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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #include "mainwindow.h" |
| #include "mimetypemodel.h" |
| |
| #include <QAction> |
| #include <QApplication> |
| #include <QFileDialog> |
| #include <QInputDialog> |
| #include <QMenu> |
| #include <QMenuBar> |
| #include <QMessageBox> |
| #include <QPlainTextEdit> |
| #include <QSplitter> |
| #include <QStatusBar> |
| #include <QTextEdit> |
| #include <QTreeView> |
| |
| #include <QFileInfo> |
| #include <QItemSelectionModel> |
| #include <QMimeDatabase> |
| #include <QMimeType> |
| |
| MainWindow::MainWindow(QWidget *parent) |
| : QMainWindow(parent) |
| , m_model(new MimetypeModel(this)) |
| , m_treeView(new QTreeView(this)) |
| , m_detailsText(new QTextEdit(this)) |
| , m_findIndex(0) |
| { |
| setWindowTitle(tr("Qt Mime Database Browser")); |
| |
| QMenu *fileMenu = menuBar()->addMenu(tr("&File")); |
| QAction *detectFileAction = |
| fileMenu->addAction(tr("&Detect File Type..."), this, &MainWindow::detectFile); |
| detectFileAction->setShortcuts(QKeySequence::Open); |
| |
| QAction *exitAction = fileMenu->addAction(tr("E&xit"), qApp, &QApplication::closeAllWindows); |
| exitAction->setShortcuts(QKeySequence::Quit); |
| |
| QMenu *findMenu = menuBar()->addMenu(tr("&Edit")); |
| QAction *findAction = |
| findMenu->addAction(tr("&Find..."), this, &MainWindow::find); |
| findAction->setShortcuts(QKeySequence::Find); |
| m_findNextAction = findMenu->addAction(tr("Find &Next"), this, &MainWindow::findNext); |
| m_findNextAction->setShortcuts(QKeySequence::FindNext); |
| m_findPreviousAction = findMenu->addAction(tr("Find &Previous"), this, &MainWindow::findPrevious); |
| m_findPreviousAction->setShortcuts(QKeySequence::FindPrevious); |
| |
| menuBar()->addMenu(tr("&About"))->addAction(tr("&About Qt"), qApp, &QApplication::aboutQt); |
| |
| QSplitter *centralSplitter = new QSplitter(this); |
| setCentralWidget(centralSplitter); |
| m_treeView->setUniformRowHeights(true); |
| m_treeView->setModel(m_model); |
| |
| const auto items = m_model->findItems("application/octet-stream", Qt::MatchContains | Qt::MatchFixedString | Qt::MatchRecursive); |
| if (!items.isEmpty()) |
| m_treeView->expand(m_model->indexFromItem(items.constFirst())); |
| |
| connect(m_treeView->selectionModel(), &QItemSelectionModel::currentChanged, |
| this, &MainWindow::currentChanged); |
| centralSplitter->addWidget(m_treeView); |
| m_detailsText->setReadOnly(true); |
| centralSplitter->addWidget(m_detailsText); |
| |
| updateFindActions(); |
| } |
| |
| void MainWindow::currentChanged(const QModelIndex &index) |
| { |
| if (index.isValid()) |
| m_detailsText->setText(MimetypeModel::formatMimeTypeInfo(m_model->mimeType(index))); |
| else |
| m_detailsText->clear(); |
| } |
| |
| void MainWindow::selectAndGoTo(const QModelIndex &index) |
| { |
| m_treeView->scrollTo(index, QAbstractItemView::PositionAtCenter); |
| m_treeView->setCurrentIndex(index); |
| } |
| |
| void MainWindow::detectFile() |
| { |
| const QString fileName = QFileDialog::getOpenFileName(this, tr("Choose File")); |
| if (fileName.isEmpty()) |
| return; |
| QMimeDatabase mimeDatabase; |
| const QFileInfo fi(fileName); |
| const QMimeType mimeType = mimeDatabase.mimeTypeForFile(fi); |
| const QModelIndex index = mimeType.isValid() |
| ? m_model->indexForMimeType(mimeType.name()) : QModelIndex(); |
| if (index.isValid()) { |
| statusBar()->showMessage(tr("\"%1\" is of type \"%2\"").arg(fi.fileName(), mimeType.name())); |
| selectAndGoTo(index); |
| } else { |
| QMessageBox::information(this, tr("Unknown File Type"), |
| tr("The type of %1 could not be determined.") |
| .arg(QDir::toNativeSeparators(fileName))); |
| } |
| } |
| |
| void MainWindow::updateFindActions() |
| { |
| const bool findNextPreviousEnabled = m_findMatches.size() > 1; |
| m_findNextAction->setEnabled(findNextPreviousEnabled); |
| m_findPreviousAction->setEnabled(findNextPreviousEnabled); |
| } |
| |
| void MainWindow::findPrevious() |
| { |
| if (--m_findIndex < 0) |
| m_findIndex = m_findMatches.size() - 1; |
| if (m_findIndex >= 0) |
| selectAndGoTo(m_findMatches.at(m_findIndex)); |
| } |
| |
| void MainWindow::findNext() |
| { |
| if (++m_findIndex >= m_findMatches.size()) |
| m_findIndex = 0; |
| if (m_findIndex < m_findMatches.size()) |
| selectAndGoTo(m_findMatches.at(m_findIndex)); |
| } |
| |
| void MainWindow::find() |
| { |
| QInputDialog inputDialog(this); |
| inputDialog.setWindowTitle(tr("Find")); |
| inputDialog.setLabelText(tr("Text:")); |
| if (inputDialog.exec() != QDialog::Accepted) |
| return; |
| const QString value = inputDialog.textValue().trimmed(); |
| if (value.isEmpty()) |
| return; |
| |
| m_findMatches.clear(); |
| m_findIndex = 0; |
| const QList<QStandardItem *> items = |
| m_model->findItems(value, Qt::MatchContains | Qt::MatchFixedString | Qt::MatchRecursive); |
| for (const QStandardItem *item : items) |
| m_findMatches.append(m_model->indexFromItem(item)); |
| statusBar()->showMessage(tr("%n mime types match \"%1\".", 0, m_findMatches.size()).arg(value)); |
| updateFindActions(); |
| if (!m_findMatches.isEmpty()) |
| selectAndGoTo(m_findMatches.constFirst()); |
| } |