AddChildComponent() - how does it work?

[Captain]

When I try to use AddChildComponent() for any GUI element, the child component simply disappears? For example, I have two text labels, and do this in the code:

Code: Select all

textLabel1.AddChildComponent( textLabel2 );

As soon as I do that, textLabel2 disappears from the interface. I have tried moving both components, setting their visibility to true, etc, but textLabel2 stays awol. Is there something super obvious I'm missing? The only documentation I found is the short javadoc description...

[rsover]

I think the parent component should be a container component. https://docs.oracle.com/javase/tutorial ... index.html

I have not done VMDesiner development so far, but could be a solution.

[Cherry Garcia]

Set the position relative to the parent. That should help.

[Captain]

Set the position relative to the parent. That should help.

Yes, now I got it, thank you! But it also seems that the child component needs to be inside the parent's bounding rectangle, the rest is cut off. No problem, I just thought that the parent-child-relationship would simply mean locking the components' coordinates to each other, no matter what their initial placement is (like the "Link selected controls" option), that's what threw me off.

I think the parent component should be a container component. https://docs.oracle.com/javase/tutorial ... index.html

Yeah, indeed it looks like the parent component is treated like a container. What confused is me that you can add children to all GUI elements (text labels, buttons, etc), which don't "feel" like containers the same way a canvas does, for example.

[Cherry Garcia]

(= Glad you got it figured out. The upcoming Piano Roll module uses child components extensively. Each note object is a VoltageRectangle inside of VoltageViewport. Hovering over a note object will add a label over the note object in order to show it's note value, for example. Should be coming up in the next month or so.