What really helped me take hold of the reigns of datagrids is the notion of
getting the index (or line) of a data control, getting the array associated
with that line, altering the array, and then setting the array in the datagrid
when I was done.
This process is actually quite simple. Lets say a user clicked on a line in a
table form and you want to process it somehow. Consider the following:
put the dgHilitedIndex of group "myDataGrid" into theIndexNumber -- a
number referencing the row array
if theIndexNumber is empty then -- nothing selected
exit mouseUp
end if
put the dgDataOfIndex[theIndexNumber] of group "myDataGrid" into aMyData --
an array
put aMyData["column1"] into theFirstValue -- a value. column1 is the actual
name of your column.
put aMyData["column2"] into theSecondValue
put aMyData["column3"] into theThirdValue
Now go do some stuff with the data, and when you are done:
put theFirstValue aMyData["column1"] into aMyData["column1"]
put theSecondValue aMyData["column2"] into aMyData["column2"]
put theThirdValue aMyData["column3"] into aMyData["column3"]
set the dgDataOfIndex[theIndexNumber] of group "myDataGrid" to aMyData --
update the row
Sometimes it is easier to work with the data grid data as a chunk of text:
put the dgtext ["false"] of group "myDataGrid" into theGridData -- tab/cr
delimited list
false means the first row does not contain the column names. In this mode it
will simply use the position of the column as the index to the data in the
column. If you use true, then the first line of your text needs to be the
column names. This can be handy when you want to update only certain columns
but leave the others intact. When done processing:
set the dgtext ["false"] of group "myDataGrid" to theGridData -- put the
data back
While the Datagrid tutorial and API is very useful, and I recommend it for the
first time use of data grids, it doesn't actually list everything you can do
with a datagrid. To see all the commands and functions available to the data
grid, issue this command:
edit the script of the behavior of group "myDataGrid".
Simple huh? What would be nice is if I could pass the column names off to
dgText so that I only got the columns I wanted. The beauty is though, that I
can copy the behavior scripts to a new button, set the behavior of the datagrid
to that button, and then make it do things the way I want to.
Bob
On Mar 4, 2011, at 8:34 AM, Keith Clarke wrote:
> Hi Trevor,
> Thanks for confirming that this behaviour is not coming from the GLX
> framework.
> Maybe it's time to bite the bullet and replace my simple ListMagic controls
> with data grids - and learn how to drive them and DGH properly! ;-)
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