Merge pull request #2581 from Textualize/auto-focus-improv

AUTO_FOCUS targets first focusable widget.

CHANGELOG.md

@@ -24,6 +24,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Fixed `TreeNode.toggle` and `TreeNode.toggle_all` not posting a `Tree.NodeExpanded` or `Tree.NodeCollapsed` message https://github.com/Textualize/textual/issues/2535
 - `footer--description` component class was being ignored https://github.com/Textualize/textual/issues/2544
 - Pasting empty selection in `Input` would raise an exception https://github.com/Textualize/textual/issues/2563
+- `Screen.AUTO_FOCUS` now focuses the first _focusable_ widget that matches the selector https://github.com/Textualize/textual/issues/2578
+- `Screen.AUTO_FOCUS` now works on the default screen on startup https://github.com/Textualize/textual/pull/2581
 - Fix for setting dark in App `__init__` https://github.com/Textualize/textual/issues/2583
 - Fix issue with scrolling and docks https://github.com/Textualize/textual/issues/2525
 

src/textual/app.py

@@ -2140,6 +2140,7 @@ class App(Generic[ReturnType], DOMNode):
             screen = Screen(id="_default")
             self._register(self, screen)
             self._screen_stack.append(screen)
+            screen.post_message(events.ScreenResume())
             await super().on_event(event)
 
         elif isinstance(event, events.InputEvent) and not event.is_forwarded:

src/textual/screen.py

@@ -668,15 +668,13 @@ class Screen(Generic[ScreenResultType], Widget):
         """Screen has resumed."""
         self.stack_updates += 1
         size = self.app.size
-        if self.AUTO_FOCUS is not None and self.focused is None:
-            try:
-                to_focus = self.query(self.AUTO_FOCUS).first()
-            except NoMatches:
-                pass
-            else:
-                self.set_focus(to_focus)
         self._refresh_layout(size, full=True)
         self.refresh()
+        if self.AUTO_FOCUS is not None and self.focused is None:
+            for widget in self.query(self.AUTO_FOCUS):
+                if widget.focusable:
+                    self.set_focus(widget)
+                    break
 
     def _on_screen_suspend(self) -> None:
         """Screen has suspended."""

tests/snapshot_tests/test_snapshots.py

@@ -1,5 +1,4 @@
 from pathlib import Path
-import sys
 
 import pytest
 
@@ -78,8 +77,7 @@ def test_switches(snap_compare):
 
 def test_input_and_focus(snap_compare):
     press = [
-        "tab",
-        *"Darren",  # Focus first input, write "Darren"
+        *"Darren",  # Write "Darren"
         "tab",
         *"Burns",  # Focus second input, write "Burns"
     ]
@@ -88,7 +86,7 @@ def test_input_and_focus(snap_compare):
 
 def test_buttons_render(snap_compare):
     # Testing button rendering. We press tab to focus the first button too.
-    assert snap_compare(WIDGET_EXAMPLES_DIR / "button.py", press=["tab", "tab"])
+    assert snap_compare(WIDGET_EXAMPLES_DIR / "button.py", press=["tab"])
 
 
 def test_placeholder_render(snap_compare):
@@ -189,7 +187,7 @@ def test_content_switcher_example_initial(snap_compare):
 def test_content_switcher_example_switch(snap_compare):
     assert snap_compare(
         WIDGET_EXAMPLES_DIR / "content_switcher.py",
-        press=["tab", "tab", "enter", "wait:500"],
+        press=["tab", "enter", "wait:500"],
         terminal_size=(50, 50),
     )
 
@@ -315,7 +313,7 @@ def test_programmatic_scrollbar_gutter_change(snap_compare):
 
 
 def test_borders_preview(snap_compare):
-    assert snap_compare(CLI_PREVIEWS_DIR / "borders.py", press=["tab", "enter"])
+    assert snap_compare(CLI_PREVIEWS_DIR / "borders.py", press=["enter"])
 
 
 def test_colors_preview(snap_compare):
@@ -379,9 +377,7 @@ def test_disabled_widgets(snap_compare):
 
 
 def test_focus_component_class(snap_compare):
-    assert snap_compare(
-        SNAPSHOT_APPS_DIR / "focus_component_class.py", press=["tab", "tab"]
-    )
+    assert snap_compare(SNAPSHOT_APPS_DIR / "focus_component_class.py", press=["tab"])
 
 
 def test_line_api_scrollbars(snap_compare):
@@ -442,7 +438,7 @@ def test_modal_dialog_bindings_input(snap_compare):
     # Check https://github.com/Textualize/textual/issues/2194
     assert snap_compare(
         SNAPSHOT_APPS_DIR / "modal_screen_bindings.py",
-        press=["enter", "tab", "h", "!", "left", "i", "tab"],
+        press=["enter", "h", "!", "left", "i", "tab"],
     )
 
