c++ - 在主小部件下添加小部件(控制台)QT

Question

5 使用 MacOS，现在我有一个中央小部件作为控制台屏幕。这显示了来 self 的串口函数的输出。

在下面，我想添加一些其他小部件来执行其他操作，例如按钮、 slider 或液晶显示器。我想知道如何做到这一点。

我目前拥有的代码:

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    //******* Set up
    ui->setupUi(this);

    console = new Console;
    console->setEnabled(false);
    setCentralWidget(console);

    //create serialport object
    serial = new QSerialPort(this);

    //create settings object
    settings = new SettingsDialog;

    ui->actionConnect->setEnabled(true);
    ui->actionDisconnect->setEnabled(false);
    ui->actionQuit->setEnabled(true);
    ui->actionConfigure->setEnabled(true);

    initActionsConnections();

    /************** Connection Events ***********************/
    connect(serial, SIGNAL(error(QSerialPort::SerialPortError)), this,
            SLOT(handleError(QSerialPort::SerialPortError)));

    connect(serial, SIGNAL(readyRead()), this, SLOT(readData()));

    connect(console, SIGNAL(getData(QByteArray)), this, SLOT(writeData(QByteArray)));
}

但是，我希望这些小部件与控制台屏幕分开，控制台屏幕会自行显示一些输出。所以我想添加以下小部件:

/************** Adding Widgets *********************/
//creation and attribution of slider
slider = new QSlider();
slider->resize(255, 20);
slider->setOrientation(Qt::Horizontal);
slider->setRange(0, 255); //0-255 is range we can read

//creation and attribution of the lcd
lcd = new QLCDNumber();
lcd->setSegmentStyle(QLCDNumber::Flat);
lcd->resize(255, 50);

//layout with slider and lcd
main_layout = new QVBoxLayout();
main_layout->addWidget(slider);
main_layout->addWidget(lcd);

//***********some way add this main_layout underneath the console **********/

Answer 1

我建议您将 centralWidget 布局设置为 QVBoxLayout并将您的项目添加到 centralWidget->layout() .

“MainWindow”中的代码应该像下面这样改变。

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->centralWidget->setLayout(new QVBoxLayout);

    console = new Console;
    console->setEnabled(false);
    // Add this line instead of setting your console as central widget.
    ui->centralWidget->layout()->addWidget(Console);

    .... //Continue with rest of the things
}

添加额外小部件的代码应如下所示。

/************** Adding Widgets *********************/
//creation and attribution of slider
slider = new QSlider(this);
slider->resize(255, 20);
slider->setOrientation(Qt::Horizontal);
slider->setRange(0, 255); //0-255 is range we can read

//creation and attribution of the lcd
lcd = new QLCDNumber(this);
lcd->setSegmentStyle(QLCDNumber::Flat);
lcd->resize(255, 50);

//Adding the widgets created to the main layout.
ui->centralWidget->layout()->addWidget(slider);
ui->centralWidget->layout()->addWidget(lcd);

希望这就是您要找的。