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/***************************************************************************
* Copyright (c) 2022 Werner Mayer <wmayer[at]users.sourceforge.net> *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library 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 Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#ifndef GUI_SELECTIONOBSERVERPYTHON_H
#define GUI_SELECTIONOBSERVERPYTHON_H
#include <CXX/Objects.hxx>
#include "Selection.h"
namespace Gui
{
class GuiExport SelectionObserverPythonHandler
{
public:
/// Constructor
explicit SelectionObserverPythonHandler() = default;
virtual ~SelectionObserverPythonHandler();
void init(PyObject* obj);
void handleSelectionChanged(const SelectionChanges& msg);
protected:
void addSelection(const SelectionChanges&);
void removeSelection(const SelectionChanges&);
void setSelection(const SelectionChanges&);
void clearSelection(const SelectionChanges&);
void setPreselection(const SelectionChanges&);
void removePreselection(const SelectionChanges&);
void pickedListChanged();
private:
#define FC_PY_SEL_OBSERVER \
FC_PY_ELEMENT(onSelectionChanged) \
FC_PY_ELEMENT(addSelection) \
FC_PY_ELEMENT(removeSelection) \
FC_PY_ELEMENT(setSelection) \
FC_PY_ELEMENT(clearSelection) \
FC_PY_ELEMENT(setPreselection) \
FC_PY_ELEMENT(removePreselection) \
FC_PY_ELEMENT(pickedListChanged)
#undef FC_PY_ELEMENT
#define FC_PY_ELEMENT(_name) Py::Object py_##_name;
FC_PY_SEL_OBSERVER
};
/**
* The SelectionObserverPython class implements a mechanism to register
* a Python class instance implementing the required interface in order
* to be notified on selection changes.
*
* @author Werner Mayer
*/
class GuiExport SelectionObserverPython: public SelectionObserverPythonHandler,
public SelectionObserver
{
public:
/// Constructor
explicit SelectionObserverPython(
const Py::Object& obj,
ResolveMode resolve = ResolveMode::OldStyleElement
);
~SelectionObserverPython() override;
static void addObserver(const Py::Object& obj, ResolveMode resolve = ResolveMode::OldStyleElement);
static void removeObserver(const Py::Object& obj);
private:
void onSelectionChanged(const SelectionChanges& msg) override;
Py::Object inst;
static std::vector<SelectionObserverPython*> _instances;
};
} // namespace Gui
#endif // GUI_SELECTIONOBSERVERPYTHON_H
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