def get_next_maplet(self, fullpathname, dX, dY):
"""Given a maplet's pathname, get the next or previous one.
Does not currently work for jumps more than 1 in any direction.
Returns pixbuf, newpath (either may be None).
"""
pathname, filename = os.path.split(fullpathname)
if (self.Debug):
print "Generic get_next_maplet", filename, dX, dY
name, ext = os.path.splitext(filename)
# traceback.print_stack()
mapb = int(name[-self.numdigits:])
if self.usedash:
mapa = int(name[-self.numdigits * 2 - 1: -self.numdigits - 1])
else:
mapa = int(name[-self.numdigits * 2: -self.numdigits])
if self.latfirst:
newa = MapUtils.ohstring(mapa + dX, self.numdigits)
newb = MapUtils.ohstring(mapb + dY, self.numdigits)
else:
newa = MapUtils.ohstring(mapa + dY, self.numdigits)
newb = MapUtils.ohstring(mapb + dX, self.numdigits)
if self.usedash:
newname = self.prefix + newa + "-" + newb
else:
newname = self.prefix + newa + newb
newpath = os.path.join(self.location, newname + ext)
if filename is None or not os.access(filename, os.R_OK):
return None, newpath
pixbuf = MapWindow.load_image_from_file(newpath)
return pixbuf, newpath
def coords_to_filename(self, longitude, latitude):
"""Given coordinates in decimal degrees, map to the closest filename"""
if self.left_longitude > longitude or self.top_latitude < latitude:
return None
x_grid = MapUtils.int_trunc((longitude - self.left_longitude) *
self.xscale / self.img_width)
y_grid = MapUtils.int_trunc((self.top_latitude - latitude) *
self.yscale / self.img_height)
if not self.latfirst:
temp = x_grid
x_grid = y_grid
y_grid = temp
retstr = os.path.join(self.location,
self.prefix + MapUtils.ohstring(x_grid,
self.numdigits))
if self.usedash:
retstr = retstr + "-"
retstr = retstr + MapUtils.ohstring(y_grid, self.numdigits) + self.ext
return retstr
def coords_to_filename(self, longitude, latitude):
"""Given a pair of coordinates in deg.mmss, map to the
containing filename, e.g. q37122c2/012t0501.gif.
"""
latDeg = MapUtils.int_trunc(latitude)
longDeg = MapUtils.int_trunc(-longitude)
latMin = (latitude - latDeg) * 60.
longMin = (-longitude - longDeg) * 60.
# The 7.5 here is because of the 7.5 in the directory names above
# (we're getting the offset of this image from the origin of
# the 7.5-series map covered by the directory),
# not the map series we're actually plotting now.
longMinOrd = MapUtils.int_trunc(longMin / 7.5)
latMinOrd = MapUtils.int_trunc(latMin / 7.5)
dirname = "q" + MapUtils.ohstring(latDeg, 2) \
+ MapUtils.ohstring(longDeg, 3) \
+ chr(ord('a') + latMinOrd) + str(longMinOrd + 1)
# Find the difference between our desired coordinates
# and the origin of the map this directory represents.
# The 7.5 here is because of the 7.5 in the directory names above.
latMinDiff = latMin - (latMinOrd * 7.5)
longMinDiff = longMin - (longMinOrd * 7.5)
latOffset = MapUtils.int_trunc(latMinDiff * 10 / self.series)
longOffset = MapUtils.int_trunc(longMinDiff * 10 / self.series)
# Now calculate the current filename.
# Note that series is either 7.5 or 15
if (self.series > 13):
fileprefix = "024t"
numcharts = 5
else:
fileprefix = "012t"
numcharts = 10
filename = fileprefix + MapUtils.ohstring(numcharts - longOffset, 2) \
+ MapUtils.ohstring(numcharts - latOffset, 2) + self.img_ext
return self.location + "/" + dirname + "/" + filename
def coords_to_filename(self, longitude, latitude):
"""Given a pair of coordinates in deg.mmss, map to the
containing filename, e.g. q37122c2/012t0501.gif.
"""
latDeg = MapUtils.int_trunc(latitude)
longDeg = MapUtils.int_trunc(-longitude)
latMin = (latitude - latDeg) * 60.
longMin = (-longitude - longDeg) * 60.
# The 7.5 here is because of the 7.5 in the directory names above
# (we're getting the offset of this image from the origin of
# the 7.5-series map covered by the directory),
# not the map series we're actually plotting now.
longMinOrd = MapUtils.int_trunc(longMin / 7.5)
latMinOrd = MapUtils.int_trunc(latMin / 7.5)
dirname = "q" + MapUtils.ohstring(latDeg, 2) \
+ MapUtils.ohstring(longDeg, 3) \
+ chr(ord('a') + latMinOrd) + str(longMinOrd + 1)
# Find the difference between our desired coordinates
# and the origin of the map this directory represents.
# The 7.5 here is because of the 7.5 in the directory names above.
latMinDiff = latMin - (latMinOrd * 7.5)
longMinDiff = longMin - (longMinOrd * 7.5)
latOffset = MapUtils.int_trunc(latMinDiff * 10 / self.series)
longOffset = MapUtils.int_trunc(longMinDiff * 10 / self.series)
# Now calculate the current filename.
# Note that series is either 7.5 or 15
if (self.series > 13):
fileprefix = "024t"
numcharts = 5
else:
fileprefix = "012t"
numcharts = 10
filename = fileprefix + MapUtils.ohstring(numcharts - longOffset, 2) \
+ MapUtils.ohstring(numcharts - latOffset, 2) + self.img_ext
return self.location + "/" + dirname + "/" + filename
def get_next_maplet(self, fullpathname, dX, dY):
"""Given a maplet's pathname, get the next or previous one.
