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#include <QtGui>

#include "dirmodel.h"

#include "mainwindow.h"

//! [0]

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent), completer(0), lineEdit(0)

{

    createMenu();

    QWidget *centralWidget = new QWidget;

    QLabel *modelLabel = new QLabel;

    modelLabel->setText(tr("Model"));

    modelCombo = new QComboBox;

    modelCombo->addItem(tr("QDirModel"));

    modelCombo->addItem(tr("QDirModel that shows full path"));

    modelCombo->addItem(tr("Country list"));

    modelCombo->addItem(tr("Word list"));

    modelCombo->setCurrentIndex(0);

    QLabel *modeLabel = new QLabel;

    modeLabel->setText(tr("Completion Mode"));

    modeCombo = new QComboBox;

    modeCombo->addItem(tr("Inline"));

    modeCombo->addItem(tr("Filtered Popup"));

    modeCombo->addItem(tr("Unfiltered Popup"));

    modeCombo->setCurrentIndex(1);

    QLabel *caseLabel = new QLabel;

    caseLabel->setText(tr("Case Sensitivity"));

    caseCombo = new QComboBox;

    caseCombo->addItem(tr("Case Insensitive"));

    caseCombo->addItem(tr("Case Sensitive"));

    caseCombo->setCurrentIndex(0);

//! [0]

//! [1]

    QLabel *maxVisibleLabel = new QLabel;

    maxVisibleLabel->setText(tr("Max Visible Items"));

    maxVisibleSpinBox = new QSpinBox;

    maxVisibleSpinBox->setRange(3,25);

    maxVisibleSpinBox->setValue(10);

    wrapCheckBox = new QCheckBox;

    wrapCheckBox->setText(tr("Wrap around completions"));

    wrapCheckBox->setChecked(true);

//! [1]

//! [2]

    contentsLabel = new QLabel;

    contentsLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

    connect(modelCombo, SIGNAL(activated(int)), this, SLOT(changeModel()));

    connect(modeCombo, SIGNAL(activated(int)), this, SLOT(changeMode(int)));

    connect(caseCombo, SIGNAL(activated(int)), this, SLOT(changeCase(int)));

    connect(maxVisibleSpinBox, SIGNAL(valueChanged(int)), this, SLOT(changeMaxVisible(int)));

//! [2]

//! [3]

    lineEdit = new QLineEdit;

    QGridLayout *layout = new QGridLayout;

    layout->addWidget(modelLabel, 0, 0); layout->addWidget(modelCombo, 0, 1);

    layout->addWidget(modeLabel, 1, 0);  layout->addWidget(modeCombo, 1, 1);

    layout->addWidget(caseLabel, 2, 0);  layout->addWidget(caseCombo, 2, 1);

    layout->addWidget(maxVisibleLabel, 3, 0); layout->addWidget(maxVisibleSpinBox, 3, 1);

    layout->addWidget(wrapCheckBox, 4, 0);

    layout->addWidget(contentsLabel, 5, 0, 1, 2);

    layout->addWidget(lineEdit, 6, 0, 1, 2);

    centralWidget->setLayout(layout);

    setCentralWidget(centralWidget);

    changeModel();

    setWindowTitle(tr("Completer"));

    lineEdit->setFocus();

}

//! [3]

//! [4]

void MainWindow::createMenu()

{

    QAction *exitAction = new QAction(tr("Exit"), this);

    QAction *aboutAct = new QAction(tr("About"), this);

    QAction *aboutQtAct = new QAction(tr("About Qt"), this);

    connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit()));

    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));

    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));

    QMenu* fileMenu = menuBar()->addMenu(tr("File"));

    fileMenu->addAction(exitAction);

    QMenu* helpMenu = menuBar()->addMenu(tr("About"));

    helpMenu->addAction(aboutAct);

    helpMenu->addAction(aboutQtAct);

}

//! [4]

//! [5]

QAbstractItemModel *MainWindow::modelFromFile(const QString& fileName)

