com.alkacon.geranium.client.ui.input.MultiCheckBox Maven / Gradle / Ivy
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/*
* This library is part of Geranium -
* an open source UI library for GWT.
*
* 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
*
* 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 com.alkacon.geranium.client.ui.input;
import com.alkacon.geranium.client.I_HasInit;
import com.alkacon.geranium.client.ui.I_AutoHider;
import com.alkacon.geranium.client.ui.css.I_InputLayoutBundle;
import com.alkacon.geranium.client.ui.css.I_LayoutBundle;
import com.alkacon.geranium.client.util.ClientStringUtil;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Panel;
/**
* A form widget consisting of a group of checkboxes.
*/
public class MultiCheckBox extends Composite implements I_FormWidget, I_HasInit {
/** The type string for this widget. */
public static final String WIDGET_TYPE = "multiselect";
/** The list of checkboxes. */
private List m_checkboxes = new ArrayList();
/** Error display for this widget. */
private ErrorWidget m_error = new ErrorWidget();
/** The select options of the multi check box. */
private Map m_items = new LinkedHashMap();
/** Panel which contains all the components of the widget. */
private Panel m_panel = new FlowPanel();
/**
* Constructs a new checkbox group from a map from strings to strings.
*
* The keys of the map are used as the selection values of the checkboxes, while the value
* for a given key in the map is used as the label for the checkbox which is displayed to the user.
*
* @param items the map of checkbox options
*/
public MultiCheckBox(Map items) {
super();
init(items);
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#getApparentValue()
*/
public String getApparentValue() {
return getFormValueAsString();
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#getFieldType()
*/
public FieldType getFieldType() {
return I_FormWidget.FieldType.STRING_LIST;
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#getFormValue()
*/
public Object getFormValue() {
return new ArrayList(getSelected());
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#getFormValueAsString()
*/
public String getFormValueAsString() {
List selected = new ArrayList(getSelected());
return ClientStringUtil.listAsString(selected, "|");
}
/**
* Returns the set of values of the selected checkboxes.
*
* @return a set of strings
*/
public Set getSelected() {
Set result = new HashSet();
int i = 0;
for (Map.Entry entry : m_items.entrySet()) {
String key = entry.getKey();
CheckBox checkBox = m_checkboxes.get(i);
if (checkBox.isChecked()) {
result.add(key);
}
i += 1;
}
return result;
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#isEnabled()
*/
public boolean isEnabled() {
boolean result = true;
for (CheckBox checkbox : m_checkboxes) {
if (!checkbox.isEnabled()) {
result = false;
}
}
return result;
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#reset()
*/
public void reset() {
for (CheckBox checkbox : m_checkboxes) {
checkbox.setChecked(false);
}
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#setAutoHideParent(com.alkacon.geranium.client.ui.I_AutoHider)
*/
public void setAutoHideParent(I_AutoHider autoHideParent) {
// nothing to do
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#setEnabled(boolean)
*/
public void setEnabled(boolean enabled) {
for (CheckBox checkbox : m_checkboxes) {
checkbox.setEnabled(enabled);
}
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#setErrorMessage(java.lang.String)
*/
public void setErrorMessage(String errorMessage) {
m_error.setText(errorMessage);
}
/**
* Sets the value of the widget.
*
* @param value the new value
*/
@SuppressWarnings("unchecked")
public void setFormValue(Object value) {
if (value instanceof List) {
List keys = (List)value;
Set keySet = new HashSet(keys);
int i = 0;
for (Map.Entry entry : m_items.entrySet()) {
String key = entry.getKey();
CheckBox checkbox = m_checkboxes.get(i);
checkbox.setChecked(keySet.contains(key));
i += 1;
}
}
}
/**
* @see com.alkacon.geranium.client.ui.input.I_FormWidget#setFormValueAsString(java.lang.String)
*/
public void setFormValueAsString(String formValue) {
List values = ClientStringUtil.splitAsList(formValue, "|");
setFormValue(values);
}
/**
* Initializes the widget given a map of select options.
*
* The keys of the map are the values of the select options, while the values of the map
* are the labels which should be used for the checkboxes.
*
* @param items the map of select options
*/
protected void init(Map items) {
initWidget(m_panel);
m_items = new LinkedHashMap(items);
m_panel.setStyleName(I_InputLayoutBundle.INSTANCE.inputCss().multiCheckBox());
m_panel.addStyleName(I_LayoutBundle.INSTANCE.generalCss().textMedium());
for (Map.Entry entry : items.entrySet()) {
String value = entry.getValue();
CheckBox checkbox = new CheckBox(value);
// wrap the check boxes in FlowPanels to arrange them vertically
FlowPanel checkboxWrapper = new FlowPanel();
checkboxWrapper.add(checkbox);
m_panel.add(checkboxWrapper);
}
m_panel.add(m_error);
}
}