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;; Copyright (c) Stephen C. Gilardi. All rights reserved. The use and
;; distribution terms for this software are covered by the Eclipse Public
;; License 1.0 (http://opensource.org/licenses/eclipse-1.0.php) which can
;; be found in the file epl-v10.html at the root of this distribution. By
;; using this software in any fashion, you are agreeing to be bound by the
;; terms of this license. You must not remove this notice, or any other,
;; from this software.
;;
;; clojure.contrib.miglayout.example
;;
;; Temperature converter using miglayout. Demonstrates accessing components
;; by their id constraint.
;;
;; scgilardi (gmail)
;; Created 31 May 2009
(ns clojure.contrib.miglayout.example
(:import (javax.swing JButton JFrame JLabel JPanel JTextField))
(:use (clojure.contrib
[miglayout :only (miglayout components)]
[swing-utils :only (add-action-listener)])))
(defn fahrenheit
"Converts a Celsius temperature to Fahrenheit. Input and output are
strings. Returns \"input?\" if the input can't be parsed as a Double."
[celsius]
(try
(format "%.2f \u00b0Fahrenheit"
(+ 32 (* 1.8 (Double/parseDouble celsius))))
(catch NumberFormatException _
"input?")))
(defn main
"Lays out and displays the Temperature Converter UI"
[]
(let [panel
(miglayout (JPanel.)
(JTextField.) {:id :input :width 120}
(JLabel. "\u00b0Celsius") :wrap
(JButton. "Convert") {:id :convert}
(JLabel. "\u00b0Fahrenheit") {:id :output :width 120})
{:keys [convert input output]} (components panel)]
(add-action-listener convert
(fn [evt in out] (.setText out (fahrenheit (.getText in))))
input output)
(doto (JFrame. "Temperature Converter")
(.add panel)
(.pack)
(.setVisible true))))
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