Edi2XmlDialog.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
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 *    http://www.apache.org/licenses/LICENSE-2.0
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 * distributed under the License is distributed on an "AS IS" BASIS,
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package org.pentaho.di.ui.trans.steps.edi2xml;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.ShellAdapter;
import org.eclipse.swt.events.ShellEvent;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.pentaho.di.core.Const;
import org.pentaho.di.i18n.BaseMessages;
import org.pentaho.di.trans.TransMeta;
import org.pentaho.di.trans.step.BaseStepMeta;
import org.pentaho.di.trans.step.StepDialogInterface;
import org.pentaho.di.trans.steps.edi2xml.Edi2XmlMeta;
import org.pentaho.di.ui.core.widget.ComboVar;
import org.pentaho.di.ui.core.widget.TextVar;
import org.pentaho.di.ui.trans.step.BaseStepDialog;

public class Edi2XmlDialog extends BaseStepDialog implements StepDialogInterface {

  private static Class<?> PKG = Edi2XmlMeta.class; // for i18n purposes

  private Edi2XmlMeta input;

  // output field name
  private Label wlXmlField;
  private TextVar wXmlField;
  private FormData fdlXmlField, fdXmlField;

  private ComboVar wEdiField;

  public Edi2XmlDialog( Shell parent, Object in, TransMeta transMeta, String sname ) {
    super( parent, (BaseStepMeta) in, transMeta, sname );
    input = (Edi2XmlMeta) in;
  }

  public String open() {
    Shell parent = getParent();
    Display display = parent.getDisplay();

    shell = new Shell( parent, SWT.DIALOG_TRIM | SWT.RESIZE | SWT.MIN | SWT.MAX );
    props.setLook( shell );
    setShellImage( shell, input );

    ModifyListener lsMod = new ModifyListener() {
      public void modifyText( ModifyEvent e ) {
        input.setChanged();
      }
    };
    changed = input.hasChanged();

    FormLayout formLayout = new FormLayout();
    formLayout.marginWidth = Const.FORM_MARGIN;
    formLayout.marginHeight = Const.FORM_MARGIN;

    shell.setLayout( formLayout );
    shell.setText( BaseMessages.getString( PKG, "Edi2Xml.Shell.Title" ) );

    int middle = props.getMiddlePct();
    int margin = Const.MARGIN;

    // Stepname line
    wlStepname = new Label( shell, SWT.RIGHT );
    wlStepname.setText( BaseMessages.getString( PKG, "System.Label.StepName" ) );
    props.setLook( wlStepname );
    fdlStepname = new FormData();
    fdlStepname.left = new FormAttachment( 0, 0 );
    fdlStepname.right = new FormAttachment( middle, -margin );
    fdlStepname.top = new FormAttachment( 0, margin );
    wlStepname.setLayoutData( fdlStepname );

    wStepname = new Text( shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    wStepname.setText( stepname );
    props.setLook( wStepname );
    wStepname.addModifyListener( lsMod );
    fdStepname = new FormData();
    fdStepname.left = new FormAttachment( middle, 0 );
    fdStepname.top = new FormAttachment( 0, margin );
    fdStepname.right = new FormAttachment( 100, 0 );
    wStepname.setLayoutData( fdStepname );

    // edifact field line
    Label wlEdiField = new Label( shell, SWT.RIGHT );
    wlEdiField.setText( BaseMessages.getString( PKG, "Edi2Xml.InputField.Label" ) );
    props.setLook( wlEdiField );
    FormData fdlEdiField = new FormData();
    fdlEdiField.left = new FormAttachment( 0, 0 );
    fdlEdiField.right = new FormAttachment( middle, -margin );
    fdlEdiField.top = new FormAttachment( wStepname, margin );
    wlEdiField.setLayoutData( fdlEdiField );

