Hi,
I think there is an example of that on my website,In a demo to do database.
There is an SVG area over a list box and when the most moves I get the
coordinates, calculate the scrollbar positions and find the cell. I then find
the data associated with the hovered cell, clear whatever elements are
displayed in the SVG area, then read draw whatever is necessary in the SVG.
Sent from my iPhone
> On 15 Aug 2018, at 01:50, John J Foster via 4D_Tech <4d_tech@lists.4d.com>
> wrote:
>
> Hi Cannon,
>
> Yep, that’s what I was thinking. Just need a bit of scaffolding. Just needs
> to be handle indirectly and not in the cell.
>
> And what then what Keith said should make it able to manipulate the DOM and
> then do whatever you need.
>
> I thought the idea was doable.
>
> Cool!
>
> John…
>
>> It is actually _almost_ doable. With some math it is possible to figure out
>> where the cursor is over a particular picture cell and "SVG Find element ID
>> by coordinates” works in this context. For example:
>>
>> $tID:=SVG Find element ID by coordinates(agRM_Graph{1};$x;$y)
>>
>> returns the ID the mouse is over.
>>
>> The part that does not work is the command SVG SET ATTRIBUTE. For example:
>>
>> SVG SET
>> ATTRIBUTE(agRM_Graph{1};"Value1";"fill-opacity";"1";"stroke-opacity";"1”)
>>
>> does not work. This kills an idea I was _really_ hoping would work. Sigh.
>>
>> I find it interesting that SVG Find element ID by coordinates works and SVG
>> SET ATTRIBUTE doesn’t work in this context. It seems logical to me that
>> either they would both work or neither would work in this context.
>
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