implemented

README.md

@@ -2,46 +2,61 @@
 
 A small system tray API for Racket.
 
-Version 0.1 implements Windows directly through the Win32 API. It uses the
-native `HWND` of an existing Racket `frame%`/`dialog%`, `Shell_NotifyIconW`, and
-`SetWindowSubclass`. No additional native DLL is required.
+Version 0.1.1 implements Windows directly through the Win32 API. It uses the
+native `HWND` of an existing Racket `frame%` or `dialog%`, `Shell_NotifyIconW`,
+and `SetWindowSubclass`. No additional native DLL is required.
 
 ```racket
 #lang racket/gui
 
 (require racket-tray)
 
-(define frame
-  (new frame%
-       [label "Tray example"]
-       [width 400]
-       [height 250]))
+(define tray-frame%
+  (class frame%
+    (super-new [label "Tray example"]
+               [width 400]
+               [height 250])
+
+    ;; Close [X] to the tray instead of destroying the frame.
+    (define/override (on-close)
+      (send this show #f))))
+
+(define frame (new tray-frame%))
+
+(define (show-frame)
+  (send frame show #t)
+  (when (send frame is-iconized?)
+    (send frame iconize #f)))
 
 (define tray
   (mk-tray frame
            "example.png"
-           (λ ()
-             (send frame show #t))))
+           show-frame
+           #:hide-on-minimize? #t))
 
 (tray-set-menu!
  tray
  (list
-  (list "Open"
-        (λ () (send frame show #t)))
+  (list "Open" show-frame)
   'separator
   (list "Exit"
         (λ ()
           (tray-close tray)
-          (send frame show #f)))))
+          (exit)))))
 
 (send frame show #t)
 ```
 
 `mk-tray` and `tray-set-icon!` accept both Windows `.ico` files and `.png`
-files. PNG transparency is preserved when the image is converted to the native
+files. PNG transparency is preserved when the image is converted to a native
 Windows tray icon.
 
-`tray-set-menu!` also accepts a `popup-menu%` object directly, or `#f` to
-remove the context menu.
+With `#:hide-on-minimize? #t`, minimizing the associated window hides it from
+the taskbar while keeping its native window handle alive. Closing a window to
+the tray does not need a separate tray API: override `frame%`'s `on-close` and
+call `(send this show #f)`.
+
+`tray-set-menu!` accepts a `popup-menu%` object directly, a simple menu list,
+or `#f` to remove the context menu.
 
 At the moment non-Windows platforms report that the operation is unsupported.