePtr anEmptyShape(new GeomAPI_Shape());
   GeomShapePtr aShape = theShape.get() ? theShape : anEmptyShape;
   if (theGeomSelection.find(theObject) != theGeomSelection.end()) {// found
     const std::set<GeomShapePtr>& aShapes = theGeomSelection.at(theObject);
@@ -940,6 +946,19 @@ bool ModuleBase_WidgetMultiSelector::findInSelection(const ObjectPtr& theObject,
         aFound = aCShape->isSame(aShape);
     }
   }
+
+  // issue #2903: (Possibility to hide faces) - check whether given shape is a hidden sub-shape
+  if (!aFound && theWorkshop->hasSHIFTPressed() && theObject->isDisplayed()) {
+    AISObjectPtr anAIS = theWorkshop->findPresentation(theObject);
+    if (anAIS.get() != NULL) {
+      Handle(AIS_InteractiveObject) anAISIO = anAIS->impl<Handle(AIS_InteractiveObject)>();
+
+      Handle(ModuleBase_ResultPrs) aResultPrs = Handle(ModuleBase_ResultPrs)::DownCast(anAISIO);
+      if (!aResultPrs.IsNull() && aResultPrs->isSubShapeHidden(theShape->impl<TopoDS_Shape>()))
+        return true;
+    }
+  }
+
   return aFound;
 }
 
-- 
2.30.2