com.google.gwt.dev.shell.CloseButton Maven / Gradle / Ivy
/*
* Copyright 2008 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.dev.shell;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JPanel;
/**
* Represents a close button, shrink-wrapped to exactly fit the size of the
* close icon.
*/
public class CloseButton extends JPanel {
/**
* Callback interface for clicking on the close button.
*/
public interface Callback {
/**
* Called when the close button is clicked.
*/
void onCloseRequest();
}
private Callback callback;
/**
* Create a close button.
*
* @param toolTipText text to use for tooltip if non-null
*/
public CloseButton(String toolTipText) {
super(new FlowLayout(FlowLayout.LEFT, 0, 0));
setOpaque(false);
ImageIcon closeIcon = Icons.getClose();
JButton button = new JButton(closeIcon);
button.setBorderPainted(false);
button.setPreferredSize(new Dimension(closeIcon.getIconWidth(),
closeIcon.getIconHeight()));
if (toolTipText != null) {
button.setToolTipText(toolTipText);
}
add(button);
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (callback != null) {
callback.onCloseRequest();
}
}
});
}
/**
* Set the callback for when this button is clicked.
*
* @param callback
*/
public void setCallback(Callback callback) {
this.callback = callback;
}
}