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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_ASYNCHRONOUS_CALL_HXX
#define SD_ASYNCHRONOUS_CALL_HXX
#include <vcl/timer.hxx>
#include <memory>
#include <boost/function.hpp>
namespace sd { namespace tools {
/** Store a function object and execute it asynchronous.
The features of this class are:
a) It provides a wrapper around a VCL Timer so that generic function
objects can be used.
b) When more than one function objects are posted to be executed later
then the pending ones are erased and only the last one will actually be
executed.
Use this class like this:
aInstanceOfAsynchronousCall.Post(
::boost::bind(
::std::mem_fun(&DrawViewShell::SwitchPage),
pDrawViewShell,
11));
*/
class AsynchronousCall
{
public:
/** Create a new asynchronous call. Each object of this class processes
one (semantical) type of call.
*/
AsynchronousCall (void);
~AsynchronousCall (void);
/** Post a function object that is to be executed asynchronously. When
this method is called while the current function object has not bee
executed then the later is destroyed and only the given function
object will be executed.
@param rFunction
The function object that may be called asynchronously in the
near future.
@param nTimeoutInMilliseconds
The timeout in milliseconds until the function object is
executed.
*/
typedef ::boost::function0<void> AsynchronousFunction;
void Post (
const AsynchronousFunction& rFunction,
sal_uInt32 nTimeoutInMilliseconds=10);
private:
Timer maTimer;
/** The function object that will be executed when the TimerCallback
function is called the next time. This pointer may be NULL.
*/
::std::auto_ptr<AsynchronousFunction> mpFunction;
DECL_LINK(TimerCallback,Timer*);
};
} } // end of namespace ::sd::tools
#endif
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