webenginewidgets

QT       += core gui  webenginewidgets  //窗口引擎部件
//显示原码的dialog

#ifndef DIALOG_H

#define DIALOG_H

#include <QDialog>

namespace Ui {

class Dialog;

}

class Dialog : public QDialog

{

    Q_OBJECT

public:

    explicit Dialog(QWidget *parent = 0);

    ~Dialog();

    void setWebSource(QString);  //给dialog设置文本

private:

    Ui::Dialog *ui;

};

#endif // DIALOG_H

#include "dialog.h"

#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent) :

    QDialog(parent),

    ui(new Ui::Dialog)

{

    ui->setupUi(this);

}

Dialog::~Dialog()

{

    delete ui;

}

void Dialog::setWebSource(QString str)

{

//提供一个接口 把文本显示到dialog

    ui->textEdit->setText(str);

}

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <QWebEngineView>  //web 引擎

#include <QUrl>  //url

#include <QProgressBar>  //进度条

#include <QFile> //加载配置文件

#include <QTextStream> //文本流

#include <QMessageBox>

#include <QDebug>

#include "dialog.h"

namespace Ui {

class MainWindow;

}

class MainWindow : public QMainWindow

{

    Q_OBJECT

public:

    explicit MainWindow(QWidget *parent = 0);

    ~MainWindow();

    void setmainpage(); //设置默认主页

private slots:

    void setUrlSlot(QUrl url);

    void deleteprogress(bool);

    void setTitle(QString);

    void setMainpageslot();

    void showcodeaction();//显示原码

private:

    Ui::MainWindow *ui;

    QWebEngineView* m_webView;  //全局的

    QProgressBar *progress;

};

#endif // MAINWINDOW_H

#include "mainwindow.h"

#include "ui_mainwindow.h"

//mainpage= http://www.baidu.com

//QString mainpage="mainpoage=http://www.baidu.com"

//QStingList list = mainpage.split("=");

//list  = mainpage      http://www.baidu.com

//ui.webView.lod(QUrl(list.at(1))); =http://www.baidu.com

//配置文件   win .ini   linux .conf

//在Debug 文件下  新建文件 mainpage.conf   在程序的运行目录

//QML   qt  Mark lauguage  language  标记性语言  模块渲染界面

// ui  用户界面  ux  用户体验

//  qml

/*

注册表相当于一个数据库

查看源代码 add 新文件  qt  ->  设计师类界面  dialog

 */

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{

    ui->setupUi(this);

    //创建QWebEngineView 对象

    this->

    m_webView = new QWebEngineView();

    //把webview 放入ui  ui的主窗口的布局添加窗口

   ui->centralWidget->layout()->addWidget(m_webView);

   setmainpage();

//实例化进度条

   this->progress = new QProgressBar;

   //添加到状态栏

   ui->statusBar->addWidget(this->progress);

   //连接信号

    connect(ui->frowardButton, &QPushButton::clicked, this, [this]() {

       QString url = ui->lineEdit->text();

        if (!url.isEmpty())

        {

           m_webView->load(url);

        }

    });

    //连接webview 进度数据  到进度条

    connect(m_webView,SIGNAL(loadProgress(int)),this->progress,SLOT(setValue(int)));

//连接entry信号
    connect(ui->lineEdit, &QLineEdit::returnPressed, this, [this]() {

       QString url = ui->lineEdit->text();

        if (!url.isEmpty())

        {

           m_webView->load(url);

        }

    });

//调用Webview 的槽函数

    connect(ui->frowardButton,SIGNAL(clicked(bool)),m_webView,SLOT(forward()));

    connect(ui->back,SIGNAL(clicked(bool)),m_webView,SLOT(back()));

    connect(ui->refreshButton,SIGNAL(clicked(bool)),m_webView,SLOT(reload()));

    connect(m_webView,SIGNAL(urlChanged(QUrl)),this,SLOT(setUrlSlot(QUrl)));

    //连接webView 加载完成信号  删除进度条

connect(m_webView,SIGNAL(loadFinished(bool)),this,SLOT(deleteprogress(bool)));

   //设置标题

connect(m_webView,SIGNAL(titleChanged(QString)),this,SLOT(setTitle(QString)));

//设置主页

connect(ui->action_M,SIGNAL(triggered(bool)),this,SLOT(setMainpageslot()));

connect(ui->action_S,SIGNAL(triggered(bool)),this,SLOT(showcodeaction()));

}

MainWindow::~MainWindow()

{

    delete ui;

}

void MainWindow::setmainpage()

{

    QString filename = "mainpage.conf";  //文件路径

    QFile *file = new QFile;  //文件对象

    file->setFileName(filename); //设置文件名

    bool ok = file->open(QIODevice::ReadOnly); //打开方式

    QTextStream in(file);

    if(ok)

        {

        //把内容读入 输入框

        m_webView->load(QUrl(in.readLine().split("=").at(1)));

    file->close();

    delete file;

    file = NULL;

    }else

        {

        QMessageBox::information(this,"Error Message","openfile Error"+file->errorString());

    }

}

//获取地址

void MainWindow::setUrlSlot(QUrl url)

{

    ui->lineEdit->setText(url.toString());

}

//删除进度条

void MainWindow::deleteprogress(bool ok)

{

    if(ok)

        {

        delete this->progress;

        this->progress = NULL;

      this->ui->statusBar->showMessage("Load finish",5*1000);

    }

}

void MainWindow::setTitle(QString title)

{

    this->setWindowTitle(title);

}

void MainWindow::setMainpageslot()

{

    QString filename = "mainpage.conf";  //文件路径

    QFile *file = new QFile;  //文件对象

    file->setFileName(filename); //设置文件名

    bool ok = file->open(QIODevice::WriteOnly); //打开方式

    if(ok)

        {

         QTextStream out(file);

        //把内容读入 输入框

 out<<"mainpage="+ui->lineEdit->text();

    file->close();

    delete file;

    file = NULL;

    QMessageBox::information(this,"Information","setmain page sucess");

    }else

        {

        qDebug()<<"set mainpage error";

        QMessageBox::information(this,"Error Message","openfile Error"+file->errorString());

    }

}

//查看原代码   没有实现

void MainWindow::showcodeaction()

{

    QString content=m_webView->page()->selectedText();

    Dialog *dialg=new Dialog;//Dialog

    dialg->setWebSource(content);

    dialg->show();

}