Datagrid: multiple hilites

[David Bovill]

Whoa!

So sorry. I really checked this very thoroughly or so I thought. I turns out
not to a datagrid issue, but mine - or should that be a Rev bug??? Goes like
this:

I was relying on a handler I've had for decades
"rect_CreateTransparentButton" which does what is say on the tin, creates a
semi-transparent button at the rect you specify, so you can see the area -
one click an it is gone. OK - but :)

set the rect of transparentButton to someRect
> show transparentButton
>

that's it! That's the problem ??? The script creates the button with "create
invisible button someName", does some stuff, sets the rect and shows the
button - so? Well setting the rect of an invisible object off screen does
not work?!? It gets limited to the screen rect.

OK - it's old code and it would be better to set the templatebutton and then
reset it - but still I can feel good about myself and waisting Trevors time
right? This is surely a Rev bug :)

2009/10/20 Trevor DeVore <lists at mangomultimedia.com>

> On Oct 17, 2009, at 7:02 PM, David Bovill wrote:
>
>  I checked again Trevor. It makes sense that it does not work in cases
>> where
>> the controls are not cached - where it is broken is when the controls are
>> cached but you try to get:
>>
>> the dgRectOfIndex [1] of dataGrid
>>
>> and the controls are scrolled heavily, so that the invisible row view
>> would
>> be above the top of the card. In these cases it does not return the
>> correct
>> geometry as the invisible row view is limited to the top of the screen and
>> no its "true" negative y values. These means that if you try to scroll to
>> the first row it does not work.
>>
>
> I just performed the following test and the dgRectOfIndex[1] returned the
> proper result.
>
> 1) Created new Data Grid.
> 2) Changed style to "form"
> 3) Turned off fixed row height
> 4) Turned on "cache controls"
> 5) Turned off "persistent data"
> 6) Positioned Data Grid at 0,0
>
> I then added about 50 or so lines to the Data Grid. Here are results:
>
> put the dgRectOfIndex[1] of group 1
> 0,0,233,21
>
> I then scrolled to the bottom of the Data Grid:
>
> put the dgRectOfIndex[1] of group 1
> 0,-451,233,-430
>
> I then tried scrolling the first index back into view and it worked:
>
> dispatch "ScrollRectIntoView" to group 1 with the dgRectOfIndex[1] of group
> 1
>
> Just let me know what steps you are taking and what you are seeing. If
> there is a bug that is the only way I can track it down.
>
>
> --
> Trevor DeVore
> Blue Mango Learning Systems
> ScreenSteps: http://www.screensteps.com
> Releasable Revolution Resources for Developers:
> http://revolution.bluemangolearning.com
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