#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
/* 载入html网页 */
m_pWebView = new QWebView();
m_pWebView->load(QUrl("file:///D:/jsTest.html"));
m_pWebView->show();
/* 开启JavaScript支持 */
QWebSettings *pWebSettings = m_pWebView->page()->settings();
pWebSettings->setAttribute(QWebSettings::JavascriptEnabled,true);
/* 窗体布局, 添加按钮 */
QPushButton *pEventBtn = new QPushButton(tr("QT Invoke JavaScript web page Object"));
QPushButton *pcloseBtn = new QPushButton(tr("close"));
/* 布局：网页与按钮为上下布局，两按钮为水平居中布局 */
QHBoxLayout *pBtnLayout = new QHBoxLayout;
pBtnLayout->addWidget(pEventBtn);
pBtnLayout->addWidget(pcloseBtn);
pBtnLayout->setAlignment(Qt::AlignCenter);
QVBoxLayout *pMainLayout = new QVBoxLayout;
pMainLayout->addWidget(m_pWebView);
pMainLayout->addLayout(pBtnLayout);
QWidget *widget = new QWidget;
widget->setLayout(pMainLayout);
setCentralWidget(widget);
/* 建立信号与槽, 每次载入html时发送段信号 */
connect(m_pWebView->page()->mainFrame(),SIGNAL(javaScriptWindowObjectCleared()),
this,SLOT(addObjectToJs()));
connect(pEventBtn,SIGNAL(clicked()),this,SLOT(testJs()));
connect(pcloseBtn,SIGNAL(clicked()),this,SLOT(close()));
testStr.clear();
}
MainWindow::~MainWindow()
{
if(m_pWebView != NULL)
{
delete m_pWebView;
m_pWebView = NULL;
}
/* 必须的，否则，在debug编译模式下就会出现leak错误 */
QWebSettings::globalSettings()->clearMemoryCaches();
delete ui;
}
/* 这个public slot槽函数是为了响应JavaScript的的invoke的 */
void MainWindow::jsInvokeQt()
{
qDebug()<
}
/* 将MainWindows这个类的名称&&对象指针发送给JavaScript */
void MainWindow::addObjectToJs()
{
m_pWebView->page()->mainFrame()->addToJavaScriptWindowObject("MainWindow",this);
}
/* Qt来 invoke JavaScript里面的disp_messagebox()函数 */
void MainWindow::testJs()
{
qDebug()<
m_pWebView->page()->mainFrame()->evaluateJavaScript("disp_messagebox()");
}
/* JavaScript invoke Qt里面的public slot 槽函数 */
void MainWindow::setInfor(const QString str)
{
qDebug()<
if(str.isEmpty())
{
qDebug()<
return;
}
else
{
testStr = str;
}
}
/* JavaScript invoke Qt里面的public slot 槽函数 */
QString MainWindow::getInfor()
{
qDebug()<
return testStr;
}
-----------------------------------------------------------------------------
functiondisp_messagebox()
{
alert("ThisisjavaScriptMessageBoxcomefromalert!")
}
functiondisp_qtmessage()
{
alert("disp_messageboxfunction,whoisinJavaScript!")
MainWindow.jsInvokeQt();
MainWindow.setInfor("Qtchangestring");
alert(MainWindow.getInfor());
}
