Re: Where to start/end (Charts)
From: Mike B (mrcics2000-news-nomail_at_nomail.yahoo.com)
Date: 11/30/04
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Date: Tue, 30 Nov 2004 02:49:45 -0600
JS <dsa.@asdf.com> wrote:
> I have tried to look in the sorce code for the JFreeChart charts to
> see if I could find some help in making a chart. But I would like to
> get some of the basics right on charts first.
>
> My plan is to make the graph:
>
> http://www.cis.ksu.edu/~schmidt/CIS200/gifV6html/Ch5/bargraph.gif
>
> 1) My first idea is to make the class:
>
> class BarGraphWriter extends JPanel
>
> 2) The constructor method:
>
> public BarGraphWriter( )
>
> I will use to make the frame where the graph is displayed.
>
> 3) Then I guess I need:
>
> public void paintComponent(Graphics g)
>
> as its my "pen" I write the info with
>
> 4) public void setAxes(int x_pos, int y_pos, String top_label, int
> y_height)
>
> Is a method I need for defining the axes in the frame.
>
> 5)public void setBar1 - setBar6 (String label1-6, int height1-6,
> Color c1-6)
>
> Is methods for each bar
>
>
> 6) In the end I will need:
>
> class TestGraph
> { public static void main(String[] a)
>
> where I enter different values for testing the graph.
>
> Does this seem reasonable or should one start in another way?
>
What happens if you have 5 or 7 bars? Looks to me like you may need to
iterate over the bars rather than statically definining how many bars you
will have.
-- Mike B
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