Re: [Matplotlib-users] URLs embedded in PNG or JPEG

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For the benefit of the list, below is a working script that makes a
simple plot with a patch element, outputs the plot to a png, and
outputs an html file that contains an image map so that the patch
element is clickable.

Thanks for all the help,

Julius

#!/usr/bin/env python

from pylab import *

dots =3D 150
fig =3D figure(num=3D1,figsize=3D(6,4),dpi=3Ddots,facecolor=3D'w')
ax =3D fig.add_subplot(111)
pl =3D ax.plot(range(0,10),range(0,10),'b-')
box =3D ax.axvspan(3,6,fc=3D'm',alpha=3D0.5)

fig.savefig('test.png',dpi=3Ddots)

img_height =3D fig.get_figheight() * dots

b_verts =3D box.get_verts()

#image maps use left-x,left-y,right-x,right-y
verts =3D [(b_verts[1][0],b_verts[1][1]),(b_verts[3][0],b_verts[3][1])]

tverts =3D box.get_transform().seq_xy_tups(verts)

#image maps have y=3D0 on top
tverts =3D (tverts[0][0],img_height-tverts[0][1],tverts[1][0],img_height-tv=
erts[1][1])

file =3D open('test.html','w')
file.write('''<HTML>
<HEAD>
  <TITLE>Image Map Test</TITLE>
</HEAD>
<BODY>
<map name=3D"map">
  <area shape=3D"rect" coords=3D"%d,%d,%d,%d" href=3D"http://www.google.com=
">
</map>
<img border=3D2 src=3D"./test.png" usemap=3D"#map">
</BODY>
</HTML> ''' % tverts )

file.close()