Add the dirview example

This works after changing Enum to allow missing values.

Pick-to: 6.3 6.2
Task-number: PYSIDE-841
Change-Id: I29f145280a19a06a9586c4f240a22dc2a7b2fe19
Reviewed-by: Christian Tismer <tismer@stackless.com>

3 files changed, 68 insertions, 0 deletions

diff --git a/examples/widgets/itemviews/dirview/dirview.py b/examples/widgets/itemviews/dirview/dirview.py
new file mode 100644
index 000000000..aa1e62185
--- /dev/null
+++ b/examples/widgets/itemviews/dirview/dirview.py
@@ -0,0 +1,60 @@
+# Copyright (C) 2020 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+import sys
+from argparse import ArgumentParser, RawTextHelpFormatter
+
+from PySide6.QtWidgets import (QApplication, QFileSystemModel,
+                               QFileIconProvider, QScroller, QTreeView)
+from PySide6.QtCore import QDir
+
+"""PySide6 port of the widgets/itemviews/dirview example from Qt v6.x"""
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+
+    name = "Dir View"
+    argument_parser = ArgumentParser(description=name,
+                                     formatter_class=RawTextHelpFormatter)
+    argument_parser.add_argument("--no-custom", "-c", action="store_true",
+                                 help="Set QFileSystemModel.DontUseCustomDirectoryIcons")
+    argument_parser.add_argument("--no-watch", "-w", action="store_true",
+                                 help="Set QFileSystemModel.DontWatch")
+    argument_parser.add_argument("directory",
+                                 help="The directory to start in.",
+                                 nargs='?', type=str)
+    options = argument_parser.parse_args()
+    root_path = options.directory
+
+    model = QFileSystemModel()
+    icon_provider = QFileIconProvider()
+    model.setIconProvider(icon_provider)
+    model.setRootPath("")
+    if options.no_custom:
+        model.setOption(QFileSystemModel.DontUseCustomDirectoryIcons)
+    if options.no_watch:
+        model.setOption(QFileSystemModel.DontWatchForChanges)
+    tree = QTreeView()
+    tree.setModel(model)
+    if root_path:
+        root_index = model.index(QDir.cleanPath(root_path))
+        if root_index.isValid():
+            tree.setRootIndex(root_index)
+
+    # Demonstrating look and feel features
+    tree.setAnimated(False)
+    tree.setIndentation(20)
+    tree.setSortingEnabled(True)
+    availableSize = tree.screen().availableGeometry().size()
+    tree.resize(availableSize / 2)
+    tree.setColumnWidth(0, tree.width() / 3)
+
+    # Make it flickable on touchscreens
+    QScroller.grabGesture(tree, QScroller.ScrollerGestureType.TouchGesture)
+
+    tree.setWindowTitle(name)
+    tree.show()
+
+    sys.exit(app.exec())
+
diff --git a/examples/widgets/itemviews/dirview/dirview.pyproject b/examples/widgets/itemviews/dirview/dirview.pyproject
new file mode 100644
index 000000000..9470083c9
--- /dev/null
+++ b/examples/widgets/itemviews/dirview/dirview.pyproject
@@ -0,0 +1,3 @@
+{
+    "files": ["dirview.py"]
+}
diff --git a/examples/widgets/itemviews/dirview/doc/dirview.rst b/examples/widgets/itemviews/dirview/doc/dirview.rst
new file mode 100644
index 000000000..7044fdf58
--- /dev/null
+++ b/examples/widgets/itemviews/dirview/doc/dirview.rst
@@ -0,0 +1,5 @@
+Dir View Example
+================
+
+The Dir View example shows a tree view of the local file system. It uses the
+QFileSystemModel class to provide file and directory information.