Example usage for com.vaadin.ui Component isAttached

Introduction

In this page you can find the example usage for com.vaadin.ui Component isAttached.

Prototype

public boolean isAttached();

Source Link

Document

Checks if the connector is attached to a VaadinSession.

Usage

From source file:annis.libgui.IDGenerator.java

License:Apache License

public static String assignID(Component c, String fieldName) {
    String id = null;//from  www.j a  va  2  s.c o  m
    if (c != null && fieldName != null && !fieldName.isEmpty()) {
        Preconditions.checkArgument(c.isAttached(),
                "Component " + c.getConnectorId() + " must be attached before it can get an automatic ID.");
        id = c.getId();
        if (id == null) {
            // try to get the parent ID
            HasComponents parent = c.getParent();
            if (parent == null || parent instanceof UI) {
                // use class name as ID
                id = fieldName;
            } else {
                String parentID = parent.getId();
                if (parentID == null) {
                    parentID = assignID(parent);
                }
                String idBase = parentID + ":" + fieldName;
                // check that no other child has the same ID
                int counter = 1;
                id = idBase;
                while (childHasID(parent, id)) {
                    id = idBase + "." + counter++;
                }
            }
            c.setId(id);
        }
    }
    return id;
}

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From source file:com.haulmont.cuba.web.toolkit.ui.CubaWidgetsTree.java

License:Apache License

protected void detachGeneratedComponents() {
    for (Component c : nodeWidgets) {
        if (c.isAttached()) {
            c.detach();/*from  w w w. j  a  v a 2  s .co m*/
        }
    }
}

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