Dashboard

Dashboards allow you to create a page layout containing a collection of components. The user can move and resize panels within the dashboard.

Example

from deephaven import ui

my_dash = ui.dashboard(
    ui.row(
        ui.column(ui.panel("A"), ui.panel("C")),
        ui.column(ui.panel("B"), ui.panel("D")),
    )
)

Dashboard Basic Example

Rules

Dashboards must be a child of the root script and not nested inside a @ui.component. Otherwise, the application cannot correctly determine the type of the component.
Dashboards must have one and only one child, typically a row or column.
Height and width of panels are summed to 100% within a row or column.

Key Components

Four main children make up a dashboard: row, column, stack, and panels.

Row: A container used to group elements horizontally. Each element is placed to the right of the previous one.
Column: A container used to group elements vertically. Each element is placed below the previous one.
Stack: A container used to group elements into a stack of tabs. Each element gets its own tab, with only one element visible at a time.
Panel: A container used to group and label elements.

Layout Hierarchy

Top-Level

Your dashboard must start with a row or column, which is the “top” of the layout tree. Columns should go inside rows and rows should go inside columns

Note: Nesting rows within rows or columns within columns will sub-divide the row or column.

Bottom-Level

Stacks and panels are considered the “bottom” of the layout tree. Once added, the layout in that section is considered complete. You can’t further nest stacks within panels. For layouts within a panel, see tabs, flex, and grid.

Automatic Wrapping

Children are implicitly wrapped when necessary, so the entire layout does not need to be explicitly defined.

End to end example: dashboard([t1, t2]) would become dashboard(column(stack(panel(t1)), stack(panel(t2)))).

Automatic wrapping is applied by the following rules:

Dashboard: wrap in row/column if no single node is the default (e.g., [t1, t2] as the child to the dashboard would become row(t1, t2)).
Row/Column:
- If there are children that are rows/columns, wrap the non-wrapped children with the same element (e.g., row(col(t1), t2) becomes row(col(t1), col(t2))).
- If none of the children are wrapped by rows/columns, they are wrapped in stacks (e.g., row(col(t1), col(t2)) from above becomes row(col(stack(t1)), col(stack(t2)))).
Stacks: wrap non-panel children in panels (e.g., row(col(stack(t1)), col(stack(t2))) becomes row(col(stack(panel(t1))), col(stack(panel(t2))))).

Varying dimensions

Rows can have a specified height, while columns can have a specified width.

Stacks directly within a column can have a height or a width if they are within a row. Setting the other dimension will be ignored.

Varying row heights

from deephaven import ui

dash_row_heights = ui.dashboard(
    [
        ui.row(ui.stack(ui.panel("A", title="A")), ui.panel("B", title="B"), height=70),
        ui.row(ui.stack(ui.panel("C", title="C")), ui.panel("D", title="D")),
    ]
)

Varying column widths

from deephaven import ui

dash_column_widths = ui.dashboard(
    [
        ui.column(
            ui.stack(ui.panel("A", title="A")), ui.panel("C", title="C"), width=70
        ),
        ui.column(ui.stack(ui.panel("B", title="B")), ui.panel("D", title="D")),
    ]
)

Varying stack widths

from deephaven import ui

dash_stack_widths = ui.dashboard(
    ui.row(ui.stack(ui.panel("A", title="A"), width=70), ui.panel("B", title="B"))
)

Varying stack heights

from deephaven import ui

dash_stack_heights = ui.dashboard(
    ui.column(ui.stack(ui.panel("A", title="A"), height=70), ui.panel("B", title="B"))
)

Layout Examples

Row split (2x1)

from deephaven import ui

dash_2x1 = ui.dashboard(ui.row(ui.panel("A", title="A"), ui.panel("B", title="B")))

Column split (1x2)

from deephaven import ui

dash_1x2 = ui.dashboard(ui.column(ui.panel("A", title="A"), ui.panel("B", title="B")))

2x2

from deephaven import ui

dash_2x2 = ui.dashboard(
    ui.row(
        ui.column(ui.panel("A", title="A"), ui.panel("C", title="C")),
        ui.column(ui.panel("B", title="B"), ui.panel("D", title="D")),
    )
)

3x1

from deephaven import ui

dash_3x1 = ui.dashboard(
    ui.row(ui.panel("A", title="A"), ui.panel("B", title="B"), ui.panel("C", title="C"))
)

Basic stack

from deephaven import ui

dash_stack = ui.dashboard(
    ui.stack(
        ui.panel("A", title="A"), ui.panel("B", title="B"), ui.panel("C", title="C")
    )
)

Stack with nested tabs

from deephaven import ui

dash_stack = ui.dashboard(
    ui.stack(
        ui.panel(
            ui.tabs(ui.tab("A1 content", title="A1"), ui.tab("A2 content", title="A2")),
            title="A",
        ),
        ui.panel(
            ui.tabs(ui.tab("B1 content", title="B1"), ui.tab("B2 content", title="B2")),
            title="B",
        ),
    )
)

Stack in a layout

from deephaven import ui

dash_layout_stack = ui.dashboard(
    ui.row(
        ui.stack(
            ui.panel("A", title="A"), ui.panel("B", title="B"), ui.panel("C", title="C")
        ),
        ui.panel("D", title="D"),
        ui.panel("E", title="E"),
    )
)

Holy Grail

from deephaven import ui

dash_holy_grail = ui.dashboard(
    ui.column(
        ui.panel("Header", title="Header"),
        ui.row(
            ui.panel("Left Sidebar", title="Left Sidebar"),
            ui.stack(ui.panel("Main Content", title="Main Content"), width=70),
            ui.panel("Right Sidebar", title="Right Sidebar"),
        ),
        ui.panel("Footer", title="Footer"),
    )
)

Stateful Example

By hoisting state management to the dashboard component, interacting and sharing data between the child components is much easier to maintain and debug.

