org.csstudio.autocomplete.ui.preferences.PreferencePage.java Source code

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Here is the source code for org.csstudio.autocomplete.ui.preferences.PreferencePage.java

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/*******************************************************************************
 * Copyright (c) 2010-2016 ITER Organization.
 * 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
 ******************************************************************************/
package org.csstudio.autocomplete.ui.preferences;

import org.csstudio.autocomplete.ui.AutoCompleteUIPlugin;
import org.csstudio.autocomplete.ui.Messages;
import org.eclipse.core.runtime.preferences.InstanceScope;
import org.eclipse.jface.preference.FieldEditorPreferencePage;
import org.eclipse.jface.preference.StringFieldEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
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.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipse.ui.preferences.ScopedPreferenceStore;

/**
 * Preference Page, registered in plugin.xml
 *
 * @author Fred Arnaud (Sopra Group)
 */
public class PreferencePage extends FieldEditorPreferencePage implements IWorkbenchPreferencePage {

    /** Initialize */
    public PreferencePage() {
        super(FieldEditorPreferencePage.GRID);
        setPreferenceStore(new ScopedPreferenceStore(InstanceScope.INSTANCE, AutoCompleteUIPlugin.PLUGIN_ID));
        setMessage(Messages.PrefPage_Title);
    }

    /** {@inheritDoc} */
    @Override
    public void init(IWorkbench workbench) {
        // NOP
    }

    /** {@inheritDoc} */
    @Override
    protected void createFieldEditors() {
        final Composite parent = getFieldEditorParent();

        addField(new StringFieldEditor(Preferences.HISTORY_SIZE, Messages.PrefPage_HistorySize, parent));

        final Button clearHistory = new Button(parent, SWT.PUSH);
        clearHistory.setText(Messages.PrefPage_ClearHistory);
        clearHistory.setLayoutData(new GridData());
        clearHistory.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(final SelectionEvent e) {
                AutoCompleteUIPlugin.getDefault().clearSettings();
            }
        });

        final Composite noteWrapper = new Composite(parent, SWT.NONE);
        noteWrapper.setLayoutData(new GridData());
        noteWrapper.setLayout(new GridLayout(2, false));

        final Label noteLabel = new Label(noteWrapper, SWT.NONE);
        FontData fontData = noteLabel.getFont().getFontData()[0];
        fontData.setStyle(SWT.BOLD);
        noteLabel.setFont(new Font(parent.getDisplay(), fontData));
        noteLabel.setText("Note: ");

        final Text note = new Text(noteWrapper, SWT.MULTI | SWT.READ_ONLY);
        note.setBackground(parent.getBackground());
        note.setText(
                "The 'History size' value is the maximum number of entries in the History.\nEach entry is stored only once and the entries of the History are sorted \naccording to their occurrence.");
    }

}