edu.panimalar.ocr.tamiocr.ui.preferences.PreferencePage.java Source code

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Here is the source code for edu.panimalar.ocr.tamiocr.ui.preferences.PreferencePage.java

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/*******************************************************************************
 * Copyright (c) 2000, 2011. 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: 
 *       Fizer Khan, Yasmine - initial API and implementation
 *******************************************************************************/

package edu.panimalar.ocr.tamiocr.ui.preferences;

import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
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.FileDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

import edu.panimalar.ocr.tamilocr.TamilOCRConstants;
import edu.panimalar.ocr.tamilocr.TamilOCRPlugin;

public class PreferencePage extends org.eclipse.jface.preference.PreferencePage
        implements IWorkbenchPreferencePage {

    private Label tamilOCRPathLabel;
    private Text tamilOCRPathText;
    private Button tamilOCRPathBrowse;

    public PreferencePage() {
    }

    public PreferencePage(String title) {
        super(title);
    }

    public PreferencePage(String title, ImageDescriptor image) {
        super(title, image);
    }

    @Override
    public void init(IWorkbench workbench) {
    }

    @Override
    protected Control createContents(Composite parent) {
        Composite group = new Composite(parent, SWT.NULL);
        GridLayout layout = new GridLayout();
        layout.numColumns = 3;
        group.setLayout(layout);
        GridData data = new GridData();
        data.horizontalAlignment = GridData.FILL;
        group.setLayoutData(data);

        // tamil ocr path label
        tamilOCRPathLabel = new Label(group, SWT.NONE);
        tamilOCRPathLabel.setText("Tamil OCR exe path:");

        // tamil ocr path text
        tamilOCRPathText = new Text(group, SWT.SINGLE | SWT.BORDER);
        tamilOCRPathText.setFont(group.getFont());
        GridData gd = new GridData(GridData.FILL_HORIZONTAL);
        gd.horizontalSpan = 1;
        tamilOCRPathText.setLayoutData(gd);
        tamilOCRPathText.setEditable(false);

        // tamil ocr path browse
        tamilOCRPathBrowse = new Button(group, SWT.NULL);
        tamilOCRPathBrowse.setText("Browse");
        gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
        gd.horizontalSpan = 1;
        tamilOCRPathBrowse.setLayoutData(gd);
        tamilOCRPathBrowse.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                FileDialog fd = new FileDialog(getShell(), SWT.OPEN | SWT.SINGLE);
                fd.setFilterExtensions(new String[] { "*.exe", "*.EXE" });
                String path = fd.open();
                if (path == null) { // cancel
                    return;
                }
                tamilOCRPathText.setText(path);
            }
        });

        initControls();
        return group;
    }

    private void initControls() {
        // Initialize the text
        IPreferenceStore prefStore = TamilOCRPlugin.getDefault().getPreferenceStore();
        tamilOCRPathText.setText(prefStore.getString(TamilOCRConstants.TAMILOCR_EXE_PATH_PREF));
    }

    @Override
    public boolean performOk() {
        // Save the tamil ocr path
        String path = tamilOCRPathBrowse.getText().trim();
        if (path.length() > 0) {
            IPreferenceStore prefStore = TamilOCRPlugin.getDefault().getPreferenceStore();
            prefStore.setValue(TamilOCRConstants.TAMILOCR_EXE_PATH_PREF, tamilOCRPathText.getText());
        }
        return true;
    }
}