initial commit

local_file_picker.py

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+# https://github.com/zauberzeug/nicegui/blob/main/examples/local_file_picker/local_file_picker.py
+import platform
+from pathlib import Path
+
+from nicegui import events, ui
+
+
+class local_file_picker(ui.dialog):
+
+    def __init__(self, directory: str, *,
+                 upper_limit: str | None = ..., multiple: bool = False, show_hidden_files: bool = False) -> None:
+        """Local File Picker
+
+        This is a simple file picker that allows you to select a file from the local filesystem where NiceGUI is running.
+
+        :param directory: The directory to start in.
+        :param upper_limit: The directory to stop at (None: no limit, default: same as the starting directory).
+        :param multiple: Whether to allow multiple files to be selected.
+        :param show_hidden_files: Whether to show hidden files.
+        """
+        super().__init__()
+
+        self.path = Path(directory).expanduser()
+        if upper_limit is None:
+            self.upper_limit = None
+        else:
+            self.upper_limit = Path(directory if upper_limit == ... else upper_limit).expanduser()
+        self.show_hidden_files = show_hidden_files
+
+        with self, ui.card():
+            self.add_drives_toggle()
+            self.grid = ui.aggrid({
+                'columnDefs': [{'field': 'name', 'headerName': 'File'}],
+                'rowSelection': {'mode': 'multiRow' if multiple else 'singleRow'},
+            }, html_columns=[0]).classes('w-96').on('cellDoubleClicked', self.handle_double_click)
+            with ui.row().classes('w-full justify-end'):
+                ui.button('Cancel', on_click=self.close).props('outline')
+                ui.button('Ok', on_click=self._handle_ok)
+        self.update_grid()
+
+    def add_drives_toggle(self):
+        if platform.system() == 'Windows':
+            import win32api
+            drives = win32api.GetLogicalDriveStrings().split('\000')[:-1]
+            self.drives_toggle = ui.toggle(drives, value=drives[0], on_change=self.update_drive)
+
+    def update_drive(self):
+        self.path = Path(self.drives_toggle.value).expanduser()
+        self.update_grid()
+
+    def update_grid(self) -> None:
+        paths = list(self.path.glob('*'))
+        if not self.show_hidden_files:
+            paths = [p for p in paths if not p.name.startswith('.')]
+        paths.sort(key=lambda p: p.name.lower())
+        paths.sort(key=lambda p: not p.is_dir())
+
+        self.grid.options['rowData'] = [
+            {
+                'name': f'📁 <strong>{p.name}</strong>' if p.is_dir() else p.name,
+                'path': str(p),
+            }
+            for p in paths
+        ]
+        if (self.upper_limit is None and self.path != self.path.parent) or \
+                (self.upper_limit is not None and self.path != self.upper_limit):
+            self.grid.options['rowData'].insert(0, {
+                'name': '📁 <strong>..</strong>',
+                'path': str(self.path.parent),
+            })
+        self.grid.update()
+
+    def handle_double_click(self, e: events.GenericEventArguments) -> None:
+        self.path = Path(e.args['data']['path'])
+        if self.path.is_dir():
+            self.update_grid()
+        else:
+            self.submit([str(self.path)])
+
+    async def _handle_ok(self):
+        rows = await self.grid.get_selected_rows()
+        self.submit([r['path'] for r in rows])
+