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/**************************************************************
*
* 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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*************************************************************/
#ifndef SD_IDLE_DETECTION_HXX
#define SD_IDLE_DETECTION_HXX
#include <sal/types.h>
class Window;
namespace sd { namespace tools {
/** Detect whether the system is idle and some time consuming operation may
be carried out. This class ditinguishes between different states of
idle-ness.
*/
class IdleDetection
{
public:
/** When GetIdleState() returns this value, then the system is idle.
*/
static const sal_Int32 IDET_IDLE = 0x0000;
/** There are system event pending.
*/
static const sal_Int32 IDET_SYSTEM_EVENT_PENDING = 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.
*/
static const sal_Int32 IDET_FULL_SCREEN_SHOW_ACTIVE = 0x0002;
/** A slide show is running in a window.
*/
static const sal_Int32 IDET_WINDOW_SHOW_ACTIVE = 0x0004;
/** A window is being painted.
*/
static const sal_Int32 IDET_WINDOW_PAINTING = 0x0008;
/** 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 IDET_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 sal_Int32 GetIdleState (const ::Window* pWindow = NULL);
private:
/** Check whether there are input events pending.
*/
static sal_Int32 CheckInputPending (void);
/** Check whether a slide show is running full screen or in a window.
*/
static sal_Int32 CheckSlideShowRunning (void);
static sal_Int32 CheckWindowPainting (const ::Window& rWindow);
};
} } // end of namespace ::sd::tools
#endif
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