feat(api): Deprecate panel_well() in favor of card()

CHANGELOG.md

@@ -35,6 +35,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Added module support for `session.clientdata` methods. This allows you to access client data values in Shiny modules without needing to namespace the keys explicitly. (#1978)
 
+* Fixed false positive warning in `layout_columns()` about number of widths vs elements. (#1704)
+
 ### Bug fixes
 
 * Fixed an issue with `ui.Chat()` sometimes wanting to scroll a parent element. (#1996)
@@ -45,6 +47,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Fixed `set()` method of `InputSelectize` controller so it clears existing selections before applying new values. (#2024)
 
+### Deprecations
+
+* `ui.panel_well()` is deprecated in favor of `ui.card()`. (#2038)
+
 
 ## [1.4.0] - 2025-04-08
 

docs/_quartodoc-core.yml

@@ -94,7 +94,6 @@ quartodoc:
         - ui.panel_fixed
         - ui.panel_conditional
         - ui.panel_title
-        - ui.panel_well
     - title: Uploads & downloads
       desc: Allow users to upload and download files.
       contents:

docs/_quartodoc-express.yml

@@ -160,7 +160,6 @@ quartodoc:
         - express.ui.panel_absolute
         - express.ui.panel_fixed
         - express.ui.panel_title
-        - express.ui.panel_well
     - title: Uploads & downloads
       desc: Allow users to upload and download files.
       contents:

examples/airmass/app.py

@@ -14,45 +14,37 @@
 
 from shiny import App, Inputs, Outputs, Session, reactive, render, req, ui
 
-app_ui = ui.page_fixed(
-    ui.tags.h3("Air mass calculator"),
-    ui.div(
+app_ui = ui.page_fillable(
+    ui.tags.h2("Air mass calculator", {"class": "lead display-6 text-center"}),
+    ui.layout_columns(
         ui.markdown(
             """This Shiny app uses [Astropy](https://www.astropy.org/) to calculate the
-            altitude (degrees above the horizon) and airmass (the amount of atmospheric
-            air along your line of sight to an object) of one or more astronomical
-            objects, over a given evening, at a given geographic location.
-            """
+        altitude (degrees above the horizon) and airmass (the amount of atmospheric
+        air along your line of sight to an object) of one or more astronomical
+        objects, over a given evening, at a given geographic location.
+        """
         ),
-        class_="mb-5",
-    ),
-    ui.row(
-        ui.column(
-            8,
+        ui.card(
             ui.output_ui("timeinfo"),
-            ui.output_plot("plot", height="800px"),
+            ui.output_plot("plot", height="600px"),
             # For debugging
             # ui.output_table("table"),
-            class_="order-2 order-sm-1",
         ),
-        ui.column(
-            4,
-            ui.panel_well(
-                ui.input_date("date", "Date"),
-                class_="pb-1 mb-3",
-            ),
-            ui.panel_well(
+        ui.TagList(
+            ui.card(ui.input_date("date", "Date"), fill=False),
+            ui.card(
                 ui.input_text_area(
-                    "objects", "Target object(s)", "M1, NGC35, PLX299", rows=3
+                    "objects",
+                    "Target object(s)",
+                    "M1, NGC35, PLX299",
+                    rows=2,
                 ),
-                class_="pb-1 mb-3",
-            ),
-            ui.panel_well(
-                location_ui("location"),
-                class_="mb-3",
+                fill=False,
             ),
-            class_="order-1 order-sm-2",
+            ui.card(location_ui("location")),
         ),
+        col_widths=[-2, 8, -2, -1, 7, 3, -1],
+        min_height="600px",
     ),
 )
 

