Re: Trackbar Control - C / C++ / MFC Discussion Boards

Re: Derived class causes error

BuckBrown21-Mar-06 3:15

BuckBrown

21-Mar-06 3:15

Thanks,

I love simple answers. Works great, lasts a long time.

Buck

VC++ Express Edition 2005

thierrypp17-Mar-06 10:48

thierrypp

17-Mar-06 10:48

Hello ,

I would be grateful if you could tell me exactly how to download
VC++ Express Edition 2005 on a CD rom.

This in order to setting it up on an other computer.
Can I have a key too?
Note that the other computer has no internet connection.

Also, where could I find tested samples for VC++ Express Edition 2005.

I Thank you!

Regards,

TPP

Re: VC++ Express Edition 2005

George L. Jackson17-Mar-06 12:03

George L. Jackson

17-Mar-06 12:03

You do a manual install: http://msdn.microsoft.com/vstudio/express/support/install/[^]

Re: VC++ Express Edition 2005

thierrypp17-Mar-06 22:18

thierrypp

17-Mar-06 22:18

Thanks a lot,

But you get a regulat key? for the other computer ?

your link is exactly what I was looking for!

Thanks and Regards,
TPP

richedit controls

Waldermort17-Mar-06 7:47

Waldermort

17-Mar-06 7:47

I have found a few examples of how to use the richedit control 4.1 within an MFC app, but does anybody know how I can implement its usage in a non-mfc app?

I have a dialog with a rich edit control which contains a table. currently I'm using version 3 of the control which shows the table, but when it comes to populating cells I'm having problems. Mainly that the control doesn't seem to implement much of the table formating commands. The table cells do not resize, /par is ignored /qc is ignored etc...

I doubt my code is to blame as I am simply loading a rtf file created with version 4.1 and displaying it within my own control.

Re: richedit controls

Waldermort17-Mar-06 8:26

Waldermort

17-Mar-06 8:26

Nevr mind, I fixed it. For anybody else who may be trying to do the same:

In WinMain:
InitCommonControlsEx()
LoadLibrary( "Msftedit.dll" ); // check the return value

When creating the window:
CreateWindowEx(0,"RICHEDIT50W","",WS_TABSTOP ....

If you created the control using the resource editor, you must open the .rc file with a text editor and change the class from "RICHEDIT" to "RICHEDIT50W".

Point to note, the Msftedit.dll is not distributable, and it will only work with Windows XP service pack 1 and above.

Trackbar Control

amanoullah17-Mar-06 7:44

amanoullah

17-Mar-06 7:44

Hi everyone. anyone knows how to create a trackbar in visual c++ using Win32 API?? I dont know what header file to include. Thanks in advance.

AmanN

Re: Trackbar Control

Waldermort17-Mar-06 7:53

Waldermort

17-Mar-06 7:53

You need to include commctrl.h and link with comctl32.lib. You create a trackbar pretty much the same as any other control

InitCommonControls(); // loads common control's DLL 

    hwndTrack = CreateWindowEx( 
        0,                             // no extended styles 
        TRACKBAR_CLASS,                // class name 
        "Trackbar Control",            // title (caption) 
        WS_CHILD | WS_VISIBLE | 
        TBS_AUTOTICKS | TBS_ENABLESELRANGE,  // style 
        10, 10,                        // position 
        200, 30,                       // size 
        hwndDlg,                       // parent window 
        ID_TRACKBAR,             // control identifier 
        g_hinst,                       // instance 
        NULL                           // no WM_CREATE parameter 
        );

You can find a wealt of information here[^] regarding track bars and how to use them.

Re: Trackbar Control

Ravi Bhavnani17-Mar-06 11:33

Ravi Bhavnani

17-Mar-06 11:33

Corrected[^] link. Smile | :)

/ravi

My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Where are IE favourites in registry

Chintoo72317-Mar-06 6:10

Chintoo723

17-Mar-06 6:10

If I am to add an IE favourite programmaticallly
- is there an IE API?
- where are the favourites stored in registry?

thanks!

Re: Where are IE favourites in registry

Michael Dunn17-Mar-06 6:53

Michael Dunn

17-Mar-06 6:53

Use SHGetSpecialFolderPath(CSIDL_FAVORITES) to get the dir that holds the favorites. Create a new one using the internet shortcut APIs.

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | NEW!! PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

How do i create my own bitmap?

woosoo17-Mar-06 5:23

woosoo

17-Mar-06 5:23

I used MFC AppWizard->Selected Single Document Interface-> and all nexts then clicked ok at step six using Visual Studio 6.0.
I then put this following code in the OnDraw() function in FilenameView.cpp.
I didn't change any other codes than this.

void CWoosooView::OnDraw(CDC* pDC)
{
CWoosooDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here

///////////////////////
// MY CODE STARTS HERE
///////////////////////

///////////////////////////////////////
// i tried to make a pointer and put in some numbers 0~255 to make a rectangle pyramid.
///////////////////////////////////////
int size;
unsigned char *p;
p = (unsigned char*)malloc(size*size);
for(int y = 0; y<size; y++)
{
="" for(int="" x="0;" x<size;x++)
{
="" if="" ((x="">=0 && x<(size/2))&&(y>=0 && y<(size/2)))
*(p+size*y+x) = (x+y);
else if ((x<size &&="" x="">=(size/2))&&(y>=0 && y<(size/2)))
*(p+size*y+x) = (size-x+y-1);
else if ((x>=0 && x<(size/2))&&(y<size &&="" y="">=(size/2)))
*(p+size*y+x) = (size+x-y-1);
else if ((x<size &&="" x="">=(size/2))&&(y<size &&="" y="">=(size/2)))
*(p+size*y+x) = (2*size-2-x-y);
}
}

