Smooth transition between stacks

[William Prothero]

Folks:

I got it to remove the calling stack and have a clean transition. However, for a splash stack configuration with all of the stacks that do the main app functions, should I even try to delete the splash stack? Is it needed to run the application?

Best,
Bill



> On Mar 20, 2018, at 3:39 PM, William Prothero via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> Folks:
> This seems like it should be very easy, but I’m struggling.
> 
> I want, simply, to transition between stacks in a visually nice and clean way. I’m testing this out in the IDE, in livecode version 9.0.0 (Rc1) and I’m on Mac OS 10.13.3. I think I have a reasonable transition, but I want to close and remove the splash stack from memory. I can’t get it to do this. However, now I’m thinking that the splash stack will contain all of the code, and shouldn’t be purged. The project will have stacks for individual functions in the “Resources” folder. 
> 
> How should I transition from one stack to another, and get the calling stack to leave memory when it’s launched the destination stack? My code won’t do it.
> 
> The splash stack has code like:
> 
> on mouseUp
> 
> put the short name of this stack into splashStackName
> 
> put splashStackName into appParams["splashStackName"]
> 
> put the filename of this stack into fName
> 
> set the itemdelimiter to "/"
> 
> delete the last item of fName
> 
> put "AppSetup-D3.livecode" into appSetupStackFileName
> 
> put "AppSetup-D3" into appSetupStackName
> 
> put appSetupStackName into appParams["appSetupStackName"]
> 
> put fName&"/"&appSetupStackFileName into stTarget
> 
> wait for 0 seconds with messages
> 
> go invisible to stack stTarget
> 
> send "doStackSetup "&splashStackName to stack appSetupStackName
> 
> end mouseUp
> 
> 
> ——The destination stack has this handler to initialize it.
> on doStackSetup originStackName
> 
> put appParams["appSetupStackName"] into thisStack
> 
> set the rect of stack thisStack to the rect of stack originStackName
> 
> wait for 0 seconds with messages
> 
> show stack thisStack
> 
> send "doCloseThisStack "&stackName to me in 1 second
> 
> set the lockscreen to false
> 
> end doStackSetup
> 
> 
> on doCloseThisStack
> 
> breakpoint
> 
> put "Start Earth Explorer" into stackName
> 
> set the destroyStack of stack stackName to true
> 
> close stack stackName
> 
> end doCloseThisStack
> 
> 
> 
> In the destination stack named appSetupStackName, I run code that accesses a database for configuration parameters. I don’t want the user to be required to click a button to initiate this process. I start it on an opencard handler.
> 
> I’ve fiddled with this way more time than I should have to. Does anyone have a nicely visual way of seamlessly going to another stack without screen flashing, windows jumping around, etc. I want the destination stack to just open in the same rect as the source stack.
> 
> I know that the opencard handler runs before the above mouseup code finishes. 
> 
> Thanks for any advice.
> Bill
> 
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