com.codename1.components.CheckBoxList Maven / Gradle / Ivy
/*
* Copyright (c) 2012, Codename One 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. Codename One 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 Codename One through http://www.codenameone.com/ if you
* need additional information or have any questions.
*/
package com.codename1.components;
import com.codename1.ui.CheckBox;
import com.codename1.ui.Component;
import com.codename1.ui.events.ActionEvent;
import com.codename1.ui.events.ActionListener;
import com.codename1.ui.list.MultipleSelectionListModel;
/**
* A list of checkboxes.
*
*
*
* @author Steve Hannah
* @since 6.0
* @see ButtonList for code samples.
*/
public class CheckBoxList extends ButtonList {
/**
* Change listener added to individual checkboxes to keep them in sync with the model.
*/
private final ActionListener changeListener = new ActionListener() {
@Override
public void actionPerformed(ActionEvent evt) {
if (evt.getSource() instanceof CheckBox && contains((Component)evt.getSource())) {
CheckBox src = (CheckBox)evt.getSource();
int index = CheckBoxList.this.getComponentIndex(src);
if (src.isSelected()) {
getMultiListModel().addSelectedIndices(index);
} else {
getMultiListModel().removeSelectedIndices(index);
}
}
}
};
public CheckBoxList(MultipleSelectionListModel model) {
super(model);
fireReady();
}
@Override
public boolean isAllowMultipleSelection() {
return true;
}
@Override
protected Component createButton(Object model) {
return new CheckBox(String.valueOf(model));
}
@Override
protected void setSelected(Component button, boolean selected) {
((CheckBox)button).setSelected(selected);
}
@Override
protected Component decorateComponent(Object modelItem, Component b) {
b = super.decorateComponent(modelItem, b);
((CheckBox)b).addActionListener(this);
((CheckBox)b).addChangeListener(changeListener);
return b;
}
@Override
protected Component undecorateComponent(Component b) {
((CheckBox)b).removeActionListener(this);
((CheckBox)b).removeChangeListeners(changeListener);
return super.undecorateComponent(b);
}
}