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rlm@0
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1 (ns rlm.simple-drawing)
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2
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3
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4
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5 (def max-x 500)
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6 (def max-y 500)
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7 (def shapes (atom []))
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8
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9
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10 (defn render-shape
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11 [graphics [shape-name x y w h r g b a]]
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12 (.setColor graphics (java.awt.Color. r g b a))
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13 (case shape-name
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14 rect (.fillRect graphics x y w h)
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15 oval (.fillOval graphics x y w h)
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16 line (.drawLine graphics x y w h)))
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17
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18 (def panel
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19 (let [jp (proxy [javax.swing.JPanel]
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20 []
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21 (getPreferredSize [] (java.awt.Dimension. max-x max-y))
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22 (paint [g]
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23 (render-shape g ['rect 0 0 max-x max-y 255 255 255 255])
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24 (doall (map #(render-shape g %) @shapes))))]
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25 (doto (new javax.swing.JFrame "My graphics window")
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26 (.setSize max-x max-y)
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27 (.add jp)
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28 (.setVisible true))
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29 jp))
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30
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31
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32 (defn draw-shape [& shape]
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33 "Adds a shape to the current drawing. The first argument should be one of
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34 the following symbols: rect, oval, or line. For rect or oval this should
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35 be followed by: x, y, width, height, red, green, blue, alpha. The x and y
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36 coordinates specify the upper right corner. Color values (including alpha,
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37 which is opacity) should range from 0 to 255. For line the arguments are
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38 the remaining arguments are x-start, y-start, x-end, y-end, red, green,
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39 blue, alpha."
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40 (swap! shapes conj shape)
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41 (.paint panel (.getGraphics panel)))
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42
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43 (defn run []
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44
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45 (draw-shape 'rect 20 20 460 80 255 128 0 255)
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46 (draw-shape 'oval 120 120 300 100 100 128 0 255)
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47 (draw-shape 'line 0 0 500 500 255 0 0 255)
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48 )
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