Solved

Multi-Monitor + CLX

Posted on 2003-12-01
7
373 Views
Last Modified: 2010-04-05
I know that CLX does not include multi-monitor support (yet!), but can someone point me to a practical work around?

I'm developing a cross-platform CLX application, and on Windows many users will have dual display's (but probably not on Linux). I'd like be  sure dialog boxes, about screens, splash screen etc position Desktop or Screen Center properlly.

[poScreenCenter and poDesktopCenter don't work correctly in CLX apps, as noted in the Help files]

Thanks
0
Comment
Question by:rwired
7 Comments
 
LVL 8

Expert Comment

by:gmayo
ID: 9857481
It may depend on the graphics card used to do multi display (or the drivers for them) (this is Windows, not Linux). For example, the Matrox cards (G200 and G400?) we use don't display correctly using the DefaultMonitor property, and return the entire width/height of the desktop (eg 2048x768 for a 2-screen display). However, Colorgraphics cards return the width of each monitor seperately and *do* display the DefaultMonitor option correctly. According to Colorgraphic, the way they do it is correct according to MS standards (but they would say that).

One problem with Matrox is that even-numbered screens (eg 2x2) cause the dialog boxes to appear on the border between the left/right monitors and the top/bottom monitors. You could always initialise the dialog to appear on the primary screen, which is normally top-left, by using fixed left/top positions for the form (Position=Designed).

I know that's not much help, just pointing out the problems we've already had.

Geoff M.
0
 

Author Comment

by:rwired
ID: 9873168
Thanks,

I feared it was specific to video drivers.

Still, I'd be interested in finding a nice clean workaround, which will work for a CLX app. Maybe I could use a compiler directive or similar to make a suitable API call to find out the true monitor dimensions/count etc.,  then override TScreen with a modified object with my own property value. I really don't know.
Any help will be much appreciated.

0
 
LVL 2

Expert Comment

by:odissey1
ID: 9885519
Hi all,

I have same problem in Win2k. From all spoken above it seems that on Windows platform there should be no problem to ShowModal a form positioned in the center of the Desktop. Yet, all my ShowModal calls result in a window in-between the monitors. I tried all settings in Form2.DefaultMonitor - no success. Any ideas?

Sincerely,
odissey1
env D7, Win2k, ATI graphic adapter
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.

 
LVL 1

Expert Comment

by:NFX1
ID: 10231332
Always use poScreenCenter
0
 
LVL 2

Expert Comment

by:odissey1
ID: 10259133
To NFX1,

thank you for tip.

odissey1
0
 

Accepted Solution

by:
modulo earned 0 total points
ID: 13056296
PAQed with points refunded (300)

modulo
Community Support Moderator
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

The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
Video by: Mark
This lesson goes over how to construct ordered and unordered lists and how to create hyperlinks.

863 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

20 Experts available now in Live!

Get 1:1 Help Now