Simple

from deephaven import ui


@ui.component
def layout():
    message, set_message = ui.use_state("Hello world!")

    return ui.row(
        ui.panel(ui.text_field(value=message, on_change=set_message, width="100%")),
        ui.panel(message),
    )


dash_simple_state = ui.dashboard(layout())

Complex

from deephaven import ui, time_table
from deephaven.ui import use_memo, use_state
from deephaven.plot.figure import Figure


def use_wave_input():
    """
    Demonstrating a custom hook.
    Creates an input panel that controls the amplitude, frequency, and phase for a wave
    """
    amplitude, set_amplitude = use_state(1.0)
    frequency, set_frequency = use_state(1.0)
    phase, set_phase = use_state(1.0)

    input_panel = ui.flex(
        ui.slider(
            label="Amplitude",
            default_value=amplitude,
            min_value=-100.0,
            max_value=100.0,
            on_change=set_amplitude,
            step=0.1,
        ),
        ui.slider(
            label="Frequency",
            default_value=frequency,
            min_value=-100.0,
            max_value=100.0,
            on_change=set_frequency,
            step=0.1,
        ),
        ui.slider(
            label="Phase",
            default_value=phase,
            min_value=-100.0,
            max_value=100.0,
            on_change=set_phase,
            step=0.1,
        ),
        direction="column",
    )

    return amplitude, frequency, phase, input_panel


@ui.component
def multiwave():
    amplitude, frequency, phase, wave_input = use_wave_input()

    tt = use_memo(lambda: time_table("PT1s").update("x=i"), [])
    t = use_memo(
        lambda: tt.update(
            [
                f"y_sin={amplitude}*Math.sin({frequency}*x+{phase})",
                f"y_cos={amplitude}*Math.cos({frequency}*x+{phase})",
                f"y_tan={amplitude}*Math.tan({frequency}*x+{phase})",
            ]
        ),
        [amplitude, frequency, phase],
    )
    p_sin = use_memo(
        lambda: Figure().plot_xy(series_name="Sine", t=t, x="x", y="y_sin").show(), [t]
    )
    p_cos = use_memo(
        lambda: Figure().plot_xy(series_name="Cosine", t=t, x="x", y="y_cos").show(),
        [t],
    )
    p_tan = use_memo(
        lambda: Figure().plot_xy(series_name="Tangent", t=t, x="x", y="y_tan").show(),
        [t],
    )

    return ui.column(
        ui.row(
            ui.stack(
                ui.panel(wave_input, title="Wave Input"),
                ui.panel(t, title="Wave Table"),
                active_item_index=0,
            ),
            height=25,
        ),
        ui.row(
            ui.stack(ui.panel(p_sin, title="Sine"), width=50),
            ui.stack(ui.panel(p_cos, title="Cosine"), width=30),
            ui.stack(ui.panel(p_tan, title="Tangent")),
        ),
    )


dash_complex_state = ui.dashboard(multiwave())

API Reference

A dashboard is the container for an entire layout.

Returns: DashboardElement The rendered dashboard.

Parameters	Type	Default	Description
element	FunctionElement		Element to render as the dashboard. The element should render a layout that contains 1 root column or row.

Row API Reference

A row is a container that can be used to group elements. Each element will be placed to the right of its prior sibling.

Returns: Element The rendered row element.

Parameters	Type	Default	Description
*children	Any		Elements to render in the row.
key	str \| None	None	A unique identifier used by React to render elements in a list.

Column API Reference

A column is a container that can be used to group elements. Each element will be placed below its prior sibling.

Returns: Element The rendered column element.

Parameters	Type	Default	Description
*children	Any		Elements to render in the column.
key	str \| None	None	A unique identifier used by React to render elements in a list.

Stack API Reference

A stack is a container that can be used to group elements which creates a set of tabs. Each element will get a tab and only one element can be visible at a time.

Returns: Element The rendered stack element.

Parameters	Type	Default	Description
*children	Any		Elements to render in the row.
active_item_index	int \| None	None	The index of the active item in the stack.
key	str \| None	None	A unique identifier used by React to render elements in a list.

Dashboard

Example

Rules

Key Components

Layout Hierarchy

Top-Level

Bottom-Level

Automatic Wrapping

Varying dimensions

Varying row heights

Varying column widths

Varying stack widths

Varying stack heights

Layout Examples

Row split (2x1)

Column split (1x2)

2x2

3x1

Basic stack

Stack with nested tabs

Stack in a layout

Holy Grail

Stateful Example

Simple

Complex

API Reference

Row API Reference

Sizing props

Column API Reference

Sizing props

Stack API Reference

Sizing props