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/View/View_ToolButton.hxx

@@ -0,0 +1,64 @@
+// 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 View_ToolButton_H
+#define View_ToolButton_H
+
+#include <Standard_WarningsDisable.hxx>
+#include <QToolButton>
+#include <QMouseEvent>
+#include <QWidget>
+#include <Standard_WarningsRestore.hxx>
+
+//! \class View_Widget
+//! \brief It is a Qt control that implements change checked state for button by double click event
+//! Button becomes checked by double click mouse pressed and unchecked by the next press mouse
+class View_ToolButton : public QToolButton
+{
+  Q_OBJECT
+
+public:
+  View_ToolButton (QWidget* theParent) : QToolButton (theParent) {}
+  ~View_ToolButton() {}
+
+  //! Sets the button checkable, set whether the button checkable or not
+  //! \param theChecked boolean value
+  void SetButtonChecked (const bool theChecked) {setCheckable (theChecked); setChecked (theChecked); emit checkedStateChanged (theChecked); }
+
+signals:
+  //! Sends a signal about checked state is changed
+  //! \param theState the checked state
+  void checkedStateChanged (bool theState);
+
+protected:
+  //! Sets the button unchecked if it was checked
+  virtual void mousePressEvent (QMouseEvent* theEvent)
+  {
+    if (isChecked())
+      SetButtonChecked (false);
+    else
+      QToolButton::mousePressEvent (theEvent);
+  }
+
+  //! Sets the button checked if it was unchecked
+  virtual void mouseDoubleClickEvent (QMouseEvent* theEvent)
+  {
+    QToolButton::mouseDoubleClickEvent (theEvent);
+    if (!isChecked())
+      SetButtonChecked (true);
+  }
+};
+
+#endif