| 1 | """ |
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| 2 | ASAP plotting class based on matplotlib. |
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| 3 | """ |
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| 4 | |
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| 5 | import sys |
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| 6 | from re import match |
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| 7 | import Tkinter as Tk |
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| 8 | |
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| 9 | #print "Importing matplotlib with TkAgg backend." |
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| 10 | import matplotlib |
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| 11 | matplotlib.use("TkAgg") |
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| 12 | |
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| 13 | from matplotlib.backends import new_figure_manager, show |
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| 14 | from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, \ |
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| 15 | FigureManagerTkAgg |
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| 16 | from matplotlib.figure import Figure, Text |
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| 17 | from matplotlib.numerix import sqrt |
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| 18 | from matplotlib import rc,rcParams |
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| 19 | |
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| 20 | # Force use of the newfangled toolbar. |
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| 21 | matplotlib.rcParams['toolbar'] = 'toolbar2' |
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| 22 | |
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| 23 | # Colour dictionary. |
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| 24 | colours = {} |
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| 25 | |
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| 26 | class ASAPlot: |
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| 27 | """ |
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| 28 | ASAP plotting class based on matplotlib. |
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| 29 | """ |
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| 30 | |
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| 31 | def __init__(self, rows=1, cols=0, title='', size=(7,5), buffering=False): |
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| 32 | """ |
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| 33 | Create a new instance of the ASAPlot plotting class. |
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| 34 | |
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| 35 | If rows < 1 then a separate call to set_panels() is required to define |
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| 36 | the panel layout; refer to the doctext for set_panels(). |
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| 37 | """ |
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| 38 | self.window = Tk.Tk() |
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| 39 | self.is_dead = False |
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| 40 | def dest_callback(): |
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| 41 | self.is_dead = True |
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| 42 | self.window.destroy() |
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| 43 | |
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| 44 | self.window.protocol("WM_DELETE_WINDOW", dest_callback) |
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| 45 | #self.frame1 = Tk.Frame(self.window, relief=Tk.RIDGE, borderwidth=4) |
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| 46 | #self.frame1.pack(fill=Tk.BOTH) |
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| 47 | |
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| 48 | self.figure = Figure(figsize=size,facecolor='#ddddee') |
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| 49 | self.canvas = FigureCanvasTkAgg(self.figure, master=self.window) |
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| 50 | self.canvas.get_tk_widget().pack(side=Tk.TOP, fill=Tk.BOTH, expand=1) |
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| 51 | |
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| 52 | # Simply instantiating this is enough to get a working toolbar. |
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| 53 | self.figmgr = FigureManagerTkAgg(self.canvas, 1, self.window) |
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| 54 | self.window.wm_title('ASAPlot graphics window') |
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| 55 | |
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| 56 | self.events = {'button_press':None, |
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| 57 | 'button_release':None, |
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| 58 | 'motion_notify':None} |
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| 59 | |
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| 60 | self.set_title(title) |
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| 61 | self.subplots = [] |
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| 62 | if rows > 0: |
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| 63 | self.set_panels(rows, cols) |
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| 64 | |
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| 65 | |
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| 66 | # Set matplotlib default colour sequence. |
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| 67 | self.colours = [1, 'b', 'g', 'r', 'c', 'm', 'y', 'k'] |
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| 68 | self.attributes = {} |
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| 69 | self.loc = 1 |
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| 70 | |
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| 71 | matplotlib.interactive = True |
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| 72 | self.buffering = buffering |
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| 73 | |
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| 74 | self.canvas.show() |
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| 75 | |
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| 76 | |
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| 77 | def clear(self): |
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| 78 | """ |
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| 79 | Delete all lines from the plot. Line numbering will restart from 1. |
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| 80 | """ |
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| 81 | |
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| 82 | for i in range(1,len(self.lines)+1): |
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| 83 | self.delete(i) |
