StringDialogField.java example

Explorer
pdt-master
/*******************************************************************************
 * Copyright (c) 2009 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
 *     Zend Technologies
 *******************************************************************************/
package org.eclipse.php.internal.ui.wizards.fields;

import org.eclipse.jface.contentassist.SubjectControlContentAssistant;
import org.eclipse.jface.text.DefaultInformationControl;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.jface.text.contentassist.IContentAssistant;
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.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.contentassist.ContentAssistHandler;
import org.eclipse.wst.sse.ui.internal.derived.HTMLTextPresenter;

/**
 * Dialog field containing a label and a text control.
 */
public class StringDialogField extends DialogField {

	protected String fText;
	protected Text fTextControl;
	protected ModifyListener fModifyListener;
	protected IContentAssistProcessor fContentAssistProcessor;

	public StringDialogField() {
		super();
		fText = ""; //$NON-NLS-1$
	}

	public void setContentAssistProcessor(IContentAssistProcessor processor) {
		fContentAssistProcessor = processor;
		if (fContentAssistProcessor != null && isOkToUse(fTextControl)) {
			ContentAssistHandler.createHandlerForText(fTextControl, createPHPContentAssistant(fContentAssistProcessor));
		}
	}

	public static SubjectControlContentAssistant createPHPContentAssistant(IContentAssistProcessor processor) {
		final SubjectControlContentAssistant contentAssistant = new SubjectControlContentAssistant();

		contentAssistant.setContentAssistProcessor(processor, IDocument.DEFAULT_CONTENT_TYPE);

		contentAssistant.setContextInformationPopupOrientation(IContentAssistant.CONTEXT_INFO_ABOVE);
		contentAssistant.setInformationControlCreator(
				parent -> new DefaultInformationControl(parent, SWT.NONE, new HTMLTextPresenter(true)));

		return contentAssistant;
	}

	public IContentAssistProcessor getContentAssistProcessor() {
		return fContentAssistProcessor;
	}

	// ------- layout helpers

	/*
	 * @see DialogField#doFillIntoGrid
	 */
	@Override
	public Control[] doFillIntoGrid(Composite parent, int nColumns) {
		assertEnoughColumns(nColumns);

		Label label = getLabelControl(parent);
		label.setLayoutData(gridDataForLabel(1));
		Text text = getTextControl(parent);
		text.setLayoutData(gridDataForText(nColumns - 1));

		return new Control[] { label, text };
	}

	/*
	 * @see DialogField#getNumberOfControls
	 */
	@Override
	public int getNumberOfControls() {
		return 2;
	}

	protected static GridData gridDataForText(int span) {
		GridData gd = new GridData();
		gd.horizontalAlignment = GridData.FILL;
		gd.grabExcessHorizontalSpace = true;
		gd.horizontalSpan = span;
		return gd;
	}

	// ------- focus methods

	/*
	 * @see DialogField#setFocus
	 */
	@Override
	public boolean setFocus() {
		if (isOkToUse(fTextControl)) {
			fTextControl.setFocus();
			fTextControl.setSelection(0, fTextControl.getText().length());
		}
		return true;
	}

	// ------- ui creation

	/**
	 * Creates or returns the created text control.
	 * 
	 * @param parent
	 *            The parent composite or <code>null</code> when the widget has
	 *            already been created.
	 */
	public Text getTextControl(Composite parent) {
		if (fTextControl == null) {
			assertCompositeNotNull(parent);
			fModifyListener = e -> doModifyText(e);

			fTextControl = new Text(parent, SWT.SINGLE | SWT.BORDER);
			// moved up due to 1GEUNW2
			fTextControl.setText(fText);
			fTextControl.setFont(parent.getFont());
			fTextControl.addModifyListener(fModifyListener);

			fTextControl.setEnabled(isEnabled());
			if (fContentAssistProcessor != null) {
				ContentAssistHandler.createHandlerForText(fTextControl,
						createPHPContentAssistant(fContentAssistProcessor));
			}
		}
		return fTextControl;
	}

	protected void doModifyText(ModifyEvent e) {
		if (isOkToUse(fTextControl)) {
			fText = fTextControl.getText();
		}
		dialogFieldChanged();
	}

	// ------ enable / disable management

	/*
	 * @see DialogField#updateEnableState
	 */
	@Override
	protected void updateEnableState() {
		super.updateEnableState();
		if (isOkToUse(fTextControl)) {
			fTextControl.setEnabled(isEnabled());
		}
	}

	// ------ text access

	/**
	 * Gets the text. Can not be <code>null</code>
	 */
	public String getText() {
		return fText;
	}

	/**
	 * Sets the text. Triggers a dialog-changed event.
	 */
	public void setText(String text) {
		fText = text;
		if (isOkToUse(fTextControl)) {
			fTextControl.setText(text);
		} else {
			dialogFieldChanged();
		}
	}

	/**
	 * Sets the text without triggering a dialog-changed event.
	 */
	public void setTextWithoutUpdate(String text) {
		fText = text;
		if (isOkToUse(fTextControl)) {
			fTextControl.removeModifyListener(fModifyListener);
			fTextControl.setText(text);
			fTextControl.addModifyListener(fModifyListener);
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.jdt.internal.ui.wizards.dialogfields.DialogField#refresh()
	 */
	@Override
	public void refresh() {
		super.refresh();
		if (isOkToUse(fTextControl)) {
			setTextWithoutUpdate(fText);
		}
	}

}