| 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'
|
|---|
| 450 |
|
|---|
| 451 | if k == 'color':
|
|---|
| 452 | v = get_colour(v)
|
|---|
| 453 |
|
|---|
| 454 | if 0 <= number < len(self.lines):
|
|---|
| 455 | if self.lines[number] is not None:
|
|---|
| 456 | for line in self.lines[number]:
|
|---|
| 457 | getattr(line, "set_%s"%k)(v)
|
|---|
| 458 | redraw = True
|
|---|
| 459 | else:
|
|---|
| 460 | if v is None:
|
|---|
| 461 | del self.attributes[k]
|
|---|
| 462 | else:
|
|---|
| 463 | self.attributes[k] = v
|
|---|
| 464 |
|
|---|
| 465 | if redraw: self.show()
|
|---|
| 466 |
|
|---|
| 467 |
|
|---|
| 468 | def set_panels(self, rows=1, cols=0, n=-1, nplots=-1):
|
|---|
| 469 | """
|
|---|
| 470 | Set the panel layout.
|
|---|
| 471 |
|
|---|
| 472 | rows and cols, if cols != 0, specify the number of rows and columns in
|
|---|
| 473 | a regular layout. (Indexing of these panels in matplotlib is row-
|
|---|
| 474 | major, i.e. column varies fastest.)
|
|---|
| 475 |
|
|---|
| 476 | cols == 0 is interpreted as a retangular layout that accomodates
|
|---|
| 477 | 'rows' panels, e.g. rows == 6, cols == 0 is equivalent to
|
|---|
| 478 | rows == 2, cols == 3.
|
|---|
| 479 |
|
|---|
| 480 | 0 <= n < rows*cols is interpreted as the 0-relative panel number in
|
|---|
| 481 | the configuration specified by rows and cols to be added to the
|
|---|
| 482 | current figure as its next 0-relative panel number (i). This allows
|
|---|
| 483 | non-regular panel layouts to be constructed via multiple calls. Any
|
|---|
| 484 | other value of n clears the plot and produces a rectangular array of
|
|---|
| 485 | empty panels.
|
|---|
| 486 | """
|
|---|
| 487 | if n < 0 and len(self.subplots):
|
|---|
| 488 | self.figure.clear()
|
|---|
| 489 | self.set_title()
|
|---|
| 490 |
|
|---|
| 491 | if rows < 1:
|
|---|
| 492 | rows = 1
|
|---|
| 493 | nel = 1
|
|---|
| 494 | if cols == 0:
|
|---|
| 495 | nel = rows
|
|---|
| 496 | i = int(sqrt(rows))
|
|---|
| 497 | if i*i < rows: i += 1
|
|---|
| 498 | cols = i
|
|---|
| 499 |
|
|---|
| 500 | if i*(i-1) >= rows: i -= 1
|
|---|
| 501 | rows = i
|
|---|
| 502 | else:
|
|---|
| 503 | if nplots > -1:
|
|---|
| 504 | nel=nplots
|
|---|
| 505 | if 0 <= n < rows*cols:
|
|---|
| 506 | i = len(self.subplots)
|
|---|
| 507 | self.subplots.append({})
|
|---|
| 508 | self.subplots[i]['axes'] = self.figure.add_subplot(rows,
|
|---|
| 509 | cols, n+1)
|
|---|
| 510 | self.subplots[i]['lines'] = []
|
|---|
| 511 |
|
|---|
| 512 | if i == 0: self.subplot(0)
|
|---|
| 513 |
|
|---|
| 514 | else:
|
|---|
| 515 | self.subplots = []
|
|---|
| 516 | for i in range(nel):
|
|---|
| 517 | self.subplots.append({})
|
|---|
| 518 | self.subplots[i]['axes'] = self.figure.add_subplot(rows,
|
|---|
| 519 | cols, i+1)
|
|---|
| 520 | self.subplots[i]['lines'] = []
|
|---|
| 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 |
|
|---|
| 629 | from os.path import expandvars
|
|---|
| 630 | fname = expandvars(fname)
|
|---|
| 631 |
|
|---|
| 632 | if fname[-3:].lower() in d:
|
|---|
| 633 | try:
|
|---|
| 634 | self.canvas.print_figure(fname)
|
|---|
| 635 | print 'Written file %s' % (fname)
|
|---|
| 636 | except IOError, msg:
|
|---|
| 637 | print 'Failed to save %s: Error msg was\n\n%s' % (fname, err)
|
|---|
| 638 | return
|
|---|
| 639 | else:
|
|---|
| 640 | print "Invalid image type. Valid types are:"
|
|---|
| 641 | print "ps, eps, png"
|
|---|
| 642 |
|
|---|
| 643 |
|
|---|
| 644 | def get_colour(colour='black'):
|
|---|
| 645 | """
|
|---|
| 646 | Look up a colour by name in the colour dictionary. Matches are
|
|---|
| 647 | case-insensitive, insensitive to blanks, and 'gray' matches 'grey'.
