Since defining the UI in Clojure is pretty tedious process, even with
all nice interop features, I decided to write a small library to do
this more easily and in a declarative way. I was inspired by a series
of blogposts by Stuart Sierra, he wrote a wonderful macro that deals
with GridBagLayout. But often you don't need that complex layout, any
simpler layout will do. So I spent an evening writing this
https://github.com/alexander-yakushev/deflayout .
Currently only BorderLayout and FlowLayout are supported, but layouts
can be added easily. I wanted somebody to look at the code and give
the opinion about what can be done better and what changes can be
made.
Usage of the lib is very easy. Here is an example from my tetris game:
(deflayout
frame (:border)
:WEST gamepanel
:EAST (deflayout
sidepanel (:flow :TRAILING)
nextpanel
(JButton. "Exit")))
In this example we define, that the frame will use BorderLayout and
add two panels - one on the west side, and second one on the east one.
Sidepanel that we add is the macro call itself, with FlowLayout and
two elements added - another panel and a button.
As you see, the macro executes the code differently based on which
layout is used. Thus, when the BorderLayout is used, arguments are
read by pairs where the first argument is position and the second is
the object. Instead, in FlowLayout all objects are just passed
sequentially.
I will surely extend this macro to cover all other layouts, but I need
some of the guidance and recommendations. Also, I would be happy if
Stuart Sierra allowed me to include his GridBagLayout code into the
lib.
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