org.eclipse.blockchain.ui/src/org/eclipse/blockchain/ui/preference/EnvironmentPreferencePage.java

/*
 * Copyright (c) Robert Bosch GmbH. All rights reserved.
 */
package org.eclipse.blockchain.ui.preference;

import org.eclipse.blockchain.core.BlockchainCore;
import org.eclipse.blockchain.core.SecoBlocksPreferenceConstants;
import org.eclipse.blockchain.core.events.BlockchainEnvironmentChangedTrigger;
import org.eclipse.blockchain.ui.Activator;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.preferences.InstanceScope;
import org.eclipse.jface.preference.PreferencePage;
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.Group;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.osgi.service.prefs.BackingStoreException;

/**
 * @author ADG5COB
 */
public class EnvironmentPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

  private String selectedOption;

  /**
   * {@inheritDoc}
   */
  @Override
  public void init(final IWorkbench workbench) {
    this.selectedOption = Platform.getPreferencesService().getString(SecoBlocksPreferenceConstants.SECOBLOCKS_PREF_NODE,
        SecoBlocksPreferenceConstants.ENVIRONMENT_PREF_KEY,
        SecoBlocksPreferenceConstants.EnvironmentType.EMBEDDED_EVM.toString(), null);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected Control createContents(final Composite parent) {
    Composite container = new Composite(parent, SWT.NONE);
    container.setLayout(new GridLayout(1, true));
    container.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

    Group environmentGroup = new Group(container, SWT.NONE);
    environmentGroup.setText("Choose The Environment");
    environmentGroup.setLayout(new GridLayout(1, true));
    environmentGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));

    Button embeddedEVM = new Button(environmentGroup, SWT.RADIO);
    embeddedEVM.setText(SecoBlocksPreferenceConstants.EnvironmentType.EMBEDDED_EVM.toString());
    embeddedEVM.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));

    Button gethClient = new Button(environmentGroup, SWT.RADIO);
    gethClient.setText(SecoBlocksPreferenceConstants.EnvironmentType.GETH_CLIENT.toString());
    gethClient.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));

    if (this.selectedOption.equals(SecoBlocksPreferenceConstants.EnvironmentType.EMBEDDED_EVM.toString())) {
      embeddedEVM.setSelection(true);
    }
    else if (this.selectedOption.equals(SecoBlocksPreferenceConstants.EnvironmentType.GETH_CLIENT.toString())) {
      gethClient.setSelection(true);
    }

    /**
     * Radio Button Listeneres
     */
    embeddedEVM.addSelectionListener(new SelectionAdapter() {

      /**
       * {@inheritDoc}
       */
      @Override
      public void widgetSelected(final SelectionEvent e) {
        EnvironmentPreferencePage.this.selectedOption =
            SecoBlocksPreferenceConstants.EnvironmentType.EMBEDDED_EVM.toString();
        embeddedEVM.setSelection(true);
        gethClient.setSelection(false);
      }
    });

    gethClient.addSelectionListener(new SelectionAdapter() {

      /**
       * {@inheritDoc}
       */
      @Override
      public void widgetSelected(final SelectionEvent e) {
        EnvironmentPreferencePage.this.selectedOption =
            SecoBlocksPreferenceConstants.EnvironmentType.GETH_CLIENT.toString();
        embeddedEVM.setSelection(false);
        gethClient.setSelection(true);
      }
    });

    return container;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public boolean performOk() {
    InstanceScope.INSTANCE.getNode(SecoBlocksPreferenceConstants.SECOBLOCKS_PREF_NODE)
        .put(SecoBlocksPreferenceConstants.ENVIRONMENT_PREF_KEY, this.selectedOption);
    new BlockchainEnvironmentChangedTriggerChild().triggerEnvChange(this.selectedOption);
    try {
      InstanceScope.INSTANCE.getNode(SecoBlocksPreferenceConstants.SECOBLOCKS_PREF_NODE).flush();
    }
    catch (BackingStoreException e) {
      BlockchainCore.getInstance().logException(Activator.PLUGIN_ID, e.getMessage(), e);
    }
    return super.performOk();
  }

  class BlockchainEnvironmentChangedTriggerChild extends BlockchainEnvironmentChangedTrigger {

    public void triggerEnvChange(final String newEnvironment) {
      triggerEnvironmentChange(newEnvironment);
    }
  }
}