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| 84 | |
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| 85 | self.axes.clear() |
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| 86 | self.colours[0] = 1 |
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| 87 | self.lines = [] |
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| 88 | |
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| 89 | |
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| 90 | def delete(self, numbers=None): |
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| 91 | """ |
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| 92 | Delete the 0-relative line number, default is to delete the last. |
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| 93 | The remaining lines are NOT renumbered. |
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| 94 | """ |
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| 95 | |
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| 96 | if numbers is None: numbers = [len(self.lines)-1] |
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| 97 | |
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| 98 | if not hasattr(numbers, '__iter__'): |
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| 99 | numbers = [numbers] |
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| 100 | |
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| 101 | for number in numbers: |
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| 102 | if 0 <= number < len(self.lines): |
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| 103 | if self.lines[number] is not None: |
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| 104 | for line in self.lines[number]: |
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| 105 | line.set_linestyle('None') |
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| 106 | self.lines[number] = None |
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| 107 | |
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| 108 | self.show() |
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| 109 | |
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| 110 | |
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| 111 | def get_line(self): |
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| 112 | """ |
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| 113 | Get the current default line attributes. |
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| 114 | """ |
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| 115 | return self.attributes |
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| 116 | |
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| 117 | |
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| 118 | def hist(self, x=None, y=None, fmt=None): |
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| 119 | """ |
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| 120 | Plot a histogram. N.B. the x values refer to the start of the |
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| 121 | histogram bin. |
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| 122 | |
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| 123 | fmt is the line style as in plot(). |
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| 124 | """ |
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| 125 | |
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| 126 | if x is None: |
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| 127 | if y is None: return |
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| 128 | x = range(0,len(y)) |
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| 129 | |
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| 130 | if len(x) != len(y): |
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| 131 | return |
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| 132 | |
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| 133 | l2 = 2*len(x) |
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| 134 | x2 = range(0,l2) |
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| 135 | y2 = range(0,l2) |
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| 136 | |
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| 137 | for i in range(0,l2): |
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| 138 | x2[i] = x[i/2] |
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| 139 | |
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| 140 | y2[0] = 0 |
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| 141 | for i in range(1,l2): |
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| 142 | y2[i] = y[(i-1)/2] |
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| 143 | |
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| 144 | self.plot(x2, y2, fmt) |
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| 145 | |
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| 146 | |
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| 147 | def hold(self, hold=True): |
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| 148 | """ |
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| 149 | Buffer graphics until subsequently released. |
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| 150 | """ |
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| 151 | self.buffering = hold |
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| 152 | |
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| 153 | |
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| 154 | def legend(self, loc=1): |
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| 155 | """ |
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| 156 | Add a legend to the plot. |
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| 157 | |
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| 158 | Any other value for loc else disables the legend: |
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| 159 | 1: upper right |
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| 160 | 2: upper left |
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| 161 | 3: lower left |
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| 162 | 4: lower right |
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| 163 | 5: right |
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| 164 | 6: center left |
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| 165 | 7: center right |
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| 166 | 8: lower center |
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| 167 | 9: upper center |
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| 168 | 10: center |
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| 169 | |
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| 170 | """ |
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| 171 | if 1 > loc > 10: loc = 0 |
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| 172 | self.loc = loc |
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| 173 | self.show() |
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| 174 | |
