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/*
* Copyright (c) 2011, 2013, 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 sun.lwawt;
import java.awt.Checkbox;
import java.awt.CheckboxGroup;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.peer.CheckboxPeer;
import java.beans.Transient;
import javax.swing.JCheckBox;
import javax.swing.JComponent;
import javax.swing.JRadioButton;
import javax.swing.JToggleButton;
import javax.swing.SwingUtilities;
/**
* Lightweight implementation of {@link CheckboxPeer}. Delegates most of the
* work to the {@link JCheckBox} and {@link JRadioButton}, which are placed
* inside an empty {@link JComponent}.
*/
final class LWCheckboxPeer
extends LWComponentPeer<Checkbox, LWCheckboxPeer.CheckboxDelegate>
implements CheckboxPeer, ItemListener {
LWCheckboxPeer(final Checkbox target,
final PlatformComponent platformComponent) {
super(target, platformComponent);
}
@Override
CheckboxDelegate createDelegate() {
return new CheckboxDelegate();
}
@Override
Component getDelegateFocusOwner() {
return getDelegate().getCurrentButton();
}
@Override
void initializeImpl() {
super.initializeImpl();
setLabel(getTarget().getLabel());
setState(getTarget().getState());
setCheckboxGroup(getTarget().getCheckboxGroup());
}
@Override
public void itemStateChanged(final ItemEvent e) {
// group.setSelectedCheckbox() will repaint the component
// to let LWCheckboxPeer correctly handle it we should call it
// after the current event is processed
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
boolean postEvent = true;
final CheckboxGroup group = getTarget().getCheckboxGroup();
if (group != null) {
if (e.getStateChange() == ItemEvent.SELECTED) {
if (group.getSelectedCheckbox() != getTarget()) {
group.setSelectedCheckbox(getTarget());
} else {
postEvent = false;
}
} else {
postEvent = false;
if (group.getSelectedCheckbox() == getTarget()) {
// Don't want to leave the group with no selected
// checkbox.
getTarget().setState(true);
}
}
} else {
getTarget().setState(e.getStateChange()
== ItemEvent.SELECTED);
}
if (postEvent) {
postEvent(new ItemEvent(getTarget(),
ItemEvent.ITEM_STATE_CHANGED,
getTarget().getLabel(),
e.getStateChange()));
}
}
});
}
@Override
public void setCheckboxGroup(final CheckboxGroup g) {
synchronized (getDelegateLock()) {
getDelegate().getCurrentButton().removeItemListener(this);
getDelegate().setRadioButton(g != null);
getDelegate().getCurrentButton().addItemListener(this);
}
repaintPeer();
}
@Override
public void setLabel(final String label) {
synchronized (getDelegateLock()) {
getDelegate().setText(label);
}
}
@Override
public void setState(final boolean state) {
synchronized (getDelegateLock()) {
getDelegate().setSelected(state);
}
repaintPeer();
}
@Override
public boolean isFocusable() {
return true;
}
@SuppressWarnings("serial")// Safe: outer class is non-serializable.
final class CheckboxDelegate extends JComponent {
private final JCheckBox cb;
private final JRadioButton rb;
CheckboxDelegate() {
super();
cb = new JCheckBox() {
@Override
public boolean hasFocus() {
return getTarget().hasFocus();
}
};
rb = new JRadioButton() {
@Override
public boolean hasFocus() {
return getTarget().hasFocus();
}
};
setLayout(null);
setRadioButton(false);
add(rb);
add(cb);
}
@Override
public void setEnabled(final boolean enabled) {
super.setEnabled(enabled);
rb.setEnabled(enabled);
cb.setEnabled(enabled);
}
@Override
public void setOpaque(final boolean isOpaque) {
super.setOpaque(isOpaque);
rb.setOpaque(isOpaque);
cb.setOpaque(isOpaque);
}
@Override
@Deprecated
public void reshape(final int x, final int y, final int w,
final int h) {
super.reshape(x, y, w, h);
cb.setBounds(0, 0, w, h);
rb.setBounds(0, 0, w, h);
}
@Override
public Dimension getPreferredSize() {
return getCurrentButton().getPreferredSize();
}
@Override
@Transient
public Dimension getMinimumSize() {
return getCurrentButton().getMinimumSize();
}
void setRadioButton(final boolean showRadioButton) {
rb.setVisible(showRadioButton);
cb.setVisible(!showRadioButton);
}
@Transient
JToggleButton getCurrentButton() {
return cb.isVisible() ? cb : rb;
}
void setText(final String label) {
cb.setText(label);
rb.setText(label);
}
void setSelected(final boolean state) {
cb.setSelected(state);
rb.setSelected(state);
}
}
}
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