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 = int(interval / 1000)
        unit = 'km'
    else: 
        interval = int(interval)
        unit = 'm'

    return interval, unit

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

    return -1, ''

1	frank	853	# 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	frank	861	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	frank	853
19	frank	861	if interval / 1000 > 1:
20			interval = int(interval / 1000)
21			unit = 'km'
22			else:
23			interval = int(interval)
24			unit = 'm'
25	frank	853
26	frank	861	return interval, unit
27	frank	853
28	frank	861	def roundInterval(d):
29			"""Round float."""
30			if d<.001:
31			interval = int(d*10000)/10000.0
32			return interval, "%.4f" % interval
33			if d<.01:
34			interval = int(d*1000)/1000.0
35			return interval, "%.3f" % interval
36			if d<.1:
37			interval = int(d*100)/100.0
38			return interval, "%.2f" % interval
39			if d<1:
40			interval = int(d*10)/10.0
41			return interval, "%.1f" % interval
42			if d<10:
43			return int(d), "%d" % d
44			if d<100:
45			interval = int(d/10) * 10
46			return interval, "%d" % interval
47			if d<1000:
48			interval = int(d/100) * 100
49			return interval, "%d" % interval
50			if d<10000:
51			interval = int(d/1000) * 1000
52			return interval, "%d" % interval
53			if d<100000:
54			interval = int(d/10000) * 10000
55			return interval, "%d" % interval
56	frank	853
57	frank	861	return -1, ''
58	frank	853
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