I am trying to change the background color of a tree item by adding a
dependent style name. However, when I called
treeItem.addStyleDependentName(newStyleName), nothing happened. I
look at the docs, and found out that addStyleDependentName calls
addStyleName(getStylePrimaryName() + "-" + newStyleName). So I
manually coded this, and still the new style was not applied. I did a
little tinkering, and discovered that getStylePrimaryName() was
returning an empty string, instead of "gwt-TreeItem" as the primary
style name. A simplified version of my code is below:
//JAVA CODE
Tree tree = new Tree();
TreeItem treeItem = new TreeItem("I'm a TreeItem!");
String style = treeItem.getStylePrimaryName() + "blue";
Window.alert(style);
treeItem.addStyleName(style);
tree.addItem(treeItem);
//CSS CODE
.gwt-TreeItem{
color: "red";
}
.gwt-TreeItem-blue{
background-color: "blue";
}
Somebody know how to fix this?
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