    wEdiField = new ComboVar( transMeta, shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    wEdiField.setToolTipText( BaseMessages.getString( PKG, "Edi2Xml.InputField.Tooltip" ) );
    props.setLook( wEdiField );
    wEdiField.addModifyListener( lsMod );
    FormData fdEdiField = new FormData();
    fdEdiField.left = new FormAttachment( middle, 0 );
    fdEdiField.top = new FormAttachment( wStepname, margin );
    fdEdiField.right = new FormAttachment( 100, 0 );
    wEdiField.setLayoutData( fdEdiField );
    wEdiField.addFocusListener( new FocusListener() {
      public void focusLost( org.eclipse.swt.events.FocusEvent e ) {
      }

      public void focusGained( org.eclipse.swt.events.FocusEvent e ) {
        Cursor busy = new Cursor( shell.getDisplay(), SWT.CURSOR_WAIT );
        shell.setCursor( busy );
        BaseStepDialog.getFieldsFromPrevious( wEdiField, transMeta, stepMeta );
        shell.setCursor( null );
        busy.dispose();
      }
    } );

    // xml output field value
    wlXmlField = new Label( shell, SWT.RIGHT );
    wlXmlField.setText( BaseMessages.getString( PKG, "Edi2Xml.OutputField.Label" ) );
    props.setLook( wlXmlField );
    fdlXmlField = new FormData();
    fdlXmlField.left = new FormAttachment( 0, 0 );
    fdlXmlField.right = new FormAttachment( middle, -margin );
    fdlXmlField.top = new FormAttachment( wEdiField, margin );
    wlXmlField.setLayoutData( fdlXmlField );

    wXmlField = new TextVar( transMeta, shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wXmlField );
    wXmlField.setToolTipText( BaseMessages.getString( PKG, "Edi2Xml.OutputField.Tooltip" ) );
    wXmlField.addModifyListener( lsMod );
    fdXmlField = new FormData();
    fdXmlField.left = new FormAttachment( middle, 0 );
    fdXmlField.right = new FormAttachment( 100, 0 );
    fdXmlField.top = new FormAttachment( wEdiField, margin );
    wXmlField.setLayoutData( fdXmlField );

    // OK and cancel buttons
    wOK = new Button( shell, SWT.PUSH );
    wOK.setText( BaseMessages.getString( PKG, "System.Button.OK" ) );
    wCancel = new Button( shell, SWT.PUSH );
    wCancel.setText( BaseMessages.getString( PKG, "System.Button.Cancel" ) );

    BaseStepDialog.positionBottomButtons( shell, new Button[] { wOK, wCancel }, margin, wXmlField );

    // Add listeners
    lsCancel = new Listener() {
      public void handleEvent( Event e ) {
        cancel();
      }
    };
    lsOK = new Listener() {
      public void handleEvent( Event e ) {
        ok();
      }
    };

    wCancel.addListener( SWT.Selection, lsCancel );
    wOK.addListener( SWT.Selection, lsOK );

    lsDef = new SelectionAdapter() {
      public void widgetDefaultSelected( SelectionEvent e ) {
        ok();
      }
    };

    wStepname.addSelectionListener( lsDef );
    wXmlField.addSelectionListener( lsDef );

    // Detect X or ALT-F4 or something that kills this window...
    shell.addShellListener( new ShellAdapter() {
      public void shellClosed( ShellEvent e ) {
        cancel();
      }
    } );

    // Set the shell size, based upon previous time...
    setSize();

    getData();
    input.setChanged( changed );

    shell.open();
    while ( !shell.isDisposed() ) {
      if ( !display.readAndDispatch() ) {
        display.sleep();
      }
    }
    return stepname;
  }

  // Read data and place it in the dialog
  public void getData() {
    wXmlField.setText( Const.NVL( input.getOutputField(), "" ) );
    wEdiField.setText( Const.NVL( input.getInputField(), "" ) );

    wStepname.selectAll();
    wStepname.setFocus();
  }

  private void cancel() {
    stepname = null;
    input.setChanged( changed );
    dispose();
  }

  // let the plugin know about the entered data
  private void ok() {
    stepname = wStepname.getText(); // return value
    input.setOutputField( wXmlField.getText() );
    input.setInputField( wEdiField.getText() );
    dispose();
  }
}