edu.iastate.cs.boa.ui.dialogs.InputSelectionDialog.java Source code

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Here is the source code for edu.iastate.cs.boa.ui.dialogs.InputSelectionDialog.java

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// modified from: http://dev.eclipse.org/svnroot/tools/org.eclipse.buckminster/trunk/org.eclipse.buckminster.ui/src/java/org/eclipse/buckminster/ui/ComboInputDialog.java
// @author rdyer
/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Cloudsmith Inc. - creation of new class ComboInputDialog from original org.eclipse.jface.dialogs.InputDialog
 *******************************************************************************/
package edu.iastate.cs.boa.ui.dialogs;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.IInputValidator;
import org.eclipse.jface.resource.StringConverter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class InputSelectionDialog extends Dialog {
    private final String title;
    private final String message;

    private String value;
    private final IInputValidator validator;

    private final String[] choices;
    private Combo combo;

    private Text errorMessageText;
    private String errorMessage;

    public InputSelectionDialog(final Shell parent, final String title, final String message,
            final String[] choices, final String value, final IInputValidator validator) {
        super(parent);

        this.title = title;
        this.message = message;
        this.choices = choices;
        if (value == null)
            this.value = "";
        else
            this.value = value;
        this.validator = validator;
    }

    public String getValue() {
        return value;
    }

    public void setErrorMessage(final String errorMessage) {
        this.errorMessage = errorMessage;

        if (errorMessageText != null && !errorMessageText.isDisposed()) {
            errorMessageText.setText(errorMessage == null ? " \n " : errorMessage);

            final boolean hasError = errorMessage != null
                    && (StringConverter.removeWhiteSpaces(errorMessage)).length() > 0;
            errorMessageText.setEnabled(hasError);
            errorMessageText.setVisible(hasError);
            errorMessageText.getParent().update();

            final Control button = getButton(IDialogConstants.OK_ID);
            if (button != null)
                button.setEnabled(errorMessage == null);
        }
    }

    @Override
    protected void buttonPressed(final int buttonId) {
        if (buttonId == IDialogConstants.OK_ID)
            value = combo.getText();
        else
            value = null;
        super.buttonPressed(buttonId);
    }

    @Override
    protected void configureShell(final Shell shell) {
        super.configureShell(shell);
        if (title != null)
            shell.setText(title);
    }

    @Override
    protected void createButtonsForButtonBar(final Composite parent) {
        createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
        createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);

        combo.setFocus();
        if (value != null)
            combo.setText(value);
    }

    @Override
    protected Control createDialogArea(final Composite parent) {
        final Composite composite = (Composite) super.createDialogArea(parent);

        if (message != null) {
            final Label label = new Label(composite, SWT.WRAP);
            label.setText(message);
            final GridData data = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL
                    | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER);
            data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
            label.setLayoutData(data);
            label.setFont(parent.getFont());
        }

        combo = new Combo(composite, SWT.NONE);
        combo.setItems(choices);
        combo.setVisibleItemCount(choices.length);
        combo.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL));
        combo.addModifyListener(new ModifyListener() {
            public void modifyText(ModifyEvent e) {
                validateInput();
            }
        });

        errorMessageText = new Text(composite, SWT.READ_ONLY | SWT.WRAP);
        errorMessageText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL));
        errorMessageText.setBackground(errorMessageText.getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
        setErrorMessage(errorMessage);

        applyDialogFont(composite);

        return composite;
    }

    protected void validateInput() {
        setErrorMessage(validator != null ? validator.isValid(combo.getText()) : null);
    }
}