C / C++ / MFC

getting device context without the title bar

15-Jul-03 14:51

DavidCrow wrote:
I've never tried it but would sndPlaySound() work?

Only for .WAV files. Using MCI will allow MIDI and MP3 files as well.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Member 45099015-Jul-03 8:21

Member 450990

15-Jul-03 8:21

hi,i am writing an activex control to print the webrowser content through MFC.i want to get the device context of the browserwindow exluding all the title bars etc..(only document of the browser)
my intention is to print completely the document of the browser which might pan horizontally multiple pages.
when i am using
GetWindowDC(browser handle) i am getting the complete screen(that is what this function does)is there a way for me to get just the document area,if i need to use getDC,how can i get the device context by passing the browser handle.i am confused.
please suggest me a solution

regds
GVS

gvs

How to add a Control In a List Control

Cyberizen15-Jul-03 8:01

Cyberizen

15-Jul-03 8:01

hello people
I want to add a COMBO BOX or any other Windows control in a LIST CONTROL that is the COMBO BOX should appear as if it were an item of the LIST CONTROL

Regards
Ahmed Ajmal

Re: How to add a Control In a List Control

John M. Drescher15-Jul-03 8:10

John M. Drescher

15-Jul-03 8:10

It looks like you need a GridControl. Look at Chris Maunders Grid control:

http://www.codeproject.com/miscctrl/gridctrl_combo.asp[^]

John

how to serialize __int64

Shay Harel15-Jul-03 7:55

Shay Harel

15-Jul-03 7:55

MFC has a data type of _int64 but I just found out I can't serialize it...

I can read the low and high words and serialize them seperatly, but that's too much work.

Shay

John M. Drescher15-Jul-03 8:08

John M. Drescher

15-Jul-03 8:08

Shay Harel wrote:
I can read the low and high words and serialize them seperatly, but that's too much work.

If MFC does not searialize _int64 you must do it seperatly.

John

David Crow15-Jul-03 10:09

David Crow

15-Jul-03 10:09

Shay Harel wrote:
MFC has a data type of _int64...

This should read "Microsoft has a data type of _int64..."

Shay Harel wrote:
I can read the low and high words and serialize them seperatly, but that's too much work.

Actually I believe those are DWORDs, which CArchive does know how to handle, but here's a piece of code that might work for you:

char szNum[64];

if (ar.IsStoring())
{
    sprintf(szNum, "%I64u", m_i64MyBigNumber);
    ar.Write(szNum, sizeof(szNum));
}
else
{
    ar.Read(szNum, sizeof(szNum));
    m_i64MyBigNumber = _atoi64(szNum);
}

Anonymous15-Jul-03 15:05

Anonymous

15-Jul-03 15:05

I use the << and >> operators.

What I did is tricky, I just broke it to 2 ints and serialized them one after the other, but I will try your stuff as well.

Converting lines to polygons?

basementman15-Jul-03 10:21

basementman

15-Jul-03 10:21

You can always call the Read and Write methods of CArchive, passing a pointer to your int64. EX:

void CMyClass::Serialize(CArchive &ar)
{
  if (ar.IsStoring())
    {
      ar.Write((void *)&m_i64MyBigInt,sizeof(_int64));
    }
  else
    {
      ar.Read((void *)&m_i64MyBigInt,sizeof(_int64));
    }
}

Using the Read and Write methods allows you to serialize "non-serializable" data (non-mfc data containers).

onwards and upwards...

cdsmith15-Jul-03 7:37

15-Jul-03 7:37

Hello,

I am working on an application where I get passed a list of line segments. I want to convert the line segments into polygons. Anybody have a reference to an algorithm or code fragment that can do this? Anybody have a quick sketch of an algorithm to do this. Thanks for any ideas.

Craig

John R. Shaw15-Jul-03 9:20

John R. Shaw

15-Jul-03 9:20

BOOL Polygon(
HDC hdc, // handle to DC
CONST POINT *lpPoints, // polygon vertices
int nCount // count of polygon vertices
);

or am I missing something?

INTP

Ryan Binns15-Jul-03 14:49

15-Jul-03 14:49

John R. Shaw wrote:
or am I missing something?

Nope. That would be my suggestion as well Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

cdsmith16-Jul-03 3:35

16-Jul-03 3:35

If only it were that ease... Smile | :)

Yup, you are missing something. The lines are from a wire mesh drawing, there are thousands of lines and they make up hundereds of polygons. The trick is to figure out what lines grouped together make up a polygon.

