how to change the properties of data grid scrollbar

[keram]

Hi,

I'd like to change the width and color of the data grid scrollbar. There are no settings for this in the dg properties in the Inspector.
How to do it?

keram

[Klaus]

Hi keram,

you can't, since the scrollbars are supplied by the underlying OS.


Best

Klaus

[dave.kilroy]

Assuming you only have one data grid in your stack I find this works:

Code: Select all

set the width of scrollbar dgScrollbar to 32

[keram]

Thanks Dave and Klaus,

I tried with this - it increased the width, I saved the stack, closed it, opened it again, and the width is back to the standard.
So it seems that what Klaus is saying above is valid.

keram

[dave.kilroy]

Hi Keram - well if it's not saving for you maybe you could include that line of code in your preOpenStack handler?

I respect Klaus tremendously but I don't see how a scrollbar in a datagrid can be a property of the OS and unchangeable - I've successfully increased its width for use on tablets without apparent problems

[keram]

Hi Dave,

Unfortunately it does not work with preOpenStack handler at all.
Are you working on a Mac? I'm on PC, maybe that's what is behind the difference?

Thanks anyway.

keram

[dave.kilroy]

That's strange, maybe in a preOpenStack is too early then and it needs to be called later on in a preOpenCard or even openCard handler - or do you have more than one dg in your stack?

Today I'm developing on a mac but I've used this on Win2000 server (IDE and standalone) and Win8 tablet (standalone) ... apart from calling that line of script in the startUp process I have no idea why it isn't working for you

[dave.kilroy]

Just realised I should make a stack that shows it (if I can) and post it here - which I will do in a bit - or if I can't get it working I'll post anyway and report that...

[dave.kilroy]

Hi Keram - just checked and it works on launch in an openCard handler but not the preOpenStack

[keram]

Thanks Dave,

It works for me as well, on openCard handler. And the colours of the scrollbar can be changed in this way:
1. Select the DG
2. Click on Edit Group
3. Select the scrollbar
4. Select the Colors & Patterns in the Inspector
5. the rest you see in the images below; Border, Top and Bottom do not seem to be changeable - I tried and did not see any colour changes:

In Windows the colours will remain the OS default but on Android they show up.

keram

[dave.kilroy]

Hi Keram

Your question has made me do some digging in these two excellent documents: data grid properties
http://lessons.runrev.com/s/lessons/m/d ... properties and data grid API (custom properties)
http://lessons.runrev.com/s/3527/m/data ... a-grid-api

From the former I found the more usual way to change scrollbar width, as opposed to the way I was doing it - and will be changing - is:

Code: Select all

set the dgProp["scrollbar width"] of grp "dgExample" to 35

You should also check out the “auto” setting on “scrollbar width” as well as the “effective scrollbar width”

The other thing I noticed about trying out datagrid scrollbar code on a mac and windows box is that Klaus is absolutely right! (no surprise there) for OSX - because on a mac while the width provided for the datagrid scrollbar may change, the actual scroller appears to stay constant - on Windows this is not the case and the scroller does change.

I’m afraid I don’t know how to change scrollbar colour the way you want and if I was in your position would be considering making a custom scrollbar, placing it above the standard one (or hide the standard one) and writing some code to get it to send appropriate scroll messages to the datagrid - but with any luck someone else will be able to chime in with better suggestions than this

Good luck!

Dave

[keram]

Hi Dave,

I'll look into the 2 pages you refer to again.
"auto" settings is the default and that is way to narrow to comfortably scroll the dg on my 8 inch tablet, probably even worse on smaller phones.

I'm quite happy with the options for changing colours that I found. Anything more complex and complicated to add to the already complex data grid may make it even more sluggish when scrolling.
Thanks for your suggestions.

keram

[dave.kilroy]

Curiouser and curiouser - just checked again on Windows (win7) and it's showing different widths fine there - hmm I wonder what is making the difference, something in how LC works with the underlying OS I guess

[Klaus]

Hi friends,

guilty of being a TAD Mac-centric!


Best

Klaus

[dave.kilroy]

Hi Klaus - well when I was writing that changing scrollbar width works I was being Windows-centric!

...I like OS X much more than Windows and now do most of my development on it, but am still a relative noob compared to Windows (I still have Windows 'muscle-memory' i.e. I still regularly do ctrl+V instead of Cmd+V)