0029674: Improvements in Inspector tool

- preferences for dock windows geometry, tree view columns and current view projection;
- ViewControl package for common functionality between plugins;
- processing Location and Orientation for external TopoDS_Shape object
- 'F5' key to update content of each plugin
- visibility column in tree view (used now only in ShapeView)
- properties child item for context (presents tree of current Filters of context)

tools/TreeModel/TreeModel_VisibilityState.hxx

@@ -0,0 +1,81 @@
+// Created on: 2017-06-16
+// Created by: Natalia ERMOLAEVA
+// Copyright (c) 2017 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement. 
+
+#ifndef TreeModel_VisibilityState_H
+#define TreeModel_VisibilityState_H
+
+#include <inspector/TreeModel.hxx>
+#include <inspector/TreeModel_ModelBase.hxx>
+#include <inspector/TreeModel_ColumnType.hxx>
+
+#include <Standard.hxx>
+#include <Standard_Macro.hxx>
+
+#include <Standard_WarningsDisable.hxx>
+#include <QObject>
+#include <QString>
+#include <Standard_WarningsRestore.hxx>
+
+//! \class TreeModel_VisibilityState
+//! \brief Interface that provides connection between model and visualization control to:
+//! - know whether the model item is visible
+//! - change visibility of the model item
+class TREEMODEL_EXPORT TreeModel_VisibilityState : public QObject
+{
+  Q_OBJECT
+public:
+  //! Constructor
+  TreeModel_VisibilityState (TreeModel_ModelBase* theModel) : myModel (theModel) {}
+
+  //! Destructor
+  ~TreeModel_VisibilityState() {}
+
+  //! Returns true if visibility of the item can be changed
+  //! \param theIndex tree model index
+  //! \return boolean value
+  virtual bool CanBeVisible (const QModelIndex& theIndex) const = 0;
+
+  //! Sets visibility state
+  //! \param theIndex tree model index
+  //! \param theState visibility state
+  //! \param toEmitDataChanged boolean flag whether emit of the model should be done immediatelly
+  //! \return true if state is changed
+  virtual bool SetVisible (const QModelIndex& theIndex, const bool theState, const bool toEmitDataChanged = true) = 0;
+
+  //! Returns visibility state value
+  //! \param theIndex tree model index
+  //! \return boolean value
+  virtual bool IsVisible (const QModelIndex& theIndex) const = 0;
+
+public slots:
+  //! Processes the mouse clicked on the index.
+  //! It changes the item visibility if model allows to change it.
+  //! \theIndex tree model index
+  void OnClicked (const QModelIndex& theIndex);
+
+signals:
+  //! Signal after OnClicked is performed
+  //! \theIndex tree model index
+  void itemClicked (const QModelIndex& theIndex);
+
+protected:
+  //! tree view model
+  TreeModel_ModelBase* getModel() const { return myModel; }
+
+private:
+  TreeModel_ModelBase* myModel; //! tree view model
+};
+
+#endif