[TriLUG] Web App with Bar Graph - What to Use?
Brian Bell
bbellwfu at gmail.com
Tue Dec 12 12:27:15 EST 2006
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Brian
On 12/12/06, Brian Henning <brian at strutmasters.com> wrote:
>
> Not to be the dissident of the group, but is Perl a requirement?
> Granted it probably does have nice modules already out there for making
> pretty graphs.. But nevertheless, is PHP worth considering for your
> application?
>
> What is the data source for these graphs?
>
> ~B
>
> Josh Vickery wrote:
> > If you want to minimize server requirements, you can make bargraphs
> > using html tables. There is a Perl module to aid in this process
> > called HTML::BarGraph which is written as a single .pm file, so it
> > could be included in your distribution, provided license
> > compatibility.
> >
> > Josh
> >
> > On 12 Dec 2006 08:55:59 -0500, jonc <jonc at nc.rr.com> wrote:
> >>
> >> On Tue, 2006-12-12 at 08:36, Scott Chilcote wrote:
> >> > Hi Folks,
> >> >
> >> > I'd like to rewrite a web application I have that has a user entry
> form
> >> > and generates some bar graphs.
> >> >
> >> > I used Perl and gnuplot to do this the first time. Managing it was a
> >> > chore because the jpeg images that gnuplot generated had to be
> >> stored on
> >> > the server. The program had to keep them available and delete them
> >> > periodically.
> >> >
> >> > I had a few requests to share the app, but these requirements made it
> >> > hard to provide it to someone else.
> >> >
> >> > One option I'm considering is the GD::Graph module for Perl. It
> looks
> >> > like it would do what I need, and wouldn't require managed image
> files.
> >> > It would require that GD::Graph is available on the webserver though.
> >> >
> >> > I'm not opposed to using something else like JavaScript or Python
> >> > instead. I want to minimize setup and administration. The
> application
> >> > may wind up on a club webserver operated by hobbyists.
> >> >
> >> > Any recommendations?
> >> >
> >> > Thanks,
> >> >
> >> > Scott C.
> >>
> >> I use Python for my graphs. It's fairly fast and its as pretty or ugly
> >> as I make it. I like the control of being able to place a pixels
> exactly
> >> where I want it.
> >>
> >> Here is a program segment that draws a graph displaying trunk
> >> utilization...
> >>
> >>
> >> import time
> >> import os
> >> import Image
> >> import ImageDraw
> >> import ImageFont
> >> #
> >> # Make a graph of the monthly usage
> >> # Left border = 40 pixels
> >> # Right border = 40 pixels
> >> # Top border = 20 pixels
> >> # Bottom border = 40 pixels
> >> # Max num of pixels = 2678400 - lets see what that looks like
> >> # Okay - 2880 is a resonable max, though 1440 would be better.
> >> #
> >> # Lets pick the day of the Max and look at that for one graph
> >> # Midnight to Midnight, 86400 seconds = 24 hours
> >> Midnight_tup =
> >>
> ((Max_tup[0],Max_tup[1],Max_tup[2],0,0,0,Max_tup[6],Max_tup[7],Max_tup[8]))
> >>
> >> Midnight_sec = time.mktime(Midnight_tup)
> >> End_sec = Midnight_sec + 86400
> >> # Time will be the x axis: graph offset=40 pixels,
> >> # each pixel=1 minute (60 seconds)
> >> x_offset = 40
> >> x_scale = 0.016666667
> >> # Max calls will be the y axis which is logically inverted
> >> # (goes down rather than up) so we need to subtract off
> >> # values from the offset: graph offset = (507 - 40) = 467
> >> # and each call segment is 3 pixels long
> >> y_offset = 467
> >> y_scale = -3.0
