Qt之QtWebKit(二)
继续学习QtWebkit.今天做个登录的例子让Qt对象和Javascript通信。其实就是将C++对象注册为一个javascript对象到html。然后调用C++函数。
- //loginform.h
- #ifndef LOGINFORM_H
- #define LOGINFORM_H
- #include
- namespace Ui {
- class LoginForm;
- }
- class LoginForm : public QWidget
- {
- Q_OBJECT
- public:
- explicit LoginForm(QWidget *parent = 0);
- ~LoginForm();
- private:
- Ui::LoginForm *ui;
- public slots:
- void javaScriptWindowObjectCleared();
- void login();
- };
- #endif // LOGINFORM_H
- //loginform.cpp
- #include "loginform.h"
- #include "ui_loginform.h"
- #include
- #include
- #include
- LoginForm::LoginForm(QWidget *parent) :
- QWidget(parent),
- ui(new Ui::LoginForm)
- {
- ui->setupUi(this);
- ui->webView->setUrl(QUrl("qrc:/loginForm.html"));
- connect(ui->webView->page()->mainFrame(), SIGNAL(javaScriptWindowObjectCleared()), this, SLOT(javaScriptWindowObjectCleared()));
- resize(200,300);
- }
- LoginForm::~LoginForm()
- {
- delete ui;
- }
- void LoginForm::javaScriptWindowObjectCleared()
- {
- ui->webView->page()->mainFrame()->addToJavaScriptWindowObject("loginForm", this);
- }
- void LoginForm::login()
- {
- QWebFrame *frame = ui->webView->page()->mainFrame();
- QWebElement userNameEle = frame->findFirstElement("#userName");
- QWebElement passwordEle = frame->findFirstElement("#password");
- QString userName = userNameEle.evaluateJavaScript("this.value").toString();
- QString password = passwordEle.evaluateJavaScript("this.value").toString();
- QMessageBox *loginMsgBox = new QMessageBox(this);
- loginMsgBox->setIcon(QMessageBox::Information);
- loginMsgBox->setWindowTitle(tr("登录信息"));
- if(userName == password) {
- loginMsgBox->setText(tr("你的用户名为： %1,密码为: %2").arg(userName).arg(password));
- }else {
- loginMsgBox->setText(tr("用户名或密码错误"));
- }
- loginMsgBox->setDefaultButton(QMessageBox::Ok);
- loginMsgBox->exec();
- }
- //mainwindow.h
- #ifndef MAINWINDOW_H
- #define MAINWINDOW_H
- #include
- class MainWindow : public QMainWindow
- {
- Q_OBJECT
- public:
- MainWindow(QWidget *parent = 0);
- ~MainWindow();
- };
- #endif // MAINWINDOW_H
- //mainwindow.cpp
- #include "mainwindow.h"
- #include "loginform.h"
- MainWindow::MainWindow(QWidget *parent)
- : QMainWindow(parent)
- {
- this->setWindowTitle(tr("登录"));
- LoginForm *loginForm = new LoginForm(this);
- this->setCentralWidget(loginForm);
- this->setUnifiedTitleAndToolBarOnMac(true);
- this->setFixedSize(300,200);
- }
- MainWindow::~MainWindow()
- {
- }
- //loginForm.html
- "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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登录 -
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