It's unclear if this is related to the TMS FMX UI Pack but these pages explain how to setup live preview. Are there any issues with the TMS FMX UI Pack components in combination with Live Preview?
TMS FMX UI is not registered in the shipped FireUI Live Preview. I just need know how to modify the source code of live preview to make TMS FMX Pack work in Live Preview. Something like this blog post about adding TChart in live Preview.
There is currently no support for the FireUI Live Preview, we still need to investigate how we can register all controls. Currently you need to manually register controls you are using at designtime.
We have investigated this here, but it's still unclear how to make sure the component is active and available at designtime without any changes in the Regs.pas file in the LivePreview application. The default LivePreview application also clearly states:
// Register here any component that is not previously registered by the framework
We have already applied RegisterClasses, RegisterFMXClasses in all our components, but still the LivePreview application doesn't show them at designtime. It seems manually editing the Regs.pas file in the LivePreview application is currently the only working solution.
That is what Steema software did as well. I suggest that you post the changes needed to the Regs.pas so users can add the modifications as per their needs.