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#include <QtGui>

#include "window.h"

//! [0]

Window::Window(QWidget *parent)

    : QDialog(parent)

{

    browseButton = createButton(tr("&Browse..."), SLOT(browse()));

    findButton = createButton(tr("&Find"), SLOT(find()));

    fileComboBox = createComboBox(tr("*"));

    textComboBox = createComboBox();

    directoryComboBox = createComboBox(QDir::currentPath());

    fileLabel = new QLabel(tr("Named:"));

    textLabel = new QLabel(tr("Containing text:"));

    directoryLabel = new QLabel(tr("In directory:"));

    filesFoundLabel = new QLabel;

    createFilesTable();

//! [0]

//! [1]

    QHBoxLayout *buttonsLayout = new QHBoxLayout;

    buttonsLayout->addStretch();

    buttonsLayout->addWidget(findButton);

    QGridLayout *mainLayout = new QGridLayout;

    mainLayout->addWidget(fileLabel, 0, 0);

    mainLayout->addWidget(fileComboBox, 0, 1, 1, 2);

    mainLayout->addWidget(textLabel, 1, 0);

    mainLayout->addWidget(textComboBox, 1, 1, 1, 2);

    mainLayout->addWidget(directoryLabel, 2, 0);

    mainLayout->addWidget(directoryComboBox, 2, 1);

    mainLayout->addWidget(browseButton, 2, 2);

    mainLayout->addWidget(filesTable, 3, 0, 1, 3);

    mainLayout->addWidget(filesFoundLabel, 4, 0);

    mainLayout->addLayout(buttonsLayout, 5, 0, 1, 3);

    setLayout(mainLayout);

    setWindowTitle(tr("Find Files"));

    resize(700, 300);

}

//! [1]

//! [2]

void Window::browse()

{

    QString directory = QFileDialog::getExistingDirectory(this,

                               tr("Find Files"), QDir::currentPath());

    if (!directory.isEmpty()) {

        if (directoryComboBox->findText(directory) == -1)

            directoryComboBox->addItem(directory);

        directoryComboBox->setCurrentIndex(directoryComboBox->findText(directory));

    }

}

//! [2]

static void updateComboBox(QComboBox *comboBox)

{

    if (comboBox->findText(comboBox->currentText()) == -1)

        comboBox->addItem(comboBox->currentText());

}

//! [3]

void Window::find()

{

    filesTable->setRowCount(0);

    QString fileName = fileComboBox->currentText();

    QString text = textComboBox->currentText();

    QString path = directoryComboBox->currentText();

//! [3]

    updateComboBox(fileComboBox);

    updateComboBox(textComboBox);

    updateComboBox(directoryComboBox);

//! [4]

    currentDir = QDir(path);

    QStringList files;

    if (fileName.isEmpty())

        fileName = "*";

    files = currentDir.entryList(QStringList(fileName),

                                 QDir::Files | QDir::NoSymLinks);

    if (!text.isEmpty())

        files = findFiles(files, text);

    showFiles(files);

}

//! [4]

//! [5]

QStringList Window::findFiles(const QStringList &files, const QString &text)

{

    QProgressDialog progressDialog(this);

    progressDialog.setCancelButtonText(tr("&Cancel"));

    progressDialog.setRange(0, files.size());

    progressDialog.setWindowTitle(tr("Find Files"));

//! [5] //! [6]

    QStringList foundFiles;

    for (int i = 0; i < files.size(); ++i) {

        progressDialog.setValue(i);

        progressDialog.setLabelText(tr("Searching file number %1 of %2...")

                                    .arg(i).arg(files.size()));

        qApp->processEvents();

//! [6]

        if (progressDialog.wasCanceled())

            break;

//! [7]

        QFile file(currentDir.absoluteFilePath(files[i]));

        if (file.open(QIODevice::ReadOnly)) {

            QString line;

            QTextStream in(&file);

            while (!in.atEnd()) {

                if (progressDialog.wasCanceled())

                    break;

                line = in.readLine();

                if (line.contains(text)) {

                    foundFiles << files[i];

                    break;

                }

            }

        }

    }

    return foundFiles;

}

//! [7]

//! [8]

void Window::showFiles(const QStringList &files)

{

    for (int i = 0; i < files.size(); ++i) {

        QFile file(currentDir.absoluteFilePath(files[i]));

        qint64 size = QFileInfo(file).size();

        QTableWidgetItem *fileNameItem = new QTableWidgetItem(files[i]);

        fileNameItem->setFlags(fileNameItem->flags() ^ Qt::ItemIsEditable);

        QTableWidgetItem *sizeItem = new QTableWidgetItem(tr("%1 KB")

                                             .arg(int((size + 1023) / 1024)));

        sizeItem->setTextAlignment(Qt::AlignRight | Qt::AlignVCenter);

        sizeItem->setFlags(sizeItem->flags() ^ Qt::ItemIsEditable);

        int row = filesTable->rowCount();

        filesTable->insertRow(row);

        filesTable->setItem(row, 0, fileNameItem);

        filesTable->setItem(row, 1, sizeItem);

    }

    filesFoundLabel->setText(tr("%1 file(s) found").arg(files.size()) +

                             (" (Double click on a file to open it)"));

}

//! [8]

//! [9]

QPushButton *Window::createButton(const QString &text, const char *member)

{

    QPushButton *button = new QPushButton(text);

    connect(button, SIGNAL(clicked()), this, member);

    return button;

}

//! [9]

//! [10]

QComboBox *Window::createComboBox(const QString &text)

{

    QComboBox *comboBox = new QComboBox;

    comboBox->setEditable(true);

    comboBox->addItem(text);

    comboBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);

    return comboBox;

}

//! [10]

//! [11]

void Window::createFilesTable()

{

    filesTable = new QTableWidget(0, 2);

    filesTable->setSelectionBehavior(QAbstractItemView::SelectRows);

    QStringList labels;

    labels << tr("File Name") << tr("Size");

    filesTable->setHorizontalHeaderLabels(labels);

    filesTable->horizontalHeader()->setResizeMode(0, QHeaderView::Stretch);

    filesTable->verticalHeader()->hide();

    filesTable->setShowGrid(false);

    connect(filesTable, SIGNAL(cellActivated(int, int)),

            this, SLOT(openFileOfItem(int, int)));

}

//! [11]

//! [12]

void Window::openFileOfItem(int row, int /* column */)

{

    QTableWidgetItem *item = filesTable->item(row, 0);

    QDesktopServices::openUrl(currentDir.absoluteFilePath(item->text()));

}

//! [12]