Ways to conceal the expand/collapse icon in a Vaadin treetable?

Hello everyone! I am sharing a treetable below:

I attempted to set the itemcaption to null with the following code, but unfortunately it did not work as expected:

public void uncollapseTable(){
    for (Object itemId: tblFinalGrade.getItemIds()){
        tblFinalGrade.setCollapsed(itemId, false);
        unHideChildren(itemId);
        tblFinalGrade.setItemCaption(itemId, null);
    }
}
public void unHideChildren(Object itemId){
    if(tblFinalGrade.hasChildren(itemId)){
        for(Object id : tblFinalGrade.getChildren(itemId)){
            tblFinalGrade.setCollapsed(id, false);
            unHideChildren(id);
            tblFinalGrade.setItemCaption(id, null);
        }
    }           
}

Is there a way to hide the expand/collapse icons without using css? If not, how can I achieve this with css? Thank you in advance!

Answer №1

To apply this change, include the following code in your styles.scss file and then recompile the theme.

.v-treetable-treespacer{
    visibility: hidden;
}

Unfortunately, it's not feasible to hide this specific icon using only Vaadin components.

Answer №2

Appreciation to @Kukis for the inspiration. Opting to display nothing effectively eliminated the icons and formatting, so I opted to make it discreet instead. I introduced:

.v-treetable-treespacer{
    visibility: hidden;
}

into my theme and recompiled it. Consequently, it now appears as follows:

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