Live data Listbox sorting

asked 2007-05-15 02:18:58 +0800

admin
18691 ● 1 ● 10 ● 130

Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=4312721

By: sdswamy

Following the Developers Guide, I have implemented the following. The question I have is what should I write inside the sort() method in the ProductListModel class that implements ListModelExt??
------------------------------------------------------------------
StringListComparator.java
------------------------------------------------------------------

public class StringListComparator implements java.util.Comparator{

private boolean ascending;
private int _idx;

public StringListComparator(boolean asc, int idx){
ascending = asc;
_idx = idx;
}

public int compare(Object o1, Object o2) {
String s1 = ((Listcell)((Listitem) o1).getChildren().get(_idx)).getLabel();
String s2 = ((Listcell)((Listitem) o1).getChildren().get(_idx)).getLabel();

int v = s1.trim().toUpperCase().compareTo(s2.trim().toUpperCase());
return ascending ? v: -v;
}
}

--------------------------------------------------------------
This is the zul file
-------------------------------------------------------------
<window id="ProductWindow" border="normal">
<zscript>
import com.xxx.yyy.util.comparators.StringListComparator;

StringListComparator name_asc = new StringListComparator(true, 1);
StringListComparator name_dsc = new StringListComparator(false, 1);
StringListComparator number_asc = new StringListComparator(true, 2);
StringListComparator number_dsc = new StringListComparator(false, 2);
</zscript>

<listbox use="com.xxx.yyy.webapp.ProductList" id="ProductListFacadeDelegate"
rows="10" onSelect="showEditWindow()">
<listhead>
<listheader label="Name" maxlength="45" width="150px" sortAscending="${name_asc}"
sortDescending="${name_dsc}" />
<listheader label="Number" width="100px" sortAscending="${number_asc}"
sortDescending="${number_dsc}" />
</listhead>
</listbox>
</window>
-------------------------------------------------------------
ProductList.java
-------------------------------------------------------------
public class ProductList extends Listbox implements AfterCompose{

private List products;


public void afterCompose(){
ListModel model = new ProductListModel(this.getProducts());
//System.out.println("Model size is: " + model.getSize());
ListitemRenderer itemRenderer = new ProductListItemRenderer();
this.setModel(model);
this.setItemRenderer(itemRenderer);
}
}
--------------------------------------------------------------
ProductListModel.java
--------------------------------------------------------------
public class ProductListModel extends ListModelList implements ListModelExt{

private List products;
public ProductListModel(List _products){
products = _products;
}

public void sort(Comparator cmpr, boolean ascending) {

//HOW TO DO THE REAL SORTING??
//WHAT SHOULD I DO HERE?? I WANT TO USE THE SAME COMPARATOR CLASS FOR MANY COLUMNS
//List list = Arrays.asList(products);
// Collections.sort(list, new StringListComparator())
new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, -1, -1);
}
}