Source Code : Validating On Key Typed Example

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Validating On Key Typed Example

/*
Code revised from Desktop Java Live:
http://www.sourcebeat.com/downloads/
*/

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

import com.jgoodies.binding.PresentationModel;
import com.jgoodies.binding.adapter.BasicComponentFactory;
import com.jgoodies.binding.value.ValueModel;
import com.jgoodies.forms.builder.DefaultFormBuilder;
import com.jgoodies.forms.layout.CellConstraints;
import com.jgoodies.forms.layout.FormLayout;
import com.jgoodies.validation.ValidationCapable;
import com.jgoodies.validation.ValidationResult;
import com.jgoodies.validation.util.DefaultValidationResultModel;
import com.jgoodies.validation.util.ValidationResultModel;
import com.jgoodies.validation.util.ValidationUtils;
import com.jgoodies.validation.view.ValidationResultViewFactory;

public class ValidatingOnKeyTypedExample extends JPanel {
    private Feed feed;
    private FeedPresentationModel feedPresentationModel;

    public ValidatingOnKeyTypedExample() {
        DefaultFormBuilder formBuilder = new DefaultFormBuilder(new FormLayout("right:pref, 3dlu, p:g"));
        formBuilder.setDefaultDialogBorder();

        createFeed();
        this.feedPresentationModel = new FeedPresentationModel(this.feed);
        ValueModel nameModel = this.feedPresentationModel.getModel("name");
        ValueModel feedModel = this.feedPresentationModel.getModel("feedUrl");
        ValueModel siteModel = this.feedPresentationModel.getModel("siteUrl");

        JTextField nameField = BasicComponentFactory.createTextField(nameModel, false);
        JTextField feedField = BasicComponentFactory.createTextField(feedModel, false);
        JTextField siteField = BasicComponentFactory.createTextField(siteModel, false);
        formBuilder.append("Name:", nameField);
        formBuilder.append("Site Url:", siteField);
        formBuilder.append("Feed Url:", feedField);

        JComponent validationResultsComponent = ValidationResultViewFactory.createReportList(this.feedPresentationModel.getValidationModel());
        formBuilder.appendRow("top:30dlu:g");

        CellConstraints cc = new CellConstraints();
        formBuilder.add(validationResultsComponent, cc.xywh(1, formBuilder.getRow() + 1, 3, 1, "fill, fill"));

        add(formBuilder.getPanel());
    }

    private void createFeed() {
        this.feed = new Feed();
        this.feed.setName("ClientJava.com");
        this.feed.setSiteUrl("http://www.clientjava.com/blog");
        this.feed.setFeedUrl("http://www.clientjava.com/blog/rss.xml");
    }

    private class FeedPresentationModel extends PresentationModel implements ValidationCapable {
        private ValidationResultModel validationResultModel;

        public FeedPresentationModel(Object bean) {
            super(bean);
            this.validationResultModel = new DefaultValidationResultModel();
            initEventHandling();
        }

        public ValidationResultModel getValidationModel() {
            return this.validationResultModel;
        }

        public ValidationResult validate() {
            ValidationResult validationResult = new ValidationResult();

            String name = (String) getModel("name").getValue();
            String feedUrl = (String) getModel("feedUrl").getValue();
            String siteUrl = (String) getModel("siteUrl").getValue();

            if (ValidationUtils.isEmpty(name)) {
                validationResult.addError("The name field can not be blank.");
            } else if (!ValidationUtils.hasBoundedLength(name, 5, 14)) {
                validationResult.addError("The name field must be between 5 and 14 characters.");
            }

            if (!"ClientJava.com".equals(name)) {
                validationResult.addWarning("This form prefers the feed ClientJava.com");
            }


            if (ValidationUtils.isEmpty(feedUrl)) {
                validationResult.addError("The feed field can not be blank.");
            }

            if (ValidationUtils.isEmpty(siteUrl)) {
                validationResult.addError("The site field can not be blank.");
            }

            return validationResult;
        }

        private void initEventHandling() {
            PropertyChangeListener handler = new ValidationUpdateHandler();
            addBeanPropertyChangeListener(handler);
            getBeanChannel().addValueChangeListener(handler);
        }


        // Event Handling *********************************************************
        class ValidationUpdateHandler implements PropertyChangeListener {
            public void propertyChange(PropertyChangeEvent evt) {
                updateValidationResult();
            }

            private void updateValidationResult() {
                ValidationResult result = validate();
                getValidationModel().setResult(result);
            }


        }
    }

    public static void main(String[] a){
      JFrame f = new JFrame("Validation on Key Typed Example");
      f.setDefaultCloseOperation(2);
      f.add(new ValidatingOnKeyTypedExample());
      f.pack();
      f.setVisible(true);
    }
}

           
       

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