For my new game, I chose Lemur as my GUI and I like it so far.
But I have two questions: How can I freely layout elements without the container resizing them (manually set size and position), because it currently just overrides my manual settings.
And how do I determine the slider value from 0 - 1?
If you just want the slider value then you can just grab it:
slider.getModel().getPercent() : value between 0 and 1 representing the scaled min to max.
slider.getModel().getValue() : value between min and max inclusive.
Regarding the layout question:
If you want no layout at all then just don’t put things in a container. They’re just spatials and you can position them however you want attached to whatever node you want.
It’s almost always better to use a layout and control things with their preferred sizes and/or insets. But the other option is always available.