mirror of
https://github.com/janet-lang/janet
synced 2024-11-04 15:56:17 +00:00
72 lines
1.9 KiB
Plaintext
72 lines
1.9 KiB
Plaintext
# :lazy true needed for jpm quickbin
|
|
# lazily loads library on first function use
|
|
# so the `main` function
|
|
# can be marshalled.
|
|
(ffi/context "/usr/lib/libgtk-3.so" :lazy true)
|
|
|
|
(ffi/defbind
|
|
gtk-application-new :ptr
|
|
"Add docstrings as needed."
|
|
[title :string flags :uint])
|
|
|
|
(ffi/defbind
|
|
g-signal-connect-data :ulong
|
|
[a :ptr b :ptr c :ptr d :ptr e :ptr f :int])
|
|
|
|
(ffi/defbind
|
|
g-application-run :int
|
|
[app :ptr argc :int argv :ptr])
|
|
|
|
(ffi/defbind
|
|
gtk-application-window-new :ptr
|
|
[a :ptr])
|
|
|
|
(ffi/defbind
|
|
gtk-button-new-with-label :ptr
|
|
[a :ptr])
|
|
|
|
(ffi/defbind
|
|
gtk-container-add :void
|
|
[a :ptr b :ptr])
|
|
|
|
(ffi/defbind
|
|
gtk-widget-show-all :void
|
|
[a :ptr])
|
|
|
|
(ffi/defbind
|
|
gtk-button-set-label :void
|
|
[a :ptr b :ptr])
|
|
|
|
(def cb (delay (ffi/trampoline :default)))
|
|
|
|
(defn ffi/array
|
|
``Convert a janet array to a buffer that can be passed to FFI functions.
|
|
For example, to create an array of type `char *` (array of c strings), one
|
|
could use `(ffi/array ["hello" "world"] :ptr)`. One needs to be careful that
|
|
array elements are not garbage collected though - the GC can't follow references
|
|
inside an arbitrary byte buffer.``
|
|
[arr ctype &opt buf]
|
|
(default buf @"")
|
|
(each el arr
|
|
(ffi/write ctype el buf))
|
|
buf)
|
|
|
|
(defn on-active
|
|
[app]
|
|
(def window (gtk-application-window-new app))
|
|
(def btn (gtk-button-new-with-label "Click Me!"))
|
|
(g-signal-connect-data btn "clicked" (cb)
|
|
(fn [btn] (gtk-button-set-label btn "Hello World"))
|
|
nil 1)
|
|
(gtk-container-add window btn)
|
|
(gtk-widget-show-all window))
|
|
|
|
(defn main
|
|
[&]
|
|
(def app (gtk-application-new "org.janet-lang.example.HelloApp" 0))
|
|
(g-signal-connect-data app "activate" (cb) on-active nil 1)
|
|
# manually build an array with ffi/write
|
|
# - we are responsible for preventing gc when the arg array is used
|
|
(def argv (ffi/array (dyn *args*) :string))
|
|
(g-application-run app (length (dyn *args*)) argv))
|