com.google.gwt.user.client.ui.FlowPanel Maven / Gradle / Ivy
/*
* Copyright 2007 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.user.client.ui;
import com.google.gwt.dom.client.Node;
import com.google.gwt.user.client.DOM;
/**
* A panel that formats its child widgets using the default HTML layout
* behavior.
*
*
* 
*
*/
public class FlowPanel extends ComplexPanel implements InsertPanel.ForIsWidget {
/**
* Creates an empty flow panel.
*/
public FlowPanel() {
setElement(DOM.createDiv());
}
/**
* Adds a new child widget to the panel.
*
* @param w the widget to be added
*/
@Override
public void add(Widget w) {
add(w, getElement());
}
@Override
public void clear() {
try {
doLogicalClear();
} finally {
// Remove all existing child nodes.
Node child = getElement().getFirstChild();
while (child != null) {
getElement().removeChild(child);
child = getElement().getFirstChild();
}
}
}
public void insert(IsWidget w, int beforeIndex) {
insert(asWidgetOrNull(w), beforeIndex);
}
/**
* Inserts a widget before the specified index.
*
* @param w the widget to be inserted
* @param beforeIndex the index before which it will be inserted
* @throws IndexOutOfBoundsException if beforeIndex is out of
* range
*/
public void insert(Widget w, int beforeIndex) {
insert(w, getElement(), beforeIndex, true);
}
}