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#include <QtCore/QDir>

#include <QtGui/QLayout>

#include <QtGui/QComboBox>

#include <QtGui/QTreeWidget>

#include <QtGui/QLayout>

#include <QtGui/QFileDialog>

#include <QtGui/QDialogButtonBox>

#include <QtGui/QToolButton>

#include <QtGui/QPushButton>

#include <QtGui/QLabel>

#include "findfiledialog.h"

#include "assistant.h"

#include "textedit.h"

//! [0]

FindFileDialog::FindFileDialog(TextEdit *editor, Assistant *assistant)

    : QDialog(editor)

{

    currentAssistant = assistant;

    currentEditor = editor;

//! [0]

    createButtons();

    createComboBoxes();

    createFilesTree();

    createLabels();

    createLayout();

    directoryComboBox->addItem(QDir::toNativeSeparators(QDir::currentPath()));

    fileNameComboBox->addItem("*");

    findFiles();

    setWindowTitle(tr("Find File"));

//! [1]

}

//! [1]

void FindFileDialog::browse()

{

    QString currentDirectory = directoryComboBox->currentText();

    QString newDirectory = QFileDialog::getExistingDirectory(this,

                               tr("Select Directory"), currentDirectory);

    if (!newDirectory.isEmpty()) {

        directoryComboBox->addItem(QDir::toNativeSeparators(newDirectory));

        directoryComboBox->setCurrentIndex(directoryComboBox->count() - 1);

        update();

    }

}

//! [2]

void FindFileDialog::help()

{

    currentAssistant->showDocumentation("filedialog.html");    

}

//! [2]

void FindFileDialog::openFile(QTreeWidgetItem *item)

{

    if (!item) {

        item = foundFilesTree->currentItem();

        if (!item)

            return;

    }

    QString fileName = item->text(0);

    QString path = directoryComboBox->currentText() + QDir::separator();

    currentEditor->setContents(path + fileName);

    close();

}

void FindFileDialog::update()

{

    findFiles();

    buttonBox->button(QDialogButtonBox::Open)->setEnabled(

            foundFilesTree->topLevelItemCount() > 0);

}

void FindFileDialog::findFiles()

{

    QRegExp filePattern(fileNameComboBox->currentText() + "*");

    filePattern.setPatternSyntax(QRegExp::Wildcard);

    QDir directory(directoryComboBox->currentText());

    QStringList allFiles = directory.entryList(QDir::Files | QDir::NoSymLinks);

    QStringList matchingFiles;

    foreach (QString file, allFiles) {

        if (filePattern.exactMatch(file))

            matchingFiles << file;

    }

    showFiles(matchingFiles);

}

void FindFileDialog::showFiles(const QStringList &files)

{

    foundFilesTree->clear();

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

        QTreeWidgetItem *item = new QTreeWidgetItem(foundFilesTree);

        item->setText(0, files[i]);

    }

    if (files.count() > 0)

        foundFilesTree->setCurrentItem(foundFilesTree->topLevelItem(0));

}

void FindFileDialog::createButtons()

{

    browseButton = new QToolButton;

    browseButton->setText(tr("..."));

    connect(browseButton, SIGNAL(clicked()), this, SLOT(browse()));

    buttonBox = new QDialogButtonBox(QDialogButtonBox::Open

                                     | QDialogButtonBox::Cancel

                                     | QDialogButtonBox::Help);

    connect(buttonBox, SIGNAL(accepted()), this, SLOT(openFile()));

    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

    connect(buttonBox, SIGNAL(helpRequested()), this, SLOT(help()));

}

void FindFileDialog::createComboBoxes()

{

    directoryComboBox = new QComboBox;

    fileNameComboBox = new QComboBox;

    fileNameComboBox->setEditable(true);

    fileNameComboBox->setSizePolicy(QSizePolicy::Expanding,

                                    QSizePolicy::Preferred);

    directoryComboBox->setMinimumContentsLength(30);

    directoryComboBox->setSizeAdjustPolicy(

            QComboBox::AdjustToMinimumContentsLength);

    directoryComboBox->setSizePolicy(QSizePolicy::Expanding,

                                     QSizePolicy::Preferred);

    connect(fileNameComboBox, SIGNAL(editTextChanged(QString)),

            this, SLOT(update()));

    connect(directoryComboBox, SIGNAL(currentIndexChanged(QString)),

            this, SLOT(update()));

}

void FindFileDialog::createFilesTree()

{

    foundFilesTree = new QTreeWidget;

    foundFilesTree->setColumnCount(1);

    foundFilesTree->setHeaderLabels(QStringList(tr("Matching Files")));

    foundFilesTree->setRootIsDecorated(false);

    foundFilesTree->setSelectionMode(QAbstractItemView::SingleSelection);

    connect(foundFilesTree, SIGNAL(itemActivated(QTreeWidgetItem*,int)),

            this, SLOT(openFile(QTreeWidgetItem*)));

}

void FindFileDialog::createLabels()

{

    directoryLabel = new QLabel(tr("Search in:"));

    fileNameLabel = new QLabel(tr("File name (including wildcards):"));

}

void FindFileDialog::createLayout()

{

    QHBoxLayout *fileLayout = new QHBoxLayout;

    fileLayout->addWidget(fileNameLabel);

    fileLayout->addWidget(fileNameComboBox);

    QHBoxLayout *directoryLayout = new QHBoxLayout;

    directoryLayout->addWidget(directoryLabel);

    directoryLayout->addWidget(directoryComboBox);

    directoryLayout->addWidget(browseButton);

    QVBoxLayout *mainLayout = new QVBoxLayout;

    mainLayout->addLayout(fileLayout);

    mainLayout->addLayout(directoryLayout);

    mainLayout->addWidget(foundFilesTree);

    mainLayout->addStretch();

    mainLayout->addWidget(buttonBox);

    setLayout(mainLayout);

}