Qt：常见控件

末蓝、 2022-10-25 01:00 255阅读 0赞

#include "widget.h"
    
    #include <QLabel>     // disply static text, or image
    #include <QPushButton>
    #include <QLineEdit> // single line
    
    #include <QComboBox>
    #include <QCheckBox>
    #include <QRadioButton>
    #include <QTextEdit> // multi lines, rich text
    #include <QTextBrowser> // readonly textedit
    #include <QGroupBox>  //
    #include <QSlider>    // 模拟方式显示数值
    #include <QSpinBox>  // 数字
    #include <QDateEdit>
    #include <QTimeEdit>
    #include <QDateTimeEdit>
    #include <QTabWidget> // 不介绍,不算控件
    #include <QCompleter>
    #include <QHBoxLayout>
    #include <QDebug>
    #include <QPixmap>
    #include  <QVBoxLayout>
    #include <QLCDNumber>
    Widget::Widget(QWidget *parent)
        : QWidget(parent)
    {
        QVBoxLayout* lay = new QVBoxLayout(this);
    
    
        QPushButton* button;
    
    
        QLabel* label;
        lay->addWidget(label = new QLabel("<a href=www.baidu.com>baidu</a>"));
        connect(label, &QLabel::linkActivated, [](QString str){
               qDebug() << str;
           });
       // label->setPixmap(QPixmap("../qtblog.png"));
        QRadioButton* radio;
        lay->addWidget(radio = new QRadioButton("Radio"));
        radio->setStyleSheet("QRadioButton {font:bold 16px; color:red; padding:5px}");
        connect(radio, &QRadioButton::clicked, [](bool v){
                qDebug() << v;
            });
    
        QCheckBox *check;
        lay->addWidget(check = new QCheckBox("check box"));
        connect(check, &QCheckBox::clicked, [](bool v){
                qDebug() << v;
            });
    
        QComboBox* combo;
        lay->addWidget(combo = new QComboBox());
        combo->addItem("Select item1");
        combo->addItem("Select item2");
        combo->setEditable(true);
        connect(combo, SIGNAL(currentIndexChanged(QString)), this, SLOT(slotComboBoxIndexChanged(QString)));
        combo->setCompleter(new QCompleter(combo->model()));
    
        QTextEdit* edit;    //可以在QTextEdit中显示图片
        lay->addWidget(edit = new QTextEdit);
        edit->setText(
                      "<table border=1><tr><th>head1</th><th>head2</th></tr>"
                      "<tr><td>value1</td><td>value2</td></tr>"
                      "<tr><td>value3</td><td>value4</td></tr>"
                      "</table><br>"
                     "<img src=../test0005.jpg></img>"
                     );
        edit->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);  //添加滚动条
        edit->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);//水平方向滚动条关闭
    
    //    _edit = edit;
    //    connect(edit, &QTextEdit::textChanged, [&](){
    //     //   QTextEdit* edit = (QTextEdit*)this->sender();
    //        qDebug() << _edit->toPlainText();
    //    });
    
        QGroupBox* group;
        lay->addWidget(group = new QGroupBox("Some items"));
        QHBoxLayout* hBoxLay;
        group->setLayout(hBoxLay = new QHBoxLayout);
        hBoxLay->addWidget(new QPushButton("aaaa"));
        hBoxLay->addWidget(new QPushButton("aaaa"));
    
        QSlider* slider;
        QSpinBox* spinBox;
    
        lay->addWidget(slider = new QSlider(Qt::Horizontal));
        slider->setMaximum(100);
        slider->setMinimum(0);
    
        lay->addWidget(spinBox = new QSpinBox);
        spinBox->setMaximum(100);
        spinBox->setMinimum(0);
    
        connect(slider, SIGNAL(valueChanged(int)), spinBox, SLOT(setValue(int)));
        connect(spinBox, SIGNAL(valueChanged(int)), slider, SLOT(setValue(int)));
    
        QLCDNumber* lcd;
        lay->addWidget(lcd = new QLCDNumber(10));
        lcd->display(12345);
        lcd->setMode(QLCDNumber::Hex);
        lcd->setSegmentStyle(QLCDNumber::Outline);
    }
    
    void Widget::slotComboBoxIndexChanged(const QString & str)
    {
        qDebug() << "slotComboBoxIndexChanged" << str;
    }

![102087c3bf80c183f4e38e7fc9c8b7cd361.jpg][]

[102087c3bf80c183f4e38e7fc9c8b7cd361.jpg]: /images/20221024/5860db61e8964882aa37eb56c7b100b0.png