#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMessageBox>
#include <QTextStream>
#include <QTime>
#include <QProcess>
bool started = false;
QString path;
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->statusBar->showMessage("Waiting for input...");
QFile file("path.txt");
if(!file.open(QIODevice::ReadOnly)) {
QMessageBox::information(0, "Error", file.errorString());
}
QTextStream in(&file);
path = in.readLine();
file.close();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_2_clicked()
{
qApp->exit();
}
void delay(int n)
{
QTime dieTime = QTime::currentTime().addSecs(n);
while(QTime::currentTime() < dieTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
}
void MainWindow::on_pushButton_clicked()
{
if(!started) {
started = true;
qint32 waitSecs = ui->plainTextEdit->toPlainText().toInt();
QTime launchTime = QTime::currentTime().addSecs(waitSecs);
while(waitSecs > 0) {
waitSecs = QTime::currentTime().secsTo(launchTime);
ui->statusBar->showMessage(QString("Waiting %1 seconds to launch BLR launcher.").arg(waitSecs));
delay(1);
}
ui->statusBar->showMessage("Launching BLR launcher!");
QProcess *process = new QProcess(this);
process->start(path, QStringList() << "");
}
}
从上面的代码中可以看到(阅读最后几行),我有一个启动的进程。我想确保启动的窗口(通过该过程)是重点。
我知道有这个功能:http://qt-project.org/doc/qt-4.8/qapplication.html#setActiveWindow
它需要一个QWidget作为参数。也许我需要将QProcess转换为Qwidget?
答案 0 :(得分:0)
不是直接在调用QProcess :: start时调用可执行文件,而是将其用作操作系统中相关打开命令的参数。
例如,在OSX中我会使用
process->start("open programToRun.app");
如果你在Windows中,我肯定有一个等价的,也许使用:
process->start("cmd programToRun.exe").
Hoep有帮助。