Implement j/k navigation, clearing DataTable and getting current cell value

App.py

@@ -1,19 +1,46 @@
 from textual.containers import Container, Vertical
 from textual.app import ComposeResult, App
 from textual.widgets import Static, Header, DataTable
+from textual.widget import Widget
 
 
-class FeedPane(Vertical):
+class FeedPane(Widget):
-    def __init__(self, content):
+    def __init__(self):
         super().__init__()
-        self.content = content
         self.id = "feed-pane"
 
-    def add(self, e):
+    def add(self, content):
-        self.content.append(e)
+        table = self.query_one(DataTable)
+        table.add_rows([[item] for item in content])
+
+    def addColumn(self, title):
+        table = self.query_one(DataTable)
+        table.add_column(title, width=60)
+
+    def clear(self):
+        table = self.query_one(DataTable)
+        table.data = {}
+        table.rows = {}
+        table.row_count = 0
+        table._line_no = 0
+        table._y_offsets = []
+        table._new_rows = set()
+        table._clear_caches()
+        table._require_update_dimensions = True
+        table.check_idle()
+
+    def currentValue(self):
+        table = self.query_one(DataTable)
+        row_num = table.cursor_cell.row
+        column_num = table.cursor_cell.column
+        return table.data[row_num][column_num]
+
+    def focus(self):
+        table = self.query_one(DataTable)
+        table.focus()
 
     def compose(self):
-        yield Vertical(*self.content, id="left-container")
+        yield DataTable(id="feeds_table")
 
 
 class FeedItem(Static):
@@ -34,36 +61,30 @@ class GUI(App):
 
     def __init__(self):
         super().__init__()
-        self.i = 0
 
     def on_key(self, event):
-        # item = self.query(FeedItem)[self.i]
-        # item.set_styles("color: auto;")
         if event.key == "j":
-            self.i += 1
+            pane = self.query_one(DataTable)
+            pane.key_down(event)
         elif event.key == "k":
-            self.i -= 1
-        elif event.key == "r":
             pane = self.query_one(DataTable)
-            pane.data = {}
+            pane.key_up(event)
-            pane.row_count = 0
-            pane._line_no = 0
-            pane._y_offsets = []
-            pane._require_update_dimensions = True
-            pane.check_idle()
         elif event.key == "a":
-            pane = self.query_one(DataTable)
+            pane = self.query_one(FeedPane)
-            pane.add_rows([["XXX"]])
+            pane.add(["XXX"])
+        elif event.key == "r":
+            pane = self.query_one(FeedPane)
+            pane.clear()
+        elif event.key == "space":
+            pane = self.query_one(FeedPane)
+            pane.add([pane.currentValue()])
         else:
             pass
-        # item = self.query(FeedItem)[self.i]
-        # item.set_styles("color: blue;")
 
     def compose(self) -> ComposeResult:
         yield Header()
         yield Container(
-            # FeedPane([FeedItem(f"Feed# {number}", number) for number in range(15)]),
+            FeedPane(),
-            DataTable(),
             Vertical(
                 *[Static("Horizontally"),
                   Static("Positioned"),
@@ -75,11 +96,12 @@ class GUI(App):
         )
 
     def on_mount(self):
-        dt = self.query_one(DataTable)
+        fp = self.query_one(FeedPane)
-        dt.add_column("Feeds", width = 60)
+        fp.addColumn("Feeds")
-        # dt.add_rows([[FeedItem(f"Feed# {number}", number)] for number in range(15)])
+        fp.add(["Feed#" + str(number) for number in range(15)])
-        dt.add_rows([[str(number)] for number in range(15)])
+        # fp.add_rows([[FeedItem(f"Feed# {number}", number)] for number in range(15)])
-        dt.focus()
+        fp.focus()
+
 
 if __name__ == "__main__":
     app = GUI()