/*
* This file is part of LCMC
*
* Copyright (C) 2012, Rastislav Levrinc.
*
* LCMC is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* DRBD Management Console 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with drbd; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package lcmc.cluster.ui.widget;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.ItemSelectable;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import javax.inject.Inject;
import javax.inject.Named;
import javax.swing.AbstractButton;
import javax.swing.ButtonGroup;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.text.Document;
import lcmc.common.domain.AccessMode;
import lcmc.common.domain.StringValue;
import lcmc.common.domain.Value;
import lcmc.common.ui.Access;
import lcmc.common.ui.utils.MyButton;
import lcmc.common.ui.utils.SwingUtils;
import lcmc.common.ui.utils.WidgetListener;
/**
* An implementation of a field where user can enter new value. The
* field can be Textfield or combo box, depending if there are values
* too choose from.
*/
@Named
public final class RadioGroup extends GenericWidget<JComponent> {
private Value radioGroupValue;
/** Radio group hash, from string that is displayed to the object. */
private final Map<String, Value> radioGroupHash = new HashMap<String, Value>();
/** Name to component hash. */
private final Map<String, JComponent> componentsHash = new HashMap<String, JComponent>();
private final ReadWriteLock mComponentsLock = new ReentrantReadWriteLock();
private final Lock mComponentsReadLock = mComponentsLock.readLock();
private final Lock mComponentsWriteLock = mComponentsLock.writeLock();
@Inject
private SwingUtils swingUtils;
@Inject
private Access access;
public void init(final Value selectedValue,
final Value[] items,
final String regexp,
final int width,
final AccessMode enableAccessMode,
final MyButton fieldButton) {
super.init(regexp, enableAccessMode, fieldButton);
addComponent(getRadioGroup(selectedValue, items), width);
}
protected JComponent getRadioGroup(final Value selectedValue, final Value[] items) {
final ButtonGroup group = new ButtonGroup();
final JPanel radioPanel = new JPanel(new GridLayout(1, 1));
mComponentsWriteLock.lock();
componentsHash.clear();
if (items != null) {
for (final Value item : items) {
final JRadioButton rb = new JRadioButton(item.getValueForGui());
radioGroupHash.put(item.getValueForConfig(), item);
rb.setActionCommand(item.getValueForConfig());
group.add(rb);
radioPanel.add(rb);
componentsHash.put(item.getValueForConfig(), rb);
if (item.equals(selectedValue)) {
rb.setSelected(true);
radioGroupValue = selectedValue;
}
rb.addActionListener(new ActionListener() {
@Override
public void actionPerformed(final ActionEvent e) {
mComponentsReadLock.lock();
try {
radioGroupValue = radioGroupHash.get(e.getActionCommand());
} finally {
mComponentsReadLock.unlock();
}
}
});
}
}
mComponentsWriteLock.unlock();
return radioPanel;
}
/**
* Enables/Disables component in a group of components identified by
* specified string. This works only with RADIOGROUP at the moment.
*/
@Override
public void setEnabled(final String s, final boolean enabled) {
final boolean accessible = access.isAccessible(getEnableAccessMode());
mComponentsReadLock.lock();
final JComponent c;
try {
c = componentsHash.get(s);
} finally {
mComponentsReadLock.unlock();
}
if (c != null) {
swingUtils.invokeLater(new Runnable() {
@Override
public void run() {
c.setEnabled(isEnablePredicate() && accessible);
}
});
}
final JLabel label = getLabel();
if (label != null) {
label.setEnabled(accessible);
}
}
/**
* Sets visible/invisible a component in a group of components identified
* by specified string. This works only with RADIOGROUP in a moment.
*/
public void setVisible(final String s, final boolean visible) {
mComponentsReadLock.lock();
final JComponent c;
try {
c = componentsHash.get(s);
} finally {
mComponentsReadLock.unlock();
}
if (c != null) {
c.setVisible(visible);
}
}
/**
* Returns string value. If object value is null, returns empty string (not null).
*/
@Override
public String getStringValue() {
final Object o = getValue();
if (o == null) {
return "";
}
return o.toString();
}
/** Return value, that user have chosen in the field or typed in. */
@Override
protected Value getValueInternal() {
final Value value = radioGroupValue;
if (value == null || value.isNothingSelected()) {
return null;
}
return value;
}
/** Sets component visible or invisible. */
@Override
protected void setComponentsVisible(final boolean visible) {
final JComponent comp = getInternalComponent();
final JLabel label = getLabel();
swingUtils.invokeLater(new Runnable() {
@Override
public void run() {
if (label != null) {
label.setVisible(visible);
}
comp.setVisible(visible);
mComponentsReadLock.lock();
try {
for (final JComponent c : componentsHash.values()) {
c.setVisible(visible);
}
} finally {
mComponentsReadLock.unlock();
}
repaint();
}
});
}
@Override
public boolean isEditable() {
return false;
}
@Override
protected void setValueAndWait0(final Value item) {
if (item != null) {
mComponentsReadLock.lock();
final JRadioButton rb;
try {
rb = (JRadioButton) componentsHash.get(item.getValueForConfig());
} finally {
mComponentsReadLock.unlock();
}
if (rb != null) {
rb.setSelected(true);
}
radioGroupValue = item;
}
}
@Override
public Document getDocument() {
return null;
}
@Override
public void addListeners(final WidgetListener widgetListener) {
getWidgetListeners().add(widgetListener);
mComponentsReadLock.lock();
try {
final ItemListener il = getItemListener(widgetListener);
for (final JComponent c : componentsHash.values()) {
((ItemSelectable) c).addItemListener(il);
}
} finally {
mComponentsReadLock.unlock();
}
}
@Override
protected void setComponentBackground(final Color backgroundColor, final Color compColor) {
getInternalComponent().setBackground(backgroundColor);
mComponentsReadLock.lock();
try {
for (final JComponent c : componentsHash.values()) {
c.setBackground(backgroundColor);
}
} finally {
mComponentsReadLock.unlock();
}
}
@Override
public void setBackgroundColor(final Color bg) {
final JComponent comp = getInternalComponent();
swingUtils.invokeLater(new Runnable() {
@Override
public void run() {
setBackground(bg);
comp.setBackground(bg);
mComponentsReadLock.lock();
try {
for (final JComponent c : componentsHash.values()) {
c.setBackground(bg);
}
} finally {
mComponentsReadLock.unlock();
}
}
});
}
/** Cleanup whatever would cause a leak. */
@Override
public void cleanup() {
getWidgetListeners().clear();
mComponentsReadLock.lock();
try {
for (final JComponent c : componentsHash.values()) {
for (final ItemListener il : ((AbstractButton) c).getItemListeners()) {
((ItemSelectable) c).removeItemListener(il);
}
}
} finally {
mComponentsReadLock.unlock();
}
}
@Override
protected void setComponentsEnabled(final boolean enabled) {
super.setComponentsEnabled(enabled);
mComponentsReadLock.lock();
try {
for (final JComponent c : componentsHash.values()) {
c.setEnabled(enabled);
}
} finally {
mComponentsReadLock.unlock();
}
}
@Override
protected ItemListener getItemListener(final WidgetListener wl) {
return new ItemListener() {
@Override
public void itemStateChanged(final ItemEvent e) {
if (wl.isEnabled()
&& e.getStateChange() == ItemEvent.SELECTED) {
final Value value = new StringValue(((AbstractButton) e.getItem()).getText());
final Thread t = new Thread(new Runnable() {
@Override
public void run() {
wl.check(value);
}
});
t.start();
}
}
};
}
}