Example usage for com.google.gwt.user.client.ui TreeItem setParentItem

Introduction

In this page you can find the example usage for com.google.gwt.user.client.ui TreeItem setParentItem.

Prototype

void setParentItem(TreeItem parent) 

Source Link

Usage

From source file:org.iucn.sis.client.ui.TreeTable.java

License:Apache License

/**
 * Constructs an empty tree.//from  w w  w  . jav  a  2  s . c om
 */
public TreeTable() {
    Element tableElem = getElement();
    headElem = DOM.createElement("thead");
    Element tr = DOM.createTR();
    DOM.appendChild(headElem, tr);
    DOM.insertChild(tableElem, headElem, 0);

    DOM.setStyleAttribute(getElement(), "position", "relative");
    // focusable = impl.createFocusable();
    // DOM.setStyleAttribute(focusable, "fontSize", "0");
    // DOM.setStyleAttribute(focusable, "position", "absolute");
    // DOM.setIntStyleAttribute(focusable, "zIndex", -1);
    // DOM.appendChild(getElement(), focusable);

    sinkEvents(Event.MOUSEEVENTS | Event.ONCLICK | Event.KEYEVENTS);
    // DOM.sinkEvents(focusable, Event.FOCUSEVENTS | Event.KEYEVENTS |
    // DOM.getEventsSunk(focusable));

    // The 'root' item is invisible and serves only as a container
    // for all top-level items.
    root = new TreeItem() {
        @Override
        public void addItem(TreeItem item) {
            // If this element already belongs to a tree or tree item,
            // remove it.
            if ((item.getParentItem() != null) || (item.getTreeTable() != null)) {
                item.remove();
            }
            item.setTreeTable(this.getTreeTable());

            // Explicitly set top-level items' parents to null.
            item.setParentItem(null);
            getChildren().add(item);

            // Use no margin on top-most items.
            DOM.setIntStyleAttribute(item.getElement(), "marginLeft", 0);
        }

        @Override
        public void removeItem(TreeItem item) {
            if (!getChildren().contains(item)) {
                return;
            }
            // Update Item state.
            item.setTreeTable(null);
            item.setParentItem(null);
            getChildren().remove(item);
        }
    };
    root.setTreeTable(this);
    setStyleName("gwt-TreeTable");
}

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