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我想在QT Creator中創建一個簡單的GUI應用程序,它使用wget
從網站下載文件。我希望能夠在GUI中看到wget
輸出。在Gui中顯示wget控制檯輸出
我想這樣的輸出:
--2014-04-27 13:58:58-- http://google.com/
Resolving google.com (google.com)... 74.125.224.192, 74.125.224.193, 74.125.224.206, ...
Connecting to google.com (google.com)|74.125.224.192|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: http://www.google.com/ [following]
--2014-04-27 13:58:58-- http://www.google.com/
Resolving www.google.com (www.google.com)... 74.125.224.210, 74.125.224.209, 74.125.224.208, ...
Connecting to www.google.com (www.google.com)|74.125.224.210|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: ‘index.html’
[ <=> ] 11,802 --.-K/s in 0.005s
2014-04-27 13:58:58 (2.16 MB/s) - ‘index.html’ saved [11802]
這是我到目前爲止所。它下載文件,但在文本瀏覽器中看不到任何輸出。我將QProcess輸出傳送到文本瀏覽器。像ls
這樣的命令會顯示輸出。
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QProcess>
#include <stdlib.h>
#include <string>
using namespace std;
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
process = new QProcess(this);
//connect (process, SIGNAL(readyReadStandardOutput()), this, SLOT(printOutput()));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
ui->label->setText("Pressed!");
}
void MainWindow::printOutput()
{
ui->display->setPlainText(process->readAllStandardOutput());
}
void MainWindow::on_lineEdit_returnPressed()
{ connect (process, SIGNAL(readyReadStandardOutput()), this, SLOT(printOutput()));
string result = "wget ";
result += ui->lineEdit->text().toStdString();
ui->label->setText("Fetching...");
QString lawl = QString::fromStdString(result);
options.clear();
#if defined(Q_OS_LINUX)
options << "-c" << lawl;
process->start("/bin/sh", options);
#elif defined(Q_OS_WIN)
process->start(ui->lineEdit->text(), options);
#endif
process->waitForFinished();
}
隨着process->setProcessChannelMode(QProcess::MergedChannels);
輸出:
129K=0.09s
2014-04-27 19:11:14 (129 KB/s) - ‘index.html.3’ saved [11786]
這可能有所幫助:http://stackoverflow.com/questions/3852587/how-to-get-stdout-from-a-qprocess –
@ 1.618謝謝!它確實提供了輸出,但並不完全是整個事情。我用輸出更新了問題。 –
'wget'可能會根據輸出是否爲終端而改變其輸出。 (它可以通過C的'isatty'函數或類似的函數來檢測這個)。如果是這種情況,你必須做一些「創建一個僞TTY」的詭計來讓它輸出你想要的東西(我沒有細節方便;抱歉)。 –