Resize DataTable columns to fit smaller column content #6247
Description
Continued from #6246.
When using DataTable to show rows it resize table column only when adding rows for the first time. If I then clear table and add rows with smaller content length, table will still have long columns.
Code example:
from textual.app import App, ComposeResult
from textual.widgets import Button, DataTable
class TableApp(App):
def compose(self) -> ComposeResult:
yield Button('Clear table and add short lines')
yield DataTable()
def on_mount(self) -> None:
table = self.query_one(DataTable)
table.add_columns('1', '2', '3', '4' )
table.add_row('1', '2', '3', 20 * 'long line')
def on_button_pressed(self, event: Button.Pressed) -> None:
table = self.query_one(DataTable)
table.clear()
table.add_row('1', '2', '3', 'short line')
app = TableApp()
if __name__ == "__main__":
app.run()Initial layout (when long rows added) - OK:
After clean and add small rows - still have scrollbar:
Textual Diagnostics
Versions
| Name | Value |
|---|---|
| Textual | 6.6.0 |
| Rich | 14.2.0 |
Python
| Name | Value |
|---|---|
| Version | 3.12.3 |
| Implementation | CPython |
| Compiler | GCC 13.3.0 |
| Executable | /home/anlar/dev/anlar/tewi/venv/bin/python3 |
Operating System
| Name | Value |
|---|---|
| System | Linux |
| Release | 6.14.0-36-generic |
| Version | #36~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Oct 15 15:45:17 UTC 2 |
Terminal
| Name | Value |
|---|---|
| Terminal Application | tmux (3.4) |
| TERM | tmux-256color |
| COLORTERM | truecolor |
| FORCE_COLOR | Not set |
| NO_COLOR | Not set |
Rich Console options
| Name | Value |
|---|---|
| size | width=173, height=40 |
| legacy_windows | False |
| min_width | 1 |
| max_width | 173 |
| is_terminal | True |
| encoding | utf-8 |
| max_height | 40 |
| justify | None |
| overflow | None |
| no_wrap | False |
| highlight | None |
| markup | None |
| height | None |