Re: Help Cross-Platform application - C / C++ / MFC Discussion Boards

vikas amin4-Dec-05 20:35

4-Dec-05 20:35

I wanted to have some simple
projects for Cross-Platform application
development
its good if in QT library.

Do any one has idea about the cross -platform
development wich is more suitable and realiable,
I feel QT is good one

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: Help Cross-Platform application

ThatsAlok4-Dec-05 21:20

ThatsAlok

4-Dec-05 21:20

vikas amin wrote:
I wanted to have some simple
projects for Cross-Platform application
development
its good if in QT library.

What type of project are you making ?... if it gui based project you can use wxWidgets[^]!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Help Cross-Platform application

vikas amin4-Dec-05 21:51

vikas amin

4-Dec-05 21:51

Hi alok I have gone down the link u said ,
wxWdiget is a good library .
I had got some news that few good s/w companies
like SAS have choosen QT to develope cross-platfrom
application.
I have to develope application for embeded device,
have to use sockets, serial port,database,GUI ,

My concern is that perfomance of the application
as it was stated that QT.4 is better then MFC ?
Do u have any idea about this
let me know
thank u

Cool | :cool:

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: Help Cross-Platform application

ThatsAlok4-Dec-05 22:28

ThatsAlok

4-Dec-05 22:28

vikas amin wrote:
as it was stated that QT.4 is better then MFC ?

Now and then we hear that this library is Better then MFC, that library is better then MFC... that might be true.. As they providing Cross Platform application development.. that MFC doesn't support..

So if you targeting cross development.. MFC is not suitable for that so there are no issues of Performance etc.

Or If you want to compare WxWidgets and QT ? Better ask Priyank Bolia.(Author of that article, which I referred in previous post).. he surly help you!.. or wait for other people to respond to your query

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Help Cross-Platform application

vikas amin4-Dec-05 23:39

vikas amin

4-Dec-05 23:39

Thank you Alok
i have ask few of my friends woking on Linux
to test the QT free verson ,might be i get the
Linux feed back from them & as far as windows
is concern i will test it
thanks
again

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: Help Cross-Platform application

ThatsAlok5-Dec-05 0:32

ThatsAlok

5-Dec-05 0:32

vikas amin wrote:
Thank you Alok

I believe Suitable candidate for above Thanks is Priyank Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Help Cross-Platform application

Priyank Bolia4-Dec-05 23:08

Priyank Bolia

4-Dec-05 23:08

First of all wxWidgets is not MFC, nor it resembles to MFC. It had many ways of programming, like Message Maps as used in MFC for windows people and connect calls as used in Linux. wxWidgets is much better design than MFC, its very easy to use (like all event handler have a void return type, as compared to MFC where each function has its own way of defination). It is supported on WinCE also and support all the sockets, serial port,database,GUI. It use true native controls as compared to QT interpolation (simulation), so its fast. Its free, whereas QT is commercial. The support for wxWidgets is nice, as lots of open source application used wxWidgets rather than Qt (~3300$ per developer). Qt is copyright, you can't change the API for your personal modification, or bug fixes.

QT and wxWidgets on wxWidgets site
http://wiki.wxwidgets.org/wiki.pl?WxWidgets_Compared_To_Other_Toolkits

QT and wxWidgets on Qt site:
http://lists.trolltech.com/qt-interest/1999-05/thread00027-0.html

http://www.priyank.in/

Re: Help Cross-Platform application

Priyank Bolia4-Dec-05 23:17

Priyank Bolia

4-Dec-05 23:17

I just want to add that starting with wxWidgets is much easier now for VC++.NET 2003 developers, as there is a installer from upcase that install and compiles the wxWidgets automatically and installs the help file integration with Visual Studio. Also there is a class wizard also availble written by myself for wxWidgets on Visual Studio.NET

http://wxforum.shadonet.com/viewforum.php?f=10&sid=e0451a062a958683f3503a473a85d9f3

http://www.priyank.in/

Re: Help Cross-Platform application

vikas amin5-Dec-05 1:26

vikas amin

5-Dec-05 1:26

I have gone throught the websites given by u
fist of all thanks for it,
It obiviously a matter that QT is not free but
if i consifer Quality the topmost in my application
so dont matter to pay some money , if i am geting
a stabe and more relaible components .
Yet will have to do some study for comparison between
QT and wxWidget .
Get back to u with proper feedbacks.
Thank u
Cool | :cool:

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

How to delete values and header from ListCtrl

snprani4-Dec-05 20:22

snprani

4-Dec-05 20:22

Hi
How to delete all column headings and values from CListCtrl. I am doing in this way.

int nColumnCount = m_ListCtrl.GetHeaderCtrl()->GetItemCount();
// Delete all of the columns.
m_ListCtrl.DeleteAllItems();
for (int i=0;i < nColumnCount;i++)
{
m_ListCtrl.DeleteColumn(i);
}

Is it correct or not. when i again displaying values in this listcontrol it is not deleting column names but deleting values. what should i do.

Thanks in advance.

Re: How to delete values and header from ListCtrl

Gavin Taylor4-Dec-05 21:37

Gavin Taylor

4-Dec-05 21:37

Try :

int nColumnCount = m_ListCtrl.GetHeaderCtrl()->GetItemCount();
// Delete all of the columns.
m_ListCtrl.DeleteAllItems();
for (int i=0;i < nColumnCount;i++)
{
m_ListCtrl.DeleteColumn( 0 );
}

When you call DeleteColumn the header control is reindexing the columns everytime so always delete index 0 and you'll be ok.

Gavin Taylor
w: http://www.gavspace.com

Re: How to delete values and header from ListCtrl

Branislav4-Dec-05 22:08

Branislav

4-Dec-05 22:08

int nColumnCount = m_ListCtrl.GetHeaderCtrl()->GetItemCount();
// Delete all of the columns.
m_ListCtrl.DeleteAllItems();
for (int i=0;i < nColumnCount;i++)
{
m_ListCtrl.DeleteColumn(0); // always delete first column
}

You delete all items with m_ListCtrl.DeleteAllItems() and only first column.

VC++

felix_19824-Dec-05 19:51

felix_1982

4-Dec-05 19:51

Hai,
actually i'm new to VC++,working as software developer in VB
i've an embedded program like this
subDVR378max187 (Accum%)
On Error Resume Next
Dim Q%
Accum% = 0
out 888, 1
out 888, 0
Q% = vbInp(189)
out 888, 2
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = 2048
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 1024
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 512
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 256
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 128
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 64
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 32
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 16
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 8
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 4
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 2
out 888, 0
out 888, 2
If (Inp(889) And 32) > 0 Then Accum% = Accum% + 1
out 888, 2
out 888, 0

out 888, 2
out 888, 0
out 888, 1
end sub
this is a basic language routine for collecting 16 bit data when ADC connected through parallel port.what i need is how can i convert this program as a VC++ Dll? how can i link with vb6.0? plz help me soon friends,this is the only remaining thing is this project.

felix

Re: VC++

vikas amin4-Dec-05 20:43

vikas amin

4-Dec-05 20:43

I dont understand what u want to do ,
1> creating dll u need to go through simple exmples on code project for dll in
vc++
2> My experince say that if u r suppose to do OUT and IN port program then it
will confilict in versons of Windows .As 98 support but NT dont support XP
also dont support the use of key word OUT & IN as we use them in simple C.
3> Get the ioport32.dll that will help u get ur work (else i send u )

Cool | :cool:

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Query: Print an Image

Ankush Mehta4-Dec-05 19:27

Ankush Mehta

4-Dec-05 19:27

Hi all,

I have images of different formats.On Selecting any one of these,
1) I want to see the preview of image(possibly in picture box).
2) i want to print the image on the click of button.

Please Guide how can i do that. A short code snippet will be highly appreciated.

Thanks in anticipation!
Regards,

Ankush Mehta

Re: Query: Print an Image

kakan4-Dec-05 22:38

kakan

4-Dec-05 22:38

Hello.

Check out GDI+
There are lots of samples at MSDN.

Kakan

Mr DavidCrow!!

Amol Ravatale4-Dec-05 19:15

Amol Ravatale

4-Dec-05 19:15

I had posted one problem on 1 december 7.48, for which you asked me to attach code.
I have attached the neccessory code in the same problem having date details as 1 december 7.48. Sorry for delay in posting neccessory details.

