Where to start/end (Charts)

From: JS (dsa._at_asdf.com)
Date: 11/30/04

  • Next message: Gordon Beaton: "Re: JNI: Passing array of objects from C++ to Java" 
    Date: Tue, 30 Nov 2004 09:10:12 +0100

    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?

    JS

  • Next message: Gordon Beaton: "Re: JNI: Passing array of objects from C++ to Java"

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