Set Tabulator to render into explicit popup container

panel/models/tabulator.ts

@@ -824,6 +824,7 @@ export class DataTabulatorView extends HTMLBoxView {
       paginationMode: this.model.pagination,
       paginationSize: this.model.page_size || 20,
       paginationInitialPage: 1,
+      popupContainer: this.container,
       groupBy: this.groupBy,
       frozenRows: (row: any) => {
         return (this.model.frozen_rows.length > 0) ? this.model.frozen_rows.includes(row._row.data._index) : false
@@ -1152,6 +1153,9 @@ export class DataTabulatorView extends HTMLBoxView {
       }
       columns.push(button_column)
     }
+    // We insert an empty last column to ensure select editor is rendered in correct position
+    // see: https://github.com/holoviz/panel/issues/7295
+    columns.push({width: 1, maxWidth: 1, minWidth: 1, resizable: false, cssClass: "empty", sorter: null})
     return columns
   }
 

panel/styles/models/tabulator.less

@@ -4,4 +4,20 @@
   .tabulator-row .row-content .bk-panel-models-markup-HTML {
     white-space: normal;
   }
+
+  .tabulator-cell.empty {
+    width: 0px !important;
+    padding: 0px !important
+  }
+}
+
+.tabulator-header {
+  .tabulator-col.empty {
+    min-width: 0px !important;
+    width: 0px !important;
+    border-right: unset !important;
+    .tabulator-col-content {
+      padding: 0px !important;
+    }
+  }
 }

panel/tests/ui/io/test_convert.py

@@ -250,9 +250,9 @@ def test_pyodide_test_convert_csv_app(http_serve, page, runtime, http_patch):
     expected_titles = ['index', 'date', 'Temperature', 'Humidity', 'Light', 'CO2', 'HumidityRatio', 'Occupancy']
 
     titles = page.locator('.tabulator-col-title')
-    expect(titles).to_have_count(1 + len(expected_titles), timeout=60 * 1000)
+    expect(titles).to_have_count(2 + len(expected_titles), timeout=60 * 1000)
     titles = titles.all_text_contents()
-    assert titles[1:] == expected_titles
+    assert titles[1:-1] == expected_titles
 
     assert [msg for msg in msgs if msg.type == 'error' and 'favicon' not in msg.location['url']] == []
 

panel/tests/ui/widgets/test_tabulator.py

@@ -114,7 +114,7 @@
 
     serve_component(page, widget)
 
-    expected_ncols = ncols + 2  # _index + index + data columns
+    expected_ncols = ncols + 3  # _index + index + data columns + empty
 
     # Check that the whole table content is on the page
     table = page.locator('.pnx-tabulator.tabulator')
@@ -234,13 +234,13 @@
 
     serve_component(page, widget)
 
-    expected_ncols = ncols + 3  # _index + index + data columns + button col
+    expected_ncols = ncols + 4  # _index + index + data columns + button col + empty
 
     # Check that an additional column has been added to the table
     # with no header title
     cols = page.locator(".tabulator-col")
     expect(cols).to_have_count(expected_ncols)
-    button_col_idx = expected_ncols - 1
+    button_col_idx = expected_ncols - 2
     assert not cols.nth(button_col_idx).get_attribute('tabulator-field')
     assert cols.nth(button_col_idx).inner_text() == '\xa0'
     assert cols.nth(button_col_idx).is_visible()
@@ -704,20 +704,20 @@
     val = ['red', 'blue']
     for v in val:
         item = page.locator(f'.tabulator-edit-list-item:has-text("{v}")')
-        item.click()
+        item.evaluate("el => el.click()")
     # Validating the filters doesn't have a very nice behavior, you need to lose
     # focus on the multiselect by clicking somewhere else.
     # Delay required before clicking for the focus to be lost and the filters accounted for.
     page.wait_for_timeout(200)
-    page.locator('text="foo1"').click()
+    page.locator('text="foo1"').click(force=True)
 
     cell.click()
     val = ['red', 'blue']
     for v in val:
         item = page.locator(f'.tabulator-edit-list-item:has-text("{v}")')
-        item.click()
+        item.evaluate("el => el.click()")
     page.wait_for_timeout(200)
-    page.locator('text="foo1"').click()
+    page.locator('text="foo1"').click(force=True)
 
     assert not exception_handler_accumulator
 
@@ -747,13 +747,13 @@
     cells.nth(0).click()
     item = page.locator('.tabulator-edit-list-item', has_text=opt0)
     expect(item).to_have_count(1)
-    item.click()
+    item.click(force=True)
 
     # Change the 1th column
     cells.nth(1).click()
     item = page.locator('.tabulator-edit-list-item', has_text=opt1)
     expect(item).to_have_count(1)
-    item.click()
+    item.click(force=True)
 
     # Check the last column matches
     cells.nth(2).click()
@@ -2352,7 +2352,7 @@
     state.add_periodic_callback(stream_data, period=100, count=repetitions)
 
     # Wait until data is updated
     wait_until(lambda: len(widget.value) == nrows1 + repetitions * nrows2, page)
 
     # Explicit wait to make sure the periodic callback has propagated
     page.wait_for_timeout(500)