Solved

make a drawing applet (paint type program) or where to find an eg

Posted on 2002-04-29
5
151 Views
Last Modified: 2010-03-31
I need to find a site that will show me how to make a drawing applet with several functions, or one already done. At the moment I can only do straight line drawing.
0
Comment
Question by:Matthelene
5 Comments
 
LVL 18

Expert Comment

by:bobbit31
Comment Utility
0
 

Author Comment

by:Matthelene
Comment Utility
Hi bobbit31 and anyone else,

This is the kind of end result that I need, although I wouldnt need the ovalshapes and typing function would be good.

However this is all well and good but I do really need code with commenting in it as this is too hard, on its own to understand. If you know of anything that will teach me how to do this or know of similar code with lots of commenting in it that would be great.

Thanx for your previous response
0
 
LVL 4

Expert Comment

by:delphi3
Comment Utility
Matthelene,
Rather than spend lots of words on something that is not of interest to you can you specify a shape?
Neither do I understand your math background.

So I may be off the mark with this help.

There are shapes already defined in Java that are can be drawn with careful attention to the definition and what the specific shape like a oval creates.  An oval whose height and width are the same value draws a circle.  An oval whose height and width are the not the same value draws an oval in the more general way that it is understood.

Here is a bit of commentary that could lead to your understanding of the circle using the oval. BUT question me after seeing this.

import java.applet.Applet;
import java.awt. * ;


/*
 * Parameters: the x1 coordinate of the upper left corner of the
 * to be drawn,  the y1 coordinate of the upper left corner of the oval
 * to be drawn, the width x2 is the width of the oval to be drawn, the height
 * y2 is the height of the oval to be drawn.
 */
public class ovalExperiment extends Applet {
     
     public void paint(Graphics g) {
         
          // center specified
          int cx = 150;
          int cy = 225 ;
         
          //Creating some steps
          for (int i = 1; i <= 4; i++) {
               int d1 = 30 * i; // for a circle make the multiplier of i the same number
               int d2 = 30 * i; // for an ellipse make the multipliers of i different numbers
               
               // as in   int d1 = 30 *i; int d2 = 20 *i;
               /*
                * getting the upper left of a rectanlgle that is centered about cx and cy
                * on a coordinate system subtract d1 from cx and subtract d2 from cy
                */
               
               int x1 = cx - d1;
               int y1 = cy - d2;
               
               /* This is  2 times d1 units wide and 2 times d2 units high*/
               int x2 = 2 * d1;
               int y2 = 2 * d2;
               
               /*make it a random color for accent or specify one color*/
               
               Color rndm = new Color((int)(Math.random() * 255),(int)(Math.random() * 255),(int)(Math.random() * 255));
               
               // or use g.setColor(Color.red);
               
               g.setColor(rndm);
               g.drawOval(x1,y1,x2,y2);
          }
     }
}
 

Delphi3



0
 
LVL 9

Expert Comment

by:Venci75
Comment Utility
No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:
PAQ'd and pts refunded
Please leave any comments here within the next seven days.
 
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
 
Venci75
EE Cleanup Volunteer
0
 

Accepted Solution

by:
SpideyMod earned 0 total points
Comment Utility
per recommendation

SpideyMod
Community Support Moderator @Experts Exchange
0

Featured Post

Highfive + Dolby Voice = No More Audio Complaints!

Poor audio quality is one of the top reasons people don’t use video conferencing. Get the crispest, clearest audio powered by Dolby Voice in every meeting. Highfive and Dolby Voice deliver the best video conferencing and audio experience for every meeting and every room.

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
powerN  challenge 3 46
best (free) software to access postgres db (java) 1 17
JAVA part two 5 39
recursion example 16 65
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…

728 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now