WebSearchPage.java :  » IDE-Eclipse » help » org » eclipse » help » ui » internal » search » Java Open Source

/*******************************************************************************
 * Copyright (c) 2000, 2007 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.help.ui.internal.search;

import org.eclipse.help.ui.RootScopePage;
import org.eclipse.help.ui.internal.Messages;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

/**
 * Web serch participant in the federated search.
 */
public class WebSearchPage extends RootScopePage {
  private Text urlText;

  /**
   * Default constructor.
   */
  public WebSearchPage() {
  }

  protected int createScopeContents(Composite parent) {
    //Font font = parent.getFont();
    initializeDialogUnits(parent);

    Label label = new Label(parent, SWT.NULL);
    label.setText(Messages.WebSearchPage_label); 
    GridData gd = new GridData(GridData.VERTICAL_ALIGN_BEGINNING);
    label.setLayoutData(gd);
    urlText = new Text(parent, SWT.MULTI | SWT.WRAP | SWT.V_SCROLL
        | SWT.BORDER);
    gd = new GridData(GridData.FILL_HORIZONTAL);
    gd.heightHint = 64;
    gd.widthHint = 200;
    urlText.setLayoutData(gd);
    urlText.addModifyListener(new ModifyListener() {
      public void modifyText(ModifyEvent e) {
        validate();
      }
    });
    urlText.setEditable(getEngineDescriptor().isUserDefined());
    new Label(parent, SWT.NULL);
    label = new Label(parent, SWT.WRAP);
    label.setText(Messages.WebSearchPage_info); 
    gd = new GridData(GridData.FILL_HORIZONTAL);
    gd.widthHint = 100;
    label.setLayoutData(gd);
    applyDialogFont(parent);
    updateControls();
    return 2;
  }

  /* (non-Javadoc)
   * @see org.eclipse.help.ui.RootScopePage#initializeDefaults(org.eclipse.jface.preference.IPreferenceStore)
   */
  protected void initializeDefaults(IPreferenceStore store) {
    super.initializeDefaults(store);
    String template = (String) getEngineDescriptor().getParameters().get(
        WebSearchScopeFactory.P_URL);
    if (template != null)
      store
          .setDefault(getStoreKey(WebSearchScopeFactory.P_URL),
              template);
  }

  /* (non-Javadoc)
   * @see org.eclipse.jface.preference.PreferencePage#performDefaults()
   */
  protected void performDefaults() {
    getPreferenceStore().setToDefault(
        getStoreKey(WebSearchScopeFactory.P_URL));
    updateControls();
    super.performDefaults();
  }

  private void updateControls() {
    String template = getPreferenceStore().getString(
        getStoreKey(WebSearchScopeFactory.P_URL));
    urlText.setText(template != null ? template : "http://"); //$NON-NLS-1$
    validate();
  }

  private void validate() {
    String text = urlText.getText();
    setValid(text.length() > 0);
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.eclipse.jface.preference.IPreferencePage#performOk()
   */
  public boolean performOk() {
    String urlTemplate = urlText.getText();
    getPreferenceStore().setValue(getStoreKey(WebSearchScopeFactory.P_URL),
        urlTemplate);
    return super.performOk();
  }

  private String getStoreKey(String key) {
    return getEngineDescriptor().getId() + "." + key; //$NON-NLS-1$
  }
}