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CssImport when using Component Exporter by Mikhail Shabarov, 1 month ago
Recent Posts
Vaadin Forum1. Vaadin Flow - Java

replaceComponent()

Jane Dough
5 years ago Oct 19, 2016 8:55pm

Trying to use replaceComponent() to remove one VerticalLayout from the root component and replace it with another from another view, as described here.  My code below does not replace the layout, but adds to it, so that the oldLayout is displayed, followed by the newLayout.  Any thoughts to share?  All is appreciated.

My code...

        VerticalLayout oldLayout = userView.getLayout();
        VerticalLayout newLayout = new VerticalLayout(); 
        newLayout.addComponent(userView.setupLayout(userView.updateList()));
        userView.getRootComponent().replaceComponent(oldLayout, newLayout);
        oldLayout = newLayout;

Olli Tietäväinen
5 years ago Oct 21, 2016 1:30pm

Hi,

just a thought, looking at the javadocs of the replaceComponent method: 

This method replaces component with another one is such way that the new component overtakes
the position of the old component. If the old component is not in the container, the new
component is added to the container.

so maybe the rootComponent isn't the one you want? Could even be that the rootComponent is the same as the one returned by getLayout(), so you're basically writing oldLayout.replaceComponent(oldLayout, newLayout), which would just add the newLayout to the root layout of your userView.

I did a quick simple test with replaceComponent and it seems to work as advertised.

-Olli

+1