copserv.cpp

在嵌入式LINUX下

#include <QPushButton>
#include <QSlider>
#include <QLabel>
#include <QDial>
#include <QLCDNumber>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QGridLayout>
#include <QSettings>
#include <QApplication>
#include <QCoreApplication>
#include <unistd.h>
#include <sys/types.h>

#include "CopServ.h"

CopServ::CopServ() : QWidget()
{
    createScreen();
}

void CopServ::createScreen()
{
    QPushButton* celBtn = new QPushButton("Cel");
    QPushButton* fahBtn = new QPushButton("Fah");
    QPushButton* quitBtn = new QPushButton("Quit");

    QGridLayout *mainLayout = new QGridLayout;
    mainLayout->addWidget(celBtn, 0, 0);
    mainLayout->addWidget(fahBtn, 0, 1);
    mainLayout->addWidget(quitBtn, 1, 0);
    setLayout(mainLayout);

    connect(celBtn, SIGNAL(clicked()), this, SLOT(launchCel()));
    connect(fahBtn, SIGNAL(clicked()), this, SLOT(launchFah()));
    connect(quitBtn, SIGNAL(clicked()), qApp, SLOT(quit()));

    setGeometry(0, 50, 240, 320);
    setWindowTitle("Server Window");
}

void CopServ::launchApp(const char* path)
{
    if (path == NULL)
    {
        qDebug("Launch path is NULL!\n");
    }
    
    pid_t pid = fork();

    if (pid == 0)
    {
        qDebug("new process forked. PID is:%d\n", getpid());
        int result = execl(path, path, 0);

        if (result < 0)
        {
            qDebug("failed to launch application!\n");
        }
        _exit(-1);
    }
}

void CopServ::launchCel()
{
    launchApp("./cel/cel");
}
void CopServ::launchFah()
{
    launchApp("./fah/fah");
}