/**

  * Copyright 2010 The Kuali Foundation Licensed under the

  * Educational Community License, Version 2.0 (the "License"); you may

  * not use this file except in compliance with the License. You may

  * obtain a copy of the License at

  *

  * http://www.osedu.org/licenses/ECL-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an "AS IS"

  * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express

  * or implied. See the License for the specific language governing

  * permissions and limitations under the License.

  */

 package org.kuali.student.common.ui.client.widgets.rules;

 import org.kuali.student.common.ui.client.widgets.KSLabel;

 import org.kuali.student.common.ui.client.widgets.table.Node;

 import com.google.gwt.event.dom.client.ClickHandler;

 import com.google.gwt.event.shared.HandlerRegistration;

 import com.google.gwt.user.client.ui.CheckBox;

 import com.google.gwt.user.client.ui.FocusPanel;

 import com.google.gwt.user.client.ui.HTML;

 import com.google.gwt.user.client.ui.HorizontalPanel;

 import com.google.gwt.user.client.ui.VerticalPanel;

 public class RuleNodeWidget extends FocusPanel {

     //widgets

     private Node node;

     private HTML html = new HTML();

     private HorizontalPanel checkBoxAndEdit;

     private CheckBox checkBox = new CheckBox();

     private KSLabel edit = new KSLabel("Edit");

     private KSLabel toggle = new KSLabel("");

     //data

     private HandlerRegistration editClauseHandlerRegistration;

     private ClickHandler editClickHandler;

     private boolean editMode = false;

     private boolean showCheckbox;

     public RuleNodeWidget(Node n) {

         init(n, true);

     }

     public RuleNodeWidget(Node n, boolean showControls) {

         init(n, showControls);

     }

     private void init(Node n, boolean showControls) {

         node = n;

         this.showCheckbox = showControls;

         drawNode(n, null, -1, -1); 

     }

     public void drawNode(Node n, RuleTable ruleTable, int rowIndex, int columnIndex) {

         node = n;

         if (!(node.getUserObject() instanceof Token)) {

             super.setWidget(html);

             html.setHTML(node.getUserObject().toString());

             checkBox.setHTML(node.getUserObject().toString());

             return;

         }

         Token userObject = (Token) node.getUserObject();

         String selectionStyle = (userObject.isCheckBoxOn() ? "KS-ReqComp-Selected" : "KS-ReqComp-DeSelected");

         //true if the node is AND/OR operator

         if (userObject.isTokenOperator()) {

             VerticalPanel checkBoxAndToggle = new VerticalPanel();

             super.setWidget(checkBoxAndToggle);

             this.addStyleName(userObject.isCheckBoxOn() ? "KS-Rules-Table-Cell-Selected" : "KS-Rules-Table-Cell-DeSelected");            

             if (showCheckbox) {

                 checkBoxAndToggle.add(checkBox); 

             }

             toggle.setText(userObject.getType() == Token.Or ? Token.createOrToken().value.toUpperCase() : Token.createAndToken().value.toUpperCase());

             toggle.addStyleName("KS-Rules-Table-Cell-ANDOR");

             checkBoxAndToggle.add(toggle);

             if (ruleTable != null) {

                 ruleTable.getCellFormatter().setStyleName(rowIndex, columnIndex, selectionStyle);

                 ruleTable.getCellFormatter().addStyleName(rowIndex, columnIndex, "KS-Toggle");

             }

         } else { //we have a rule to display in this node 

             checkBoxAndEdit = new HorizontalPanel();

             HorizontalPanel tableCell = new HorizontalPanel();

             super.setWidget(tableCell);

             this.setStyleName(userObject.isCheckBoxOn() ? "KS-Rules-Table-Cell-Selected" : "KS-Rules-Table-Cell-DeSelected");

             if (userObject.getTokenID() != null) {

                 KSLabel rcLabel = new KSLabel(userObject.getTokenID());

                 rcLabel.setStyleName("KS-Rules-Table-Cell-ID");

                 tableCell.add(rcLabel);

             }            

             tableCell.add(checkBoxAndEdit);

             if (showCheckbox) {

                 checkBoxAndEdit.add(checkBox);

                 checkBox.setHTML(node.getUserObject().toString());

             } else {

                 checkBoxAndEdit.add(new KSLabel(node.getUserObject().toString()));

             }

             edit.addStyleName("KS-Rules-URL-Link");

             checkBoxAndEdit.add(edit);

             if (ruleTable != null) {

                 checkBoxAndEdit.setStyleName(selectionStyle);

             }

             html.addStyleName("KS-ReqComp-Panel");

         }

         checkBox.setValue(userObject.isCheckBoxOn());

         html.setHTML(node.getUserObject().toString());

     }

     public boolean isSelected(){

         return checkBox.getValue();

     }

     public boolean isShowCheckbox() {

         return showCheckbox;

     }

     public void setShowCheckbox(boolean showCheckbox) {

         this.showCheckbox = showCheckbox;

     }

     public Node getNode() {

         return node;

     }

     public void addEditClauseHandler(ClickHandler ch) {

         editClickHandler = ch;

         editClauseHandlerRegistration = edit.addClickHandler(ch);

     }

     public void clearEditClauseHandler() {

         if (editClauseHandlerRegistration != null) {

             editClauseHandlerRegistration.removeHandler();

             editClauseHandlerRegistration = null;

         }

     }  

     public void setEnabled(boolean enabled) {

         checkBox.setEnabled(enabled);

         if (enabled) {

             edit.removeStyleName("KS-Rules-URL-Link-Readonly");

             edit.addStyleName("KS-Rules-URL-Link");

             addEditClauseHandler(editClickHandler);

         } else {

             edit.removeStyleName("KS-Rules-URL-Link");

             edit.addStyleName("KS-Rules-URL-Link-Readonly");            

             clearEditClauseHandler();

         }

     }

     public boolean isEditMode() {

         return editMode;

     }

     public void setEditMode(boolean editMode) {

         this.editMode = editMode;

     }

 }