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Thread: Graph drawing

  1. #1
    Registered User
    Join Date
    Sep 2007
    Location
    Gujrat,India
    Posts
    10

    Graph drawing

    hi to all frnds
    i want to draw a graph in my mobile by using diff values can anyone help for this application?
    Thnks
    Keyur Tank, B.E.I.T
    Gujrat, India

    Pys-60 1.4.0 with Nokia N-72
    Symbian C++,Python

  2. #2
    Nokia Developer Moderator
    Join Date
    May 2007
    Location
    21.46 N 72.11 E
    Posts
    3,796

    Re: Graph drawing

    I think you havent checked the Wiki yet...

    Here is the code

    Code:
    from __future__ import generators
     
    def arange(start, stop=None, step=None):
        if stop is None:
            stop = float(start)
            start = 0.0
        if step is None:
            step = 1.0
        cur = float(start)
        while cur < stop:
            yield cur
            cur += step
     
    from appuifw import *
    app.body = canvas = Canvas()
    width, height = canvas.size
     
    def axes(xyrange, position=[18, height-11, width-10, 10], formatter=lambda x:x):
        global left, bottom, right, top, min_x, min_y, scale_x, scale_y
        left, bottom, right, top = position
        min_x, max_x, step_x, min_y, max_y, step_y = xyrange
        scale_x = float(right-left)/(max_x-min_x)
        scale_y = float(bottom-top)/(max_y-min_y)
        canvas.clear()
        canvas.rectangle([(left,top), (right+1, bottom+1)], 0)
        for x in arange(min_x, max_x, step_x):
            canvas.text((14+scale_x*(x-min_x), height-1), unicode(formatter(x)))
            canvas.point((left+scale_x*(x-min_x), bottom-1), 0)
            canvas.point((left+scale_x*(x-min_x), top+1), 0)
        for y in arange(min_y, max_y, step_y):
            canvas.text((2, bottom+2-scale_y*(y-min_y)), unicode(formatter(y)))
            canvas.point((left+1, bottom-scale_y*(y-min_y)), 0)
            canvas.point((right-1, bottom-scale_y*(y-min_y)), 0)
     
    def plot(xs, ys=None):
        if ys==None:
            ys = xs
            xs = range(len(ys))
        last = left+(xs[0]-min_x)*scale_x, bottom-(ys[0]-min_y)*scale_y
        for i in range(1, len(ys)):
            p = left+(xs[i]-min_x)*scale_x, bottom-(ys[i]-min_y)*scale_y
            canvas.line([last, p], 0x00000ff)
            last = p
        canvas.point(last, 0x0000ff)
    
    axes([0,3.1,.5, 1,4.1,.5])
    plot([1,2,3,4])
    The Above code plots a straight line.You can change the 2 commands at ends and get a graph of your choice.

    Hope that helps
    Last edited by croozeus; 2007-09-27 at 17:14.
    Pankaj Nathani
    www.croozeus.com

  3. #3
    Super Contributor
    Join Date
    May 2006
    Location
    Oulu, Finland
    Posts
    622

    Re: Graph drawing

    Hi sam_tank and welcome to the forum

    Check the canvas object on the PyS60 doc. There you'll see all the different objects you can draw on it and their attributes.

    To croozeus. Use the code tag (# button) to post some source code and not QUOTE; it keeps the indents. So please edit your previous post to make the modification that we can read properly your source example.

    LFD
    Devices:
    Nokia E61 3rd Edition - pys60 1.4.0

    Tips and modules:
    http://www.lfdm.net/thesis

  4. #4
    Nokia Developer Moderator
    Join Date
    May 2007
    Location
    21.46 N 72.11 E
    Posts
    3,796

    Re: Graph drawing

    @Lfd

    Sorry Mate i had given a quick reply. I will be careful next time.
    Pankaj Nathani
    www.croozeus.com

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