Solved

Drawing a line outside the paint method

Posted on 2004-09-09
9
271 Views
Last Modified: 2012-05-05
Hey Experts!

Well, I guess the question explains itself....In the paint method you can easily draw a line with the Gaphics object g and the method draw line; however, outisde it, if I want to draw a line I can't  do that because Graphics is an abstract class, and thus I cannot instantiate objects of its type to draw lines. Is there a simple way to draw a line inside a function?
0
Comment
Question by:mte01
  • 3
  • 3
  • 3
9 Comments
 
LVL 24

Expert Comment

by:sciuriware
ID: 12018587
You must not create a Graphics object yourself! paint gives you a reference
to a Graphics object. The object is surely "bigger" that the abstract class,
but the abstract class is just a kind of guarantee that some methods
will be implemented. Why not call another method with such an object as an argument?

;JOOP!
0
 
LVL 3

Author Comment

by:mte01
ID: 12018644
>> Why not call another method with such an object as an argument?

I tried, but I couldn't (you have to instantiate something at some point)...how could you do that??
0
 
LVL 24

Expert Comment

by:sciuriware
ID: 12018720
I wonder what weird programming you are doing.
What would you instantiate more than you got?

;JOOP!
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 86

Assisted Solution

by:CEHJ
CEHJ earned 420 total points
ID: 12018771
>>Is there a simple way to draw a line inside a function?

You can draw a line from anywhere as long as you've got a reference to a Graphics context
0
 
LVL 3

Author Comment

by:mte01
ID: 12018782
I didn't understand your last comment.....anyway let's go back to our main point:

>> Why not call another method with such an object as an argument?

How could you do that? and how could that help in drawing a line inside a user function (which is just all what I want to do)
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 420 total points
ID: 12018808
void foo() {
    component.getGraphics().drawLine(.....);
}
0
 
LVL 24

Expert Comment

by:sciuriware
ID: 12018845
I give up. CEHJ can certainly handle this.

Good night.

;JOOP!
0
 
LVL 3

Author Comment

by:mte01
ID: 12018866
Excellant CEHJ that's all what I wanted!
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12018935
8-)
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

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 …
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
Viewers will learn about the different types of variables in Java and how to declare them. Decide the type of variable desired: Put the keyword corresponding to the type of variable in front of the variable name: Use the equal sign to assign a v…
This theoretical tutorial explains exceptions, reasons for exceptions, different categories of exception and exception hierarchy.

685 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