text: /*! ******************************************************************************
   *
   * Pentaho Data Integration
   *
   * Copyright (C) 2002-2017 by Hitachi Vantara : http://www.pentaho.com
   *
   *******************************************************************************
   *
   * 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
   * limitations under the License.
   *
   ******************************************************************************/
  
  package org.pentaho.di.ui.trans.steps.mappingoutput;
  
  import org.eclipse.swt.SWT;
  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.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.core.util.Utils;
  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.mappingoutput.MappingOutputMeta;
  import org.pentaho.di.ui.trans.step.BaseStepDialog;
  
  public class MappingOutputDialog extends BaseStepDialog implements StepDialogInterface {
    private static Class<?> PKG = MappingOutputMeta.class; // for i18n purposes, needed by Translator2!!
  
    private MappingOutputMeta input;
  
    public MappingOutputDialog( Shell parent, Object in, TransMeta tr, String sname ) {
      super( parent, (BaseStepMeta) in, tr, sname );
      input = (MappingOutputMeta) 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, "MappingOutputDialog.Shell.Title" ) );
  
      int middle = props.getMiddlePct();
      int margin = Const.MARGIN;
  
      // Stepname line
      wlStepname = new Label( shell, SWT.RIGHT );
      wlStepname.setText( BaseMessages.getString( PKG, "MappingOutputDialog.Stepname.Label" ) );
      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 );
  
      // Some 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" ) );
  
      setButtonPositions( new Button[] { wOK, wCancel, }, margin, wStepname );
  
      // 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 );
  
      // 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;
    }
  
    /**
     * Copy information from the meta-data input to the dialog fields.
     */
    public void getData() {
      wStepname.selectAll();
      wStepname.setFocus();
    }
  
    private void cancel() {
      stepname = null;
      input.setChanged( changed );
      dispose();
    }
  
    private void ok() {
      if ( Utils.isEmpty( wStepname.getText() ) ) {
        return;
      }
  
      stepname = wStepname.getText(); // return value
  
      dispose();
    }
  }
  