HelpBrowser.h

Go to the documentation of this file.

// ======================================================================
//  HelpBrowser.h
// ======================================================================
//                   This file is a part of the book 
//             "Qt 5.10 Professional programming with C++"
//                       http://qt-book.com
// ======================================================================
//  Copyright (c) 2017 by Max Schlee
// ======================================================================

#pragma once

#include <QtWidgets>

// ======================================================================
class HelpBrowser : public QWidget {
    Q_OBJECT

public:
    HelpBrowser(const QString& strPath, 
                const QString& strFileName, 
                      QWidget* pwgt       = 0
               ) : QWidget(pwgt) 
    {
        QPushButton*  pcmdBack    = new QPushButton("<<");
        QPushButton*  pcmdHome    = new QPushButton("Home");
        QPushButton*  pcmdForward = new QPushButton(">>");
        QTextBrowser* ptxtBrowser = new QTextBrowser;

        connect(pcmdBack, SIGNAL(clicked()), 
                ptxtBrowser, SLOT(backward())
               );
        connect(pcmdHome, SIGNAL(clicked()), 
                ptxtBrowser, SLOT(home())
               );
        connect(pcmdForward, SIGNAL(clicked()), 
                ptxtBrowser, SLOT(forward())
               );
        connect(ptxtBrowser, SIGNAL(backwardAvailable(bool)), 
                pcmdBack, SLOT(setEnabled(bool))
               );
        connect(ptxtBrowser, SIGNAL(forwardAvailable(bool)), 
                pcmdForward, SLOT(setEnabled(bool))
               );

        ptxtBrowser->setSearchPaths(QStringList() << strPath);
        ptxtBrowser->setSource(QString(strFileName));

        //Layout setup
        QVBoxLayout* pvbxLayout = new QVBoxLayout;
        QHBoxLayout* phbxLayout = new QHBoxLayout;
        phbxLayout->addWidget(pcmdBack);
        phbxLayout->addWidget(pcmdHome);
        phbxLayout->addWidget(pcmdForward);
        pvbxLayout->addLayout(phbxLayout);    
        pvbxLayout->addWidget(ptxtBrowser);
        setLayout(pvbxLayout);
    }
};