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| 175 | |
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| 176 | def map(self): |
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| 177 | """ |
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| 178 | Reveal the ASAPlot graphics window and bring it to the top of the |
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| 179 | window stack. |
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| 180 | """ |
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| 181 | self.window.wm_deiconify() |
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| 182 | self.window.lift() |
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| 183 | |
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| 184 | |
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| 185 | def palette(self, pen=None, colours=None): |
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| 186 | """ |
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| 187 | Redefine the colour sequence. |
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| 188 | |
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| 189 | pen is the pen number to use for the next plot; this will be auto- |
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| 190 | incremented. |
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| 191 | |
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| 192 | colours is the list of pen colours. Colour may be specified via |
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| 193 | the single letter values understood by matplotlib: |
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| 194 | |
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| 195 | b: blue |
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| 196 | g: green |
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| 197 | r: red |
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| 198 | c: cyan |
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| 199 | m: magenta |
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| 200 | y: yellow |
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| 201 | k: black |
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| 202 | w: white |
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| 203 | |
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| 204 | or via the full name as listed in the colour dictionary which is |
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| 205 | loaded by default by load_colours() from rgb.txt and listed by |
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| 206 | list_colours(). |
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| 207 | """ |
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| 208 | |
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| 209 | if pen is None and colours is None: |
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| 210 | self.colours = [] |
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| 211 | return |
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| 212 | |
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| 213 | if pen is None: |
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| 214 | if not len(self.colours): |
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| 215 | self.colours = [1] |
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| 216 | else: |
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| 217 | self.colours[0] = pen |
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| 218 | |
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| 219 | if colours is None: |
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| 220 | return |
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| 221 | |
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| 222 | cols = [] |
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| 223 | for col in colours: |
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| 224 | cols.append(get_colour(col)) |
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| 225 | |
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| 226 | self.colours[1:] = cols |
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| 227 | |
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| 228 | if 0 > self.colours[0] > len(self.colours): |
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| 229 | self.colours[0] = 1 |
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| 230 | |
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| 231 | |
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| 232 | def plot(self, x=None, y=None, mask=None, fmt=None, add=None): |
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| 233 | """ |
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| 234 | Plot the next line in the current frame using the current line |
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| 235 | attributes. The ASAPlot graphics window will be mapped and raised. |
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| 236 | |
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| 237 | The argument list works a bit like the matlab plot() function. |
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| 238 | """ |
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| 239 | |
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| 240 | if x is None: |
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| 241 | if y is None: return |
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| 242 | x = range(len(y)) |
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| 243 | |
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| 244 | elif y is None: |
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| 245 | y = x |
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| 246 | x = range(len(y)) |
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| 247 | |
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| 248 | if mask is None: |
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| 249 | if fmt is None: |
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| 250 | line = self.axes.plot(x, y) |
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| 251 | else: |
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| 252 | line = self.axes.plot(x, y, fmt) |
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| 253 | else: |
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| 254 | segments = [] |
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| 255 | |
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| 256 | mask = list(mask) |
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| 257 | i = 0 |
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| 258 | while mask[i:].count(1): |
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| 259 | i += mask[i:].index(1) |
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| 260 | if mask[i:].count(0): |
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| 261 | j = i + mask[i:].index(0) |
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| 262 | else: |