 
@@ -518,6 +514,5 @@ def test_select_rebuild(snap_compare):
     # https://github.com/Textualize/textual/issues/2557
     assert snap_compare(
         SNAPSHOT_APPS_DIR / "select_rebuild.py",
-        press=["tab", "space", "escape", "tab", "enter", "tab", "space"]
+        press=["space", "escape", "tab", "enter", "tab", "space"],
     )
-

tests/test_app.py

@@ -1,5 +1,5 @@
 from textual.app import App, ComposeResult
-from textual.widgets import Button
+from textual.widgets import Button, Input
 
 
 def test_batch_update():
@@ -20,6 +20,7 @@ def test_batch_update():
 
 class MyApp(App):
     def compose(self) -> ComposeResult:
+        yield Input()
         yield Button("Click me!")
 
 

tests/test_on.py

@@ -36,7 +36,7 @@ async def test_on_button_pressed() -> None:
 
     app = ButtonApp()
     async with app.run_test() as pilot:
-        await pilot.press("tab", "enter", "tab", "enter", "tab", "enter")
+        await pilot.press("enter", "tab", "enter", "tab", "enter")
         await pilot.pause()
 
     assert pressed == [

tests/test_paste.py

@@ -38,6 +38,7 @@ async def test_empty_paste():
 
     app = PasteApp()
     async with app.run_test() as pilot:
+        app.set_focus(None)
         await pilot.press("p")
         assert app.query_one(MyInput).value == ""
         assert len(paste_events) == 1

tests/test_screens.py

@@ -6,7 +6,7 @@ import pytest
 
 from textual.app import App, ScreenStackError
 from textual.screen import Screen
-from textual.widgets import Button, Input
+from textual.widgets import Button, Input, Label
 
 skip_py310 = pytest.mark.skipif(
     sys.version_info.minor == 10 and sys.version_info.major == 3,
@@ -155,8 +155,7 @@ async def test_screens():
 
 async def test_auto_focus():
     class MyScreen(Screen[None]):
-        def compose(self) -> None:
-            print("composing")
+        def compose(self):
             yield Button()
             yield Input(id="one")
             yield Input(id="two")
@@ -194,6 +193,22 @@ async def test_auto_focus():
         assert app.focused.id == "two"
 
 
+async def test_auto_focus_skips_non_focusable_widgets():
+    class MyScreen(Screen[None]):
+        def compose(self):
+            yield Label()
+            yield Button()
+
+    class MyApp(App[None]):
+        def on_mount(self):
+            self.push_screen(MyScreen())
+
+    app = MyApp()
+    async with app.run_test():
+        assert app.focused is not None
+        assert isinstance(app.focused, Button)
+
+
 async def test_dismiss_non_top_screen():
     class MyApp(App[None]):
         async def key_p(self) -> None:

tests/toggles/test_radioset.py

@@ -39,6 +39,7 @@ async def test_radio_sets_initial_state():
 async def test_click_sets_focus():
     """Clicking within a radio set should set focus."""
     async with RadioSetApp().run_test() as pilot:
+        pilot.app.set_focus(None)
         assert pilot.app.screen.focused is None
         await pilot.click("#clickme")
         assert pilot.app.screen.focused == pilot.app.query_one("#from_buttons")
@@ -72,8 +73,6 @@ async def test_radioset_same_button_mash():
 async def test_radioset_inner_navigation():
     """Using the cursor keys should navigate between buttons in a set."""
     async with RadioSetApp().run_test() as pilot:
-        assert pilot.app.screen.focused is None
-        await pilot.press("tab")
         for key, landing in (
             ("down", 1),
             ("up", 0),
@@ -88,8 +87,6 @@ async def test_radioset_inner_navigation():
                 == pilot.app.query_one("#from_buttons").children[landing]
             )
     async with RadioSetApp().run_test() as pilot:
-        assert pilot.app.screen.focused is None
-        await pilot.press("tab")
         assert pilot.app.screen.focused is pilot.app.screen.query_one("#from_buttons")
         await pilot.press("tab")
         assert pilot.app.screen.focused is pilot.app.screen.query_one("#from_strings")
@@ -101,8 +98,6 @@ async def test_radioset_inner_navigation():
 async def test_radioset_breakout_navigation():
     """Shift/Tabbing while in a radioset should move to the previous/next focsuable after the set itself."""
     async with RadioSetApp().run_test() as pilot:
-        assert pilot.app.screen.focused is None
-        await pilot.press("tab")
         assert pilot.app.screen.focused is pilot.app.query_one("#from_buttons")
         await pilot.press("tab")
         assert pilot.app.screen.focused is pilot.app.query_one("#from_strings")