QT常用控件之QVBoxLayout，QRadioButton，QCheckBox，QMenu，QAction

QT常用控件的组合

#include "mainwindow.h"#include <QGridLayout>#include <QVBoxLayout>#include <QWidget>#include <QRadioButton>//单选框#include <QCheckBox>//复选框#include <QPushButton>#include <QMenu>#include <QAction>MainWindow::MainWindow(QWidget *parent)    : QMainWindow(parent){    QGridLayout *grid = new QGridLayout;    grid->addWidget(createFirstExclusiveGroup(),0,0);    grid->addWidget(createSecondExclusiveGroup(),0,1);    grid->addWidget(createNonExclusiveGroup(),1,0);    grid->addWidget(createPushButtonGroup(),1,1);    QWidget *widget = new QWidget;    widget->setLayout(grid);    widget->resize(480, 320);    setCentralWidget(widget);    setWindowTitle(tr("Group Boxes"));}MainWindow::~MainWindow(){}/* * QGroupBox窗口部件提供了一个有标题的组合框。组合框提供一个框架、一个标题和一个键盘快捷键， * 并且显示在它里面地其它不同窗口部件。标题在上面，键盘快捷键移动键盘焦点到组合框的一个子 * 窗口部件，并且子窗口部件将会排列在这个框架中地一个数组中。*/QGroupBox *MainWindow::createFirstExclusiveGroup(){    QGroupBox *groupBox = new QGroupBox(tr("Exclusive Radio Buttons"));//定义组合框的标题    QRadioButton *radio1 = new QRadioButton(tr("&Radio button 1"));//定义三个单选框    QRadioButton *radio2 = new QRadioButton(tr("R&adio button 2"));    QRadioButton *radio3 = new QRadioButton(tr("Ra&dio button 3"));    radio1->setChecked(true);//默认首选第一个    QVBoxLayout *vbox = new QVBoxLayout;//垂直分布    vbox->addWidget(radio1);    vbox->addWidget(radio2);    vbox->addWidget(radio3);    vbox->addStretch(1);//按比例分配空余空间,确保这些按钮处在他们所在布局的上方。    groupBox->setLayout(vbox);    return groupBox;}QGroupBox *MainWindow::createSecondExclusiveGroup(){    QGroupBox *groupBox = new QGroupBox(tr("E&xclusive Radio Buttons"));    groupBox->setCheckable(true);//组框使能选择钮开启    groupBox->setChecked(true);//初始化使能状态    QRadioButton *radio1 = new QRadioButton(tr("Rad&io button1"));    QRadioButton *radio2 = new QRadioButton(tr("Radi&o buttoon2"));    QRadioButton *radio3 = new QRadioButton(tr("Radio &button3"));    radio1->setChecked(true);    QCheckBox *checkBox = new QCheckBox(tr("Ind&ependent checkbox"));    checkBox->setChecked(true);//默认被选中    QVBoxLayout *vbox = new QVBoxLayout;    vbox->addWidget(radio1);    vbox->addWidget(radio2);    vbox->addWidget(radio3);    vbox->addWidget(checkBox);    groupBox->setLayout(vbox);    return groupBox;}QGroupBox *MainWindow::createNonExclusiveGroup(){    QGroupBox *groupBox = new QGroupBox(tr("No-Exclusive Checkboxes"));    groupBox->setFlat(true);//平面组框    QCheckBox *checkBox1 = new QCheckBox(tr("&Checkbox 1"));    QCheckBox *checkBox2 = new QCheckBox(tr("C&heckbox 2"));    checkBox2->setChecked(true);    QCheckBox *tristateBox = new QCheckBox(tr("Tri-&state buttton"));    tristateBox->setTristate(true);//是否启用三种状态切换    tristateBox->setCheckState(Qt::PartiallyChecked);//介于Qt::Unchecked和Qt::Checked之间    QVBoxLayout *vbox = new QVBoxLayout;    vbox->addWidget(checkBox1);    vbox->addWidget(checkBox2);    vbox->addWidget(tristateBox);    vbox->addStretch(1);    groupBox->setLayout(vbox);    return groupBox;}QGroupBox *MainWindow::createPushButtonGroup(){    QGroupBox *groupBox = new QGroupBox(tr("&Push Button"));    groupBox->setCheckable(true);    groupBox->setChecked(true);    QPushButton *pushButton = new QPushButton(tr("&Normal Button"));    QPushButton *toggleButton = new QPushButton(tr("&Toggle Button"));    toggleButton->setCheckable(true);//拴属性使能,即二稳态按钮    toggleButton->setChecked(true);//默认是一直按下    QPushButton *flatButton = new QPushButton(tr("&Flat Button"));    flatButton->setFlat(true);//平面按钮    QPushButton *popupButton = new QPushButton(tr("Pop&up Button"));    QMenu *menu = new QMenu(this);    menu->addAction((tr("&First Item")));    menu->addAction((tr("&Second Item")));    menu->addAction((tr("Third Item")));    menu->addAction(tr("F&ourth Item"));    popupButton->setMenu(menu);//按钮上增加菜单    //QAction类提供了一个可以同时出现在菜单和工具条上的抽象用户界面操作    QAction *newAction = menu->addAction(tr("Submenu"));    QMenu *subMenu = new QMenu(tr("Popup Submenu"));    subMenu->addAction(tr("Item 1"));    subMenu->addAction(tr("Item 2"));    subMenu->addAction(tr("Item 3"));    newAction->setMenu(subMenu);    QVBoxLayout *vbox = new QVBoxLayout;    vbox->addWidget(pushButton);    vbox->addWidget(toggleButton);    vbox->addWidget(flatButton);    vbox->addWidget(popupButton);    groupBox->setLayout(vbox);    return groupBox;}