Qt基础布局

这是Qt官方提供的基础布局demo及其运行效果。

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtWidgets>
 
MainWindow::MainWindow(QWidget *parent)
    : QWidget(parent)
    //, ui(new Ui::MainWindow)
{
    //ui->setupUi(this);
    //this->setWindowFlags(Qt::FramelessWindowHint);
    this->resize(1022,670);
 
    
    createMenu();
    createHorizontalGroupBox();
    createGridGroupBox();
    createFormGroupBox();
//! [0]
 
//! [1]
    bigEditor = new QTextEdit;
    bigEditor->setPlainText(tr("This widget takes up all the remaining space "
                               "in the top-level layout."));
 
    buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok
                                     | QDialogButtonBox::Cancel);
//! [1]
 
//! [2]
    QVBoxLayout *mainLayout = new QVBoxLayout;
//! [2] //! [3]
    mainLayout->setMenuBar(menuBar);
//! [3] //! [4]
    mainLayout->addWidget(horizontalGroupBox);
    mainLayout->addWidget(gridGroupBox);
    mainLayout->addWidget(formGroupBox);
    mainLayout->addWidget(bigEditor);
    mainLayout->addWidget(buttonBox);
 
//! [4] //! [5]
    this->setLayout(mainLayout);
 
    setWindowTitle(tr("Basic Layouts"));
}
 
 
//! [6]
void MainWindow::createMenu()
{
    menuBar = new QMenuBar;
   // menuBar->setParent(this);
 
    fileMenu = new QMenu(tr("&File"));
    exitAction = fileMenu->addAction(tr("Exit"));
    menuBar->addMenu(fileMenu);
 
//    connect(exitAction, &QAction::triggered, this, &MainWindow::accept);
}
//! [6]
 
//! [7]
void MainWindow::createHorizontalGroupBox()
{
    horizontalGroupBox = new QGroupBox(tr("Horizontal layout"));
    QHBoxLayout *layout = new QHBoxLayout;
 
    for (int i = 0; i < NumButtons; ++i) {
        buttons[i] = new QPushButton(tr("Button %1").arg(i + 1));
        layout->addWidget(buttons[i]);
    }
    horizontalGroupBox->setLayout(layout);
}
//! [7]
 
//! [8]
void MainWindow::createGridGroupBox()
{
    gridGroupBox = new QGroupBox(tr("Grid layout"));
//! [8]
    QGridLayout *layout = new QGridLayout;
 
//! [9]
    for (int i = 0; i < NumGridRows; ++i) {
        labels[i] = new QLabel(tr("Line %1:").arg(i + 1));
        lineEdits[i] = new QLineEdit;
        layout->addWidget(labels[i], i + 1, 0);
        layout->addWidget(lineEdits[i], i + 1, 1);
    }
 
//! [9] //! [10]
    smallEditor = new QTextEdit;
    smallEditor->setPlainText(tr("This widget takes up about two thirds of the "
                                 "grid layout."));
    layout->addWidget(smallEditor, 0, 2, 4, 1);
//! [10]
 
//! [11]
    layout->setColumnStretch(1, 10);
    layout->setColumnStretch(2, 20);
    gridGroupBox->setLayout(layout);
}
//! [11]
 
//! [12]
void MainWindow::createFormGroupBox()
{
    formGroupBox = new QGroupBox(tr("Form layout"));
    QFormLayout *layout = new QFormLayout;
    layout->addRow(new QLabel(tr("Line 1:")), new QLineEdit);
    layout->addRow(new QLabel(tr("Line 2, long text:")), new QComboBox);
    layout->addRow(new QLabel(tr("Line 3:")), new QSpinBox);
    formGroupBox->setLayout(layout);
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 

运行效果：