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| 263 | j = len(mask) |
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| 264 | |
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| 265 | segments.append(x[i:j]) |
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| 266 | segments.append(y[i:j]) |
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| 267 | |
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| 268 | i = j |
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| 269 | |
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| 270 | line = self.axes.plot(*segments) |
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| 271 | |
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| 272 | # Add to an existing line? |
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| 273 | if add is None or len(self.lines) < add < 0: |
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| 274 | # Don't add. |
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| 275 | self.lines.append(line) |
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| 276 | i = len(self.lines) - 1 |
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| 277 | else: |
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| 278 | if add == 0: add = len(self.lines) |
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| 279 | i = add - 1 |
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| 280 | self.lines[i].extend(line) |
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| 281 | |
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| 282 | # Set/reset attributes for the line. |
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| 283 | gotcolour = False |
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| 284 | for k, v in self.attributes.iteritems(): |
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| 285 | if k == 'color': gotcolour = True |
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| 286 | for segment in self.lines[i]: |
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| 287 | getattr(segment, "set_%s"%k)(v) |
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| 288 | |
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| 289 | if not gotcolour and len(self.colours): |
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| 290 | for segment in self.lines[i]: |
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| 291 | getattr(segment, "set_color")(self.colours[self.colours[0]]) |
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| 292 | |
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| 293 | self.colours[0] += 1 |
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| 294 | if self.colours[0] >= len(self.colours): |
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| 295 | self.colours[0] = 1 |
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| 296 | |
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| 297 | self.show() |
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| 298 | |
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| 299 | |
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| 300 | def quit(self): |
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| 301 | """ |
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| 302 | Destroy the ASAPlot graphics window. |
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| 303 | """ |
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| 304 | self.window.destroy() |
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| 305 | |
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| 306 | |
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| 307 | def register(self, type=None, func=None): |
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| 308 | """ |
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| 309 | Register, reregister, or deregister events of type 'button_press', |
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| 310 | 'button_release', or 'motion_notify'. |
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| 311 | |
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| 312 | The specified callback function should have the following signature: |
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| 313 | |
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| 314 | def func(event) |
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| 315 | |
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| 316 | where event is an MplEvent instance containing the following data: |
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| 317 | |
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| 318 | name # Event name. |
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| 319 | canvas # FigureCanvas instance generating the event. |
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| 320 | x = None # x position - pixels from left of canvas. |
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| 321 | y = None # y position - pixels from bottom of canvas. |
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| 322 | button = None # Button pressed: None, 1, 2, 3. |
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| 323 | key = None # Key pressed: None, chr(range(255)), shift, |
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| 324 | win, or control |
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| 325 | inaxes = None # Axes instance if cursor within axes. |
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| 326 | xdata = None # x world coordinate. |
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| 327 | ydata = None # y world coordinate. |
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| 328 | |
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| 329 | For example: |
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| 330 | |
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| 331 | def mouse_move(event): |
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| 332 | print event.xdata, event.ydata |
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| 333 | |
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| 334 | a = asaplot() |
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| 335 | a.register('motion_notify', mouse_move) |
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| 336 | |
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| 337 | If func is None, the event is deregistered. |
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| 338 | |
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| 339 | Note that in TkAgg keyboard button presses don't generate an event. |
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| 340 | """ |
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| 341 | |
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| 342 | if not self.events.has_key(type): return |
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| 343 | |
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| 344 | if func is None: |
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| 345 | if self.events[type] is not None: |