Craig

Rotating a shape within a bounding rect?

John R. Shaw16-Jul-03 6:12

John R. Shaw

16-Jul-03 6:12

Search for "3D Graph ActiveX Control" at codeprject. I have not studied the code but it should help. There is no lack of graphics related sites on the www.

INTP

cdsmith15-Jul-03 7:35

Re: Rotating a shape within a bounding rect?

15-Jul-03 7:35

Hello All,

I am working on a drawing package. The user can drag and drop shapes (i.e. rect, elipse, star,...) and text into defined boxes on the screen. One requirement is to allow the user to rotate the shapes within the boxes. I have the rotation code down, but I am having trouble keeping the rotated shape in the box. For example when the user drops an elipse (tall and narrow) into a box. When I rotate this elipse 45 degrees it becomes bigger than the bounding box.

Any ideas on how to allow the rotation but still keep the shape in the bounding box. Thanks!

Craig

Ryan Binns15-Jul-03 14:48

Re: Rotating a shape within a bounding rect?

15-Jul-03 14:48

Do you want to make the shape smaller so it fits, or clip the shape to the size of the box?

To make it smaller, you'll need to use your maths and recalculate the size of the shape.

To clip the shape to the box, use CRgn::CreateRectRgn() and CDC::SelectClipRgn() to create a rectangular region and clip the drawing to that region.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

cdsmith16-Jul-03 3:40

Re: Rotating a shape within a bounding rect?

16-Jul-03 3:40

I want to make the shape smaller so it fits in the box, I guess I'll get out the geometry text books...

Craig

Ryan Binns16-Jul-03 3:52

16-Jul-03 3:52

Yeah, and when you figure it out, think about writing an article to post. That would be cool Cool | :cool:

It shouldn't be too difficult, but will depend on the shape you're working with. If you're dealing with a polygon, you can calculate the distance out of the box for each point, and scale all the points so that the furthest one fits in the box. Sounds complex, but I don't think it is really, just takes a bit of thought Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Pipes and Child Process

anqin15-Jul-03 7:26

anqin

15-Jul-03 7:26

Hi, is there anybody can help me on my problem of pipes and process. I create two pipes for stdin, stdout/stderr, and CreateProcess a cmd.exe. After entering "exit" to the pipe, cmd.exe terminates. But the parent process does not know the child has terminated. It can read characters from the pipe and WriteFile to the pipe of the child. Of course, there is no reading from the other pipe from the child. So, the information loop is deadlocked. Is there any way to know the child terminates? I know in UNIX, once the child close the pipe, the parent will receive a signal when it reads/writes to the pipe. How about Windows? I am new to Windows. Confused | :confused:

Please reply me by email. Thank you in advance!

Qin An (anqin@leadinghr.com)

Download ActiveX

Anonymous15-Jul-03 5:33

Anonymous

15-Jul-03 5:33

Hi,
does anybody know how to download ActiveX from Apache Server and not from IIS. What should be the HTML Script and where should I put the ActiveX (dll) on Apache Server.
thanks

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer15-Jul-03 5:44

15-Jul-03 5:44

This really isn't the right forum for this question, but we're forgiving here...
Doing it twice risks the Wrath Of BOB!

As the ActiveX control is run client side, it really makes no difference which
web server you use. From the server point of view, it is a file delivered
using the HTTP protocol. No different to an HTML page, jpeg, or gif.

So use the same HTML for either server, and put the control in the equivalent
place on either server.

Iain.

Ryan Binns15-Jul-03 5:52

15-Jul-03 5:52

Iain Clarke wrote:
we're forgiving here

Suspicious | :suss:

Really?

Iain Clarke wrote:
Doing it twice risks the Wrath Of BOB!

Big Grin | :-D

Perhaps you could have told him the Web Development forum is more appropriate Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer15-Jul-03 6:11

15-Jul-03 6:11

Iain Clarke wrote:
we're forgiving here
Ryan Binns wrote:
Suspicious | :suss:

Really?

OK, I'm forgiving. Not like Mr Binns. He's no help to anyone! Wink | ;)

Iain Clarke wrote:
Doing it twice risks the Wrath Of BOB!

We need a Green Alien | [Alien]

smiley... And one with a pitchfork...

Perhaps you could have told him the Web Development forum is more appropriate.

Nah. I'm not that helpful!

Iain.

Ryan Binns15-Jul-03 14:44