Solved

how do i clear all the shapes i've drawn on a panel using the graphics2d object?

Posted on 2011-02-20
10
547 Views
Last Modified: 2012-05-11
how do i clear all the shapes i've drawn on a panel using the graphics2d object?
0
Comment
Question by:wrynn
10 Comments
 
LVL 47

Expert Comment

by:for_yan
ID: 34940172
You can say clear Rect over the whole compouonent
0
 
LVL 47

Accepted Solution

by:
for_yan earned 333 total points
ID: 34940178
g2d.clearRect(0,0,this.getWidth(), this.getHeight()) should work
0
 
LVL 92

Assisted Solution

by:objects
objects earned 167 total points
ID: 34940229
typically you don't clear. for example each time the paintComponent() method of a JComponent is called the 'canvas' is already blank.
 
0
 
LVL 47

Assisted Solution

by:for_yan
for_yan earned 333 total points
ID: 34940446
I guess in order to claer your component in the class where you have
paint method you set up a boolean value, say,
and then  
you just say

  and in you paint(Graphics g) method first thing
you check this boolean
 and return if it is set:

if(clear)return;

  Then if you need to blank your component, you
just say:

   myPanel.setClear(true);
  repaint();

and it  should clean the panel or canvas for you

 
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 

Author Comment

by:wrynn
ID: 36156857
I figured out that I had to draw a white rectangle over the entire screen at the beginning of my paint method.
0
 
LVL 27

Expert Comment

by:mrcoffee365
ID: 37645653
I've requested that this question be closed as follows:

Accepted answer: 0 points for wrynn's comment #36156857

for the following reason:

This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
0
 
LVL 47

Expert Comment

by:for_yan
ID: 37645654
I think three comments should be considered to be a solution
ID: 34940178 (166 points)
ID: 34940229 (166 points)
ID: 34940446 (166 points)

Any one of these can be considered as an accepted solution, the other two
are assisted solution

The comment by wrynn  ID: 36156857
in fact repeats the solution which was mentioned above
0
 
LVL 27

Expert Comment

by:mrcoffee365
ID: 37646676
Fine with giving points to experts.  The solution used by the asker is not the same as the suggestions by for_yan, hence the original assignment to the asker.  But experts worked at it, so giving points to them is fine.  The first answer from objects is the correct one, but not what the asker used, so hard to say here.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

For customizing the look of your lightweight component and making it look lucid like it was made of glass. Or: how to make your component more Apple-ish ;) This tip assumes your component to be of rectangular shape and completely opaque. (COD…
This was posted to the Netbeans forum a Feb, 2010 and I also sent it to Verisign. Who didn't help much in my struggles to get my application signed. ------------------------- Start The idea here is to target your cell phones with the correct…
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.

910 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

22 Experts available now in Live!

Get 1:1 Help Now