GWT-树-TreeItem中仅粗体的父项

Question

I would like in a Tree to bold parent item only, and keep the sub-items normal size.

I tried to use css in this way, but it does not work:

.gwt-Tree{
    font-weight: bold;
}

.gwt-TreeItem {
    font-weight: normal;
}

.gwt-Tree .gwt-TreeItem-selected {
    font-weight: normal;
}

Is there a way to get there?

Thank you in advance

Edited- Java code:

String[] composers = new String[]{"Item 1","Item 2","Item 3"};

Resources treeResource = GWT.create(TreeResources.class); 

Tree staticTree = new Tree(treeResource);

TreeItem item1 = staticTree.addTextItem(composers[0]);          

TreeItem item2 = staticTree.addTextItem(composers[1]);

// add sub items
addItemSection(item1, "item 1 - 1",new String[]{});
addItemSection(item1, "item 1 - 2", new String[]{});

addItemSection(item2, "item 2 - 1",new String[]{});
addItemSection(item2, "item 2 - 2", new String[]{});
addItemSection(item2, "item 2 - 3", new String[]{});

TreeItem item = new TreeItem();
item1.addItem(item);
item2.addItem(item);

Tree t = new Tree();
t.addItem(item1);
t.addItem(item2);

private void addItemSection(TreeItem parent, String label, String[] composerWorks) 
{
   TreeItem section = parent.addTextItem(label);        

   for (String work : composerWorks) {
    section.addTextItem(work);
   }
}

The result:

Item 1
Item 1 - 1
Item 1 - 2

Item 2
Item 2 - 1
Item 2 - 2
Item 2 - 3

But in my case everything is in bold :/

Answer 1

It's been a while for me but I remember you can add HTML tags for CSS styles in your java code to the tree objects.

See: http://blog.francoismaillet.com/?p=68

Answer 2

One way to do it is like this:

.root {font-size: 12; font-weight: bold;}
.leaf {font-size: 12; font-weight: normal;}

TreeItem root = new TreeItem("MyRootDescr");
root.addStyleName("root");

TreeItem item = new TreeItem("MyLeafDescr");
item.addStyleName("leaf");

Answer 3

This may seem inelegant, but it works. After setting the parent item style iterate through children and set their style to the basic style (in your case plain text).

in your CSS file:

.styleTreeItemParent {
 font-weight: bold;
}

.styleTreeItemChild {
 font-weight: normal;
}

in your GWT class: add method styleParent with parent treeItem as argument.

 private void styleParent(TreeItem item) {
    int nC=item.getChildCount();
        item.setStyleName("styleTreeItemParent");

        for(int i=0;i<nC;i++) {
            item.getChild(i).setStyleName("styleTreeItemChild");
        }
}