vsajip · December 18, 2022 12:37 · Dec 18, 2022
diff --git a/slow_op.py b/slow_op.py
@@ -0,0 +1,64 @@
+from __future__ import annotations
+
+import asyncio
+import datetime
+import sys
+import time
+
+from textual.app import App, ComposeResult
+from textual.containers import Container, Horizontal, Vertical
+from textual.widgets import DataTable, Footer, Label
+
+class TestApp(App):
+
+    BINDINGS = [
+        ('ctrl+t', 'test', 'Test action'),
+    ]
+
+    CSS = '''
+        .hfr {
+            height: 1fr;
+        }
+        .wfr {
+            width: 1fr;
+        }
+    '''
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self.loglabel = Label(id='logs', classes='wfr')
+        self.vertpane = Vertical(self.loglabel, id='list', classes='wfr hfr')
+        self.footer = Footer()
+        self.logs = []
+
+    def log_message(self, message):
+        now = datetime.datetime.now().isoformat()
+        self.logs.append(f'{now} {message}')
+        s = '\n'.join(self.logs)
+        self.loglabel.update(s)
+
+    def compose(self) -> ComposeResult:
+        yield Horizontal(self.vertpane)
+        yield self.footer
+
+    def perform_operation(self):
+        self.log_message('Starting operation ...')
+        def do_op():
+            time.sleep(5)
+            self.log_message('Operation finished!')
+        method = 'timer'
+        if len(sys.argv) > 1:
+            method = sys.argv[1]
+        if method == 'timer':
+            self.set_timer(0.001, do_op)
+        elif method == 'later':
+            self.call_later(do_op)
+        elif method == 'refresh':
+            self.call_after_refresh(do_op)
+        else:
+            raise ValueError(f'Unsupported method: {method}')
+
+    def action_test(self):
+        self.perform_operation()
+
+TestApp().run()