/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* For further information about Alkacon Software, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.gwt.client.ui.input;
import org.opencms.gwt.client.ui.CmsToggleButton;
import org.opencms.gwt.client.ui.I_CmsButton.ButtonStyle;
import org.opencms.gwt.client.ui.css.I_CmsInputCss;
import org.opencms.gwt.client.ui.css.I_CmsInputLayoutBundle;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.HasClickHandlers;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
/**
* Class representing a single radio button.<p>
*
* In most cases, you will need to set the group of a radio button, which is a Java object,
* not just a string as in HTML radio buttons. Clicking on a radio button in a group will result
* in the radio button being selected, and none of the other buttons in the group being selected.<p>
*
* @since 8.0.0
*
*/
public class CmsRadioButton extends Composite implements HasHorizontalAlignment, HasClickHandlers {
/** The CSS bundle instance used for this widget. */
private static final I_CmsInputCss CSS = I_CmsInputLayoutBundle.INSTANCE.inputCss();
/** The wigdet used to implement the actual radio button. */
protected CmsToggleButton m_button = new CmsToggleButton();
/** The radio button group. */
protected CmsRadioButtonGroup m_group;
/** The current horizontal alignment. */
private HorizontalAlignmentConstant m_align;
/** The value associated with this radio button. */
private String m_name;
/**
* Creates a new radio button without setting the name and label text.<p>
*/
public CmsRadioButton() {
m_button.setUseMinWidth(false);
m_button.setButtonStyle(ButtonStyle.TRANSPARENT, null);
m_button.setImageClass(CSS.radioButtonImage());
setHorizontalAlignment(ALIGN_RIGHT);
initWidget(m_button);
addStyleName(CSS.radioButton());
addStyleName(CSS.inlineBlock());
m_button.addClickHandler(new ClickHandler() {
/**
* @see com.google.gwt.event.dom.client.ClickHandler#onClick(com.google.gwt.event.dom.client.ClickEvent)
*/
public void onClick(ClickEvent event) {
m_button.setDown(true);
if (m_group != null) {
m_group.selectButton(CmsRadioButton.this);
}
}
});
}
/**
* Creates a new radio button.<p>
*
* @param name the value associated with this radio button
* @param labelText the label text of the radio button
*/
public CmsRadioButton(String name, String labelText) {
this();
m_name = name;
if (labelText != null) {
m_button.setText(labelText);
}
}
/**
* Adds a click handler to the radio button.<p>
*
* @see com.google.gwt.event.dom.client.HasClickHandlers#addClickHandler(com.google.gwt.event.dom.client.ClickHandler)
*/
public HandlerRegistration addClickHandler(ClickHandler handler) {
return addDomHandler(handler, ClickEvent.getType());
}
/**
* This is the alignment of the text in reference to the checkbox, possible values are left or right.<p>
*
* @see com.google.gwt.user.client.ui.HasHorizontalAlignment#getHorizontalAlignment()
*/
public HorizontalAlignmentConstant getHorizontalAlignment() {
return m_align;
}
/**
* Returns the value associated with this radio button.<p>
*
* @return the value associated with this radio button
*/
public String getName() {
return m_name;
}
/**
* Returns true if the radio button is checked.<p>
*
* @return true if the radio button is checked
*/
public boolean isChecked() {
return m_button.isDown();
}
/**
* Returns <code>true</code> if this widget is enabled.<p>
*
* @return <code>true</code> if this widget is enabled
*/
public boolean isEnabled() {
return m_button.isEnabled();
}
/**
* Sets the 'checked' status of the radio button.<p>
*
* @param checked if true, check the radio button, else uncheck it
*/
public void setChecked(boolean checked) {
m_button.setDown(checked);
if (checked) {
m_group.selectButton(this);
} else {
m_group.deselectButton();
}
}
/**
* Enables or disables the radio button.<p>
*
* @param enabled if true, the radio button is enabled, else disabled
*/
public void setEnabled(boolean enabled) {
m_button.setEnabled(enabled);
}
/**
* Sets the group for this radio button.<p>
*
* @param group
*/
public void setGroup(CmsRadioButtonGroup group) {
m_group = group;
}
/**
* This is the alignment of the text in reference to the checkbox, possible values are left or right.<p>
*
* @see com.google.gwt.user.client.ui.HasHorizontalAlignment#setHorizontalAlignment(com.google.gwt.user.client.ui.HasHorizontalAlignment.HorizontalAlignmentConstant)
*/
public void setHorizontalAlignment(HorizontalAlignmentConstant align) {
if (align.equals(HasHorizontalAlignment.ALIGN_CENTER)) {
// ignore center alignment
return;
}
m_button.setHorizontalAlignment(align);
m_align = align;
}
/**
* Sets the name of this radio button.<p>
*
* @param name the new name
*/
public void setName(String name) {
m_name = name;
}
/**
* Sets the text which is displayed next to the radio button.<p>
*
* @param text the new text
*/
public void setText(String text) {
m_button.setText(text);
}
}