Trackbar and SetGadgetState

[dmoc]

srod, I will try your method even though it looks so brutal. FYI: I may be wrong but I thought there would be individual events for "scroll" and "changed". In this specific case I either manually/programatically change the trkbar position and want to capture a "changed" event which is then used to update a text control with the trkbars value. Once done I don't/won't need to consider the text control again, just the trkbar, from where ever I decide to update it from.

Yes I could splatter code around to achieve this or even wrap the SetGadgetState() in a SetTrackBar() proc but in more general cases this becomes messy I suspect it's not needed. Any win gui gods want to comment?

[dmoc]

srod wins a gold star! Thanks. I will look into the 312.

[srod]

It was some kind of changed event that I was looking for. In a way, I wouldn't be surprised if this does not exist in this case, because of, well because of the comments we've all made here.

Certainly the windows message with code 312 seems to fire specifically for the trackbar (in this case) and fires at the desired time. Indeed it seems to fire whenever the control requires some kind of updating; painting etc.

Maybe someone can shed some info on this message.

[netmaestro]

312 = #WM_CTLCOLORSTATIC

[srod]

Aha, about the only damn one I didn't try! That explains why it fires when it does.

Strange though, how on earth does a trackbar control fit into the static controls? It's classname is mcstls_trackbar32!

[dmoc]

I noticed this one but it don't make sense for the trkbar.

[srod]

It could be a coincidence in that there may well be another window constant, specific to trackbars, with the same value.

At least lParam allows you to differentiate between the controls though.

[Sub-Routine]

I have a trackbar that is used as an indicator, ie, changed using SetGadgetState(). What EventType/#WM_???? tells me it has changed? I want to update a text control when the bars value changes, possibly from several places so I want to capture an event.

That all seems so complicated to me. If you are using SetGadgetState() why not also use SetGadgetText() next?

Another situation is where a trackbar is used for both input and output (at different times).

You should probably create two trackbars (at the same location) and just Hidegadget() the one you are not using.

All IMHO
Rand

[dmoc]

@Sub-Routine: thanks for suggestions but solved (see above). I mentioned in a previous post why a do not want to update the text gadget as you suggest. I'm also trying to keep parity with an equivalent c# version (at the moment and as far as practical).