Incrementally Paint Picturebox

Question

2.00/5 (1 vote)

See more:

I have array of X,Y points that describe the motion of a 2 pendulum harmonograph. How can Paint the curve incrementally so that it mimics a physical harmonograph drawing with a pen on one pendulum and a table on the other?

Posted 28-Nov-12 3:08am

patch.wheatley

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2012-11-28T05:32:00

Solution 1

Makes no sense. You don't need PictureBox at all. Please see my past answers. You will find clear idea on what you can do:
How do I clear a panel from old drawing[^],
draw a rectangle in C#[^],
Append a picture within picturebox[^];
Drawing Lines between mdi child forms[^],
capture the drawing on a panel[^],
What kind of playful method is Paint? (DataGridViewImageCell.Paint(...))[^].

This should be enough to get an idea on what to do. If not — your follow-up questions are welcome.

—SA

Posted 28-Nov-12 5:32am

Sergey Alexandrovich Kryukov

Comments

Sergey Alexandrovich Kryukov 11-Mar-13 13:41pm

[OP commented:]

Sergey
I have looked at your ideas but am too much of a novice to understand very much
I will recap. I have an array of points, graphicEnd, already scaled to fit in my PictureBox.

with this code in Sub PictureBox_Paint

pathrapid.AddLines(graphicEnd)
e.Graphics.DrawPath(penrapid, pathrapid)

all the lines are drawn at once.

What I want is for the lines to be drawn incrementally - in real time. I have tried this code

For n = LBound(graphicEnd) To UBound(graphicEnd) - 1
pathrapid.AddLine(graphicEnd(n).X, graphicEnd(n).Y, graphicEnd(n + 1).X, graphicEnd(n + 1).Y)
pathrapid.AddLines(graphicEnd)
e.Graphics.DrawPath(penrapid, pathrapid)
Next

but all the lines display at once. How can I slow the Sub Paint to show the lines
1 then 1& 2 then 1-3 then 1-4 etc.

Patrick

Sergey Alexandrovich Kryukov 11-Mar-13 13:46pm

Patrick,

I did not get notification on your response. You should not post content like that as "solution". You can only get down-votes and abuse reports for that.

What do you mean "at once"? Do you mean you need changes step-by-step? Then this is called "animation". If you need such animation, you need to draw N steps in your rendering method, where N is a parameter (frame number). From a separate thread, update N and do Form.Invoke of some method which just calls Invalidate of the control where you render. It will trigger repainting, and it will be performed up to N steps.
Part of it (explanation of Invalidate) is in my referenced answers...

—SA