EDIT

/**

 *

 */

package eu.etaxonomy.taxeditor.ui.element;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.KeyAdapter;

import org.eclipse.swt.events.KeyEvent;

import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.events.ModifyListener;

import org.eclipse.swt.graphics.Color;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Listener;

import org.eclipse.swt.widgets.Text;

import org.eclipse.ui.forms.widgets.TableWrapData;

import eu.etaxonomy.cdm.common.CdmUtils;

import eu.etaxonomy.taxeditor.preference.Resources;

/**

 * @author n.hoffmann

 * @version $Id: $

 */

public class TextWithLabelElement extends AbstractCdmFormElement implements ModifyListener, IEnableableFormElement,

        ISelectable {

    protected Text text;

    private Label label;

    private final boolean isMultiLine;

    public static final int MAX_HEIGHT = 0;

    public static final int SINGLE = -1;

    protected TextWithLabelElement(CdmFormFactory formFactory, ICdmFormElement parentElement, boolean isMultiLine) {

        super(formFactory, parentElement);

        this.isMultiLine = isMultiLine;

    }

    protected TextWithLabelElement(CdmFormFactory formFactory, ICdmFormElement parentElement, String labelString,

            String initialText, Integer textHeight, int style) {

        this(formFactory, parentElement, labelString, initialText, textHeight, null, false, style);

    }

    protected TextWithLabelElement(CdmFormFactory formFactory, ICdmFormElement parentElement, String labelString,

            String initialText, Integer textHeight, boolean isMultiLine, int style) {

        this(formFactory, parentElement, labelString, initialText, textHeight, null, isMultiLine, style);

    }

    protected TextWithLabelElement(CdmFormFactory formFactory, ICdmFormElement parentElement, String labelString,

            String initialText, Integer textHeight, Integer textLimit, int style) {

        this(formFactory, parentElement, labelString, initialText, textHeight, textLimit, false, style);

    }

    protected TextWithLabelElement(CdmFormFactory formFactory, ICdmFormElement parentElement, String labelString,

            String initialText, Integer textHeight, Integer textLimit, boolean isMultiLine, int style) {

        super(formFactory, parentElement);

        this.isMultiLine = isMultiLine;

        initLabel(formFactory, labelString, isMultiLine, getLayoutComposite());

        initText(formFactory, initialText, textHeight, textLimit, isMultiLine, style, getLayoutComposite());

    }

    protected void initText(CdmFormFactory formFactory, String initialText, Integer textHeight, Integer textLimit,

            boolean isMultiLine, int style, Composite layoutComposite) {

        int scrollStyle = textHeight == null ? SWT.NULL : (SWT.V_SCROLL | SWT.MULTI);

        int combinedStyle = style | SWT.BORDER | scrollStyle;

        // SWT.PASSWORD does not work when SWT.WRAP is set.

        if (style != SWT.PASSWORD) {

            combinedStyle = combinedStyle | SWT.WRAP;

        }

        text = formFactory.createText(layoutComposite, "", combinedStyle);

        text.setTextLimit(textLimit!=null?textLimit:Text.LIMIT);

        addControl(text);

        // text.setWO

        if (textHeight == null) {

            text.addKeyListener(new KeyAdapter() {

                @Override

                public void keyPressed(KeyEvent e) {

                    if (e.character == SWT.CR) {

                        // Don't accept carriage returns as input when in single

                        // line mode

                        e.doit = false;

                    } else if (e.character == SWT.TAB) {

                        // traverse is not working for wrapped text widgets so

                        // we reintroduce it here

                        e.doit = false;

                        TextWithLabelElement.this.text.traverse(SWT.TRAVERSE_TAB_NEXT);

                    }

                }

            });

        }

        TableWrapData layoutData;

        if(isMultiLine){

            layoutData = LayoutConstants.FILL_HORIZONTALLY(2, 1);

        }

        else{

            layoutData = LayoutConstants.FILL();

        }

        if (textHeight != null && textHeight > 0) {

            (layoutData).heightHint = textHeight;

        }

        text.setLayoutData(layoutData);

        text.addModifyListener(this);

        setText(initialText);

    }

    protected void initLabel(CdmFormFactory formFactory, String labelString, boolean isMultiLine, Composite layoutComposite) {

        if (labelString != null) {

            label = formFactory.createLabel(layoutComposite, CdmUtils.Nz(labelString), SWT.NULL);

            addControl(label);

            if(isMultiLine){

                label.setLayoutData(LayoutConstants.FILL_HORIZONTALLY(2, 1));

                ((TableWrapData)label.getLayoutData()).valign = TableWrapData.MIDDLE;

            }

            else{

                label.setLayoutData(LayoutConstants.LEFT());

                ((TableWrapData)label.getLayoutData()).valign = TableWrapData.MIDDLE;

            }

        }

    }

    /**

     * Get the text of this composites text composite

     *

     * @return a {@link java.lang.String} object.

     */

    public String getText() {

      return CdmUtils.Nb(text.getText());

    }

    /**

     * Set the text of this composites text composite

     *

     * @param string

     *            a {@link java.lang.String} object.

     */

    public void setText(String string) {

        Listener[] listeners = text.getListeners(SWT.Modify);

        for (Listener listener : listeners) {

            text.removeListener(SWT.Modify, listener);

        }

        text.setText(CdmUtils.Nz(string));

        for (Listener listener : listeners) {

            text.addListener(SWT.Modify, listener);

        }

    }

    /** {@inheritDoc} */

    @Override

    public void modifyText(ModifyEvent e) {

        if(e.widget==text && !isMultiLine){

            Text text = (Text) e.widget;

            boolean hasControlCharacters = false;

            String textString = text.getText();

            int stringLength = textString.length();

            for (int i = 0; i < stringLength; i++) {

                if (Character.isISOControl(textString.charAt(i))) {

                    hasControlCharacters = true;

                    break;

                }

            }

            if(hasControlCharacters){

                //remove control character such as line breaks etc.

                setText(text.getText().replaceAll("\\p{C}", new Character((char)9608).toString()));

            }

        }

        firePropertyChangeEvent(new CdmPropertyChangeEvent(this, e));

    }

    /** {@inheritDoc} */

    @Override

    public void setEnabled(boolean enabled) {

        text.setEnabled(enabled);

        String symbolicName = enabled ? Resources.COLOR_FONT_DEFAULT : Resources.COLOR_TEXT_DISABLED;

        text.setForeground(getColor(symbolicName));

    }

    @Override

    public boolean isEnabled() {

        return text.isEnabled();

    }

    /** {@inheritDoc} */

    @Override

    public void setIrrelevant(boolean irrelevant) {

        String colorId = irrelevant ? Resources.COLOR_COMPOSITE_IRRELEVANT : Resources.COLOR_COMPOSITE_BACKGROUND;

        Color color = getColor(colorId);

        text.setBackground(color);

    }

    /** {@inheritDoc} */

    @Override

    public void setBackground(Color color) {

        if (label != null) {

            label.setBackground(color);

        }

    }

    @Override

    public void setSelected(boolean selected) {

        setBackground(selected ? SELECTED : getPersistentBackground());

    }

    /** {@inheritDoc} */

    @Override

    public void setFocus() {

        text.setFocus();

    }

    public Control getMainControl() {

        return text;

    }

    public void setTextLimit(int limit) {

        text.setTextLimit(limit);

    }

}