////////////////////////////////////
CBitmap bitmap; // i made a bitmap
CDC memDC; // and a device context
memDC.CreateCompatibleDC(pDC);// then made it compatible
bitmap.CreateBitmap(size,size,1,8,p);//**************problem line
memDC.SelectObject(bitmap);// then let the device context select it.
pDC->StretchBlt(0,0,size,size,&memDC,0,0,size,size,SRCCOPY);// and displayed.
free(p);
}
///////////////////////
// MY CODE ENDS HERE
///////////////////////
}

***********problem line, which is ====> bitmap.CreateBitmap(size,size,1,8,p);
// here's the problem. when i change the 4th value 8 to 1, a monochrome pyramid appears when executed. but i'm trying to make the pyramid smoother just like the greyscale. so 8 should be left 8, i think....

Right now, nothing appears on screen.
someone plz helpme~~

woosoo

-- modified at 12:02 Friday 17th March, 2006

Re: How do i create my own bitmap?

PJ Arends17-Mar-06 13:45

PJ Arends

17-Mar-06 13:45

A tool for debugging memory bitmaps and device contexts[^].

Check the return values from the GDI functions. They let you know if an error occurs.

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good - Use it!

Re: How do i create my own bitmap?

woosoo18-Mar-06 5:38

woosoo

18-Mar-06 5:38

Thanks

woosoo

x ==> next biggest power of two

peterchen17-Mar-06 5:06

peterchen

17-Mar-06 5:06

Is there a "trick" to get the next biggest power of two for a given value?

I wonder if there's something without a loop (or a binary search).

I know the N & (N-1) == 0 <==> N is a power of two trick, but that doesn't help me much finding something.

Some of us walk the memory lane, others plummet into a rabbit hole

Tree<t> in C# || Fold With Us! || sighist

Re: x ==> next biggest power of two

C^hris L^osinger17-Mar-06 5:10

C^hris L^osinger

17-Mar-06 5:10

http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2[^]

Cleek | Image Toolkits | Thumbnail maker

Re: x ==> next biggest power of two

peterchen17-Mar-06 6:07

peterchen

17-Mar-06 6:07

Wow!
thanks - I just had the entire dev team come to a screeching halt after asking the question...

Some of us walk the memory lane, others plummet into a rabbit hole

Tree<t> in C# || Fold With Us! || sighist

Re: x ==> next biggest power of two

jhwurmbach17-Mar-06 6:51

jhwurmbach

17-Mar-06 6:51

peterchen wrote:
I just had the entire dev team come to a screeching halt after asking the question...

So this question did cost your company several million dollars?!? Cool | :cool:

"We trained hard, but it seemed that every time we were beginning to form up into teams we would be reorganised. I was to learn later in life that we tend to meet any new situation by reorganising: and a wonderful method it can be for creating the illusion of progress, while producing confusion, inefficiency and demoralisation."

-- Caius Petronius, Roman Consul, 66 A.D.

Re: x ==> next biggest power of two

peterchen17-Mar-06 13:06

peterchen

17-Mar-06 13:06

We ain't that big, and it was friday afternoon... (sorry, boss)

Some of us walk the memory lane, others plummet into a rabbit hole

Tree<t> in C# || Fold With Us! || sighist

Re: x ==> next biggest power of two

Gordon Brandly17-Mar-06 7:47

Gordon Brandly

17-Mar-06 7:47

There's another way to do it in one line that I found a couple of years ago:
http://groups.google.ca/group/microsoft.public.dotnet.languages.vc/browse_frm/thread/25ab3420e6ccbfe6/ae5c585e9be6d790?lnk=st&q=_INTSIZEOF(&rnum=1#ae5c585e9be6d790[^]

I don't know if it's any better or worse than what Chris suggested.

Re: x ==> next biggest power of two

krmed17-Mar-06 10:06

krmed

17-Mar-06 10:06

Another solution would be:

int iNextPower2 = 0;<br />
double x;    //this contains the number you want to find the next hightest power of 2<br />
<br />
iNextPower2 = (int)((log10(x)/log10(2) + 0.5)

This works for raising any base to a power... number of significant digits for an octal number representation of a decimal number would be:

<br />
iPower = (int)((log10(decimalvalue)/log10(8) + 0.5)

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
<kmedcalf@ev1.net>
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: x ==> next biggest power of two

Jörgen Sigvardsson17-Mar-06 10:49

Jörgen Sigvardsson

17-Mar-06 10:49

A much slower solution (in terms of CPU cycles), it should be noted. Smile | :)

--
Pictures[^] from my Japan trip.

Re: x ==> next biggest power of two

peterchen17-Mar-06 13:09

peterchen

17-Mar-06 13:09

yep, that's the "natural" solution, but much to expensive. Thanks anyway Smile | :)

Some of us walk the memory lane, others plummet into a rabbit hole

Tree<t> in C# || Fold With Us! || sighist

Re: x ==> next biggest power of two

krmed18-Mar-06 3:21

krmed

18-Mar-06 3:21

Sorry, I must have missed where you indicated it must have a very low cost in cpu cycles.

I was just giving a generic solution without loops like I believed you were looking for.

Karl - WK5M
PP-ASEL-IA (N43CS)
<kmedcalf@ev1.net>
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: x ==> next biggest power of two

David Crow17-Mar-06 16:42

David Crow

17-Mar-06 16:42

See this thread.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

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