Qt QTextBrowser的一個小例子

Large applications may require more online help than tooltips, status tips, and "What's This?" help can reasonably show. A simple solution to this
is to provide a help browser. Applications that include a help browser typically have a Help entry in the main window's Help menu and a Help button in every dialog.

In this section, we present the simple help browser shown in figure 1 and
explain how it can be used within an application. The window uses aQTextBrowser to
display help pages that are marked up with an HTML-based syntax. QTextBrowser can
handle a lot of HTML tags, so it is ideal for this purpose.

上面那段英文想看就看看，不想看就不要看了，關於QTextBrowser是什麼這裡就不說了，Qt官網上肯定有的，Google百度都可以找到的。

這個只是一個很小例子。希望能對大家學習Qt能有協助。

main.cpp

#include <QtGui/QApplication>#include "mainwindow.h"#include "helpbrowser.h"#include <QString>int main(int argc, char *argv[]){    QApplication a(argc, argv);    /*MainWindow w;    w.show();*/    const QString path("/root/hjm/wroking/Help/helpFile1130/Help_File1130");    const QString page("home.html");    helpbrowser h(path,page);    h.setGeometry(500,300,500,400);    h.show();        return a.exec();}

helpbrowser.h

#ifndef HELPBROWSER_H#define HELPBROWSER_H#include <QWidget>#include <QPushButton>#include <QTextBrowser>class QPushButton;class QTextBrowser;class helpbrowser : public QWidget{    Q_OBJECTpublic:    explicit helpbrowser(const QString &path,const QString &page,QWidget *parent = 0);    //static void showpage(const QString &page);private slots:    void updateWindowTitle();private:    QTextBrowser *textBrowser;    QPushButton  *homeButton;    QPushButton  *backButton;    QPushButton  *closeButton;    signals:    public slots:    };#endif // HELPBROWSER_H

helpbrowser.cpp

#include "helpbrowser.h"#include <QtGui>#include <QString>helpbrowser::helpbrowser(const QString &path,const QString &page,QWidget *parent) :    QWidget(parent){   setAttribute(Qt::WA_DeleteOnClose);   setAttribute(Qt::WA_GroupLeader);   textBrowser = new QTextBrowser;   homeButton =new QPushButton(tr("&Home"));   backButton =new QPushButton(tr("&Back"));   closeButton =new QPushButton(tr("Close"));   closeButton->setShortcut(tr("Esc"));   QHBoxLayout *buttonLayout =new QHBoxLayout;   buttonLayout->addWidget(homeButton);   buttonLayout->addWidget(backButton);   buttonLayout->addStretch();   buttonLayout->addWidget(closeButton);   QVBoxLayout *mainLayout =new QVBoxLayout;   mainLayout->addLayout(buttonLayout);   mainLayout->addWidget(textBrowser);   setLayout(mainLayout);   connect(homeButton,SIGNAL(clicked()),textBrowser,SLOT(home()));   connect(backButton,SIGNAL(clicked()),textBrowser,SLOT(backward()));   connect(closeButton,SIGNAL(clicked()),this,SLOT(close()));   connect(textBrowser,SIGNAL(sourceChange(const QUrl&)),this,SLOT(updateWindowTitle()));   textBrowser->setSearchPaths(QStringList()<<path<<":/images");   textBrowser->setSource(page);}void helpbrowser::updateWindowTitle(){    setWindowTitle(tr("Help:%1").arg(textBrowser->documentTitle()));}