How to redraw bullet label without re-rendering chart?

[sivaramakrishnan-stratforge]

Question: How to redraw bullet label without re-rendering chart?

I have labels inside series.bullets. When external state changes, I want to update the label text without re-rendering the whole chart or recreating bullets.

I tried marking labels as dirty:

series.bulletsContainer.children.each((bullet) => {
  const label = bullet.get("sprite");
  label?.markDirty();
  label?.text?.markDirtyText();
});

But the label text is not updating.
Is there a way to force label redraw/re-evaluation (like a “dirty” trigger) without:

• recreating bullets
• calling series.data.setAll(...)

Thanks!

[martynasma]

Does the text for the bullet come from a data item or somewhere else?

If it's the data item, how is it updated?

[sivaramakrishnan-stratforge]

I have a condition that determines what value to display. If the condition is true, I show my own custom text instead of the value from the data item. If the condition is false, I display the original value from the data item.

In this case, since I need only changes the label content, I don’t want to re-render the entire chart, I simply need to update the series label.

[sivaramakrishnan-stratforge]

@martynasma Any update?

[github-actions]

This issue is stale because it has been open 30 days with no activity. It will be closed in 5 days unless a new comment is added.

[sivaramakrishnan-stratforge]

Is this repo is active?

[martynasma]

Hey. Sorry our GitHub>Zendesk integration has been broken for some time, so I didn't notice your reply.

Do you have a demo of your chart?

Also, what triggers the change? Do you change your data? Data item directly? Something else?

[sivaramakrishnan-stratforge]

Basically, I want to display the previous state and current state within a single bar. The full bar represents the previous state, while a shorter bar inside it represents the current state. I'm using a gradient effect to achieve this visualization.

For column charts, I'm updating the valueY of the data item so that the label displays the current state value. However, the column height remains unchanged, which is the behavior I want because the bar should continue to represent the previous state.

The only issue is that when the state changes, I need to reset the data item's valueY back to the original (previous state) value so that the label reflects it again.