Java tutorial
/* * This library is part of OpenCms - * the Open Source Content Management System * * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com) * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * For further information about Alkacon Software, please see the * company website: http://www.alkacon.com * * For further information about OpenCms, please see the * project website: http://www.opencms.org * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package org.opencms.acacia.client.widgets; import org.opencms.acacia.client.css.I_CmsWidgetsLayoutBundle; import org.opencms.gwt.client.I_CmsHasResizeOnShow; import org.opencms.gwt.client.ui.input.CmsTextArea; import org.opencms.util.CmsStringUtil; import com.google.gwt.dom.client.Element; import com.google.gwt.event.dom.client.FocusEvent; import com.google.gwt.event.dom.client.FocusHandler; import com.google.gwt.event.logical.shared.HasResizeHandlers; import com.google.gwt.event.logical.shared.ResizeEvent; import com.google.gwt.event.logical.shared.ResizeHandler; import com.google.gwt.event.logical.shared.ValueChangeEvent; import com.google.gwt.event.logical.shared.ValueChangeHandler; import com.google.gwt.event.shared.HandlerRegistration; import com.google.gwt.user.client.ui.Composite; /** * Provides a display only widget, for use on a widget dialog.<p> * * */ public class CmsTextareaWidget extends Composite implements I_CmsEditWidget, HasResizeHandlers, I_CmsHasResizeOnShow { /** Default number of rows to display. */ private static final int DEFAULT_ROWS_NUMBER = 5; /** The token to control activation. */ private boolean m_active = true; /** The input test area.*/ private CmsTextArea m_textarea = new CmsTextArea(); /** * Creates a new display widget.<p> * * @param config the widget configuration string */ public CmsTextareaWidget(String config) { // All composites must call initWidget() in their constructors. initWidget(m_textarea); int configheight = DEFAULT_ROWS_NUMBER; if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(config)) { try { int rows = Integer.parseInt(config); if (rows > 0) { configheight = rows; } } catch (Exception e) { // nothing to do } } m_textarea.setRows(configheight); m_textarea.getTextArea().addStyleName(I_CmsWidgetsLayoutBundle.INSTANCE.widgetCss().textAreaBox()); m_textarea.getTextAreaContainer() .addStyleName(I_CmsWidgetsLayoutBundle.INSTANCE.widgetCss().textAreaBoxPanel()); m_textarea.addValueChangeHandler(new ValueChangeHandler<String>() { public void onValueChange(ValueChangeEvent<String> event) { fireChangeEvent(); } }); m_textarea.addResizeHandler(new ResizeHandler() { public void onResize(ResizeEvent event) { fireResizeEvent(event); } }); } /** * @see com.google.gwt.event.dom.client.HasFocusHandlers#addFocusHandler(com.google.gwt.event.dom.client.FocusHandler) */ public HandlerRegistration addFocusHandler(FocusHandler handler) { return addDomHandler(handler, FocusEvent.getType()); } /** * @see com.google.gwt.event.logical.shared.HasResizeHandlers#addResizeHandler(com.google.gwt.event.logical.shared.ResizeHandler) */ public HandlerRegistration addResizeHandler(ResizeHandler handler) { return addHandler(handler, ResizeEvent.getType()); } /** * @see com.google.gwt.event.logical.shared.HasValueChangeHandlers#addValueChangeHandler(com.google.gwt.event.logical.shared.ValueChangeHandler) */ public HandlerRegistration addValueChangeHandler(ValueChangeHandler<String> handler) { return addHandler(handler, ValueChangeEvent.getType()); } /** * Represents a value change event.<p> * */ public void fireChangeEvent() { String result = ""; if (m_textarea.getFormValueAsString() != null) { result = m_textarea.getFormValueAsString(); } ValueChangeEvent.fire(this, result); } /** * Represents a resize event.<p> * @param event from text area panel */ public void fireResizeEvent(ResizeEvent event) { ResizeEvent.fire(this, event.getWidth(), event.getHeight()); } /** * @see com.google.gwt.user.client.ui.HasValue#getValue() */ public String getValue() { return m_textarea.getFormValueAsString(); } /** * @see org.opencms.acacia.client.widgets.I_CmsEditWidget#isActive() */ public boolean isActive() { return m_active; } /** * @see org.opencms.acacia.client.widgets.I_CmsEditWidget#onAttachWidget() */ public void onAttachWidget() { super.onAttach(); } /** * @see org.opencms.acacia.client.widgets.I_CmsEditWidget#owns(com.google.gwt.dom.client.Element) */ public boolean owns(Element element) { return getElement().isOrHasChild(element); } /** * @see org.opencms.gwt.client.I_CmsHasResizeOnShow#resizeOnShow() */ public void resizeOnShow() { m_textarea.resizeOnShow(); } /** * @see org.opencms.acacia.client.widgets.I_CmsEditWidget#setActive(boolean) */ public void setActive(boolean active) { if (m_active == active) { return; } m_active = active; m_textarea.setEnabled(m_active); if (m_active) { getElement() .removeClassName(org.opencms.acacia.client.css.I_CmsLayoutBundle.INSTANCE.form().inActive()); getElement().focus(); } else { getElement().addClassName(org.opencms.acacia.client.css.I_CmsLayoutBundle.INSTANCE.form().inActive()); } if (!active) { m_textarea.setFormValueAsString(""); } if (active) { fireChangeEvent(); } } /** * @see org.opencms.acacia.client.widgets.I_CmsEditWidget#setName(java.lang.String) */ public void setName(String name) { m_textarea.setName(name); } /** * @see com.google.gwt.user.client.ui.HasValue#setValue(java.lang.Object) */ public void setValue(String value) { setValue(value, false); } /** * @see com.google.gwt.user.client.ui.HasValue#setValue(java.lang.Object, boolean) */ public void setValue(String value, boolean fireEvents) { // set the saved value to the textArea m_textarea.setFormValueAsString(value); if (fireEvents) { fireChangeEvent(); } } }