/**
    * Copyright 2005-2011 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.opensource.org/licenses/ecl2.php
    *
   * 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.rice.krad.uif.layout;
  
  import org.kuali.rice.krad.uif.container.Container;
  import org.kuali.rice.krad.uif.container.Group;
  import org.kuali.rice.krad.uif.view.View;
  
  /**
   * Layout manager that organizes its components in a table based grid
   * 
   * <p>
   * Items are laid out from left to right (with each item taking up one column)
   * until the configured number of columns is reached. If the item count is
   * greater than the number of columns, a new row will be created to render the
   * remaining items (and so on until all items are placed). Labels for the fields
   * can be pulled out (default) and rendered as a separate column. The manager
   * also supports the column span and row span options for the field items. If
   * not specified the default is 1.
   * </p>
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class GridLayoutManager extends LayoutManagerBase {
      private static final long serialVersionUID = 1890011900375071128L;
  
      private int numberOfColumns;
  
      private boolean suppressLineWrapping;
      private boolean applyAlternatingRowStyles;
      private boolean applyDefaultCellWidths;
      private boolean renderAlternatingHeaderColumns;
      private String firstLineStyle = "";
  
      public GridLayoutManager() {
          super();
      }
  
      /**
       * The following finalization is performed:
       * 
       * <ul>
       * <li>If suppressLineWrapping is true, sets the number of columns to the
       * container's items list size</li>
       * </ul>
       * 
       * @see org.kuali.rice.krad.uif.layout.LayoutManagerBase#performFinalize(org.kuali.rice.krad.uif.view.View,
       *      java.lang.Object, org.kuali.rice.krad.uif.container.Container)
       */
      @Override
      public void performFinalize(View view, Object model, Container container) {
          super.performFinalize(view, model, container);
  
          if (suppressLineWrapping) {
              numberOfColumns = container.getItems().size();
          }
      }
  
      /**
       * @see org.kuali.rice.krad.uif.layout.ContainerAware#getSupportedContainer()
       */
      @Override
      public Class<? extends Container> getSupportedContainer() {
          return Group.class;
      }
  
      /**
       * Indicates the number of columns that should make up one row of data
       * 
       * <p>
       * If the item count is greater than the number of columns, a new row will
       * be created to render the remaining items (and so on until all items are
       * placed).
       * </p>
       * 
       * <p>
       * Note this does not include any generated columns by the layout manager,
       * so the final column count could be greater (if label fields are
       * separate).
       * </p>
       * 
       * @return
       */
      public int getNumberOfColumns() {
          return this.numberOfColumns;
      }
 
     /**
      * Setter for the number of columns (each row)
      * 
      * @param numberOfColumns
      */
     public void setNumberOfColumns(int numberOfColumns) {
         this.numberOfColumns = numberOfColumns;
     }
 
     /**
      * Indicates whether the number of columns for the table data should match
      * the number of fields given in the container's items list (so that each
      * field takes up one column without wrapping), this overrides the configured
      * numberOfColumns 
      * 
      * <p>
      * If set to true during the initialize phase the number of columns will be
      * set to the size of the container's field list, if false the configured
      * number of columns is used
      * </p>
      * 
      * @return boolean true if the column count should match the container's
      *         field count, false to use the configured number of columns
      */
     public boolean isSuppressLineWrapping() {
         return this.suppressLineWrapping;
     }
 
     /**
      * Setter for the suppressLineWrapping indicator
      * 
      * @param suppressLineWrapping
      */
     public void setSuppressLineWrapping(boolean suppressLineWrapping) {
         this.suppressLineWrapping = suppressLineWrapping;
     }
 
     /**
      * Indicates whether alternating row styles should be applied
      * 
      * <p>
      * Indicator to layout manager templates to apply alternating row styles.
      * See the configured template for the actual style classes used
      * </p>
      * 
      * @return boolean true if alternating styles should be applied, false if
      *         all rows should have the same style
      */
     public boolean isApplyAlternatingRowStyles() {
         return this.applyAlternatingRowStyles;
     }
 
     /**
      * Setter for the alternating row styles indicator
      * 
      * @param applyAlternatingRowStyles
      */
     public void setApplyAlternatingRowStyles(boolean applyAlternatingRowStyles) {
         this.applyAlternatingRowStyles = applyAlternatingRowStyles;
     }
 
     /**
      * Indicates whether the manager should default the cell widths
      * 
      * <p>
      * If true, the manager will set the cell width by equally dividing by the
      * number of columns
      * </p>
      * 
      * @return boolean true if default cell widths should be applied, false if
      *         no defaults should be applied
      */
     public boolean isApplyDefaultCellWidths() {
         return this.applyDefaultCellWidths;
     }
 
     /**
      * Setter for the default cell width indicator
      * 
      * @param applyDefaultCellWidths
      */
     public void setApplyDefaultCellWidths(boolean applyDefaultCellWidths) {
         this.applyDefaultCellWidths = applyDefaultCellWidths;
     }
 
     /**
      * Indicates whether header columns (th for tables) should be rendered for
      * every other item (alternating)
      * 
      * <p>
      * If true the first cell of each row will be rendered as an header, with
      * every other cell in the row as a header
      * </p>
      * 
      * @return boolean true if alternating headers should be rendered, false if
      *         not
      */
     public boolean isRenderAlternatingHeaderColumns() {
         return this.renderAlternatingHeaderColumns;
     }
 
     /**
      * Setter for the render alternating header columns indicator
      * 
      * @param renderAlternatingHeaderColumns
      */
     public void setRenderAlternatingHeaderColumns(boolean renderAlternatingHeaderColumns) {
         this.renderAlternatingHeaderColumns = renderAlternatingHeaderColumns;
     }
 
 
     public String getFirstLineStyle() {
         return firstLineStyle;
     }
 
     /**
      * Style class given to the first line in the collection
      * @param firstLineStyle
      */
     public void setFirstLineStyle(String firstLineStyle) {
         this.firstLineStyle = firstLineStyle;
     }
 }