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.ui.input.CmsGroupSelection; import org.opencms.gwt.client.util.CmsDomUtil; 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.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.<br> * If there is no value in the content xml, the value<br> * set in the configuration string of the xsd is shown.<p> * * */ public class CmsGroupWidget extends Composite implements I_CmsEditWidget { /** Configuration parameter to set the flags of the groups to display, optional. */ public static final String CONFIGURATION_FLAGS = "flags"; /** Configuration parameter to set the organizational unit of the groups to display, optional. */ public static final String CONFIGURATION_OUFQN = "oufqn"; /** Configuration parameter to set the user of the groups to display, optional. */ public static final String CONFIGURATION_USER = "user"; /** Value of the activation. */ private boolean m_active = true; /** The the flags used in the popup window. */ private Integer m_flags; /** The disabled textbox to show the value. */ private CmsGroupSelection m_groupSelection; /** The the organizational unit used in the popup window. */ private String m_ouFqn; /** The the user used in the popup window. */ private String m_userName; /** * Creates a new display widget.<p> * * @param config The configuration string given from OpenCms XSD. */ public CmsGroupWidget(String config) { parseConfiguration(config); m_groupSelection = new CmsGroupSelection(null); m_groupSelection.setParameter(m_flags, m_ouFqn, m_userName); m_groupSelection.getTextAreaContainer() .addStyleName(I_CmsWidgetsLayoutBundle.INSTANCE.widgetCss().vfsInputBox()); m_groupSelection.addValueChangeHandler(new ValueChangeHandler<String>() { public void onValueChange(ValueChangeEvent<String> event) { fireChangeEvent(); } }); initWidget(m_groupSelection); m_groupSelection.getTextAreaContainer().getTextBox().addFocusHandler(new FocusHandler() { public void onFocus(FocusEvent event) { CmsDomUtil.fireFocusEvent(CmsGroupWidget.this); } }); } /** * @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 org.opencms.acacia.client.widgets.I_CmsEditWidget#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() { ValueChangeEvent.fire(this, m_groupSelection.getText()); } /** * @see com.google.gwt.user.client.ui.HasValue#getValue() */ public String getValue() { return m_groupSelection.getText(); } /** * @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) { // TODO implement this in case we want the delete behavior for optional fields return false; } /** * @see org.opencms.acacia.client.widgets.I_CmsEditWidget#setActive(boolean) */ public void setActive(boolean active) { // check if the value has changed. If there is no change do nothing. if (m_active == active) { return; } m_groupSelection.setEnabled(active); if (!active) { m_groupSelection.setFormValueAsString(""); } m_active = active; if (active) { fireChangeEvent(); } } /** * Sets the color for the input box.<p> * * @param color the color that should be set * */ public void setColor(String color) { m_groupSelection.getElement().getStyle().setColor(color); } /** * @see org.opencms.acacia.client.widgets.I_CmsEditWidget#setName(java.lang.String) */ public void setName(String name) { // no input field so nothing to do } /** * @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) { // add the saved value to the display field if (value.equals("")) { // m_textbox.setFormValueAsString(m_default); } else { m_groupSelection.setFormValueAsString(value); } if (fireEvents) { fireChangeEvent(); } } /** * Parse the configuration.<p> * * @param config the configuration * */ private void parseConfiguration(String config) { m_userName = null; m_flags = null; if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(config)) { int flagsIndex = config.indexOf(CONFIGURATION_FLAGS); if (flagsIndex != -1) { // user is given String flags = config.substring(CONFIGURATION_FLAGS.length() + 1); if (flags.indexOf('|') != -1) { // cut eventual following configuration values flags = flags.substring(0, flags.indexOf('|')); } try { m_flags = Integer.valueOf(flags); } catch (Throwable t) { // invalid flags } } int groupIndex = config.indexOf(CONFIGURATION_USER); if (groupIndex != -1) { // user is given String user = config.substring(groupIndex + CONFIGURATION_USER.length() + 1); if (user.indexOf('|') != -1) { // cut eventual following configuration values user = user.substring(0, user.indexOf('|')); } m_userName = user; } int oufqnIndex = config.indexOf(CONFIGURATION_OUFQN); if (oufqnIndex != -1) { // user is given String oufqn = config.substring(oufqnIndex + CONFIGURATION_OUFQN.length() + 1); if (oufqn.indexOf('|') != -1) { // cut eventual following configuration values oufqn = oufqn.substring(0, oufqn.indexOf('|')); } m_ouFqn = oufqn; } } } }