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//===========================================
// Lumina-desktop source code
// Copyright (c) 2017, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
// This is a simple class for launching/managing an external process in a non-interactive manner
// This object will clean itself up when finished and log all output to a particular file if designated
// otherwise it will suppress all output from the process
//===========================================
#ifndef _LUMINA_EXTERNAL_PROCESS_H
#define _LUMINA_EXTERNAL_PROCESS_H
#include <QProcess>
#include <QString>
#include <QTimer>
#include <QApplication>
#include <QDebug>
class ExternalProcess : public QProcess{
Q_OBJECT
private:
bool cursorRestored;
QString logoutput;
private slots:
void resetCursor(){
//qDebug() << "External Process: Reset Mouse Cursor =" << !cursorRestored;
if(!cursorRestored){
QApplication::restoreOverrideCursor();
cursorRestored = true;
}
}
void processStarting(){
//qDebug() << "Starting External Process: Mouse Notification =" << !cursorRestored;
if(!cursorRestored){
QApplication::setOverrideCursor( QCursor(Qt::BusyCursor) );
QTimer::singleShot(3000, this, SLOT(resetCursor()) );
}
}
void processFinished(){
//qDebug() << "External Process Finished: Reset Mouse Cursor =" << !cursorRestored;
if(!cursorRestored){
QApplication::restoreOverrideCursor();
cursorRestored = true;
}
//Clean up this object
this->deleteLater();
}
void updateLog(){
logoutput.append( QString(this->readAllStandardOutput()) );
}
public:
ExternalProcess(QString logfile = "", bool manageCursors = false) : QProcess(){
this->setProcessChannelMode(QProcess::MergedChannels);
cursorRestored = !manageCursors;
if(logfile.isEmpty()){
this->setStandardOutputFile(QProcess::nullDevice());
}else if(logfile=="stdout"){
connect(this, SIGNAL(readyReadStandardOutput()), this, SLOT(updateLog()) );
}else{
this->setStandardOutputFile(logfile);
}
//Setup the connection for automatic cleanup
connect(this, SIGNAL(started()), this, SLOT(processStarting()) );
connect(this, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(processFinished()) );
}
~ExternalProcess(){
/*if(this->state() == QProcess::Running){
this->detach(); //about to close down the QProcess - detach the other program so it can continue functioning normally.
}*/
}
QString log(){
//NOTE: This will only contain output if the "stdout" argument is used as the logfile
return logoutput;
}
static void launch(QString program, QStringList args = QStringList(), bool manageCursors = true){
//Quick launch of a process with logging disabled and automatic cleanup
ExternalProcess *tmp = new ExternalProcess("", manageCursors);
if(args.isEmpty()){ tmp->start(program); }
else{ tmp->start(program, args); }
}
};
#endif
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