package org.kuali.student.common.ui.client.widgets.table.scroll;

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

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

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

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

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

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

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

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

 public class TableDemoPanel extends Composite{

         DefaultTableModel tableModel = new DefaultTableModel();

         public TableDemoPanel(){

                 super.initWidget(createDemoPage());

         }

         private Widget createDemoPage(){

                 VerticalPanel p = new VerticalPanel();

                 tableModel.setMultipleSelectable(true);

                 final Table table = createTable();

                 p.add(table);

                 table.getScrollPanel().addScrollHandler(new ScrollHandler(){

             @Override

             public void onScroll(ScrollEvent event) {

                 System.out.println(table.getScrollPanel().getOffsetHeight());

                 System.out.println(table.getScrollPanel().getScrollPosition());

             }

                 });

                 table.getScrollPanel().setHeight("700px");

                 Button appendDataButton = new Button("Append Data");

                 appendDataButton.addClickHandler(new ClickHandler(){

                         @Override

                         public void onClick(ClickEvent event) {

                                 Course c = new Course();

                                 c.setId(1);

                                 c.setName("1aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");

                                 tableModel.addRow(new CourseRow(c));

                                 c = new Course();

                                 c.setId(2);

                                 c.setName("b");

                                 tableModel.addRow(new CourseRow(c));

                                 c = new Course();

                                 c.setId(3);

                                 c.setName("c");

                                 tableModel.addRow(new CourseRow(c));

                                 c = new Course();

                                 c.setId(4);

                                 c.setName("d");

                                 tableModel.addRow(new CourseRow(c));

                                 c = new Course();

                                 c.setId(4);

                                 c.setName("d");

                                 tableModel.addRow(new CourseRow(c));

                                 c = new Course();

                                 c.setId(4);

                                 c.setName("d");

                                 tableModel.addRow(new CourseRow(c));

                                 tableModel.fireTableDataChanged();

                         }

                 });

                 p.add(appendDataButton);

                 return p;

         }

     private Table createTable(){                

             Column col1 = new Column();

             col1.setId("id");

                 col1.setName("ID");

                 col1.setWidth("100px");

                 col1.setAscendingRowComparator(new CourseIdAscendingRowComparator());

                 col1.setDescendingRowComparator(new CourseIdDescendingRowComparator());

                 Column col2 = new Column();

                 col2.setId("name");

                 col2.setName("Name");

                 col2.setWidth("300px");

                 Column col3 = new Column();

                 col3.setId("isFull");

                 col3.setName("Full");

                 col3.setWidth("500px");

                 tableModel.installCheckBoxRowHeaderColumn();

                 tableModel.addColumn(col1);

                 tableModel.addColumn(col2);

                 tableModel.addColumn(col3);

                 Table table = new Table();

                 table.setTableModel(tableModel);

                 return table;

   }

 }

 class CourseIdAscendingRowComparator extends RowComparator{

         @Override

         public int compare(Row row0, Row row1) {

                 Integer id0 = (Integer)row0.getCellData("id");

                 Integer id1 = (Integer)row1.getCellData("id");

                 return id0.compareTo(id1);

         }

 }

 class CourseIdDescendingRowComparator extends RowComparator{

         @Override

         public int compare(Row row0, Row row1) {

                 Integer id0 = (Integer)row0.getCellData("id");

                 Integer id1 = (Integer)row1.getCellData("id");

                 return id1.compareTo(id0);

         }

 }

 class CourseRow extends Row{

         private Course course;

         public CourseRow(Course c){

                 course = c;

         }

         @Override

         public Object getCellData(String columnId) {

                 if ("id".equals(columnId)) {

                         return course.getId();

                 } else if ("name".equals(columnId)) {

                         return course.getName();

                 } else if ("isFull".equals(columnId)) {

                         return course.isFull();

                 }

                 return null;

         }

         @Override

         public void setCellData(String columnId, Object newValue) {

                 if(newValue == null){

                         newValue = "";

                 }

             if ("id".equals(columnId)) {

                         course.setId(Integer.parseInt(newValue.toString()));

                 } else if ("name".equals(columnId)) {

                         course.setName(newValue.toString());

                 } else if ("isFull".equals(columnId)) {

                         course.setFull((Boolean)newValue);

                 }

         }

         @Override

     public String toString(){

                 return course.getId()+"";

         }

 }

 class Course {

         private int id;

         private String name;

         private boolean isFull;

         public boolean isFull() {

                 return isFull;

         }

         public void setFull(boolean isFull) {

                 this.isFull = isFull;

         }

         public int getId() {

                 return id;

         }

         public void setId(int id) {

                 this.id = id;

         }

         public String getName() {

                 return name;

         }

         public void setName(String name) {

                 this.name = name;

         }

         public String toString(){

                 return ""+id;

         }

 }