Tip# 6: Checkbox in Grid' column header

1. Problem: 
2. I wanted to show checkboxes as row selection in SmartGWT so i found this solution from Showcase

  ListGrid recipientGrid = new ListGrid();

2. recipientGrid.setWidth(350);  
3. recipientGrid.setHeight(250);
4. recipientGrid.setShowAllRecords(true);
5. recipientGrid.setSelectionType(SelectionStyle.SIMPLE);  
6. recipientGrid.setSelectionAppearance(SelectionAppearance.CHECKBOX);
7. 
   
8. I used DataSource to fill the ListGrid but the checkbox in Grid's column 
   header was not allowing to check the checkbox and was showing an 
   warning message in tooltip.
   
   
   

   

   
   
   
   
   the warning message is:
   

   
   

   "Can't select that many records Please try working in smaller batches"

even I fill datasource with less than 10 records it did not work.

Solution:

     Replace the datasource with ListGridRecord[] data. Now it can work for both small and larges batches.