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| 346 | # It's not clear that this does anything. |
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| 347 | self.canvas.mpl_disconnect(self.events[type]) |
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| 348 | self.events[type] = None |
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| 349 | |
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| 350 | # It seems to be necessary to return events to the toolbar. |
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| 351 | if type == 'motion_notify': |
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| 352 | self.canvas.mpl_connect(type + '_event', |
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| 353 | self.figmgr.toolbar.mouse_move) |
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| 354 | elif type == 'button_press': |
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| 355 | self.canvas.mpl_connect(type + '_event', |
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| 356 | self.figmgr.toolbar.press) |
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| 357 | elif type == 'button_release': |
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| 358 | self.canvas.mpl_connect(type + '_event', |
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| 359 | self.figmgr.toolbar.release) |
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| 360 | |
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| 361 | else: |
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| 362 | self.events[type] = self.canvas.mpl_connect(type + '_event', func) |
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| 363 | |
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| 364 | |
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| 365 | def release(self): |
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| 366 | """ |
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| 367 | Release buffered graphics. |
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| 368 | """ |
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| 369 | self.buffering = False |
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| 370 | self.show() |
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| 371 | |
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| 372 | |
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| 373 | def set_axes(self, what=None, *args, **kwargs): |
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| 374 | """ |
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| 375 | Set attributes for the axes by calling the relevant Axes.set_*() |
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| 376 | method. Colour translation is done as described in the doctext |
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| 377 | for palette(). |
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| 378 | """ |
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| 379 | |
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| 380 | if what is None: return |
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| 381 | if what[-6:] == 'colour': what = what[:-6] + 'color' |
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| 382 | |
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| 383 | newargs = {} |
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| 384 | for k, v in kwargs.iteritems(): |
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| 385 | k = k.lower() |
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| 386 | if k == 'colour': k = 'color' |
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| 387 | |
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| 388 | if k == 'color': |
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| 389 | v = get_colour(v) |
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| 390 | |
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| 391 | newargs[k] = v |
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| 392 | |
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| 393 | getattr(self.axes, "set_%s"%what)(*args, **newargs) |
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| 394 | self.show() |
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| 395 | |
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| 396 | |
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| 397 | def set_figure(self, what=None, *args, **kwargs): |
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| 398 | """ |
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| 399 | Set attributes for the figure by calling the relevant Figure.set_*() |
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| 400 | method. Colour translation is done as described in the doctext |
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| 401 | for palette(). |
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| 402 | """ |
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| 403 | |
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| 404 | if what is None: return |
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| 405 | if what[-6:] == 'colour': what = what[:-6] + 'color' |
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| 406 | if what[-5:] == 'color' and len(args): |
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| 407 | args = (get_colour(args[0]),) |
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| 408 | |
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| 409 | newargs = {} |
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| 410 | for k, v in kwargs.iteritems(): |
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| 411 | k = k.lower() |
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| 412 | if k == 'colour': k = 'color' |
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| 413 | |
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| 414 | if k == 'color': |
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| 415 | v = get_colour(v) |
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| 416 | |
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| 417 | newargs[k] = v |
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| 418 | |
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| 419 | getattr(self.figure, "set_%s"%what)(*args, **newargs) |
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| 420 | self.show() |
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| 421 | |
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| 422 | |
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| 423 | def set_line(self, number=None, **kwargs): |
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| 424 | """ |
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| 425 | Set attributes for the specified line, or else the next line(s) |
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| 426 | to be plotted. |
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| 427 | |
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| 428 | number is the 0-relative number of a line that has already been |
