C / C++ / MFC Discussion Boards

Differencies in dataplot between GDI and GDI+ while drawing the same coordinates

JS5-Dec-07 8:04

5-Dec-07 8:04

In a bigger project I found a strange behavior between GDI and GDI+. Drawing some lines with the same coordinates the GDI+ -lines where drawn a little bit lower than the GDI-lines. You can see this after a big zoom (5000 x), see OnInitialUpdate().
I created a MFC-C++ project with a single ScrollView to check this.

If you want to check my project or you have an answer, please send me a mail to

Johannes.Swida@t-online.de

thanks

Code:
void CgdiPlusTestView::OnDraw(CDC* pDC)
{
CgdiPlusTestDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if (!pDoc)
return;

// draw some lines and a rectangle with alfa-components

SolidBrush cBrush(Color(128, 192, 192, 192));
Pen cPen(Color(255,255, 0, 0),1);
int ii,i;
Point cP[5];
HDC hdc=pDC->m_hDC;

// GDI+
Graphics graphics(hdc);
ii=graphics.SetPageUnit(UnitDisplay);
cP[0].X=295250; cP[0].Y=-506212;
cP[1].X=506559; cP[1].Y=-53058;
cP[2].X=493441; cP[2].Y=-46941;
cP[3].X=282132; cP[3].Y=-500095;
cP[4]=cP[0];
// GDI+ lines and rectangle are together
ii=graphics.FillPolygon(&cBrush,cP,4,FillModeAlternate);
for(i=1;i<5;i++) ii=graphics.DrawLine(&cPen,cP[i-1].X,cP[i-1].Y,cP[i].X,cP[i].Y);

// GDI lines are moved ???
for(i=1;i<5;i++) {
pDC->MoveTo( (int)cP[i-1].X, (int)cP[i-1].Y);
pDC->LineTo( (int)cP[i ].X, (int)cP[i ].Y);
}
}

void CgdiPlusTestView::OnInitialUpdate()
{
CScrollView::OnInitialUpdate();
CSize sizeTotal;
// TODO: Gesamte Größe dieser Ansicht berechnen
sizeTotal.cx = 1485000;
sizeTotal.cy = 1050000;
SetScrollSizes(MM_HIMETRIC, sizeTotal);
}

VC 2008 compiler errors [modified] - SOLVED

Jim Crafton5-Dec-07 5:57

Jim Crafton

5-Dec-07 5:57

I'm trying to compile some code that uses _vsnprintf, and I'm getting errors from the compiler about :

1>regerror.c
1>c:\program files\microsoft visual studio 9.0\vc\include\stdio.h(358) : error C3163: '_vsnprintf': 
attributes inconsistent with previous declaration
1>        c:\program files\microsoft visual studio 9.0\vc\include\stdio.h(350) : 
see declaration of '_vsnprintf'

I have _CRT_SECURE_NO_DEPRECATE, _SCL_SECURE_NO_DEPRECATE, and _CRT_NON_CONFORMING_SWPRINTFS defined.

The code uses it like so:

va_init_list(args, (char* )fmt);
n = vsnprintf((char* )buf, bufsize, (char* )fmt, args);
va_end(args);

where "vsnprintf" is actually a macro defined as :

#define vsnprintf   _vsnprintf

To the best of my knowledge this has worked fine with *all* previous compilers MS C++ compilers, so I'm stumped at what to do here.

Bah!! Turns out there is now a vsnprintf function, so it's a non-issue - I just needed to comment the #define out for VC9 compilers.

¡El diablo está en mis pantalones! ¡Mire, mire!

Real Mentats use only 100% pure, unfooled around with Sapho Juice(tm)!

SELECT * FROM User WHERE Clue > 0
0 rows returned

Save an Orange - Use the VCF!
VCF Blog

modified on Wednesday, December 05, 2007 11:33:23 AM

Re: VC 2008 compiler errors [modified] - SOLVED

toxcct5-Dec-07 6:59

toxcct

5-Dec-07 6:59

Jim, how have you solved it ?
what was the problem actually ?

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

backup network files - problem

sgeocla5-Dec-07 4:58

sgeocla

5-Dec-07 4:58

I am developing an application that is trying to backup (BackupRead, BackupWrite) a file from the network. The process has SE_RESTORE_NAME and SE_BACKUP_NAME privileges set. Creating the backup file is successful but I'm having problems restoring it. When I try to use GetFileAttributes on the folder in whitch I'm trying to restore the file, it fails and GetLastError returns ERROR_INTERNAL_ERROR (1359) for a network share with full access to everyone and returns ERROR_PATH_NOT_FOUND (3) if the share is mounted as a mapped drive. I also cannot create files from my program, but I can create them in windows explorer.
Are there more privileges that I need to set? Am I doing something wrong?
Please help

How do I load another programs Icon?

RichardS715-Dec-07 3:23

RichardS71

5-Dec-07 3:23

Hi All,

What I'm trying to do is implement in c++ a routine that loads another programs icon without loading that program. What api does windows explorer use to do it?

Any help would be greatly appreciated

Regards

RichardS71

Re: How do I load another programs Icon?

David Crow5-Dec-07 3:27

David Crow

5-Dec-07 3:27

Have you considered ExtractIcon()?

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: How do I load another programs Icon?

Iain Clarke, Warrior Programmer5-Dec-07 4:36

Iain Clarke, Warrior Programmer

5-Dec-07 4:36

Grr - I knew there had to be a simple function.

not LoadIcon, not ExtractResource...

I started thinking about LoadLibrary, FindResource etc...

Then I sae you'd already replied with the perfect answer.

Sometimes "we" can be too clever for our own good.

Iain.

Re: How do I load another programs Icon?

