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QtConcurrent-run-free-function: Difference between revisions
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[[Category:snippets]] | [[Category:snippets]] | ||
To call a free function using QtConcurrent::run, simply pass the function name. | To call a free function using QtConcurrent::run, simply pass the function name. | ||
Line 28: | Line 24: | ||
#endif | #endif | ||
</code> | </code> | ||
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std::cout << "exit." << std::endl; | std::cout << "exit." << std::endl; | ||
} | } | ||
</code> | </code> | ||
Line 97: | Line 91: | ||
<connections/> | <connections/> | ||
</ui> | </ui> | ||
</code> | </code> | ||
Line 106: | Line 99: | ||
#include <QObject> | #include <QObject> | ||
#include <QThread> | #include <QThread> | ||
#include <iostream> | #include <iostream> | ||
Line 114: | Line 106: | ||
{ | { | ||
QApplication app(argc, argv); | QApplication app(argc, argv); | ||
Form form; | |||
Form form; | form.show(); | ||
return app.exec(); | |||
form.show(); | |||
return app.exec(); | |||
} | } | ||
</code> |
Revision as of 11:49, 24 March 2016
To call a free function using QtConcurrent::run, simply pass the function name.
form.h
#ifndef FORM_H
#define FORM_H
#include "ui_form.h"
class Form : public QWidget, private Ui::Form
{
Q_OBJECT
public slots:
void on_btnOpen_clicked();
public:
Form(QWidget *parent = 0);
};
#endif
form.cpp
#include <QtGui>
#include <QImage>
#include "form.h"
#include <iostream>
Form::Form(QWidget *parent)
: QWidget(parent)
{
setupUi(this);
}
void LongFunction()
{
for( int count = 0; count < 5; count++ )
{
sleep( 1 );
std::cout << "Ping long!" << std::endl;
}
}
void Form::on_btnOpen_clicked()
{
QFuture<void> result = QtConcurrent::run ( LongFunction );
//result.waitForFinished();
std::cout << "exit." << std::endl;
}
form.ui
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Form</class>
<widget class="QWidget" name="Form">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>400</width>
<height>300</height>
</rect>
</property>
<property name="windowTitle">
<string>Form</string>
</property>
<layout class="QVBoxLayout" name="verticalLayout">
<item>
<widget class="QPushButton" name="pushButton">
<property name="text">
<string>PushButton</string>
</property>
</widget>
</item>
</layout>
</widget>
<resources/>
<connections/>
</ui>
main.cpp
#include <QApplication>
#include <QObject>
#include <QThread>
#include <iostream>
#include "form.h"
int main(int argc, char*argv[])
{
QApplication app(argc, argv);
Form form;
form.show();
return app.exec();
}