Create Grid Columns in Java ONLY

asked 2013-04-12 20:03:25 +0800

ansancle
327 ● 9

I create grids dynamically everywhere, I create the columns,rows, etc.. all on the fly in Java. However, the grid itself is always defined in the .zul file which allows me to specify that it has columns :

<dhUserGrid id="_userGrid"  width="300px">
    <columns>           
    <column/>
   </columns>
</dhUserGrid>

I now want to create the grid 100% in java and then just set it's parent also in the java :

So the zul would have no entry except for the parent :

 <groupbox id="_gridParent"/>

The java would have :

DHeUserGrid _userGrid = new DHeUserGrid();
_userGrid.setParent(gridParent);

When I do this, my code that creates the columns for the grid throws an exception since the Columns are null when the grid.getColumns() is called. There is no method to set the columns, how can I do this without having to specify the grid in the zul file with columns???

private void buildColumns()
{
    // !!!! getColumns RETURNS NULL !!!!!
    _grid.getColumns().getChildren().clear();
    int i = 0;
    if (_bShowLabels == true)
    {
        Column newColumn = new Column();
        newColumn.setAlign("center");   
        newColumn.setWidth(_labelColumnWidth);
        _grid.getColumns().appendChild(newColumn);  
        i++;
    }
    while (i <=_maxColumns)
    {
        Column newColumn = new Column();
        newColumn.setAlign("center");   
        if (i != 0)
            newColumn.setWidth(_buttonColumnWidth);
        else
            newColumn.setWidth(_buttonColumnWidth);
        _grid.getColumns().appendChild(newColumn);          
        i++;
    }   
}