Re: Bargraphs in VC++ 6.0

From:

David Wilkinson <no-reply@effisols.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 16 Jan 2008 14:40:54 -0500

Message-ID:

<uWlf1eHWIHA.2268@TK2MSFTNGP02.phx.gbl>

Kahlua wrote:

Every one of these links you give me are projects full of lots of bell and
whistles which makes it impossible to just find the simple bargraph portion.
I guess it seems nobody here really knows how to do this task simply.
All I want to do is take a simple string of bytes and translate to a simple
bargraph within a defined area of screen.
I have ways that do work but I am told they are troublesome, yet no one
explains how to do it correctly.
When I do it the only way I know works (which is trouble according to lots
of people) it doesnt re-draw when a window overlaps it.
You keep telling me that I need to do something in the OnPaint() routing but
dont say what.
This is NOT a school project or anything.
It is simply something I am trying to learn to do the right way.
Please someone help me.

Kahlua:

For the simplest bar graph, just use CDC::Rectangle() to draw a series
of rectangles of the correct height.

Yes, you must do your painting in OnPaint() or OnDraw() if you want your
window to repaint after being covered. This is how the Windows printing
model works.

--
David Wilkinson
Visual C++ MVP