/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores
* CA 94065 USA or visit www.oracle.com if you need additional information or
* have any questions.
*/
package com.sun.lwuit;
import com.sun.lwuit.geom.Dimension;
import com.sun.lwuit.plaf.DefaultLookAndFeel;
import com.sun.lwuit.plaf.LookAndFeel;
import com.sun.lwuit.plaf.UIManager;
/**
* RadioButton is a {@link Button} that maintains a selection state exclusively
* within a specific {@link ButtonGroup}
*
* @author Chen Fishbein
*/
public class RadioButton extends Button {
private boolean selected= false;
/**
* The group in which this button is a part
*/
private ButtonGroup group;
private boolean oppositeSide;
/**
* Constructs a radio with the given text
*
* @param text to display next to the button
*/
public RadioButton(String text) {
this(text, null);
}
/**
* Creates an empty radio button
*/
public RadioButton() {
this("");
}
/**
* Constructs a radio with the given icon
*
* @param icon icon to show next to the button
*/
public RadioButton(Image icon) {
this("", icon);
}
/**
* Constructs a radio with the given text and icon
*
* @param text to display next to the button
* @param icon icon to show next to the button
*/
public RadioButton(String text,Image icon) {
super(text,icon);
setUIID("RadioButton");
updateSide();
}
/**
* @inheritDoc
*/
public String toString() {
return "Radio Button " + getText();
}
int getAvaliableSpaceForText() {
if(isToggle()) {
return super.getAvaliableSpaceForText();
}
LookAndFeel l = UIManager.getInstance().getLookAndFeel();
if(l instanceof DefaultLookAndFeel) {
Image[] rButtonImages = ((DefaultLookAndFeel)l).getRadioButtonImages();
if (rButtonImages != null) {
int index = isSelected() ? 1 : 0;
return super.getAvaliableSpaceForText() - rButtonImages[index].getWidth();
}
}
return super.getAvaliableSpaceForText() - (getHeight() + getGap());
}
/**
* Returns true if the radio button is selected
*
* @return true if the radio button is selected
*/
public boolean isSelected() {
return selected;
}
void setSelectedImpl(boolean selected) {
this.selected = selected;
repaint();
}
/**
* Selects the current radio button
*
* @param selected value for selection
*/
public void setSelected(boolean selected) {
setSelectedImpl(selected);
if(group != null && selected) {
group.setSelected(this);
}
}
/**
* @inheritDoc
*/
public void released(int x, int y) {
// prevent the radio button from being "turned off"
if(!isSelected()) {
setSelected(true);
}
super.released(x, y);
}
/**
* @inheritDoc
*/
public void paint(Graphics g) {
if(isToggle()) {
UIManager.getInstance().getLookAndFeel().drawButton(g, this);
} else {
UIManager.getInstance().getLookAndFeel().drawRadioButton(g, this);
}
}
/**
* @inheritDoc
*/
protected Dimension calcPreferredSize(){
return UIManager.getInstance().getLookAndFeel().getRadioButtonPreferredSize(this);
}
/**
* Setting a new button group
*
* @param group a new button group
*/
void setButtonGroup(ButtonGroup group) {
this.group = group;
}
/**
* @inheritDoc
*/
void fireActionEvent() {
if(group != null) {
group.setSelected(this);
}
super.fireActionEvent();
}
/**
* This is a helper method to ease the usage of button groups
*
* @param groupName a name for the goup
*/
public void setGroup(String groupName) {
putClientProperty("$group", groupName);
initNamedGroup();
}
void initComponentImpl() {
super.initComponentImpl();
initNamedGroup();
}
private void updateSide() {
Boolean v = UIManager.getInstance().isThemeConstant("radioOppositeSideBool");
if(v != null) {
oppositeSide = v.booleanValue();
}
}
/**
* @inheritDoc
*/
public void refreshTheme() {
super.refreshTheme();
updateSide();
}
private void initNamedGroup() {
if(isInitialized()) {
String s = getGroup();
if(s != null) {
Form f = getComponentForm();
ButtonGroup b = (ButtonGroup)f.getClientProperty("$radio" + s);
if(b == null) {
b = new ButtonGroup();
f.putClientProperty("$radio" + s, b);
}
b.add(this);
}
}
}
/**
* This is a helper method to ease the usage of button groups
*
* @return the name of the group
*/
public String getGroup() {
return (String)getClientProperty("$group");
}
/**
* Places the radio box on the opposite side at the far end
*
* @return the oppositeSide
*/
public boolean isOppositeSide() {
return oppositeSide;
}
/**
* Places the radio box on the opposite side at the far end
*
* @param oppositeSide the oppositeSide to set
*/
public void setOppositeSide(boolean oppositeSide) {
this.oppositeSide = oppositeSide;
}
}