DocWindow.cpp

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// ======================================================================
//  DocWindow.cpp
// ======================================================================
//                   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
// ======================================================================

#include <QtWidgets>
#include "DocWindow.h"

// ----------------------------------------------------------------------
DocWindow::DocWindow(QWidget* pwgt/*=0*/) : QTextEdit(pwgt)
{
}

// ----------------------------------------------------------------------
void DocWindow::slotLoad()
{
    QString str = QFileDialog::getOpenFileName();
    if (str.isEmpty()) {
        return;
    }

    QFile file(str);
    if (file.open(QIODevice::ReadOnly)) {
        QTextStream stream(&file);
        setPlainText(stream.readAll());
        file.close();

        m_strFileName = str;
        emit changeWindowTitle(m_strFileName);
    }
}

// ----------------------------------------------------------------------
void DocWindow::slotSave()
{
    if (m_strFileName.isEmpty()) {
        slotSaveAs();
        return;
    }

    QFile file(m_strFileName);
    if (file.open(QIODevice::WriteOnly)) {
        QTextStream(&file) << toPlainText();
        file.close();
        emit changeWindowTitle(m_strFileName);
    }
}

// ----------------------------------------------------------------------
void DocWindow::slotSaveAs() 
{
    QString str = QFileDialog::getSaveFileName(0, m_strFileName);
    if (!str.isEmpty()) {
        m_strFileName = str;
        slotSave();
    }
}