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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 #include "dirmodel.h"

    44 #include "mainwindow.h"

    45 

    46 //! [0]

    47 MainWindow::MainWindow(QWidget *parent)

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

    49 {

    50     createMenu();

    51 

    52     QWidget *centralWidget = new QWidget;

    53 

    54     QLabel *modelLabel = new QLabel;

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

    56 

    57     modelCombo = new QComboBox;

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

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

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

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

    62     modelCombo->setCurrentIndex(0);

    63 

    64     QLabel *modeLabel = new QLabel;

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

    66     modeCombo = new QComboBox;

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

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

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

    70     modeCombo->setCurrentIndex(1);

    71 

    72     QLabel *caseLabel = new QLabel;

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

    74     caseCombo = new QComboBox;

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

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

    77     caseCombo->setCurrentIndex(0);

    78 //! [0]

    79 

    80 //! [1]

    81     QLabel *maxVisibleLabel = new QLabel;

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

    83     maxVisibleSpinBox = new QSpinBox;

    84     maxVisibleSpinBox->setRange(3,25);

    85     maxVisibleSpinBox->setValue(10);

    86 

    87     wrapCheckBox = new QCheckBox;

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

    89     wrapCheckBox->setChecked(true);

    90 //! [1]

    91 

    92 //! [2]

    93     contentsLabel = new QLabel;

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

    95 

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

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

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

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

   100 //! [2]

   101 

   102 //! [3]

   103     lineEdit = new QLineEdit;

   104     

   105     QGridLayout *layout = new QGridLayout;

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

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

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

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

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

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

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

   113     centralWidget->setLayout(layout);

   114     setCentralWidget(centralWidget);

   115 

   116     changeModel();

   117 

   118     setWindowTitle(tr("Completer"));

   119     lineEdit->setFocus();

   120 }

   121 //! [3]

   122 

   123 //! [4]

   124 void MainWindow::createMenu()

   125 {

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

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

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

   129 

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

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

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

   133 

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

   135     fileMenu->addAction(exitAction);

   136 

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

   138     helpMenu->addAction(aboutAct);

   139     helpMenu->addAction(aboutQtAct);

   140 }

   141 //! [4]

   142 

   143 //! [5]

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

   145 {

   146     QFile file(fileName);

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

   148         return new QStringListModel(completer);

   149 //! [5]

   150 

   151 //! [6]

   152 #ifndef QT_NO_CURSOR

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

   154 #endif

   155     QStringList words;

   156 

   157     while (!file.atEnd()) {

   158         QByteArray line = file.readLine();

   159         if (!line.isEmpty())

   160             words << line.trimmed();

   161     }

   162 

   163 #ifndef QT_NO_CURSOR

   164     QApplication::restoreOverrideCursor();

   165 #endif

   166 //! [6]

   167 

   168 //! [7]

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

   170         return new QStringListModel(words, completer);

   171 //! [7]

   172 

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

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

   175 //! [8]

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

   177 //! [8] //! [9]

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

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

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

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

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

   183         m->setData(countryIdx, country);

   184         m->setData(symbolIdx, symbol);

   185     }

   186 

   187     return m;

   188 }

   189 //! [9]

   190 

   191 //! [10]

   192 void MainWindow::changeMode(int index)

   193 {

   194     QCompleter::CompletionMode mode;

   195     if (index == 0)

   196         mode = QCompleter::InlineCompletion;

   197     else if (index == 1)

   198         mode = QCompleter::PopupCompletion;

   199     else

   200         mode = QCompleter::UnfilteredPopupCompletion;

   201 

   202     completer->setCompletionMode(mode);

   203 }

   204 //! [10]

   205 

   206 void MainWindow::changeCase(int cs)

   207 {

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

   209 }

   210 

   211 //! [11]

   212 void MainWindow::changeModel()

   213 {

   214     delete completer;

   215     completer = new QCompleter(this);

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

   217 

   218     switch (modelCombo->currentIndex()) {

   219     default:

   220     case 0:

   221         { // Unsorted QDirModel

   222             QDirModel *dirModel = new QDirModel(completer);

   223             completer->setModel(dirModel);

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

   225         }

   226         break;

   227 //! [11] //! [12]

   228     case 1:

   229         { // DirModel that shows full paths

   230             DirModel *dirModel = new DirModel(completer);

   231             completer->setModel(dirModel);

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

   233         }

   234         break;

   235 //! [12] //! [13]

   236     case 2:

   237         { // Country List

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

   239             QTreeView *treeView = new QTreeView;

   240             completer->setPopup(treeView);

   241             treeView->setRootIsDecorated(false);

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

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

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

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

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

   247         }

   248         break;

   249 //! [13] //! [14]

   250     case 3:

   251         { // Word list

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

   253             completer->setModelSorting(QCompleter::CaseInsensitivelySortedModel);

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

   255         }

   256         break;

   257     }

   258 

   259     changeMode(modeCombo->currentIndex());

   260     changeCase(caseCombo->currentIndex());

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

   262     lineEdit->setCompleter(completer);

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

   264 }

   265 //! [14]

   266 

   267 //! [15]

   268 void MainWindow::changeMaxVisible(int max)

   269 {

   270     completer->setMaxVisibleItems(max);

   271 }

   272 //! [15]

   273 

   274 //! [16]

   275 void MainWindow::about()

   276 {

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

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

   279 }

   280 //! [16]