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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) 2008-2011 ZenJu (zhnmju123 AT gmx.de) *
// **************************************************************************
//
#ifndef STATUSHANDLER_H_INCLUDED
#define STATUSHANDLER_H_INCLUDED
#include <wx/string.h>
#include <string>
#include "../shared/int64.h"
const int UI_UPDATE_INTERVAL = 100; //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
//interfaces for status updates (can be implemented by GUI or Batch mode)
//report status during comparison and synchronization
struct ProcessCallback
{
virtual ~ProcessCallback() {}
//identifiers of different phases
enum Process
{
PROCESS_NONE = 10,
PROCESS_SCANNING,
PROCESS_COMPARING_CONTENT,
PROCESS_SYNCHRONIZING
};
//these methods have to be implemented in the derived classes to handle error and status information
virtual void initNewProcess(int objectsTotal, zen::Int64 dataTotal, Process processID) = 0; //informs about the total amount of data that will be processed from now on
//called periodically after data was processed: expected(!) to update GUI!
virtual void reportInfo(const wxString& text) = 0;
//note: this one must NOT throw in order to properly allow undoing setting of statistics!
//it is in general paired with a call to requestUiRefresh() to compensate!
virtual void updateProcessedData(int objectsProcessed, zen::Int64 dataProcessed) = 0; //throw()
//opportunity to abort must be implemented in a frequently executed method like requestUiRefresh()
virtual void requestUiRefresh() = 0; //throw ?
//this method is triggered repeatedly by requestUiRefresh() and can be used to refresh the ui by dispatching pending events
virtual void forceUiRefresh() = 0;
//error handling:
enum Response
{
IGNORE_ERROR = 10,
RETRY
};
virtual Response reportError (const wxString& errorMessage) = 0; //recoverable error situation
virtual void reportFatalError(const wxString& errorMessage) = 0; //non-recoverable error situation, implement abort!
virtual void reportWarning (const wxString& warningMessage, bool& warningActive) = 0;
};
//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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