RichardS715-Dec-07 5:43

RichardS71

5-Dec-07 5:43

I haven't tried it yet but I've looked at the api and I believe it to be what I was looking for.
I've been Googling all kinds of search criteria looking for this answer.... so many thanks for your help.

Regards

RichardS71 Smile | :)

CInternetSession Problem

Amar Sutar5-Dec-07 2:15

Amar Sutar

5-Dec-07 2:15

Hi,

I am writing an appliction which downloads MJPEG stream from IP camera. My application supports many IP cameras at a time. So i need to download several URL at a time from single instance. But the problem is when I add my fifth camera my application gets hanged. So is there any limit on how many URLs we can open using CInternetSession's OpenURL method? From my application I am able to open upto 4 URLs for one instance. For fifth URL my application give "timeout" exception.

Code:

CStdioFile* m_pFile[5];
CInternetSession m_inetSession[5];

for(int iIndex = 0; iIndex < 5; ++iIndex)
{
m_pFile[iIndex] = m_inetSession[iIndex].OpenURL (cstrUrl, 1, INTERNET_FLAG_TRANSFER_BINARY | INTERNET_FLAG_RELOAD);
.
.
}

Thanks in Advance.

Amar Smile | :)

Re: CInternetSession Problem

David Crow5-Dec-07 3:30

David Crow

5-Dec-07 3:30

Since CInternetSession class is a wrapper around InternetOpenUrl(), you could temporarily change your code to use InternetOpenUrl() instead. When/if it fails, you can call GetLastError() to find out why.

Re: CInternetSession Problem

Amar Sutar5-Dec-07 18:22

Amar Sutar

5-Dec-07 18:22

GetLastError() returns error code 12002.

Re: CInternetSession Problem

Mark Salsbery6-Dec-07 4:31

Mark Salsbery

6-Dec-07 4:31

From the docs:

ERROR_INTERNET_TIMEOUT
12002
The request has timed out.

Are you sure the URL is valid?

Mark

Mark Salsbery
Microsoft MVP - Visual C++

Java | [Coffee]

Re: CInternetSession Problem

Amar Sutar6-Dec-07 5:15

Amar Sutar

6-Dec-07 5:15

Yes it is a Valid URL.

Struct or class?

George_George5-Dec-07 1:50

George_George

5-Dec-07 1:50

Hello everyone,

Multiplies is a struct, why MSDN said it is a class?

http://msdn2.microsoft.com/en-us/library/a5hwk3ay(VS.80).aspx

thanks in advance,
George

Re: Struct or class?

CPallini5-Dec-07 2:08

CPallini

5-Dec-07 2:08

Because in C++ a struct and a class are quite similar. The difference is that structs give, by default, public public access to their members, while classes do the opposite (private access, by default, to their members).
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: Struct or class?

toxcct5-Dec-07 3:25

toxcct

5-Dec-07 3:25

learn your school lessons. in C++, a struct is a class (the only difference is that is defaults is members as public instead of private).

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: Struct or class?

followait5-Dec-07 17:05

followait

5-Dec-07 17:05

C++ recommands that use class only for its spirit.
struct in C++ is for compatibility with C.
However you can think class as a mentally concept, as a more common concpet, so either can be called a class as you like.

How to add a ComboBox to Browseinfo?

moye25015-Dec-07 1:11

moye2501

5-Dec-07 1:11

I want to custom a Browseinfo window.
For original Browseinfo only gets the address information, I also want to know which form user choose(xsl,xml,txt,ect) now.
So, I want to add a ComboBox on the Browseinfo window.

I tried, but always encountered error when I calculate the ComboBox's location.

Does anyone have a relative Demo ? (a simple one is better Poke tongue | ;-P

)
And welcome any idea.
Thanks a lot!

------------------------------------------------------
zhangyuan0526@gmail.com(gtalk and mail,recommend)
alex_robin_526@hotmail.com(msn)

modified on Thursday, December 06, 2007 12:17:18 AM

Re: How to add a ComboBox to Browseinfo?

David Crow15-Jan-08 4:09

David Crow

15-Jan-08 4:09

moye2501 wrote:
I tried, but always encountered error...

What error?

how to add check boxes in multiple colums of a list ctrl

Member 38696825-Dec-07 0:35

Member 3869682

5-Dec-07 0:35

hi all,
i am developing a application using vc++ 6.0 in which i have add check boxes in multiple columns(in 5 columns)of a list ctrl. existing extended style option provides check boxes only in the 0th column. how can i do this... can some one help me out to do this...

Re: how to add check boxes in multiple colums of a list ctrl

followait5-Dec-07 1:29

followait

5-Dec-07 1:29

exchange columns

Re: how to add check boxes in multiple colums of a list ctrl

Member 38696825-Dec-07 1:51

Member 3869682

5-Dec-07 1:51

oh.. but is it possible to get the check boxes in five columns...? did any one try this....

Re: how to add check boxes in multiple colums of a list ctrl

followait5-Dec-07 17:19

followait

5-Dec-07 17:19

enough

http://www.codeproject.com/KB/combobox/#Combo%20&%20List%20Boxes%20-%20ComboBox%20Controls[^]

Re: how to add check boxes in multiple colums of a list ctrl

David Crow5-Dec-07 3:35

David Crow

5-Dec-07 3:35

Member 3869682 wrote:
how can i do this

Use XListCtrl from Hans Dietrich.

trace error

keyto5-Dec-07 0:17

keyto

5-Dec-07 0:17

When i call the CDialog::OnOK(); function I get error :
C:\Documents and Settings\Administrator\Desktop\new_pdf_latest\pdf_latest\itagane_latest\itagane_latest\itagane\CTools\daishi.cpp(116) : error C2039: 'OnOK' : is not a member of 'CDialog'

How can I solve this error?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.