[news.eclipse.platform.swt] Problem in using virtual table

["Stephen" <shi-feng.yu@xxxxxxxxxx>]

Hi,

I wrote a customized tableviewer based on virtual table, but I meet some 
problems:
In my table viewer,after user inserts new row, all the existing rows become 
blank except the row which is inserted. By debugging, I found that when a 
new row is inserted to the table, ,my code will do
1)refresh the viewer
2)set the background color for those rows which are read-only

Ok, problems come. When my code call xxxViewer.refresh(), it will call 
[private void internalVirtualRefreshAll()] (I implemented this method just 
like the org.eclipse.jface.viewers.TableViewer has done, so you can find 
this method in the org.eclipse.jface.viewers.TableViewer)
this method will call getTable().clearAll(); this method will clean each 
table item if it is cashed.
Ok, after refresh, all items in table are cleaned with attribute cached = 
false.

After the refresh operation, my code sets the background color for those 
rows which are read-only, but I found that once [public void setBackground 
(Color color) ]in TableItem is called, the attribue:cached is set to true 
regardless of whether the data (I mean other attributes like: 
strings,checked and etc) is really loaded.

Therefore, after refresh and set background color operations, the table 
items in my table have following states:
cached =true;
background=xxx;
strings=null;
image=null;
.......

Seeing from the state above, cached is true but strings is null,this state 
causes the blank displaying.

For now, I don't how to fix this problem. I try to judget whether the table 
item is cached before I set the color, but the there is no API to access the 
"cashed" attribute of table item.

Does anybody meet similar problem? Or you have solution for me?


Thanks a lot.