Java tutorial
/* * The Kuali Financial System, a comprehensive financial management system for higher education. * * Copyright 2005-2014 The Kuali Foundation * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.kuali.kfs.sys.document.web.renderers; import java.io.IOException; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.PageContext; import javax.servlet.jsp.tagext.Tag; import org.apache.commons.lang.StringUtils; import org.apache.struts.taglib.html.HiddenTag; import org.kuali.kfs.sys.context.SpringContext; import org.kuali.kfs.sys.document.web.HideShowBlock; import org.kuali.rice.core.api.config.property.ConfigurationService; import org.kuali.rice.kns.web.taglib.html.KNSImageTag; /** * Renders a hide show block */ public class HideShowBlockRenderer implements Renderer { private HideShowBlock hideShowBlock; private HiddenTag tabStateTag = new HiddenTag(); private KNSImageTag showHideButton = new KNSImageTag(); protected String riceImageURLProperty = "kr.externalizable.images.url"; /** * * @see org.kuali.kfs.sys.document.web.renderers.Renderer#clear() */ public void clear() { hideShowBlock = null; cleanTabStateTag(); cleanShowHideButton(); } /** * Cleans the tab state hidden tag */ protected void cleanTabStateTag() { tabStateTag.setPageContext(null); tabStateTag.setParent(null); tabStateTag.setProperty(null); tabStateTag.setValue(null); } /** * Cleans the show/hide button up */ protected void cleanShowHideButton() { showHideButton.setPageContext(null); showHideButton.setParent(null); showHideButton.setSrc(null); showHideButton.setAlt(null); showHideButton.setTitle(null); showHideButton.setProperty(null); showHideButton.setStyleClass(null); showHideButton.setStyleId(null); showHideButton.setOnclick(null); } /** * Renders the title row and forces the rendering of child content * @see org.kuali.kfs.sys.document.web.renderers.Renderer#render(javax.servlet.jsp.PageContext, javax.servlet.jsp.tagext.Tag) */ public void render(PageContext pageContext, Tag parentTag) throws JspException { JspWriter out = pageContext.getOut(); try { out.write(buildLabelButtonTableOpening()); renderTabStateTag(pageContext, parentTag); if (!StringUtils.isBlank(hideShowBlock.getLabel())) { out.write(hideShowBlock.getLabel()); } renderShowHideButton(pageContext, parentTag); out.write(buildLabelButtonTableClosing()); out.write(buildInnerTableOpening()); hideShowBlock.renderChildRows(pageContext, parentTag); out.write(buildInnerTableClosing()); } catch (IOException ioe) { throw new JspException("Difficulty rendering Hide/Show block", ioe); } } /** * @return the HTML for the opening of the button table */ protected String buildLabelButtonTableOpening() { return "<table class=\"datatable\" style=\"padding: 0px\"><tr><td class=\"tab-subhead\">"; } /** * Renders a hidden tag which holds the current tab state * @param pageContext the pageContext to render to * @param parentTag the tag requesting all this rendering * @throws JspException thrown if something goes wrong */ protected void renderTabStateTag(PageContext pageContext, Tag parentTag) throws JspException { tabStateTag.setPageContext(pageContext); tabStateTag.setParent(parentTag); tabStateTag.setProperty("tabStates(" + hideShowBlock.getTabKey() + ")"); tabStateTag.setValue(hideShowBlock.getTabState()); tabStateTag.doStartTag(); tabStateTag.doEndTag(); } /** * @return the HTML for the closing of the label button table */ protected String buildLabelButtonTableClosing() { return "</td></tr></table>"; } /** * Renders the hide/show image button * @param pageContext the pageContext to render to * @param parentTag the tag requesting all this rendering * @throws JspException thrown if something goes wrong */ protected void renderShowHideButton(PageContext pageContext, Tag parentTag) throws JspException { showHideButton.setPageContext(pageContext); showHideButton.setParent(parentTag); showHideButton.setProperty("methodToCall.toggleTab.tab" + hideShowBlock.getTabKey()); showHideButton.setStyleClass("tinybutton"); showHideButton.setStyleId("tab-" + hideShowBlock.getTabKey() + "-imageToggle"); showHideButton.setOnclick("javascript: return toggleTab(document, '" + hideShowBlock.getTabKey() + "'); "); String riceImageDir = SpringContext.getBean(ConfigurationService.class) .getPropertyValueAsString(riceImageURLProperty); if (hideShowBlock.isShowing()) { showHideButton.setSrc(riceImageDir + "tinybutton-hide.gif"); showHideButton.setAlt("Hide " + hideShowBlock.getFullLabel()); showHideButton.setTitle("Hide " + hideShowBlock.getFullLabel()); } else { showHideButton.setSrc(riceImageDir + "tinybutton-show.gif"); showHideButton.setAlt("Show " + hideShowBlock.getFullLabel()); showHideButton.setTitle("Show " + hideShowBlock.getFullLabel()); } showHideButton.doStartTag(); showHideButton.doEndTag(); } /** * Creates the HTML for the hiding/showing div and inner table to display children in * @return the HTML for the opening of the inner table */ protected String buildInnerTableOpening() { StringBuilder opening = new StringBuilder(); opening.append("<div id=\"tab-" + hideShowBlock.getTabKey() + "-div\" style=\"display: "); opening.append(hideShowBlock.isShowing() ? "block" : "none"); opening.append("\">"); opening.append("<table class=\"datatable\" style=\"width: 100%;\">"); return opening.toString(); } /** * Creates the HTML to close the inner table and hide/show div * @return the HTML for the closing of the inner table */ protected String buildInnerTableClosing() { return "</table></div>"; } /** * Gets the hideShowBlock attribute. * @return Returns the hideShowBlock. */ public HideShowBlock getHideShowBlock() { return hideShowBlock; } /** * Sets the hideShowBlock attribute value. * @param hideShowBlock The hideShowBlock to set. */ public void setHideShowBlock(HideShowBlock hideShowBlock) { this.hideShowBlock = hideShowBlock; } }