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| 429 | plotted. If no such line exists, attributes are recorded and used |
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| 430 | for the next line(s) to be plotted. |
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| 431 | |
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| 432 | Keyword arguments specify Line2D attributes, e.g. color='r'. Do |
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| 433 | |
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| 434 | import matplotlib |
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| 435 | help(matplotlib.lines) |
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| 436 | |
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| 437 | The set_* methods of class Line2D define the attribute names and |
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| 438 | values. For non-US usage, "colour" is recognized as synonymous with |
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| 439 | "color". |
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| 440 | |
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| 441 | Set the value to None to delete an attribute. |
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| 442 | |
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| 443 | Colour translation is done as described in the doctext for palette(). |
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| 444 | """ |
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| 445 | |
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| 446 | redraw = False |
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| 447 | for k, v in kwargs.iteritems(): |
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| 448 | k = k.lower() |
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| 449 | if k == 'colour': k = 'color' |
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| 450 | |
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| 451 | if k == 'color': |
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| 452 | v = get_colour(v) |
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| 453 | |
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| 454 | if 0 <= number < len(self.lines): |
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| 455 | if self.lines[number] is not None: |
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| 456 | for line in self.lines[number]: |
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| 457 | getattr(line, "set_%s"%k)(v) |
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| 458 | redraw = True |
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| 459 | else: |
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| 460 | if v is None: |
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| 461 | del self.attributes[k] |
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| 462 | else: |
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| 463 | self.attributes[k] = v |
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| 464 | |
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| 465 | if redraw: self.show() |
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| 466 | |
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| 467 | |
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| 468 | def set_panels(self, rows=1, cols=0, n=-1, nplots=-1): |
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| 469 | """ |
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| 470 | Set the panel layout. |
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| 471 | |
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| 472 | rows and cols, if cols != 0, specify the number of rows and columns in |
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| 473 | a regular layout. (Indexing of these panels in matplotlib is row- |
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| 474 | major, i.e. column varies fastest.) |
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| 475 | |
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| 476 | cols == 0 is interpreted as a retangular layout that accomodates |
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| 477 | 'rows' panels, e.g. rows == 6, cols == 0 is equivalent to |
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| 478 | rows == 2, cols == 3. |
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| 479 | |
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| 480 | 0 <= n < rows*cols is interpreted as the 0-relative panel number in |
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| 481 | the configuration specified by rows and cols to be added to the |
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| 482 | current figure as its next 0-relative panel number (i). This allows |
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| 483 | non-regular panel layouts to be constructed via multiple calls. Any |
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| 484 | other value of n clears the plot and produces a rectangular array of |
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| 485 | empty panels. |
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| 486 | """ |
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| 487 | if n < 0 and len(self.subplots): |
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| 488 | self.figure.clear() |
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| 489 | self.set_title() |
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| 490 | |
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| 491 | if rows < 1: |
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| 492 | rows = 1 |
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| 493 | nel = 1 |
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| 494 | if cols == 0: |
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| 495 | nel = rows |
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| 496 | i = int(sqrt(rows)) |
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| 497 | if i*i < rows: i += 1 |
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| 498 | cols = i |
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| 499 | |
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| 500 | if i*(i-1) >= rows: i -= 1 |
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| 501 | rows = i |
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| 502 | else: |
|---|
| 503 | if nplots > -1: |
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| 504 | nel=nplots |
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| 505 | if 0 <= n < rows*cols: |
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| 506 | i = len(self.subplots) |
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| 507 | self.subplots.append({}) |
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| 508 | self.subplots[i]['axes'] = self.figure.add_subplot(rows, |
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| 509 | cols, n+1) |
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| 510 | self.subplots[i]['lines'] = [] |
