GetInput.java Source code

Introduction

Here is the source code for GetInput.java

Source

import org.eclipse.jface.dialogs.InputDialog;
import org.eclipse.jface.dialogs.IInputValidator;
import org.eclipse.jface.window.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

/**
 * This class demonstrates JFace's InputDialog class
 */
public class GetInput extends ApplicationWindow {
    /**
     * GetInput constructor
     */
    public GetInput() {
        super(null);
    }

    /**
     * Runs the application
     */
    public void run() {
        // Don't return from open() until window closes
        setBlockOnOpen(true);

        // Open the main window
        open();

        // Dispose the display
        Display.getCurrent().dispose();
    }

    /**
     * Configures the shell
     * 
     * @param shell the shell
     */
    protected void configureShell(Shell shell) {
        super.configureShell(shell);

        // Set the title bar text
        shell.setText("Get Input");
    }

    /**
     * Creates the main window's contents
     * 
     * @param parent the main window
     * @return Control
     */
    protected Control createContents(Composite parent) {
        Composite composite = new Composite(parent, SWT.NONE);
        composite.setLayout(new GridLayout(1, false));

        // Create a label to display what the user typed in
        final Label label = new Label(composite, SWT.NONE);
        label.setText("This will display the user input from InputDialog");

        // Create the button to launch the error dialog
        Button show = new Button(composite, SWT.PUSH);
        show.setText("Get Input");
        show.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent event) {
                InputDialog dlg = new InputDialog(Display.getCurrent().getActiveShell(), "", "Enter 5-8 characters",
                        label.getText(), new LengthValidator());
                if (dlg.open() == Window.OK) {
                    // User clicked OK; update the label with the input
                    label.setText(dlg.getValue());
                }
            }
        });

        parent.pack();
        return composite;
    }

    /**
     * The application entry point
     * 
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        new GetInput().run();
    }
}

/**
 * This class validates a String. It makes sure that the String is between 5 and 8
 * characters
 */
class LengthValidator implements IInputValidator {
    /**
     * Validates the String. Returns null for no error, or an error message
     * 
     * @param newText the String to validate
     * @return String
     */
    public String isValid(String newText) {
        int len = newText.length();

        // Determine if input is too short or too long
        if (len < 5)
            return "Too short";
        if (len > 8)
            return "Too long";

        // Input must be OK
        return null;
    }
}