An inline shower enclosure with one panel is very common, you can have a glass shower door up to 33" wide and then a panel. Normal size door is 28" wide and standard shower enclosure heights are 72" Tall. So for example if your opening is 45" from wall to wall you could have a 28" door with a 17" wide panel. Here you have also two different way to mont the door. You can mount the doors hinges to the wall (recommended) or if you need the door to swing the other way you can also mount the door hinges to the inline panel. Attaching the door to the panel will be more expensive due to additional cut-outs required to attach the door to the panel, possible additional reinforcements for the panel and the 180° Glass-to-Glass hinges that will be required.