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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) ZenJu (zhnmju123 AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef STATUSHANDLER_H_INCLUDED
#define STATUSHANDLER_H_INCLUDED
#include "../process_callback.h"
#include <string>
#include <zen/int64.h>
const int UI_UPDATE_INTERVAL = 100; //unit: [ms]; perform ui updates not more often than necessary, 100 seems to be a good value with only a minimal performance loss
bool updateUiIsAllowed(); //test if a specific amount of time is over
void updateUiNow(); //do the updating
/*
Updating GUI is fast!
time per single call to ProcessCallback::forceUiRefresh()
- Comparison 25 µs
- Synchronization 0.6 ms (despite complex graph control!)
*/
//gui may want to abort process
struct AbortCallback
{
virtual ~AbortCallback() {}
virtual void requestAbortion() = 0;
};
//actual callback implementation will have to satisfy "process" and "gui"
class StatusHandler : public ProcessCallback, public AbortCallback
{
public:
StatusHandler() : abortRequested(false) {}
virtual void requestUiRefresh()
{
if (updateUiIsAllowed()) //test if specific time span between ui updates is over
forceUiRefresh();
if (abortRequested)
abortThisProcess(); //abort can be triggered by requestAbortion()
}
virtual void abortThisProcess() = 0;
virtual void requestAbortion() { abortRequested = true; } //this does NOT call abortThisProcess immediately, but when appropriate (e.g. async. processes finished)
bool abortIsRequested() { return abortRequested; }
private:
bool abortRequested;
};
#endif // STATUSHANDLER_H_INCLUDED
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