examples/inputs-update/app.py

@@ -4,78 +4,70 @@
 
 app_ui = ui.page_fluid(
     ui.panel_title("Changing the values of inputs from the server"),
-    ui.row(
-        ui.column(
-            4,
-            ui.panel_well(
-                ui.tags.h4("These inputs control the other inputs on the page"),
-                ui.input_text(
-                    "control_label", "This controls some of the labels:", "LABEL TEXT"
-                ),
-                ui.input_slider(
-                    "control_num", "This controls values:", min=1, max=20, value=15
-                ),
+    ui.layout_columns(
+        ui.card(
+            ui.card_header("These inputs control the other inputs on the page"),
+            ui.input_text(
+                "control_label", "This controls some of the labels:", "LABEL TEXT"
+            ),
+            ui.input_slider(
+                "control_num", "This controls values:", min=1, max=20, value=15
             ),
         ),
-        ui.column(
-            4,
-            ui.panel_well(
-                ui.tags.h4("These inputs are controlled by the other inputs"),
-                ui.input_text("inText", "Text input:", value="start text"),
-                ui.input_numeric(
-                    "inNumber", "Number input:", min=1, max=20, value=5, step=0.5
-                ),
-                ui.input_numeric(
-                    "inNumber2", "Number input 2:", min=1, max=20, value=5, step=0.5
-                ),
-                ui.input_slider("inSlider", "Slider input:", min=1, max=20, value=15),
-                ui.input_slider(
-                    "inSlider2", "Slider input 2:", min=1, max=20, value=(5, 15)
-                ),
-                ui.input_slider(
-                    "inSlider3", "Slider input 3:", min=1, max=20, value=(5, 15)
-                ),
-                ui.input_date("inDate", "Date input:"),
-                ui.input_date_range("inDateRange", "Date range input:"),
+        ui.card(
+            ui.card_header("These inputs are controlled by the other inputs"),
+            ui.input_text("inText", "Text input:", value="start text"),
+            ui.input_numeric(
+                "inNumber", "Number input:", min=1, max=20, value=5, step=0.5
+            ),
+            ui.input_numeric(
+                "inNumber2", "Number input 2:", min=1, max=20, value=5, step=0.5
+            ),
+            ui.input_slider("inSlider", "Slider input:", min=1, max=20, value=15),
+            ui.input_slider(
+                "inSlider2", "Slider input 2:", min=1, max=20, value=(5, 15)
+            ),
+            ui.input_slider(
+                "inSlider3", "Slider input 3:", min=1, max=20, value=(5, 15)
             ),
+            ui.input_date("inDate", "Date input:"),
+            ui.input_date_range("inDateRange", "Date range input:"),
         ),
-        ui.column(
-            4,
-            ui.panel_well(
-                ui.input_checkbox("inCheckbox", "Checkbox input", value=False),
-                ui.input_checkbox_group(
-                    "inCheckboxGroup",
-                    "Checkbox group input:",
-                    {
-                        "option1": "label 1",
-                        "option2": "label 2",
-                    },
-                ),
-                ui.input_radio_buttons(
-                    "inRadio",
-                    "Radio buttons:",
-                    {
-                        "option1": "label 1",
-                        "option2": "label 2",
-                    },
-                ),
-                ui.input_select(
-                    "inSelect",
-                    "Select input:",
-                    {
-                        "option1": "label 1",
-                        "option2": "label 2",
-                    },
-                ),
-                ui.input_select(
-                    "inSelect2",
-                    "Select input 2:",
-                    {
-                        "option1": "label 1",
-                        "option2": "label 2",
-                    },
-                    multiple=True,
-                ),
+        ui.card(
+            ui.card_header("These inputs are updated by the server"),
+            ui.input_checkbox("inCheckbox", "Checkbox input", value=False),
+            ui.input_checkbox_group(
+                "inCheckboxGroup",
+                "Checkbox group input:",
+                {
+                    "option1": "label 1",
+                    "option2": "label 2",
+                },
+            ),
+            ui.input_radio_buttons(
+                "inRadio",
+                "Radio buttons:",
+                {
+                    "option1": "label 1",
+                    "option2": "label 2",
+                },
+            ),
+            ui.input_select(
+                "inSelect",
+                "Select input:",
+                {
+                    "option1": "label 1",
+                    "option2": "label 2",
+                },
+            ),
+            ui.input_select(
+                "inSelect2",
+                "Select input 2:",
+                {
+                    "option1": "label 1",
+                    "option2": "label 2",
+                },
+                multiple=True,
             ),
             ui.navset_tab(
                 ui.nav_panel("panel1", ui.h2("This is the first panel.")),

shiny/api-examples/panel_absolute/app-core.py

@@ -3,8 +3,9 @@
 app_ui = ui.page_fluid(
     ui.panel_title("A basic absolute panel example", "Demo"),
     ui.panel_absolute(
-        ui.panel_well(
-            "Drag me around!", ui.input_slider("n", "N", min=0, max=100, value=20)
+        ui.card(
+            ui.card_header("Drag me around!"),
+            ui.input_slider("n", "N", min=0, max=100, value=20),
         ),
         draggable=True,
         width="300px",

shiny/api-examples/panel_absolute/app-express.py

@@ -3,6 +3,6 @@
 ui.h2("A basic absolute panel example")
 
