Using QDockWidget : QDockWidget « Qt « C++

1. C++
2. Qt
3. QDockWidget

Using QDockWidget

  

/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
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#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

class QDockWidget;
class QListWidget;
class QListWidgetItem;
class QTextBrowser;

class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);

private slots:
    void updateText(QListWidgetItem *item);

private:
    void setupContents();
    void setupDockWindow();
    void setupMenus();

    QDockWidget *contentsWindow;
    QListWidget *headingList;
    QTextBrowser *textBrowser;
};

#endif




#include <QtGui>

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    setWindowTitle("Dock Widgets");

    setupDockWindow();
    setupContents();
    setupMenus();

    textBrowser = new QTextBrowser(this);

    connect(headingList, SIGNAL(itemClicked(QListWidgetItem *)),
            this, SLOT(updateText(QListWidgetItem *)));

    updateText(headingList->item(0));
    headingList->setCurrentRow(0);
    setCentralWidget(textBrowser);
}

void MainWindow::setupContents()
{
    QFile titlesFile(":/Resources/titles.txt");
    titlesFile.open(QFile::ReadOnly);
    int chapter = 0;

    do {
        QString line = titlesFile.readLine().trimmed();
        QStringList parts = line.split("\t", QString::SkipEmptyParts);
        if (parts.size() != 2)
            break;

        QString chapterTitle = parts[0];
        QString fileName = parts[1];

        QFile chapterFile(fileName);

        chapterFile.open(QFile::ReadOnly);
        QListWidgetItem *item = new QListWidgetItem(chapterTitle, headingList);
        item->setData(Qt::DisplayRole, chapterTitle);
        item->setData(Qt::UserRole, chapterFile.readAll());
        item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);
        chapterFile.close();

        chapter++;
    } while (titlesFile.isOpen());

    titlesFile.close();
}

void MainWindow::setupDockWindow()
{
    contentsWindow = new QDockWidget(tr("Table of Contents"), this);
    contentsWindow->setAllowedAreas(Qt::LeftDockWidgetArea
                                  | Qt::RightDockWidgetArea);
    addDockWidget(Qt::LeftDockWidgetArea, contentsWindow);

    headingList = new QListWidget(contentsWindow);
    contentsWindow->setWidget(headingList);

}

void MainWindow::setupMenus()
{
    QAction *exitAct = new QAction(tr("E&xit"), this);
    exitAct->setShortcut(tr("Ctrl+Q"));
    exitAct->setStatusTip(tr("Exit the application"));
    connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));

    QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
    fileMenu->addAction(exitAct);
}

void MainWindow::updateText(QListWidgetItem *item)
{
    QString text = item->data(Qt::UserRole).toString();
    textBrowser->setHtml(text);
}











#include <QApplication>

#include "mainwindow.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QMainWindow *window = new MainWindow;
    window->show();
    window->resize(640, 480);
    return app.exec();
}

   
    
  

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