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# PyDia imgmap.py : produce an html image map
# Copyright (c) 2007 Hans Breuer <hans@breuer.org>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
import dia, sys, os.path
import gettext
_ = gettext.gettext
class ObjRenderer :
def __init__ (self) :
self.f = None
# the bintmap exporters calculate their ow margins from the bunding box
self.xofs = 0
self.yofs = 0
def begin_render (self, data, filename) :
self.f = open(filename, "w")
bMapLayer = 0 # if there is a special layer containing the links
for layer in data.layers :
if layer.name == "map" :
bMapLayer = 1
break
scale = 20.0 * data.paper.scaling
r = data.extents
width = int((r.right - r.left) * scale)
height = int((r.bottom - r.top) * scale)
name = os.path.split (filename)[1]
fname = name[:name.find(".")] + ".png" # guessing
self.f.write ('<image src="%s" width="%d", height="%d" usemap="#%s">\n' % (fname, width, height, name))
self.f.write ('<map name="%s">\n' % (name,))
self.xofs = - (r.left * scale)
self.yofs = - (r.top * scale)
if bMapLayer :
self.WriteAreas (layer, scale)
else :
for layer in data.layers :
self.WriteAreas (layer, scale)
self.f.write ('</map>\n')
def WriteAreas (self, layer, scale) :
for o in layer.objects :
r = o.bounding_box
if "name" in o.properties :
url = o.properties["name"].value
elif "text" in o.properties :
url = o.properties["text"].value.text
else :
continue
if len(url) == 0 or url.find (" ") >= 0 :
continue
alt = url
if "comment" in o.properties :
alt = o.properties["comment"].value
# need to sale the original coords to the bitmap size
x1 = int(r.left * scale) + self.xofs
y1 = int(r.top * scale) + self.yofs
x2 = int(r.right * scale) + self.xofs
y2 = int(r.bottom * scale) + self.yofs
self.f.write (' <area shape="rect" href="%s" title="%s" alt="%s" coords="%d,%d,%d,%d">\n' % \
("#" + url, url, alt, x1, y1, x2, y2))
def end_render (self) :
self.f.close()
# dia-python keeps a reference to the renderer class and uses it on demand
dia.register_export (_("Imagemap"), "cmap", ObjRenderer())
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