 with ui.panel_absolute(draggable=True, width="300px", right="50px", top="25%"):
-    with ui.panel_well():
-        "Drag me around!"
+    with ui.card():
+        ui.card_header("Drag me around!")
         ui.input_slider("n", "N", min=0, max=100, value=20)

shiny/express/ui/_cm_components.py

@@ -7,6 +7,7 @@
 from htmltools import Tag, TagAttrs, TagAttrValue, TagChild, TagFunction, TagList
 
 from ... import ui
+from ..._deprecated import warn_deprecated
 from ..._docstring import add_example, no_example
 from ...types import DEPRECATED, MISSING, MISSING_TYPE
 from ...ui._accordion import AccordionPanel
@@ -1363,13 +1364,9 @@ def value_box(
 @no_example()
 def panel_well(**kwargs: TagAttrValue) -> RecallContextManager[Tag]:
     """
-    Context manager for a well panel
-
-    This function wraps :func:`~shiny.ui.panel_well`.
-
-    A well panel is a simple container with a border and some padding. It's useful for
-    grouping related content together.
+    Deprecated. Use :func:`~shiny.express.ui.card` instead.
     """
+    warn_deprecated("panel_well() is deprecated. Use shiny.express.ui.card() instead.")
     return RecallContextManager(
         ui.panel_well,
         kwargs=dict(

shiny/ui/_bootstrap.py

@@ -11,7 +11,6 @@
     "help_text",
 )
 
-
 from typing import Literal, Optional
 
 from htmltools import (
@@ -27,6 +26,7 @@
     tags,
 )
 
+from .._deprecated import warn_deprecated
 from .._docstring import add_example, no_example
 from ..module import current_namespace
 from ..types import MISSING, MISSING_TYPE
@@ -112,23 +112,9 @@ def column(
 @no_example()
 def panel_well(*args: TagChild | TagAttrs, **kwargs: TagAttrValue) -> Tag:
     """
-    Create a well panel.
-
-    Creates a panel with a slightly inset border and gray background. Equivalent to
-    Bootstrap's ``well`` CSS class.
-
-    Parameters
-    ----------
-    *args
-        UI elements to include inside the panel.
-    **kwargs
-        Attributes to place on the panel tag.
-
-    Returns
-    -------
-    :
-        A UI element.
+    Deprecated. Use :func:`~shiny.ui.card` instead.
     """
+    warn_deprecated("panel_well() is deprecated. Use shiny.ui.card() instead.")
     return div({"class": "well"}, *args, **kwargs)
 
 

shiny/ui/_layout_columns.py

@@ -186,31 +186,35 @@ def validate_col_width(
     x: Iterable[int] | int, n_kids: int, break_name: Breakpoint
 ) -> Iterable[int]:
     if isinstance(x, int):
-        y = [x]
+        widths = [x]
     else:
-        y = x
+        widths = list(x)
 
-    if not all(isinstance(i, int) for i in y):
-        raise ValueError(
-            f"Column values at breakpoint '{break_name}' must be integers. Values greater than 0 indicate width, and negative values indicate a column offset."
-        )
-
-    if any(i == 0 for i in y):
-        raise ValueError(
-            f"Column values at breakpoint '{break_name}' must be greater than 0 to indicate width, or negative to indicate a column offset."
-        )
+    positive_widths: list[int] = []
+    for w in widths:
+        if not isinstance(w, int):
+            raise TypeError(
+                f"Column widths at breakpoint '{break_name}' must be integers. Got {type(w).__name__}."
+            )
+        if w == 0:
+            raise ValueError(
+                f"Column widths at breakpoint '{break_name}' must be greater than 0 to indicate width, or negative to indicate a column offset."
+            )
+        if w > 0:
+            positive_widths.append(w)
 
-    if not any(b > 0 for b in y):
+    if not positive_widths:
         raise ValueError(
-            f"Column values at breakpoint '{break_name}' must include at least one positive integer width."
+            f"Column widths at breakpoint '{break_name}' must include at least one positive integer width."
         )
 
-    if len(list(y)) > n_kids:
+    if len(positive_widths) > n_kids:
         warn(
-            f"More column widths than children at breakpoint '{break_name}', extra widths will be ignored."
+            f"More column widths than children at breakpoint '{break_name}', extra widths will be ignored.",
+            stacklevel=2,
         )
 
-    return y
+    return widths
 
 
 def col_widths_attrs(col_widths: BreakpointsOptional[int] | None) -> TagAttrs: