Re: CFontDialog - C / C++ / MFC Discussion Boards

Re: Image Zoom (Scaling?) with GDI+

Naveen30-Aug-07 3:54

Naveen

30-Aug-07 3:54

TheShihan wrote:
Graphics::FromImage(m_image);

the above function might have returned 0. thats why the graphics->ScaleTransform() is giving exception.

nave

[OpenedFileFinder]

Re: Image Zoom (Scaling?) with GDI+

TheShihan30-Aug-07 4:17

TheShihan

30-Aug-07 4:17

How can I check the returnvalue from this function? I mean I cannot do this:
int = Graphics * graphics = Graphics::FromImage(m_image);

or do you mean NULL? I tryed to check it this way:

if(graphics != NULL) <br />
{<br />
MessageBox("OK")<br />
}<br />
else <br />
{<br />
MessageBox("Not OK")<br />
}

Gave me also errors... sorry I'm really a beginner.

Shi

Re: Image Zoom (Scaling?) with GDI+

Naveen30-Aug-07 4:20

Naveen

30-Aug-07 4:20

TheShihan wrote:
or do you mean NULL?

null and 0 are all the same

TheShihan wrote:
if(graphics != NULL)
{
MessageBox("OK")
}
else
{
MessageBox("Not OK")
}

So which message box u got?

nave

[OpenedFileFinder]

Re: Image Zoom (Scaling?) with GDI+

James R. Twine30-Aug-07 7:07

James R. Twine

30-Aug-07 7:07

TheShihan wrote:
or do you mean NULL?

   Note - some developers get hung up on the fact that NULL, NUL and zero all have the same value, completely ignoring that the meanings may be different depending on context.

   For an extreme example of this mistake, see the "NUL is not NULL...!" post on my profile's page.

   So yes, as far as you are concerned, the poster meant NULL.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

CFontDialog

Try30-Aug-07 3:17

Try

30-Aug-07 3:17

Hi All,
I have created an application in which i can change the font attributes of a text. I am using CFontDialog to select font size, font family etc
Before calling CFontDialog (while debugging)
m_TextFont.m_cf.iPointSize is 140. (Font Size is 14).
But when Font dialog is popped it is showing Font Size as 17.

What may be the problem?

Re: CFontDialog

David Crow30-Aug-07 3:20

David Crow

30-Aug-07 3:20

Care to share a code snippet with us?

"A good athlete is the result of a good and worthy opponent." - David Crow

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

Re: CFontDialog

Jason Teagle30-Aug-07 3:24

Jason Teagle

30-Aug-07 3:24

I would hazard a guess to say that it is to do with how Windows maps fonts. In the LOGFONT structure, for example, it needs a *negative* value to get the full character height - a positive value gives a slightly different size as it doesn't check against the full character cell height.

Now, this doesn't necessarily mean it's true in your case.

I think we are going to need to see some sample code and / or an explanation of what you do as a user with the font dialogue in between examining those values - for example, do you simply cancel it, or do you choose something?

Re: CFontDialog

Try30-Aug-07 3:50

Try

30-Aug-07 3:50

CFontDialog* m_TextFont = new CFontDialog(&lfFontAttr, CF_BOTH | CF_TTONLY | CF_INITTOLOGFONTSTRUCT);

lfFontAttr is LOGFONT structure.

m_TextFont->GetCurrentFont(&lfFontAttr);

Here m_TextFont->m_cf.iPointSize is 140 (i got the value while debugging)

if (m_TextFont->DoModal() == IDOK)
   {
      m_TextFont->GetCurrentFont(&lfFontAttr);
      -------
   }

Font size 17 is shown in dialog.

Re: CFontDialog

Jason Teagle30-Aug-07 10:07

Jason Teagle

30-Aug-07 10:07

My hunch was strangely accurate. If you look at the constructor for CFontDialog in MSDN, it has a sample (reproduced below) that sets a negative value (the pixel height) into lfHeight, not 1/10ths of a point as you have:

// Show the font dialog with 12 point "Times New Roman" as the
// selected font.
LOGFONT lf;
memset(&lf, 0, sizeof(LOGFONT));

CClientDC dc(this);
lf.lfHeight = -MulDiv(12, dc.GetDeviceCaps(LOGPIXELSY), 72);
strcpy(lf.lfFaceName, "Times New Roman");

CFontDialog dlg(&lf);
dlg.DoModal();

I believe this to be the source of the problem.

PocketPC to PC file transfer [modified]

shpid3r30-Aug-07 2:47

shpid3r

30-Aug-07 2:47

Hello to everyone interested!

I am willing to write an application for my Pocket PC which should use the (built in) Bluetooth to 'upload' a .txt or .xml file. If it's possible, I'd like to do that with minimal user intervention on the PC.
Just turn on Bluetooth ports on both devices, select 'upload file' on PPC and the PC to accept it.

If you have any idea about this, any article related to my problem or something to start with, I'd be deeply thankful!
Best wishes!

if someone would like to contact me, here is my email: shpid3r@yahoo.com

Re: PocketPC to PC file transfer

Rajesh R Subramanian30-Aug-07 6:21

Rajesh R Subramanian

30-Aug-07 6:21

This[^] must help you.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->ßRÅhmmÃ<-·´¯`·.

sscanf, reading unknown number of variables

Jim Warburton30-Aug-07 2:18

Jim Warburton

30-Aug-07 2:18

Hi, I am reading in a line from a .dat file using fgets. The line is an unknown number of variables written in scientific notation (4.20000e+00 1.00000e-01 1.177000e+00 0.000000e+00 ...). The first two are an x and y location and will always be there. Due to the number of these lines to read in, minimum is 500000, I don't want to use char/string as each number will take about double the memory of a float. Using sscanf with a large amount of %f I can find the number of variables (there may be up to 30).
int number = sscanf(data_in,"%f%f%f%f%f%f%f%f%f%f%f...",&temp[0],&temp[1],...,&temp[n]);
With number I can create a string with the correct number of '%f' and set the array to the correct length.
At the moment I use a full array of 30 with the correct number of %f. Knowing how many variables there are I can pull only the valid elements from the array.
I am stuck on how to set the number of references '&temp[n]', to match the number of %f in the format string.
Any ideas on how to set everything equal lengths would be greatly appreciated.

Jim

this thing looks like it was written by an epileptic ferret
Dave Kreskowiak

Re: sscanf, reading unknown number of variables

jhwurmbach30-Aug-07 2:40

jhwurmbach

30-Aug-07 2:40

jimwawar wrote:
I am stuck on how to set the number of references '&temp[n]', to match the number of %f in the format string.

How about

std::vector<double> numbers;
std::stringstream str;
str <<< data_in;
for ( unsigned i = 0; i < number_count; ++i) {
  double d;
  str >> d;
  numbers.push_back( d);
}

You will end up with number_count doubles in the vector numbers.
You will need to improve the error checking, and you might want to use iterators here, if you feel fit.

Also, boost::lexical_cast[^] could be used to make this more programmer-friendly.

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

Re: sscanf, reading unknown number of variables

Jim Warburton30-Aug-07 2:50

Jim Warburton

30-Aug-07 2:50

Thanks for the help.

Jim

this thing looks like it was written by an epileptic ferret
Dave Kreskowiak

Re: sscanf, reading unknown number of variables

Nishad S30-Aug-07 2:45

Nishad S

30-Aug-07 2:45

What about using a loop?

int max = 30;
for( int n = 0; n < max; n++ )
{
sscanf( data_in, "%f", &temp[n] );
}

- NS -

Re: sscanf, reading unknown number of variables

Jim Warburton30-Aug-07 2:50

Jim Warburton

30-Aug-07 2:50

Thanks for the help.

Jim

this thing looks like it was written by an epileptic ferret
Dave Kreskowiak

Re: sscanf, reading unknown number of variables

Nishad S30-Aug-07 2:55

Nishad S

30-Aug-07 2:55

Welcome... Smile | :)

- NS -

Accessing remote (shared) files

insignia30-Aug-07 2:05

insignia

30-Aug-07 2:05

CFile::GetStatus(filePath, fStatus) works fine with local files, but does NOT work with remote shared files when accessed by UNC.

Any ideas on how to access/read/write remote files from MFC C++ apps would be greatly appreciated?

Thanks in advance.

Re: Accessing remote (shared) files

David Crow30-Aug-07 3:12

David Crow

30-Aug-07 3:12

insignia wrote:
CFile::GetStatus(filePath, fStatus) works fine with local files, but does NOT work with remote shared files when accessed by UNC.

Unless I misunderstood your question, this works fine for me:

CFileStatus stat;
CFile::GetStatus(_T("\\\\machine\\share\\boot.ini"), stat);

"A good athlete is the result of a good and worthy opponent." - David Crow

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

how to use group of radio button as single control?

Banks K30-Aug-07 0:58

Banks K

30-Aug-07 0:58

Hello All,

i am preparing a application in which i am using multiple group box which having multiple radio buttons and check boxes.

i want to use a group box of multiple radio button as a single control so i

please share your knowledge.

thanks

Re: how to use group of radio button as single control?

Naveen30-Aug-07 1:08

Naveen

30-Aug-07 1:08

Put the tab order in the sequence.( to see the tab order take the dialog in the resource and press ctrl + D ).

nave

[OpenedFileFinder]

Re: how to use group of radio button as single control?

KarstenK30-Aug-07 1:19

KarstenK

30-Aug-07 1:19

...and start every group of button with the group property.

Tip: in resource view use Ctrl+T and Ctrl+D and look and click (to sort) :->

Greetings from Germany

Re: how to use group of radio button as single control?

David Crow30-Aug-07 3:13

David Crow

30-Aug-07 3:13

As long as you put them in the proper z-order and use the WS_GROUP style correctly, this is how they are supposed to behave.

"A good athlete is the result of a good and worthy opponent." - David Crow

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

how to get 32-bit graphics on EVC++ 4.0 SP4

mercenary0130-Aug-07 0:53

mercenary01

30-Aug-07 0:53

How do I put a BMP file that would display 32-bit worth of colors. The EVC++ seems to be lower the color specs of whatever image I pu on the dialog box., advice

Thanks,

Samuel

MFC Dialog

Bhavesh Bagadiya30-Aug-07 0:49

Bhavesh Bagadiya

30-Aug-07 0:49

I have crated a MFC dialog which i coded as model dialog. what is easy way to convert it in to modeless dialog.

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