1 files changed, 89 insertions, 0 deletions
diff --git a/examples/quickcontrols/filesystemexplorer/filesystemmodel.cpp b/examples/quickcontrols/filesystemexplorer/filesystemmodel.cpp
new file mode 100644
index 0000000000..b580bced05
--- /dev/null
+++ b/examples/quickcontrols/filesystemexplorer/filesystemmodel.cpp
@@ -0,0 +1,89 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "filesystemmodel.h"
+
+#include <QStandardPaths>
+#include <QMimeDatabase>
+#include <QTextDocument>
+#include <QTextObject>
+
+FileSystemModel::FileSystemModel(QObject *parent) : QFileSystemModel(parent)
+{
+    setFilter(QDir::AllEntries | QDir::Hidden | QDir::NoDotAndDotDot);
+    setInitialDirectory();
+}
+
+QString FileSystemModel::readFile(const QString &filePath)
+{
+    // Don't issue errors for an empty path, as the initial binding
+    // will result in an empty path, and that's OK.
+    if (filePath.isEmpty())
+        return {};
+
+    QFile file(filePath);
+
+    if (file.size() >= 2'000'000)
+        return tr("File size is too big.\nYou can read files up to %1 MB.").arg(2);
+
+    static const QMimeDatabase db;
+    const QMimeType mime = db.mimeTypeForFile(QFileInfo(file));
+
+    // Check if the mimetype is supported and return the content.
+    const auto mimeTypesForFile = mime.parentMimeTypes();
+    for (const auto &m : mimeTypesForFile) {
+        if (m.contains("text", Qt::CaseInsensitive)
+                || mime.comment().contains("text", Qt::CaseInsensitive)) {
+            if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
+                return tr("Error opening the File!");
+
+            QTextStream stream(&file);
+            return stream.readAll();
+        }
+    }
+    return tr("Filetype not supported!");
+}
+
+// This function gets called from Editor.qml
+int FileSystemModel::currentLineNumber(QQuickTextDocument *textDocument, int cursorPosition)
+{
+    if (QTextDocument *td = textDocument->textDocument()) {
+        QTextBlock tb = td->findBlock(cursorPosition);
+        return tb.blockNumber();
+    }
+    return -1;
+}
+
+int FileSystemModel::columnCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent)
+    return 1;
+}
+
+QModelIndex FileSystemModel::rootIndex() const
+{
+    return m_rootIndex;
+}
+
+void FileSystemModel::setRootIndex(const QModelIndex index)
+{
+    if (index == m_rootIndex)
+        return;
+    m_rootIndex = index;
+    emit rootIndexChanged();
+}
+
+void FileSystemModel::setInitialDirectory(const QString &path)
+{
+    QDir dir(path);
+    if (dir.makeAbsolute())
+        setRootPath(dir.path());
+    else
+        setRootPath(getDefaultRootDir());
+    setRootIndex(QFileSystemModel::index(dir.path(), 0));
+}
+
+QString FileSystemModel::getDefaultRootDir()
+{
+    return QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
+}