On Fri, Jan 21, 2011 at 2:25 AM, Bob Sneidar <b...@twft.com> wrote:
> Well I don't want to take a lot of anyone's time anymore. I thought it would
> be a simple matter to get the value of a cell in one dataGrid and put it into
> the cell of another, but this is proving to be a beatch.
>
> In your experiment 19, you use setDataOfLine to modify the value in the color
> column in the row dropped on to. Okay I get it, but since I am trying to put
> the value into the first empty cell in that column I am using setDataOfIndex
> because the cell may not be visible, should be no problem.
>
> But here's the problem: The destination data grid starts out empty, so all my
> calls to the index of anything is going to be zero. Even if I fudge the index
> to be one, if there is no objects for line 1, I cannot set the dataOfAnything.
>
> In retrospect, I think the way a datagrid should have been implemented is,
> there should ALWAYS be objects replicated for as many rows as are visible.
> This way, I could get and set values for any visible line without having to
> worry about this gotcha. I can see though that if someone scrolled the data
> grid, you would be faced with having to add more rows, and then would you
> delete them if the user scrolled up?
>
> Maybe the solution would be to have at least one empty row at the bottom of
> the datagrid so there would be objects to work with. Or else, the data grid
> api could be modified so that if I set the dataOfIndex or dataOfLine larger
> than dgNumberOfLines, it would insert as many blank lines as needed to get me
> there. Food for thought.
>
> I think what I will do, is instead of setting dgText to empty when I want to
> clear the datagrid, I will set the contents to a tab delimited list of empty
> lines for as many rows as are displayed. That will get around this issue for
> now.
>
> I hope people see my issue. It is like having a spreadsheet that constantly
> threw errors when I used an empty cell as a reference, simply because there
> was nothing in it.
Bob,
on dragMove
set the dragaction to "move"
if (the dgDataControl of the target is empty) then
addData ## Add a data line on the fly if the line not existing
end if
end dragMove
on dragDrop
local tTheLine, tTheColumn
if (the dgDataControl of the target is empty) then pass dragDrop
put the dgLine of the dgDataControl of the target into tTheLine
put the dgColumn of the dgDataControl of the target into tTheColumn
put the dragData["private"] into tTheDragData
if (line 1 of tTheDragData is "Datagrid 1") then
SetDataOfLine tTheLine, tTheColumn, line 2 of tTheDragData
send "RefreshList" to me in 0 secs
end if
end dragDrop
Some explanations:
1. In the dragMove, the lines are created on the fly if the
dgDataControl of the target is empty (so there is no line of data
under the mouse) So dropping a value in a cell is allowed with no
error.
2. In dragDrop, a test is added:
if (the dgDataControl of the target is empty) then pass dragDrop
No more error should occur if the datagrid is empty
Best regards,
--
-Zryip TheSlug- wish you the best! 8)
http://www.aslugontheroad.co.cc
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