Help with Level editor?

[camelman]

So I finally decided to attempt making a level editor (for a platform game) but I'm having some troubles. I've read almost every level editor/tile based game article on the daily click, and w/e else I could find, but most of them are just breif summaries on the fundamentals of a level editor, or only focus on a small part of level editors. :\

Anyways, atm I just need help with the tile selector. For this I am using the "Active Picture Object" so any user can easily double click and import a tileset from a folder. I also made a 16x16 cursor that follows the mouse in a grid fashion to select your tile.

Heres the tricky part.

For easy customization, and for the sake of organization, I want to make the Tile Selector, and the Map itself different sub-applications, inside a main-application. I need this for the Tile Selector atleast, because most of the tile-sets I'll be using are pretty huge, and I figured to keep them from taking up the whole screen I would just make a Tile Select sub-app, in a small window, and allow the user a scrollbar to see the rest of the tileset. It's working exactly how I wanted it to...but

Heres my problem:

The only way I know how to "rip" a single 16x16 tile from any image is by using the Active Picture Object's "Create backdrop" action, and naming parameters. Thing is, I need to be able to select a tile in the tile selector sub-app, and then bring it over to the Map sub-app to place it. In order to do this though, I'm gonna need a.."middleman" for lack of a better term to get the data of the selected tile, and the tile itself, and then bring that over to the Map sub-app. Atleast that's what I'm thinking needs to be done.

OR

If the above isn't even possible, I suppose I could do without the sub-apps.. But I would still need a way to have the Tile selector in its own smaller window with a scrollbar, so when I import a tile-set it doesn't take up the whole screen.

I'm completely stumped atm so :\ any help is greatly appreciated!

[Zabooza]

have you tried the level saved extension?

[LB]

You should use global values to transfer the data of what's selected from the sub-apps to the main window and such. Then you can easily have your connection, or, "middleman".

[uprize]

Also if you load the tileset into another Active Picture Object I am pretty sure you can clip the parts of the image outside the bounding box.