/*
* Copyright (c) 2004-2006 Marco Maccaferri and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Marco Maccaferri - initial API and implementation
*/
package org.eclipsetrader.yahoo.internal.ui.preferences;
import java.io.InputStream;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamSource;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.jface.viewers.CheckStateChangedEvent;
import org.eclipse.jface.viewers.CheckboxTreeViewer;
import org.eclipse.jface.viewers.ICheckStateListener;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Spinner;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipsetrader.yahoo.internal.YahooActivator;
import org.eclipsetrader.yahoo.internal.news.Category;
import org.eclipsetrader.yahoo.internal.news.Page;
public class NewsPreferencesPage extends PreferencePage implements IWorkbenchPreferencePage {
private Spinner interval;
private Spinner hoursAsRecent;
private Button updateNews;
private CheckboxTreeViewer providers;
/* (non-Javadoc)
* @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
*/
@Override
public void init(IWorkbench workbench) {
}
/* (non-Javadoc)
* @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)
*/
@Override
protected Control createContents(Composite parent) {
Composite content = new Composite(parent, SWT.NONE);
GridLayout gridLayout = new GridLayout(2, false);
gridLayout.marginWidth = gridLayout.marginHeight = 0;
content.setLayout(gridLayout);
Composite group = new Composite(content, SWT.NONE);
gridLayout = new GridLayout(3, false);
gridLayout.marginWidth = gridLayout.marginHeight = 0;
group.setLayout(gridLayout);
group.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false, 2, 1));
Label label = new Label(group, SWT.NONE);
label.setText("Update every");
interval = new Spinner(group, SWT.BORDER);
interval.setMinimum(1);
interval.setMaximum(9999);
label = new Label(group, SWT.NONE);
label.setText("minute(s)");
group = new Composite(content, SWT.NONE);
gridLayout = new GridLayout(3, false);
gridLayout.marginWidth = gridLayout.marginHeight = 0;
group.setLayout(gridLayout);
group.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false, 2, 1));
label = new Label(group, SWT.NONE);
label.setText("Consider a news as recent for");
hoursAsRecent = new Spinner(group, SWT.BORDER);
hoursAsRecent.setMinimum(0);
hoursAsRecent.setMaximum(9999);
label = new Label(group, SWT.NONE);
label.setText("hour(s)");
updateNews = new Button(content, SWT.CHECK);
updateNews.setText("Update security news");
label = new Label(content, SWT.NONE);
label.setText("Subscriptions:");
label.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false, 2, 1));
providers = new CheckboxTreeViewer(content, SWT.SINGLE | SWT.BORDER | SWT.FULL_SELECTION);
GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1);
gridData.heightHint = providers.getTree().getItemHeight() * 15 + providers.getTree().getBorderWidth() * 2;
providers.getControl().setLayoutData(gridData);
providers.setContentProvider(new NewsContentProvider());
providers.setLabelProvider(new LabelProvider());
providers.setSorter(new ViewerSorter());
providers.setUseHashlookup(true);
providers.addCheckStateListener(new ICheckStateListener() {
@Override
public void checkStateChanged(CheckStateChangedEvent event) {
if (event.getElement() instanceof Category) {
Page[] pages = ((Category) event.getElement()).getPages();
for (int i = 0; i < pages.length; i++) {
providers.setChecked(pages[i], event.getChecked());
}
}
else if (event.getElement() instanceof Page) {
Category category = ((Page) event.getElement()).getParent();
boolean allChecked = true;
boolean someChecked = false;
for (Page page : category.getPages()) {
boolean checked = providers.getChecked(page);
someChecked = someChecked || checked;
allChecked = allChecked && checked;
}
providers.setChecked(category, someChecked);
providers.setGrayed(category, !allChecked);
}
}
});
performDefaults();
return content;
}
/* (non-Javadoc)
* @see org.eclipse.jface.preference.PreferencePage#performDefaults()
*/
@Override
protected void performDefaults() {
IPreferenceStore store = YahooActivator.getDefault().getPreferenceStore();
interval.setSelection(store.getInt(YahooActivator.PREFS_NEWS_UPDATE_INTERVAL));
hoursAsRecent.setSelection(store.getInt(YahooActivator.PREFS_HOURS_AS_RECENT));
updateNews.setSelection(store.getBoolean(YahooActivator.PREFS_UPDATE_SECURITIES_NEWS));
try {
JAXBContext jaxbContext = JAXBContext.newInstance(Category[].class);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
InputStream inputStream = FileLocator.openStream(YahooActivator.getDefault().getBundle(), new Path("data/news_feeds.xml"), false);
JAXBElement<Category[]> element = unmarshaller.unmarshal(new StreamSource(inputStream), Category[].class);
providers.setInput(element.getValue());
providers.expandAll();
for (Category category : element.getValue()) {
boolean allChecked = true;
boolean someChecked = false;
for (Page page : category.getPages()) {
boolean checked = store.getBoolean(YahooActivator.PREFS_SUBSCRIBE_PREFIX + page.getId());
someChecked = someChecked || checked;
allChecked = allChecked && checked;
providers.setChecked(page, checked);
}
providers.setChecked(category, someChecked);
providers.setGrayed(category, !allChecked);
}
} catch (Exception e) {
Status status = new Status(IStatus.WARNING, YahooActivator.PLUGIN_ID, 0, "Error reading feed sources", e); //$NON-NLS-1$
YahooActivator.getDefault().getLog().log(status);
}
super.performDefaults();
}
/* (non-Javadoc)
* @see org.eclipse.jface.preference.PreferencePage#performOk()
*/
@Override
public boolean performOk() {
IPreferenceStore store = YahooActivator.getDefault().getPreferenceStore();
store.setValue(YahooActivator.PREFS_NEWS_UPDATE_INTERVAL, interval.getSelection());
store.setValue(YahooActivator.PREFS_HOURS_AS_RECENT, hoursAsRecent.getSelection());
store.setValue(YahooActivator.PREFS_UPDATE_SECURITIES_NEWS, updateNews.getSelection());
Category[] input = (Category[]) providers.getInput();
for (Category category : input) {
for (Page page : category.getPages()) {
store.setValue(YahooActivator.PREFS_SUBSCRIBE_PREFIX + page.getId(), providers.getChecked(page));
}
}
return super.performOk();
}
}