Thuban/Model/scalebar.py

# Copyright (c) 2001, 2002 by Intevation GmbH
# Authors:
# Frank Koormann <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

__version__ = "$Revision$"

from Thuban import _

def deriveInterval(width, scale):
    """Calculate scalebar interval and unit which fits width for scale."""
    try:
        interval = width / scale
    except ZeroDivisionError:
        return -1, ''

    if interval / 1000 > 1:
        interval = long(interval / 1000)
        unit = 'km'
    else: 
        interval = long(interval)
        unit = 'm'

    return interval, unit

def roundInterval(d):
    """Round float."""
    if d<.001: 
        interval = long(d*10000)/10000.0
        return interval, "%.4f" % interval
    if d<.01:
        interval = long(d*1000)/1000.0
        return interval, "%.3f" % interval
    if d<.1:
        interval = long(d*100)/100.0
        return interval, "%.2f" % interval
    if d<1:
        interval = long(d*10)/10.0
        return interval, "%.1f" % interval
    if d<10:
        return long(d), "%d" % d
    if d<100:
        interval = long(d/10) * 10
        return interval, "%d" % interval
    if d<1000:
        interval = long(d/100) * 100
        return interval, "%d" % interval
    if d<10000:
        interval = long(d/1000) * 1000
        return interval, "%d" % interval
    if d<100000:
        interval = long(d/10000) * 10000
        return interval, "%d" % interval

    return -1, ''

1	# Copyright (c) 2001, 2002 by Intevation GmbH
2	# Authors:
3	# Frank Koormann <[email protected]>
4	#
5	# This program is free software under the GPL (>=v2)
6	# Read the file COPYING coming with Thuban for details.
7
8	__version__ = "$Revision$"
9
10	from Thuban import _
11
12	def deriveInterval(width, scale):
13	"""Calculate scalebar interval and unit which fits width for scale."""
14	try:
15	interval = width / scale
16	except ZeroDivisionError:
17	return -1, ''
18
19	if interval / 1000 > 1:
20	interval = long(interval / 1000)
21	unit = 'km'
22	else:
23	interval = long(interval)
24	unit = 'm'
25
26	return interval, unit
27
28	def roundInterval(d):
29	"""Round float."""
30	if d<.001:
31	interval = long(d*10000)/10000.0
32	return interval, "%.4f" % interval
33	if d<.01:
34	interval = long(d*1000)/1000.0
35	return interval, "%.3f" % interval
36	if d<.1:
37	interval = long(d*100)/100.0
38	return interval, "%.2f" % interval
39	if d<1:
40	interval = long(d*10)/10.0
41	return interval, "%.1f" % interval
42	if d<10:
43	return long(d), "%d" % d
44	if d<100:
45	interval = long(d/10) * 10
46	return interval, "%d" % interval
47	if d<1000:
48	interval = long(d/100) * 100
49	return interval, "%d" % interval
50	if d<10000:
51	interval = long(d/1000) * 1000
52	return interval, "%d" % interval
53	if d<100000:
54	interval = long(d/10000) * 10000
55	return interval, "%d" % interval
56
57	return -1, ''
58
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svn:keywords	Author Date Id Revision