[2 days left] What’s wrong with your cloud strategy? Learn why multicloud solutions matter with Nimble Storage.Register Now

x
?
Solved

Equivalence between twips and inches or pixels

Posted on 2000-05-13
3
Medium Priority
?
799 Views
Last Modified: 2013-11-20
Hi all..

I have added an ActiveX control to my application.. specifically it is a FlexGrid control. I need to know the height of the row so that I will be able to define the number of rows at run time. The problem is that the FlexGrid RowHeight property returns a value measured in twips, so that I need to convert it into pixels. That way I could use GetClientRect to know how many rows the control need to have when application is initialized.

I use Visual C++ 6.0.

Any advice? suggestion? help?
Thanks a lot in advance

Demarcy
0
Comment
Question by:demarcy
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 2

Accepted Solution

by:
vbk_bgm earned 280 total points
ID: 2807943
Hi,
1440 twips make an inch(=72 points).

To make conversion from pixels to twips,
CClientDC dc(this);
int pixels_per_inchX = dc.GetDeviceCaps(LOGPIXELSX);
int pixels_per_inchY = dc.GetDeviceCaps(LOGPIXELSY);
CRect rect;
GetClientRect(rect);
int client_width_in_twips = rect.Width()*1440/pixels_per_inchX;
int client_height_in_twips = rect.Height()*1440/pixels_per_inchY;

Hope this helps!
0
 

Author Comment

by:demarcy
ID: 2808588
Thanks for your comment...

I saw you used CClientDC... I have used CDC* pDC = GetDC() instead and it worked.. is it right? or should I use CClientDC in that case?

Demarcy
0
 
LVL 2

Expert Comment

by:vbk_bgm
ID: 2809712
You can use either CClientDC or GetDC. If you use GetDC make sure to release the DC using ReleaseDC.
0

Featured Post

Survive A High-Traffic Event with Percona

Your application or website rely on your database to deliver information about products and services to your customers. You can’t afford to have your database lose performance, lose availability or become unresponsive – even for just a few minutes.

Question has a verified solution.

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

Here is how to use MFC's automatic Radio Button handling in your dialog boxes and forms.  Beginner programmers usually start with a OnClick handler for each radio button and that's just not the right way to go.  MFC has a very cool system for handli…
Introduction: Ownerdraw of the grid button.  A singleton class implentation and usage. Continuing from the fifth article about sudoku.   Open the project in visual studio. Go to the class view – CGridButton should be visible as a class.  R…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
Suggested Courses

649 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