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| 511 | |
|---|
| 512 | if i == 0: self.subplot(0) |
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| 513 | |
|---|
| 514 | else: |
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| 515 | self.subplots = [] |
|---|
| 516 | for i in range(nel): |
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| 517 | self.subplots.append({}) |
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| 518 | self.subplots[i]['axes'] = self.figure.add_subplot(rows, |
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| 519 | cols, i+1) |
|---|
| 520 | self.subplots[i]['lines'] = [] |
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| 521 | |
|---|
| 522 | self.subplot(0) |
|---|
| 523 | |
|---|
| 524 | |
|---|
| 525 | def set_title(self, title=None): |
|---|
| 526 | """ |
|---|
| 527 | Set the title of the plot window. Use the previous title if title is |
|---|
| 528 | omitted. |
|---|
| 529 | """ |
|---|
| 530 | if title is not None: |
|---|
| 531 | self.title = title |
|---|
| 532 | |
|---|
| 533 | self.figure.text(0.5, 0.95, self.title, horizontalalignment='center') |
|---|
| 534 | |
|---|
| 535 | |
|---|
| 536 | def show(self): |
|---|
| 537 | """ |
|---|
| 538 | Show graphics dependent on the current buffering state. |
|---|
| 539 | """ |
|---|
| 540 | if not self.buffering: |
|---|
| 541 | if self.loc: |
|---|
| 542 | for j in range(len(self.subplots)): |
|---|
| 543 | lines = [] |
|---|
| 544 | labels = [] |
|---|
| 545 | i = 0 |
|---|
| 546 | for line in self.subplots[j]['lines']: |
|---|
| 547 | i += 1 |
|---|
| 548 | if line is not None: |
|---|
| 549 | lines.append(line[0]) |
|---|
| 550 | lbl = line[0].get_label() |
|---|
| 551 | if lbl == '': |
|---|
| 552 | lbl = str(i) |
|---|
| 553 | labels.append(lbl) |
|---|
| 554 | |
|---|
| 555 | if len(lines): |
|---|
| 556 | self.subplots[j]['axes'].legend(tuple(lines), tuple(labels), self.loc) |
|---|
| 557 | else: |
|---|
| 558 | self.subplots[j]['axes'].legend((' ')) |
|---|
| 559 | |
|---|
| 560 | self.window.wm_deiconify() |
|---|
| 561 | self.canvas.show() |
|---|
| 562 | |
|---|
| 563 | |
|---|
| 564 | def subplot(self, i=None, inc=None): |
|---|
| 565 | """ |
|---|
| 566 | Set the subplot to the 0-relative panel number as defined by one or |
|---|
| 567 | more invokations of set_panels(). |
|---|
| 568 | """ |
|---|
| 569 | l = len(self.subplots) |
|---|
| 570 | if l: |
|---|
| 571 | if i is not None: |
|---|
| 572 | self.i = i |
|---|
| 573 | |
|---|
| 574 | if inc is not None: |
|---|
| 575 | self.i += inc |
|---|
| 576 | |
|---|
| 577 | self.i %= l |
|---|
| 578 | self.axes = self.subplots[self.i]['axes'] |
|---|
| 579 | self.lines = self.subplots[self.i]['lines'] |
|---|
| 580 | |
|---|
| 581 | |
|---|
| 582 | def terminate(self): |
|---|
| 583 | """ |
|---|
| 584 | Clear the figure. |
|---|
| 585 | """ |
|---|
| 586 | self.window.destroy() |
|---|
| 587 | |
|---|
| 588 | |
|---|
| 589 | def text(self, *args, **kwargs): |
|---|
| 590 | """ |
|---|
| 591 | Add text to the figure. |
|---|
| 592 | """ |
|---|
| 593 | self.figure.text(*args, **kwargs) |
|---|
| 594 | self.show() |
|---|
| 595 | |
|---|
| 596 | def unmap(self): |
|---|
| 597 | """ |
|---|
| 598 | Hide the ASAPlot graphics window. |
|---|
| 599 | """ |
|---|
| 600 | self.window.wm_withdraw() |
|---|
| 601 | |
|---|
| 602 | def set_limits(self,xlim=None,ylim=None): |
|---|
| 603 | for s in self.subplots: |
|---|
| 604 | self.axes = s['axes'] |
|---|
| 605 | self.lines = s['lines'] |
|---|
| 606 | if xlim is not None: |
|---|
| 607 | self.axes.set_xlim(xlim) |
|---|
| 608 | if ylim is not None: |
|---|
| 609 | self.axes.set_ylim(ylim) |
|---|
| 610 | return |
|---|
| 611 | |
|---|
| 612 | def save(self, fname=None): |
|---|
| 613 | """ |
|---|
| 614 | Save the plot to a file. The know formats are 'png', 'ps', 'eps'. |
|---|
| 615 | Parameters: |
|---|
| 616 | filename: The name of the output file. This is optional |
|---|
| 617 | and autodetects the image format from the file |
|---|
| 618 | suffix. If non filename is specified a file |
|---|
| 619 | called 'yyyymmdd_hhmmss.png' is created in the |
|---|
| 620 | current directory. |
|---|
| 621 | """ |
|---|
| 622 | if fname is None: |
|---|
| 623 | from datetime import datetime |
|---|
| 624 | dstr = datetime.now().strftime('%Y%m%d_%H%M%S') |
|---|
| 625 | fname = 'asap'+dstr+'.png' |
|---|
| 626 | |
|---|
| 627 | d = ['png','.ps','eps'] |
|---|
| 628 | if fname[-3:].lower() in d: |
|---|
| 629 | try: |
|---|
| 630 | self.canvas.print_figure(fname) |
|---|
| 631 | print 'Written file %s' % (fname) |
|---|
| 632 | except IOError, msg: |
|---|
| 633 | print 'Failed to save %s: Error msg was\n\n%s' % (fname, err) |
|---|
| 634 | return |
|---|
| 635 | else: |
|---|
| 636 | print "Invalid image type. Valid types are:" |
|---|
| 637 | print "ps, eps, png" |
|---|
| 638 | |
|---|
| 639 | |
|---|
| 640 | def get_colour(colour='black'): |
|---|
| 641 | """ |
|---|
| 642 | Look up a colour by name in the colour dictionary. Matches are |
|---|
| 643 | case-insensitive, insensitive to blanks, and 'gray' matches 'grey'. |
|---|
| 644 | """ |
|---|
| 645 | |
|---|
| 646 | if colour is None: return None |
|---|
| 647 | |
|---|
| 648 | if match('[rgbcmykw]$', colour): return colour |
|---|
| 649 | if match('#[\da-fA-F]{6}$', colour): return colour |
|---|
| 650 | |
|---|
| 651 | if len(colours) == 0: load_colours() |
|---|
| 652 | |
|---|
| 653 | # Try a quick match. |
|---|
| 654 | if colours.has_key(colour): return colours[colour] |
|---|
| 655 | |
|---|
| 656 | colour = colour.replace(' ','').lower() |
|---|
| 657 | colour = colour.replace('gray','grey') |
|---|
| 658 | for name in colours.keys(): |
|---|
| 659 | if name.lower() == colour: |
|---|
| 660 | return colours[name] |
|---|
| 661 | |
|---|
| 662 | return '#000000' |
|---|
| 663 | |
|---|
| 664 | |
|---|
| 665 | def list_colours(): |
|---|
| 666 | """ |
|---|
| 667 | List the contents of the colour dictionary sorted by name. |
|---|
| 668 | """ |
|---|
| 669 | |
|---|
| 670 | if len(colours) == 0: load_colours() |
|---|
| 671 | |
|---|
| 672 | names = colours.keys() |
|---|
| 673 | names.sort() |
|---|
| 674 | for name in names: |
|---|
| 675 | print colours[name], name |
|---|
| 676 | |
|---|
| 677 | |
|---|
| 678 | def load_colours(file='/usr/local/lib/rgb.txt'): |
|---|
| 679 | """ |
|---|
| 680 | Load the colour dictionary from the specified file. |
|---|
| 681 | """ |
|---|
| 682 | print 'Loading colour dictionary from', file |
|---|
| 683 | rgb = open(file, 'r') |
|---|
| 684 | |
|---|
| 685 | while True: |
|---|
| 686 | line = rgb.readline() |
|---|
| 687 | if line == '': break |
|---|
| 688 | tmp = line.split() |
|---|
| 689 | |
|---|
| 690 | if len(tmp) == 4: |
|---|
| 691 | if tmp[3][:4] == 'gray': continue |
|---|
| 692 | if tmp[3].lower().find('gray') != -1: continue |
|---|
| 693 | |
|---|
| 694 | name = tmp[3][0].upper() + tmp[3][1:] |
|---|
| 695 | r, g, b = int(tmp[0]), int(tmp[1]), int(tmp[2]) |
|---|
| 696 | colours[name] = '#%2.2x%2.2x%2.2x' % (r, g, b) |
|---|
