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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#pragma once
#include <o3tl/typed_flags_set.hxx>
namespace vcl { class Window; }
namespace sd::tools {
enum class IdleState {
/** When GetIdleState() returns this value, then the system is idle.
*/
Idle = 0x0000,
/** There are system event pending.
*/
SystemEventPending = 0x0001,
/** A full screen slide show is running and is active. In contrast
there may be a full screen show be running in an inactive window,
i.e. in the background.
*/
FullScreenShowActive = 0x0002,
/** A slide show is running in a window.
*/
WindowShowActive = 0x0004,
/** A window is being painted.
*/
WindowPainting = 0x0008,
};
} // end of namespace ::sd::tools
namespace o3tl {
template<> struct typed_flags<::sd::tools::IdleState> : is_typed_flags<::sd::tools::IdleState, 0x0f> {};
}
namespace sd::tools {
/** Detect whether the system is idle and some time consuming operation may
be carried out. This class distinguishes between different states of
idle-ness.
*/
class IdleDetection
{
public:
/** Determine whether the system is idle.
@param pWindow
When a valid Window pointer is given then it is checked
whether the window is currently being painting.
@return
This method either returns IdleState::Idle or a combination of
IdleStates values or-ed together that describe what the system
is currently doing so that the caller can decide what to do.
*/
static IdleState GetIdleState (const vcl::Window* pWindow);
private:
/** Check whether there are input events pending.
*/
static IdleState CheckInputPending();
/** Check whether a slide show is running full screen or in a window.
*/
static IdleState CheckSlideShowRunning();
static IdleState CheckWindowPainting (const vcl::Window& rWindow);
};
} // end of namespace ::sd::tools
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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