一起看代码来玩玩QT之05 Controls

来源：互联网发布：js判断只能输入正整数编辑：程序博客网时间：2024/05/16 09:18

pixmap : 像素图

combo : 组合

QObject::connect(&button,SIGNAL(clicked()),&w,SLOT(close()));

此连接信号槽可用 c++ lamboda表达式

 connect(radio, &QRadioButton::clicked, [](bool v){        qDebug() << v;    });

这需要在项目pro 中加 config += C++11

内容有点多，请诸位一个一个控件看，最好亲手打一遍！！！！！！！一个一个控件试！！！！！！！！！

.h 文件

#ifndef MYWIDGET_H#define MYWIDGET_H#include <QWidget>#include <QTextEdit>class MyWidget : public QWidget{    Q_OBJECTpublic:    explicit MyWidget(QWidget *parent = 0);    QTextEdit* _edit;signals:public slots:    void slotComboBoxIndexChanged(const QString&);};#endif // MYWIDGET_H

.cpp 文件

#include "MyWidget.h"#include <QApplication>#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>MyWidget::MyWidget(QWidget *parent) :    QWidget(parent){    QVBoxLayout* lay = new QVBoxLayout(this);    QLabel* label;    QComboBox* combo;    QPushButton* button;    QRadioButton* radio;    QTextEdit* edit;    QGroupBox* group;    lay->addWidget(label = new QLabel("<a href=www.baidu.com>baidu</a>"));    label->setPixmap(QPixmap("../aaa.png"));    connect(label, &QLabel::linkActivated, [](QString str){        qDebug() << str;    });    lay->addWidget(button = new QPushButton("Button"));    button->setStyleSheet("QPushButton {font:bold 16px; color:red; padding:5px}");    lay->addWidget(radio = new QRadioButton("Radio"));    radio->setStyleSheet("QRadioButton {font:bold 16px; color:red; padding:5px}");    connect(radio, &QRadioButton::clicked, [](bool v){        qDebug() << v;    });    lay->addWidget(new QCheckBox("check box"));    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()));    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=../aaa.png></img>");    _edit = edit;    connect(edit, &QTextEdit::textChanged, [&](){     //   QTextEdit* edit = (QTextEdit*)this->sender();        qDebug() << _edit->toPlainText();    });    edit->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);    edit->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);    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)));    lay->addWidget(new QDateTimeEdit);    QLCDNumber* lcd;    lay->addWidget(lcd = new QLCDNumber(10));    lcd->display(12345);    lcd->setMode(QLCDNumber::Hex);    lcd->setSegmentStyle(QLCDNumber::Outline);}void MyWidget::slotComboBoxIndexChanged(const QString &str){    qDebug() << "slotComboBoxIndexChanged" << str;}int main(int argc, char** argv){    QApplication app(argc, argv);    MyWidget w;    w.show();    return app.exec();}

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