Nice set up, though I do recommend maybe moving it away from any open doors or windows. Long term exposure to direct sunlight isn't best for frogs, and the constant temperature changes when the door is open or shut is uncomfortable for them too. I also recommend keeping him in a more quiet room in the house, as noise during the day time can upset the frog's sleeping patterns. You don't have to tiptoe around him or anything, but a room that experiences lots of foot traffic, loud tv or video games is not ideal. I'm not presuming you keep in a loud place, just making sure to give you as much information as I can. XD I would also recommend putting a little more decor in the tank, some fake plants to fill in the empty space or a rock for him to sit on would be nice if you can provide that. Also yeah, you're water bowl is quite small I would suggest and upgrade. My White's like to sit chin deep in the water, I have an adult that falls asleep almost fully submerged sometimes. XD Just make sure the water isn't deep enough to go over his nose in case he DOES fall asleep in there or falls in or something, White's aren't good swimmers, but they do enjoy their baths.
Another quick note, that tank looks like an Exo Terra 12"x12"x18", am I correct? If so I would definitely recommend upgrading if you can to at least a 20 gallon tall tank, White's Tree Frogs can get quite large and they will appreciate the extra space. I have my adult in an Exo Terra 18"x18"x24" tank, which is 33 gallons and he seems to appreciate it. ^ ^ Now, I know these tanks can be quite expensive and I'm not saying you have to go all out, but the minimum requirement for a full grown White's is 20 gallons, to keep them happy and healthy through adulthood. If you find a deal on an old fish tank or something that you can renovate or fix up that's fine, just be aware of the height and see if you can get one that is at least 15" tall, if not higher. Maybe if you find a bigger tank for your White's, you can move the leopard frog into the Exo Terra? Just a thought.
If you'd like to take a look at my set up you can go right ahead, I have a bunch of pictures of my frogs and some of their tanks on my profile.
Do you know how big exactly your frog is? If you can, measure in inches from the top of his snout to the end of his butt (we call that SVL or Snout to Vent Length), that could determine how old he is if you wanted to know.
I do recommend grabbing some humidity and temperature gauges so you can make sure he's at the right degree and percentage to keep him happy. The liquid crystal strip thermometers are best, and any brand of hygrometer that runs on a dial is pretty good as well, though they aren't always accurate or work right when you buy them...just a suggestion.
And like I said, no problem, I'm happy to help newcomers with their frogs. I LOVE White's, and want to make sure I answer any questions you have to the best of my ability. ^ ^