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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#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::quit);
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());
}
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