Qt实现编译本地文件生成运行程序的功能

发表于 更新于 分类于 Valine：

如何在文本编辑器中加入c、c++文本编译成可执行程序功能呢

添加系统环境

要进行c、c++文件的编译需要用到MinGW，查找本地路径(如: D:\Dev-Cpp\MinGW64\bin)并将其添加到系统环境变量Path中。

声明进程实例(MainWindow.h)

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#include <QProcess>
private:
    bool isRunning;
    QProcess process;

运行进程(MainWindow.cpp)

构造函数中将进程相应信号与槽函数对应

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connect(&process,SIGNAL(finished(int)),this,SLOT(runFinished(int)));
connect(&process,SIGNAL(readyReadStandardOutput()),this,SLOT(updateOutput()));
connect(&process,SIGNAL(readyReadStandardError()),this,SLOT(updateError()));

通过环境变量中配置的编译器编译源程序文件

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void MainWindow::Run(bool)
{
    QString filePath, fileName, fileSuffix, absolutePath;
    if(isRunning){
        process.terminate();
        ui->action_Run->setIcon(QIcon(":/images/run"));
        return;
    }
    if(activeEditor()){
        // 检查是否文件已保存
        if(activeEditor()->okToContinue() && !activeEditor()->toPlainText().isEmpty()){
            ui->mdiArea->activeSubWindow()->setWindowIcon(QIcon(":/images/fl"));
            isRunning = true;
            filePath = activeEditor()->getCurrentFile();
            fileName = QFileInfo(filePath).baseName();
            fileSuffix = QFileInfo(filePath).suffix();
            absolutePath = QFileInfo(filePath).absolutePath();
            buildPath= absolutePath + tr("/%1%2").arg(fileName).arg(".exe");
            ui->textEdit->append(tr("Starting compile %1...").arg(filePath));
            if(fileSuffix == "c"){
                ui->textEdit->append(tr("gcc %1 -o %2").arg(filePath).arg(buildPath));
                process.start("cmd", QStringList() << "/c" << 
				QString(tr("gcc ")+filePath+tr(" -o ")+buildPath));
                // +"& start " + buildPath
            }else if(fileSuffix == "cpp"){
                ui->textEdit->append(tr("g++ %1 -o %2").arg(filePath).arg(buildPath));
                process.start("cmd", QStringList() << "/c" << 
				QString(tr("g++ ")+filePath+tr(" -o ")+buildPath));
            }
            process.waitForStarted(-1);
            ui->action_Run->setIcon(QIcon(":/images/stop"));
            process.waitForFinished();//等待程序关闭
        }
    }
}

进程各种状态的处理槽函数

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// 编译进程运行结束
void MainWindow::runFinished(int code){
    static int run = 0;
    ui->action_Run->setIcon(QIcon(":/images/run"));
    isRunning=false;
    run++;
//    qDebug()<<code<<" "<<run<<endl;
    if(run%2 == 1){
        ui->textEdit->append(tr("compile process exited with code %1\n").arg(code));
    }else{
        ui->textEdit->append(tr("run exe process exited with code %1\n").arg(code));
    }
    // 如果返回值不为0则跳过运行程序直接加1并返回
    if(code){
        run++;
        return;
    }else if(!code && run%2 ==1){// 如果返回值是0(程序正常退出)且编译生成的程序还未运行过
        process.start("cmd", QStringList()<<"/c"<< QString("start " + buildPath));
        process.waitForStarted(-1);
        process.waitForFinished();//等待程序关闭
    }
}
// 编译进程输出
void MainWindow::updateOutput(){
    QString output=QString::fromLocal8Bit(process.readAllStandardOutput());
    ui->textEdit->setTextColor(Qt::blue);
    ui->textEdit->append(output);
}
void MainWindow::updateError(){
    QString error=QString::fromLocal8Bit(process.readAllStandardError());
    ui->textEdit->setTextColor(Qt::red);
    ui->textEdit->append(error);
    process.terminate();
    isRunning=false;
    ui->textEdit->setTextColor(Qt::blue);
}
// 滚动条自动往下滚动
void MainWindow::moveCurPos(){
    ui->textEdit->moveCursor(QTextCursor::End);
}

运行效果如下图:
run.png
runp.png