58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
|
/*
|
||
|
|
* This program source code file is part of KiCad, a free EDA CAD application.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2019 KiCad Developers, see CHANGELOG.TXT for contributors.
|
||
|
|
*
|
||
|
|
* This program 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 2
|
||
|
|
* of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program 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 for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, you may find one here:
|
||
|
|
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
|
||
|
|
* or you may search the http://www.gnu.org website for the version 2 license,
|
||
|
|
* or you may write to the Free Software Foundation, Inc.,
|
||
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef COMMON_WIDGETS_BUSY_INDICATOR__H
|
||
|
|
#define COMMON_WIDGETS_BUSY_INDICATOR__H
|
||
|
|
|
||
|
|
#include <functional>
|
||
|
|
#include <memory>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A class that can be used to implement a "busy" indicator. The exact form
|
||
|
|
* of the busy indicator is unspecified. It could be a "spinner" cursor in a GUI
|
||
|
|
* context, for example.
|
||
|
|
*
|
||
|
|
* This base class provides a "null" implementation, and can be overriden for
|
||
|
|
* specific behaviours.
|
||
|
|
*
|
||
|
|
* THe busy-ness semantics are defined by this object's lifetime.
|
||
|
|
*/
|
||
|
|
class BUSY_INDICATOR
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
/**
|
||
|
|
* A factory function that returns a new busy indicator.
|
||
|
|
*
|
||
|
|
* Because BUSY_INDICATORs are RAII objects (i.e. the busy-ness is defined
|
||
|
|
* by the object's lieftime), it's convenient to pass a factory function for
|
||
|
|
* a client to be able to make a busy indicator when needed.
|
||
|
|
*/
|
||
|
|
using FACTORY = std::function<std::unique_ptr<BUSY_INDICATOR>()>;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This class is intended to be handled by pointer-to-base class
|
||
|
|
*/
|
||
|
|
virtual ~BUSY_INDICATOR() = default;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // COMMON_WIDGETS_BUSY_INDICATOR__H
|