Draw over desktop without flickering

Question

5.00/5 (1 vote)

See more:

I am working on a mouse gesture recogniser and I am pressing right click and drawing with pencil tool all over my desktop. When I release it the drawing is still there and I need to use InvalidateRect() function to remove it. But it flickers like when you press Refresh.

Is there a way to draw that line somewhere but actually not over the screen so I can delete it without having the flicker effect?
Thank you, Daniel!

Posted 18-May-10 6:24am

xspitfirexx

Updated 18-May-10 6:35am

Moak

v3

Add a Solution

2 solutions

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)

Chris Maunder · Answer 1 · 2010-05-18T15:40:00

Solution 1

Flicker Free Drawing In MFC[^] and maybe also these[^]

Posted 18-May-10 15:40pm

Chris Maunder772.9K

Comments

xspitfirexx 19-May-10 10:15am

yes but this examples show how to draw without flicks, i draw it without flicks but i dont know how to save a context somewhere and then restore it without using InvalidateRect cause that function makes the refresh flicks.

xspitfirexx · Answer 2 · 2010-05-19T06:15:00

I saw some examples about how to draw with double buffering but i can draw normally without flicking, my problem is that i need to create a backup of the context somehow and after i draw something, to restore the old one (without using InvalidateRect which makes the screen flick. My program on right click down starts to draw on the screen over all windows and on mouse up it has to delete all what i drawed without using InvalidateRect (cause that function makes my screen flick).