|
|---|
| 648 | """
|
|---|
| 649 |
|
|---|
| 650 | if colour is None: return None
|
|---|
| 651 |
|
|---|
| 652 | if match('[rgbcmykw]$', colour): return colour
|
|---|
| 653 | if match('#[\da-fA-F]{6}$', colour): return colour
|
|---|
| 654 |
|
|---|
| 655 | if len(colours) == 0: load_colours()
|
|---|
| 656 |
|
|---|
| 657 | # Try a quick match.
|
|---|
| 658 | if colours.has_key(colour): return colours[colour]
|
|---|
| 659 |
|
|---|
| 660 | colour = colour.replace(' ','').lower()
|
|---|
| 661 | colour = colour.replace('gray','grey')
|
|---|
| 662 | for name in colours.keys():
|
|---|
| 663 | if name.lower() == colour:
|
|---|
| 664 | return colours[name]
|
|---|
| 665 |
|
|---|
| 666 | return '#000000'
|
|---|
| 667 |
|
|---|
| 668 |
|
|---|
| 669 | def list_colours():
|
|---|
| 670 | """
|
|---|
| 671 | List the contents of the colour dictionary sorted by name.
|
|---|
| 672 | """
|
|---|
| 673 |
|
|---|
| 674 | if len(colours) == 0: load_colours()
|
|---|
| 675 |
|
|---|
| 676 | names = colours.keys()
|
|---|
| 677 | names.sort()
|
|---|
| 678 | for name in names:
|
|---|
| 679 | print colours[name], name
|
|---|
| 680 |
|
|---|
| 681 |
|
|---|
| 682 | def load_colours(filename='/usr/local/lib/rgb.txt'):
|
|---|
| 683 | """
|
|---|
| 684 | Load the colour dictionary from the specified file.
|
|---|
| 685 | """
|
|---|
| 686 | print 'Loading colour dictionary from', file
|
|---|
| 687 | from os.path import expandvars
|
|---|
| 688 | filename = expandvars(filename)
|
|---|
| 689 | rgb = open(filename, 'r')
|
|---|
| 690 |
|
|---|
| 691 | while True:
|
|---|
| 692 | line = rgb.readline()
|
|---|
| 693 | if line == '': break
|
|---|
| 694 | tmp = line.split()
|
|---|
| 695 |
|
|---|
| 696 | if len(tmp) == 4:
|
|---|
| 697 | if tmp[3][:4] == 'gray': continue
|
|---|
| 698 | if tmp[3].lower().find('gray') != -1: continue
|
|---|
| 699 |
|
|---|
| 700 | name = tmp[3][0].upper() + tmp[3][1:]
|
|---|
| 701 | r, g, b = int(tmp[0]), int(tmp[1]), int(tmp[2])
|
|---|
| 702 | colours[name] = '#%2.2x%2.2x%2.2x' % (r, g, b)
|
|---|