Regards,
Amol

Toolbar ?

doubt plse4-Dec-05 18:28

doubt plse

4-Dec-05 18:28

hi folks,
I want to Plug new toolbutton into MSN TOOLBAR
how to plug it with 3 rdparty tool ,plse give some suggestions.....

(After signed with microsoft only)

Goodluck

Goodluck

Task Manager - End Process problem

Alan Buchanan4-Dec-05 14:38

Alan Buchanan

4-Dec-05 14:38

I have an application that runs from the Task bar. This app is designed so that it can only be closed using the Task Manager (ie end process).

I have a small problem where the program icon remains in the task bar after I 'End Process'....This can be easily fixed by adding a Shell_NotifyIcon(NIM_DELETE,&IconData) in the destructor.

However, the destructor nor any of the other 'closing functions (Destroy etc) appear to be called when EndProcess using the Task manager is called.

Does anybody have any suggestion on how the Task Manager shuts down a program using End Process so that I can catch a message in order to delete this stray icon

Alan Buchanan

Re: Task Manager - End Process problem

Gavin Taylor4-Dec-05 15:25

Gavin Taylor

4-Dec-05 15:25

Simply put, you cant. Task Manager uses the TerminateProcess[^] API to force a termination, it's usually seen as a last resort method. For more information check out[^].

Gavin Taylor
w: http://www.gavspace.com

Re: Task Manager - End Process problem

Alan Buchanan4-Dec-05 18:03

Alan Buchanan

4-Dec-05 18:03

I can understand the reasoning behind this but would have thought that my destructors would still be called. How does 'End Process' clean up all my pointers that I create ?

I am still left with this irritating problem of the my program icon remaining in the system tray....A 'mouse over and it disappears. Is there any way to get rid of this ? I assume that it is some bug within Windows as I have seen it happen on other programs occasionally.

Thanks

Alan Buchanan

Re: Task Manager - End Process problem

Gavin Taylor4-Dec-05 20:20

Gavin Taylor

4-Dec-05 20:20

The point of TerminateProcess is that it doesn't execute any more code, it's designed as a last resort - ie, the process has stopped responding - not really for every day use to close your program. As far as windows cleaning up after itself, I know it does but don't ask me what type of magic it uses to do it. Smile | :)

Alan Buchanan wrote:
I assume that it is some bug within Windows

Why's it a bug because your program isn't cleaning up after itself properly? The system tray doesn't automatically know when your program has closed so it cant remove the icon until the next time it tries to access it.

Why's it so important you cant provide a proper exit option in your app? Confused | :confused:

Gavin Taylor
w: http://www.gavspace.com

Re: Task Manager - End Process problem

Alan Buchanan4-Dec-05 20:58

Alan Buchanan

4-Dec-05 20:58

Thanks Gavin,

The program is installed at about 15 sites and the intention is for the program to run at all times. Its starts when the user logs on. In order to make it 'idiot-proof' I decided not to have an easy way to terminate the program (ie use Task Manager).

Its not really a bug but an irritation that I have noticed when I debug in the compiler more than from Task manager..The destructors aren't called when I close using the debugger either so I was curious to understand what was going on.

Anyway thanks for your help. I understand what is going on (I think) and have a solution if required (ie add an exit button.

Regards,

Alan Buchanan

FingerPrint

PaulNeyman4-Dec-05 10:24

PaulNeyman

4-Dec-05 10:24

Hallo.
Help me please.
I'd like to write a toolkit that would allow to work with fingerprint device. Such functions as getting the finger image from the device, matching with other, save in database atc.

I have a device and driver for it.

Maybe you can give some tips what to do for achieving this.
I've disassembled the driver's "*.dll"s and found functions that might be necessary, but I don't know how to work with them...

Paul Neyman
paulneyman@list.ru

Re: FingerPrint

Priyank Bolia4-Dec-05 23:26

Priyank Bolia

4-Dec-05 23:26

Its very hard to tell form here, what you need. Bascially most devices comes with there own SDK, and sample programs on how to use it. You should look at the manual of your device or ask the company to help writing programs with their device.

http://www.priyank.in/

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