> >>
> >> # Maximum pixels in the x axis = 40 + 1441 +40 = 1521
> >> # Maximum pixels in the y axis = 507
> >> # create image using a light blue background (Red, Green, Blue)
> >> Mode = "RGB"
> >> Size = (1521,507)
> >> BG_Color = (239,239,255)
> >> im = Image.new(Mode, Size, BG_Color)
> >> #
> >> # Lets put in the Axis and Tix marks for hours
> >> # Color = basic black
> >> draw = ImageDraw.Draw(im)
> >> Axis_color = (16,16,16)
> >> draw.line([(38,468),(1482,468)],Axis_color)
> >> draw.line([(38,469),(1482,469)],Axis_color)
> >> draw.line([(38,470),(1482,470)],Axis_color)
> >> #
> >> draw.line([(40,468),(40,120)],Axis_color)
> >> draw.line([(39,468),(39,120)],Axis_color)
> >> draw.line([(38,468),(38,120)],Axis_color)
> >> #
> >> draw.line([(1480,470),(1480,120)],Axis_color)
> >> draw.line([(1481,470),(1481,120)],Axis_color)
> >> draw.line([(1482,470),(1482,120)],Axis_color)
> >> #
> >> for i in range(1,24,1):
> >> draw.line([(39+(i*60), 469),(39+(i*60), 478)],Axis_color)
> >> draw.line([(40+(i*60), 469),(40+(i*60), 478)],Axis_color)
> >> draw.line([(41+(i*60), 469),(41+(i*60), 478)],Axis_color)
> >> # Do the titles as well
> >> draw.text((38+(i*60), 487),str(i),fill=Axis_color)
> >> #
> >> # put a longer Tix mark at noon x= 40 + (12*60)
> >> draw.line([(759, 478),(759, 487)],Axis_color)
> >> draw.line([(760, 478),(760, 487)],Axis_color)
> >> draw.line([(761, 478),(761, 487)],Axis_color)
> >> #
> >> # Draw the PRI lines on the graph (each line represents one PRI of use)
> >> # Color = light yellow
> >> PRI_color = (224,224,32)
> >> draw.line([(41,398),(1479,398)],PRI_color)
> >> draw.line([(41,329),(1479,329)],PRI_color)
> >> draw.line([(41,260),(1479,260)],PRI_color)
> >> draw.line([(41,191),(1479,191)],PRI_color)
> >> draw.line([(41,122),(1479,122)],PRI_color)
> >> #
> >> # Lets put some titles on this graph
> >> # We will use the default font
> >> # Labels for Y-axis (# of PRIs) - in Yellow
> >> draw.text((20,79),"# of",fill=(122,122,16))
> >> draw.text((20,90),"PRIs",fill=(122,122,16))
> >> #
> >> draw.text((30,394),"1",fill=(122,122,16))
> >> draw.text((30,325),"2",fill=(122,122,16))
> >> draw.text((30,256),"3",fill=(122,122,16))
> >> draw.text((30,187),"4",fill=(122,122,16))
> >> draw.text((30,118),"5",fill=(122,122,16))
> >> # Now lets draw some dots on this image
> >> # Dot colors are very dark grey
> >> Dot_color = (16,16,16)
> >>
> >> for i in range(0,len(Trunks)):
> >> Tr_time = Trunks[i][0]
> >> Tr_max = Trunks[i][1]
> >> if ( Tr_time >= Midnight_sec ) and ( Tr_time <= End_sec ):
> >> # Process our Max day
> >> x = int((Tr_time - Midnight_sec)*x_scale) + x_offset
> >> y = int(Tr_max*y_scale) + y_offset
> >> # im.putpixel((x,y),Dot_color)
> >> # im.putpixel((x,y-1),Dot_color)
> >> # im.putpixel((x,y-2),Dot_color)
> >> draw.line([(x,y),(x, 468)],Dot_color)
> >> #
> >> #
> >> im.save("/home/jonc/cdr/trunks/MaxDay.jpg")
> >>
> >> --
> >> TriLUG mailing list :
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> >> TriLUG Organizational FAQ : http://trilug.org/faq/
> >> TriLUG Member Services FAQ : http://members.trilug.org/services_faq/
> >>
>
> --
> ----------------
> Brian A. Henning
> strutmasters.com
> 336.597.2397x238
> ----------------
> --
> TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug
> TriLUG Organizational FAQ : http://trilug.org/faq/
> TriLUG Member Services FAQ : http://members.trilug.org/services_faq/
>
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