Python altair.layer() Examples

The following are 3 code examples of altair.layer(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module altair , or try the search function .
Example #1
Source File: runways.py    From traffic with MIT License 6 votes vote down vote up 
def geoencode(
        self, mode: str = "geometry"
    ) -> Optional[alt.Chart]:  # coverage: ignore

        if mode == "geometry":
            return (
                super().geoencode().mark_geoshape(strokeWidth=2, stroke="black")
            )

        elif mode == "labels":
            rwy_labels = alt.Chart(self.data).encode(
                longitude="longitude:Q", latitude="latitude:Q", text="name:N"
            )
            rwy_layers = [
                rwy_labels.transform_filter(alt.datum.name == name).mark_text(
                    angle=bearing, baseline="middle", dy=10
                )
                for (name, bearing) in zip(self.data.name, self.data.bearing)
            ]

            return alt.layer(*rwy_layers)

        else:
            return None
Example #2
Source File: structure.py    From traffic with MIT License 6 votes vote down vote up 
def geoencode(
        self,
        footprint: bool = True,
        runways: bool = False,
        labels: bool = False,
    ) -> alt.Chart:  # coverage: ignore
        cumul = []
        if footprint:
            cumul.append(super().geoencode())
        if runways:
            cumul.append(self.runways.geoencode())
        if labels:
            cumul.append(self.runways.geoencode("labels"))
        if len(cumul) == 0:
            raise TypeError(
                "At least one of footprint, runways and labels must be True"
            )
        return alt.layer(*cumul)
Example #3
Source File: app.py    From demo-self-driving with Apache License 2.0 5 votes vote down vote up 
def frame_selector_ui(summary):
    st.sidebar.markdown("# Frame")

    # The user can pick which type of object to search for.
    object_type = st.sidebar.selectbox("Search for which objects?", summary.columns, 2)

    # The user can select a range for how many of the selected objecgt should be present.
    min_elts, max_elts = st.sidebar.slider("How many %ss (select a range)?" % object_type, 0, 25, [10, 20])
    selected_frames = get_selected_frames(summary, object_type, min_elts, max_elts)
    if len(selected_frames) < 1:
        return None, None

    # Choose a frame out of the selected frames.
    selected_frame_index = st.sidebar.slider("Choose a frame (index)", 0, len(selected_frames) - 1, 0)

    # Draw an altair chart in the sidebar with information on the frame.
    objects_per_frame = summary.loc[selected_frames, object_type].reset_index(drop=True).reset_index()
    chart = alt.Chart(objects_per_frame, height=120).mark_area().encode(
        alt.X("index:Q", scale=alt.Scale(nice=False)),
        alt.Y("%s:Q" % object_type))
    selected_frame_df = pd.DataFrame({"selected_frame": [selected_frame_index]})
    vline = alt.Chart(selected_frame_df).mark_rule(color="red").encode(
        alt.X("selected_frame:Q", axis=None)
    )
    st.sidebar.altair_chart(alt.layer(chart, vline))

    selected_frame = selected_frames[selected_frame_index]
    return selected_frame_index, selected_frame

# Select frames based on the selection in the sidebar