1 == Halcyon and Potlatch 2.0 - ActionScript 3 renderer and editor ==
3 Potlatch 2.0 is the new version of the OpenStreetMap online editor.
5 Halcyon is its rendering engine. It's rules-based (like, say, Mapnik) and does dotted lines, text on a path, casing, icons for POIs, all of that.
7 Both are written in ActionScript 3. Potlatch 2.0 additionally uses the Flex framework.
9 Many icons used in halcyon/potlatch2 are based on the awesome CC0-licensed SJJB icons project. http://www.sjjb.co.uk/mapicons/
11 === What you'll need ===
13 * Flex SDK 3.4 or 3.5 - http://www.adobe.com/products/flex/ (free, OS X/Windows/Linux)
14 * AS3 docs - http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/
15 * Flash debug player - http://www.adobe.com/support/flashplayer/downloads.html
16 * Basically you might as well just sell your soul to Adobe
19 ***Do not use FlexSDK <= 3.3 or > 4***. There are compatibility errors with version 4, and 3.3
20 and earlier have this bug: http://bugs.adobe.com/jira/browse/SDK-16705 which is a major issue for the
23 You'll only need OSM Rails port installed on your local machine if you are doing hard-core
24 server-communication coding, but if generally you can use the dev server at api06.dev.openstreetmap.org
25 for development and testing.
28 === How to compile and run ===
32 Before you start, copy the properties template file, and edit the FLEX_HOME variable
33 cp build.properties.template build.properties
35 The following command will compile potlatch2 in debug configuration
36 The result is put at resources/potlatch2.swf
40 The following command will compile potlatch2 in release configuration
44 Compiling Halcyon as standalone viewer:
46 * mxmlc halcyon_viewer.as
49 Compiling during development:
51 Compiling optimized versions from scratch takes a _long_ time. There are
52 several ways to make it faster during development and also add useful
53 debug stack traces and enable the commandline debugger (at the expense
54 of a much larger swf file.. but we're developing so that doesn't matter!).
57 - launches the Flex Compiler SHell -- stops the compiler having to
58 bootstrap itself each time you invoke it. You don't /need/ this, but it
59 does make things slightly faster (about a second a shot for me)
61 * mxmlc -load-config+=debug-config.xml potlatch2.mxml
62 - compile potlatch2 in debug configuration -- build is incremental so you
63 can run it again and mxmlc will only compile changes. Output has debug
64 enabled along with decent stack traces.
65 (you can substitute halcyon_viewer.as in the above to compile that)
68 - when using fcsh recompile the first command
71 - type it again to compile again. You'll really wish that up-arrow,enter
72 worked, but Adobe is laughing at you RIGHT NOW.
75 - if you have it on your system (e.g. linux), rlwrap is a godsend. Launch
76 fcsh with 'rlwrap path/to/fcsh' and up arrows will work, even persistantly
77 across one fcsh session to the next.
81 * Flash security model sucks. If you want to use internet resource (e.g. map calls to the dev
82 server) the binary must have been served from "teh internets". Run resources/server.rb to launch a local
83 server, then go to http://localhost:3333/potlatch2.html to get started (or if you're already running e.g.
84 Apache locally, feel free to use that instead.
86 * If you are doing offline development, you will need a rails_port install. You
87 will need to add an OAuth application by going to
88 http://rails-port.local/user/<username>/oauth_clients/new
89 Enter the following details (assuming the above point):
90 * Name (Required): Potlatch2 (local)
91 * Main Application URL (Required): http://localhost:3333/resources/potlatch2.html
92 And then update resources/potlatch2.html replacing the domains.
94 === Some other stuff you might need to know ===
96 * Flex compiler runs at about the speed of a tortoise soaked in molasses which happens also to be dead.
97 * Running the debug player helps when coding, since it'll pop up the runtime errors. You don't see them
98 with the normal player.