Does not currently work for jumps more than 1 in any direction.
Returns pixbuf, newpath (either may be None).
"""
if (self.Debug):
print("get_next_maplet:", fullpathname, dX, dY)
pathname, filename = os.path.split(fullpathname)
collecdir, mapdir = os.path.split(pathname)
maplat = int(mapdir[1:3])
maplon = int(mapdir[3:6])
name, ext = os.path.splitext(filename)
xdir = int(mapdir[-1])
ydir = ord(mapdir[-2]) - ord('a') # convert from letter a-h
if self.series == 7.5:
serstr = self.ser7prefix
grid = 10
else:
serstr = self.ser15prefix
grid = 5
x = int(name[-4:-2]) + dX
y = int(name[-2:]) + dY
if x < 1:
x = grid
xdir = xdir + 1
if xdir > 8:
xdir = 1
if self.Debug:
print(mapdir, name, ": wrapping mapdir coordinates -x", end=' ')
print(maplon)
maplon = str(int(maplon) + 1)
if x > grid:
x = 1
xdir = xdir - 1
if xdir < 1:
xdir = 8
if self.Debug:
print(mapdir, name, ": wrapping mapdir coordinates +x", end=' ')
print(maplon)
maplon = str(int(maplon) - 1)
if y > grid:
y = 1
ydir = ydir - 1
if ydir < 0:
ydir = 7
if self.Debug:
print(mapdir, name, ": wrapping mapdir coordinates +y", end=' ')
print(maplat)
maplat = str(int(maplat) - 1)
if y < 1:
y = grid
ydir = ydir + 1
if ydir > 7:
ydir = 0
if self.Debug:
print(mapdir, name, ": wrapping mapdir coordinates -y", end=' ')
print(maplat)
maplat = str(int(maplat) + 1)
# We're ready to piece the filename back together!
newpath = os.path.join(collecdir,
"q" + MapUtils.ohstring(maplat, 2)
+ MapUtils.ohstring(maplon, 3)
+ chr(ydir + ord('a')) + str(xdir),
serstr + MapUtils.ohstring(x, 2)
+ MapUtils.ohstring(y, 2) + ext)
if not os.access(newpath, os.R_OK):
if self.Debug:
print("get_next_maplet(", fullpathname, dX, dY, ")")
print(" Can't open", newpath)
return None, newpath
pixbuf = MapWindow.load_image_from_file(newpath)
return pixbuf, newpath
def get_next_maplet(self, fullpathname, dX, dY):
"""Given a maplet's pathname, get the next or previous one.
Does not currently work for jumps more than 1 in any direction.
Returns pixbuf, newpath (either may be None).
"""
if (self.Debug):
print "get_next_maplet:", fullpathname, dX, dY
pathname, filename = os.path.split(fullpathname)
collecdir, mapdir = os.path.split(pathname)
maplat = int(mapdir[1:3])
maplon = int(mapdir[3:6])
name, ext = os.path.splitext(filename)
xdir = int(mapdir[-1])
ydir = ord(mapdir[-2]) - ord('a') # convert from letter a-h
if self.series == 7.5:
serstr = self.ser7prefix
grid = 10
else:
serstr = self.ser15prefix
grid = 5
x = int(name[-4:-2]) + dX
y = int(name[-2:]) + dY
if x < 1:
x = grid
xdir = xdir + 1
if xdir > 8:
xdir = 1
if self.Debug:
print mapdir, name, ": wrapping mapdir coordinates -x",
print maplon
maplon = str(int(maplon) + 1)
if x > grid:
x = 1
xdir = xdir - 1
if xdir < 1:
xdir = 8
if self.Debug:
print mapdir, name, ": wrapping mapdir coordinates +x",
print maplon
maplon = str(int(maplon) - 1)
if y > grid:
y = 1
ydir = ydir - 1
if ydir < 0:
ydir = 7
if self.Debug:
print mapdir, name, ": wrapping mapdir coordinates +y",
print maplat
maplat = str(int(maplat) - 1)
if y < 1:
y = grid
ydir = ydir + 1
if ydir > 7:
ydir = 0
if self.Debug:
print mapdir, name, ": wrapping mapdir coordinates -y",
print maplat
maplat = str(int(maplat) + 1)
# We're ready to piece the filename back together!
newpath = os.path.join(collecdir,
"q" + MapUtils.ohstring(maplat, 2)
+ MapUtils.ohstring(maplon, 3)
+ chr(ydir + ord('a')) + str(xdir),
serstr + MapUtils.ohstring(x, 2)
+ MapUtils.ohstring(y, 2) + ext)
if not os.access(newpath, os.R_OK):
if self.Debug:
print "get_next_maplet(", fullpathname, dX, dY, ")"
print " Can't open", newpath
return None, newpath
pixbuf = MapWindow.load_image_from_file(newpath)
return pixbuf, newpath