{

    QFile file(fileName);

    if (!file.open(QFile::ReadOnly))

        return new QStringListModel(completer);

//! [5]

//! [6]

#ifndef QT_NO_CURSOR

    QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));

#endif

    QStringList words;

    while (!file.atEnd()) {

        QByteArray line = file.readLine();

        if (!line.isEmpty())

            words << line.trimmed();

    }

#ifndef QT_NO_CURSOR

    QApplication::restoreOverrideCursor();

#endif

//! [6]

//! [7]

    if (!fileName.contains(QLatin1String("countries.txt")))

        return new QStringListModel(words, completer);

//! [7]

    // The last two chars of the countries.txt file indicate the country

    // symbol. We put that in column 2 of a standard item model

//! [8]

    QStandardItemModel *m = new QStandardItemModel(words.count(), 2, completer);

//! [8] //! [9]

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

        QModelIndex countryIdx = m->index(i, 0);

        QModelIndex symbolIdx = m->index(i, 1);

        QString country = words[i].mid(0, words[i].length() - 2).trimmed();

        QString symbol = words[i].right(2);

        m->setData(countryIdx, country);

        m->setData(symbolIdx, symbol);

    }

    return m;

}

//! [9]

//! [10]

void MainWindow::changeMode(int index)

{

    QCompleter::CompletionMode mode;

    if (index == 0)

        mode = QCompleter::InlineCompletion;

    else if (index == 1)

        mode = QCompleter::PopupCompletion;

    else

        mode = QCompleter::UnfilteredPopupCompletion;

    completer->setCompletionMode(mode);

}

//! [10]

void MainWindow::changeCase(int cs)

{

    completer->setCaseSensitivity(cs ? Qt::CaseSensitive : Qt::CaseInsensitive);

}

//! [11]

void MainWindow::changeModel()

{

    delete completer;

    completer = new QCompleter(this);

    completer->setMaxVisibleItems(maxVisibleSpinBox->value());

    switch (modelCombo->currentIndex()) {

    default:

    case 0:

        { // Unsorted QDirModel

            QDirModel *dirModel = new QDirModel(completer);

            completer->setModel(dirModel);

            contentsLabel->setText(tr("Enter file path"));

        }

        break;

//! [11] //! [12]

    case 1:

        { // DirModel that shows full paths

            DirModel *dirModel = new DirModel(completer);

            completer->setModel(dirModel);

            contentsLabel->setText(tr("Enter file path"));

        }

        break;

//! [12] //! [13]

    case 2:

        { // Country List

            completer->setModel(modelFromFile(":/resources/countries.txt"));

            QTreeView *treeView = new QTreeView;

            completer->setPopup(treeView);

            treeView->setRootIsDecorated(false);

            treeView->header()->hide();

            treeView->header()->setStretchLastSection(false);

            treeView->header()->setResizeMode(0, QHeaderView::Stretch);

            treeView->header()->setResizeMode(1, QHeaderView::ResizeToContents);

            contentsLabel->setText(tr("Enter name of your country"));

        }

        break;

//! [13] //! [14]

    case 3:

        { // Word list

            completer->setModel(modelFromFile(":/resources/wordlist.txt"));

            completer->setModelSorting(QCompleter::CaseInsensitivelySortedModel);

            contentsLabel->setText(tr("Enter a word"));

        }

        break;

    }

    changeMode(modeCombo->currentIndex());

    changeCase(caseCombo->currentIndex());

    completer->setWrapAround(wrapCheckBox->isChecked());

    lineEdit->setCompleter(completer);

    connect(wrapCheckBox, SIGNAL(clicked(bool)), completer, SLOT(setWrapAround(bool)));

}

//! [14]

//! [15]

void MainWindow::changeMaxVisible(int max)

{

    completer->setMaxVisibleItems(max);

}

//! [15]

//! [16]

void MainWindow::about()

{

    QMessageBox::about(this, tr("About"), tr("This example demonstrates the "

        "different features of the QCompleter class."));

}

//! [16]