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Description
Describe the bug
If a Toga textual app does not define any window content, the app will crash.
❯ TOGA_BACKEND=toga_textual \
python -c 'import toga; toga.App(formal_name="MyApp", app_id="MyApp").main_loop()'
╭───────────────────────────────────────────────────────────────── Traceback (most recent call last) ─────────────────────────────────────────────────────────────────╮
│ /home/russell/github/beeware/toga/textual/src/toga_textual/window.py:111 in on_resize │
│ │
│ 108 │ │ self.impl = impl │
│ 109 │ │
│ 110 │ def on_resize(self, event) -> None: │
│ ❱ 111 │ │ self.interface.content.refresh() │
│ 112 │
│ 113 │
│ 114 class Window: │
│ │
│ ╭───────────────────────────────────────── locals ─────────────────────────────────────────╮ │
│ │ event = Resize(size=Size(width=167, height=43), virtual_size=Size(width=167, height=43)) │ │
│ │ self = TogaMainWindow() │ │
│ ╰──────────────────────────────────────────────────────────────────────────────────────────╯ │
╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
AttributeError: 'NoneType' object has no attribute 'refresh'
Steps to reproduce
Run this app:
TOGA_BACKEND=toga_textual \
python -c 'import toga; toga.App(formal_name="MyApp", app_id="MyApp").main_loop()'
Windows:
$env:TOGA_BACKEND="toga_textual"
python -c 'import toga; toga.App(formal_name="MyApp", app_id="MyApp").main_loop()'
Expected behavior
Apps using the textual backend are not required to use window content.
Screenshots
No response
Environment
- Operating System: all
- Python version:
- Software versions:
- Briefcase:
0.3.20.dev192+g32f529a4 - Toga:
0.4.7.dev43+g63480d545
- Briefcase:
Logs
No response
Additional context
No response