OpenEuphoria

EuGrid question

• Posted by Matt Lewis <matthewwalkerlewis at yahoo.com> Jul 21, 2003
• 432 views

I've started using EuGrid, and I want to be able to wipe out an entire grid
(data and display).  I'm displaying tables in a database, and the fields,
size of the tables change, so it's easier to simply delete and restart
whenever I want to display another table.  There doesn't seem to be a good
way to do this.  Here's what I've done:

-- wiping out a grid:
cols = EGW_EnumCols( grid )
for i = 1 to length(cols) do
    void = EGW_DeleteCols( grid, cols[i] )
end for
void = EGW_LoadData( grid, {}, EGW_REPLACE )


The catch is, EGW_LoadData() doesn't like it when you send an empty
sequence, though this seems pretty obvious to me what should happen with
EGW_REPLACE, right?  So, I added this elsif block to EGW_LoadData():

if grid > 0 and rows > 0 then
  -- ... do lot's of stuff

elsif grid > 0 and insert_position = EGW_REPLACE then		
    -- data = {}, so delete the whole thing...
    GridData[grid] = data
    GridFlag[grid] = data
    GridCurrentCell[grid] = {-1,-1}
end if

The only alternative to this seems to be to use EGW_DeleteDataRow(), which
would be severely inefficient.  Of course, now I have a non-standard version
of EuGrid. :(

Is there a better way?

Matt Lewis