DummyPluginDialog.java

/*! ******************************************************************************
 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2016 by Pentaho : 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.
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package be.ibridge.kettle.dummy;

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.row.ValueMetaAndData;
import org.pentaho.di.trans.TransMeta;
import org.pentaho.di.trans.step.BaseStepMeta;
import org.pentaho.di.trans.step.StepDialogInterface;
import org.pentaho.di.ui.core.dialog.EnterValueDialog;
import org.pentaho.di.ui.trans.step.BaseStepDialog;

public class DummyPluginDialog extends BaseStepDialog implements StepDialogInterface {
  private DummyPluginMeta input;
  private ValueMetaAndData value;

  private Label wlValName;
  private Text wValName;
  private FormData fdlValName, fdValName;

  private Label wlValue;
  private Button wbValue;
  private Text wValue;
  private FormData fdlValue, fdbValue, fdValue;


  public DummyPluginDialog( Shell parent, Object in, TransMeta transMeta, String sname ) {
    super( parent, (BaseStepMeta) in, transMeta, sname );
    input = (DummyPluginMeta) in;
    value = input.getValue();
  }

  @Override
  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() {
      @Override
      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( Messages.getString( "DummyPluginDialog.Shell.Title" ) ); //$NON-NLS-1$

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

    // Stepname line
    wlStepname = new Label( shell, SWT.RIGHT );
    wlStepname.setText( Messages.getString( "DummyPluginDialog.StepName.Label" ) ); //$NON-NLS-1$
    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 );

    // ValName line
    wlValName = new Label( shell, SWT.RIGHT );
    wlValName.setText( Messages.getString( "DummyPluginDialog.ValueName.Label" ) ); //$NON-NLS-1$
    props.setLook( wlValName );
    fdlValName = new FormData();
    fdlValName.left = new FormAttachment( 0, 0 );
    fdlValName.right = new FormAttachment( middle, -margin );
    fdlValName.top = new FormAttachment( wStepname, margin );
    wlValName.setLayoutData( fdlValName );
    wValName = new Text( shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wValName );
    wValName.addModifyListener( lsMod );
    fdValName = new FormData();
    fdValName.left = new FormAttachment( middle, 0 );
    fdValName.right = new FormAttachment( 100, 0 );
    fdValName.top  = new FormAttachment( wStepname, margin );
    wValName.setLayoutData( fdValName );

    // Value line
    wlValue = new Label( shell, SWT.RIGHT );
    wlValue.setText( Messages.getString( "DummyPluginDialog.ValueToAdd.Label" ) ); //$NON-NLS-1$
    props.setLook( wlValue );
    fdlValue = new FormData();
    fdlValue.left = new FormAttachment( 0, 0 );
    fdlValue.right = new FormAttachment( middle, -margin );
    fdlValue.top = new FormAttachment( wValName, margin );
    wlValue.setLayoutData( fdlValue );

    wbValue = new Button( shell, SWT.PUSH | SWT.CENTER );
    props.setLook( wbValue );
    wbValue.setText( Messages.getString( "System.Button.Edit" ) ); //$NON-NLS-1$
    fdbValue = new FormData();
    fdbValue.right = new FormAttachment( 100, 0 );
    fdbValue.top  = new FormAttachment( wValName, margin );
    wbValue.setLayoutData( fdbValue );

    wValue = new Text( shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wValue );
    wValue.addModifyListener( lsMod );
    fdValue = new FormData();
    fdValue.left = new FormAttachment( middle, 0 );
    fdValue.right = new FormAttachment( wbValue, -margin );
    fdValue.top  = new FormAttachment( wValName, margin );
    wValue.setLayoutData( fdValue );

    wbValue.addSelectionListener( new SelectionAdapter() {
      @Override
      public void widgetSelected( SelectionEvent arg0 ) {
        ValueMetaAndData v = (ValueMetaAndData) value.clone();
        EnterValueDialog evd = new EnterValueDialog( shell, SWT.NONE, v.getValueMeta(), v.getValueData() );
        ValueMetaAndData newval = evd.open();
        if ( newval != null ) {
          value = newval;
          getData();
        }
      }
    } );

    // Some buttons
    wOK = new Button( shell, SWT.PUSH );
    wOK.setText( Messages.getString( "System.Button.OK" ) ); //$NON-NLS-1$
    wCancel = new Button( shell, SWT.PUSH );
    wCancel.setText( Messages.getString( "System.Button.Cancel" ) ); //$NON-NLS-1$

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

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

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

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

    wStepname.addSelectionListener( lsDef );
    wValName.addSelectionListener( lsDef );

    // Detect X or ALT-F4 or something that kills this window...
    shell.addShellListener(  new ShellAdapter() {
      @Override
      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 from input (TextFileInputInfo)
  public void getData() {
    wStepname.selectAll();
    if ( value != null ) {
      wValName.setText( value.getValueMeta().getName() );
      wValue.setText( value.toString() + " (" + value.toStringMeta() + ")" ); //$NON-NLS-1$ //$NON-NLS-2$
    }
  }

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

  private void ok() {
    stepname = wStepname.getText(); // return value
    value.getValueMeta().setName( wValName.getText() );
    input.setValue( value );
    dispose();
  }
}