LabelTimeComposite.java

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 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2013 by Pentaho : http://www.pentaho.com
 *
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 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
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package org.pentaho.di.ui.trans.steps.elasticsearchbulk;

import java.util.ArrayList;
import java.util.concurrent.TimeUnit;

import org.apache.commons.lang.StringUtils;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.pentaho.di.core.Const;
import org.pentaho.di.ui.core.PropsUI;

/**
 * Label, numeric text input and drop down time unit selector
 *
 */
public class LabelTimeComposite extends Composite {
  private static final PropsUI props = PropsUI.getInstance();

  private Label wLabel;
  private Text wText;
  private CCombo wTimeUnit;

  private String lastValidValue = "";

  public LabelTimeComposite( Composite composite, String labelText, String toolTipText ) {
    super( composite, SWT.NONE );
    props.setLook( this );

    int middle = props.getMiddlePct();
    int threeQuarters = ( middle + 100 ) / 2;
    int margin = Const.MARGIN;

    FormLayout formLayout = new FormLayout();
    formLayout.marginWidth = 0;
    formLayout.marginHeight = 0;
    formLayout.marginTop = 0;
    formLayout.marginBottom = 0;

    this.setLayout( formLayout );

    wText = new Text( this, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    FormData fdText = new FormData();
    fdText.left = new FormAttachment( middle, margin );
    fdText.right = new FormAttachment( threeQuarters, 0 );
    wText.setLayoutData( fdText );
    wText.setToolTipText( toolTipText );

    wTimeUnit = new CCombo( this, SWT.SINGLE | SWT.DROP_DOWN | SWT.BORDER | SWT.LEFT );
    FormData fdCombo = new FormData();
    fdCombo.left = new FormAttachment( threeQuarters, margin );
    fdCombo.right = new FormAttachment( 100, 0 );
    wTimeUnit.setEditable( false );
    wTimeUnit.setLayoutData( fdCombo );
    wTimeUnit.setItems( getTimeUnits() );
    wTimeUnit.setToolTipText( toolTipText );

    wLabel = new Label( this, SWT.RIGHT );
    props.setLook( wLabel );
    wLabel.setText( labelText );
    FormData fdLabel = new FormData();
    fdLabel.left = new FormAttachment( 0, 0 );
    fdLabel.right = new FormAttachment( middle, 0 );
    fdLabel.top = new FormAttachment( wText, 0, SWT.CENTER );
    wLabel.setLayoutData( fdLabel );
    wLabel.setToolTipText( toolTipText );

    wText.addModifyListener( new ModifyListener() {
      public void modifyText( ModifyEvent e ) {
        if ( !StringUtils.isNumeric( wText.getText() ) ) {
          wText.setText( lastValidValue );
        } else {
          lastValidValue = wText.getText();
        }
      }
    } );
  }

  private String[] getTimeUnits() {
    ArrayList<String> timeUnits = new ArrayList<String>();
    for ( TimeUnit timeUnit : TimeUnit.values() ) {
      timeUnits.add( timeUnit.toString() );
    }
    return timeUnits.toArray( new String[timeUnits.size()] );
  }

  public TimeUnit getTimeUnit() {
    return TimeUnit.valueOf( wTimeUnit.getItem( wTimeUnit.getSelectionIndex() ) );
  }

  public void setTimeUnit( TimeUnit tu ) {
    for ( int i = 0; i < wTimeUnit.getItemCount(); i++ ) {
      if ( tu.toString().equals( wTimeUnit.getItem( i ) ) ) {
        wTimeUnit.select( i );
        break;
      }
    }
  }

  public void addModifyListener( ModifyListener lsMod ) {
    wText.addModifyListener( lsMod );
  }

  public void addSelectionListener( SelectionAdapter lsDef ) {
    wText.addSelectionListener( lsDef );
  }

  public void setText( String name ) {
    wText.setText( name );
  }

  public String getText() {
    return wText.getText();
  }

  public void setEchoChar( char c ) {
    wText.setEchoChar( c );
  }

  public void setEnabled( boolean flag ) {
    wText.setEnabled( flag );
    wLabel.setEnabled( flag );
  }

  public boolean setFocus() {
    return wText.setFocus();
  }

  public void addTraverseListener( TraverseListener tl ) {
    wText.addTraverseListener( tl );
  }

  public Text getTextWidget() {
    return wText;
  }

  public Label getLabelWidget() {
    return wLabel;
  }
}