如何将命令行插入GUI应用程序

时间:2014-01-01 15:00:22

标签: c++ qt qtgui qprocess qplaintextedit

我需要创建一个能够运行命令行批处理和命令的QT GUI应用程序。例如,ping,tcpdump等......

我会想象它是这样的: 带有QTableView的标准图形窗口,一些复选框等......带有组件实例QPlainTextEdit。该组件(QPlainTextEdit)将充当命令行,允许输入命令并捕获其输出。

这样的事情可能吗?该怎么做?

2 个答案:

答案 0 :(得分:1)

您可以将QProcess用于您的目的..

QProcess cmd;
cmd.start("cmd");

此处有更多细节..

http://www.qtcentre.org/threads/12757-QProcess-cmd

答案 1 :(得分:1)

主要思想是使用QProcess来运行命令。请参阅以下代码进行演示。

同步方法

QProcess process;

// If "command" is not in your path,
// use the corresponding relative or absolute path

process.start("command", QStringList()
                      << QString("-arg1")
                      << QString("arg2")
                      << QString("-arg3")
                      << QString("arg4"));

// Wait for it to start
if(!process.waitForStarted())
    return 0;

bool retval = false;
QByteArray buffer;
while ((retval = process.waitForFinished()));
    buffer.append(process.readAll());

if (!retval) {
    yourPlainTextEdit.appendPlainText(process.errorString());
} else {
    yourPlainTextEdit.appendPlainText(buffer);
}

异步方法

MyClass::MyClass(QQProcess *process, QObject *parent)
    : QObject(parent)
    , m_process(process)
{
    connect(m_process, SIGNAL(readyRead()), SLOT(handleReadyRead()));
    connect(m_process, SIGNAL(error(QProcess::ProcessError)), SLOT(handleError(QProcess::ProcessError)));
    connect(&m_timer, SIGNAL(timeout()), SLOT(handleTimeout()));

    m_timer.start(5000);
}

MyClass::~MyClass()
{
}

void MyClass::handleReadyRead()
{
    m_readData.append(m_process->readAll());

    if (!m_timer.isActive())
        m_timer.start(5000);
}

void MyClass::handleTimeout()
{
    if (m_readData.isEmpty()) {
        yourPlainTextEdit.appendPlainText("No data was currently available for reading from gnuplot");
    } else {
        yourPlainTextEdit.appendPlainText("Process successfully run");
    }

}

void GnuPlotReader::handleError(QProcess::ProcessError processError)
{
    if (processError == QProcess::ReadError) {
        appendPlainTextEdit.appendPlainText("An I/O error occurred while reading the data, error: %1").arg(m_process->errorString()));
        yourPlainTextEdit.appendPlainText(m_readData);
    }
}

免责声明:这是完全未经测试的代码,因此它可能存在编译器和运行时问题,但这应该可以很好地掌握它,而不用多说。