Dialog problem - C / C++ / MFC Discussion Boards

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Re: How do I add a custom mimize button?

Tomasz Sowinski24-Jul-01 7:37

Tomasz Sowinski

24-Jul-01 7:37

You'll have to handle WM_NCPAINT. DrawFrameControl can help in button drawing. This was discussed once in MSJ, search your VC++ help for ShadeCap.

Tomasz Sowinski -- http://www.shooltz.com

TransparentBlt , Win95 ( not supported + problems )

Leon24-Jul-01 6:25

Leon

24-Jul-01 6:25

Hi ,

As far as I understand function TransparentBlt isn't supported in Win95
and some versions of NT. Not just that : it needs msimg32.dll and as I've
heard causes some memory and resources related problems.

What I need is function

BOOL MyTransparentBlt (
HDC hdcDest, // handle to destination DC
int nXOriginDest, // x-coord of destination upper-left corner
int nYOriginDest, // y-coord of destination upper-left corner
int nWidthDest, // width of destination rectangle
int hHeightDest, // height of destination rectangle
HDC hdcSrc, // handle to source DC
int nXOriginSrc, // x-coord of source upper-left corner
int nYOriginSrc, // y-coord of source upper-left corner
int nWidthSrc, // width of source rectangle
int nHeightSrc, // height of source rectangle
UINT crTransparent // color to make transparent
);

That will work under Win95 and won't cause problems. I need
just this only function ( source ) - don't want to deal
with "msimg32.dll"

I'll appreciate Your help,
Thank You Smile | :)

Re: TransparentBlt , Win95 ( not supported + problems )

24-Jul-01 10:32

This is what U need
void MyTransparentBlt( HDC hdcDest, int nXDest, int nYDest, int nWidth,
int nHeight, HDC hBmpDC/*, HBITMAP hBitmap*/, int nXSrc, int nYSrc,
COLORREF colorTransparent, HPALETTE hPal)
{
HDC hdcMask = ::CreateCompatibleDC( hdcDest );
HDC hdcTmp = ::CreateCompatibleDC( hdcDest );
HBITMAP bmMask = ::CreateBitmap( nWidth, nHeight, 1, 1, NULL );
HBITMAP hOldMaskBitmap = (HBITMAP)::SelectObject( hdcMask, bmMask );
HBITMAP hTmpBmp = CreateCompatibleBitmap(hdcDest, nWidth, nHeight);
HBITMAP hOldTmpBmp = (HBITMAP)::SelectObject(hdcTmp, hTmpBmp);

::BitBlt(hdcTmp, 0,0,nWidth, nHeight, hBmpDC, nXSrc, nYSrc, SRCCOPY );

::SetBkColor( hdcTmp, colorTransparent );

::SetTextColor( hBmpDC, RGB( 0, 0, 0 ) );
::BitBlt( hdcMask, 0, 0, nWidth, nHeight, hdcTmp, 0, 0, SRCCOPY );
HDC hdcOffScr = ::CreateCompatibleDC(hdcDest);
::SetBkMode(hdcOffScr, TRANSPARENT);
HBITMAP hbmOffScr = ::CreateBitmap(nWidth, nHeight,
(BYTE)GetDeviceCaps(hdcDest, PLANES),
(BYTE)GetDeviceCaps(hdcDest, BITSPIXEL),
NULL);
HBITMAP hbmOldOffScr = (HBITMAP)::SelectObject(hdcOffScr, hbmOffScr);
::BitBlt(hdcOffScr, 0, 0, nWidth, nHeight, hdcDest, nXDest, nYDest, SRCCOPY);
::SetBkColor( hBmpDC, RGB( 0, 0, 0 ) );
::SetTextColor( hBmpDC, RGB( 0xff, 0xff, 0xff ));
COLORREF crOldBackColor = ::GetBkColor( hdcDest );
COLORREF crOldTextColor = ::GetTextColor( hdcDest );
::SetBkColor( hdcOffScr, RGB( 0xff, 0xff, 0xff ) );
::SetTextColor( hdcOffScr, RGB( 0, 0, 0 ) );
::BitBlt( hdcOffScr, 0, 0, nWidth, nHeight, hBmpDC, 0, 0, SRCINVERT );
::BitBlt( hdcOffScr, 0, 0, nWidth, nHeight, hdcMask, 0, 0, SRCAND );
::BitBlt( hdcOffScr, 0, 0, nWidth, nHeight, hBmpDC, 0, 0, SRCINVERT );
::SetBkColor( hdcOffScr, crOldBackColor );
::SetTextColor( hdcOffScr, crOldTextColor );
::SetBkMode(hdcDest, TRANSPARENT);

::BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hdcOffScr, 0, 0, SRCCOPY);
if ( hOldMaskBitmap )
::SelectObject( hdcMask, hOldMaskBitmap );
if ( hbmOldOffScr )
::SelectObject( hdcOffScr, hbmOldOffScr );
if ( hOldTmpBmp )
::SelectObject( hdcTmp, hOldTmpBmp );

::DeleteObject( hTmpBmp );
::DeleteObject( bmMask );
::DeleteObject( hbmOffScr );
::DeleteDC( hdcOffScr );
::DeleteDC( hdcTmp );

::DeleteDC( hdcMask );
}

but with more effort you could do your self(msdn etc), like I did it is a lot more fun !!

good luck,
Dror

Re: TransparentBlt , Win95 ( not supported + problems )

Christian Graus24-Jul-01 13:04

Christian Graus

24-Jul-01 13:04

I've not tested the code someone else just offered, but I notice it failed to allow for a differering source and destination size. I don't even have the code here, but the Sept issue of WDJ will have an article from me on doing exactly what you want, and also alphablend under W95. Basically to change the code below you just need to do a stretchblt to change the source bitmap to the dimensions of the destination.

Christian

#include "std_disclaimer.h"

The careful application of terror is also a form of communication.

Eagles may soar, but weasels don't get sucked into jet engines.

What would be magical about the Control ID of a radio Button?

tm24-Jul-01 6:09

24-Jul-01 6:09

It seems that when I dynamically create my radio button (i.e at run time) the text gets displayed if I choose certain UID number and not the other ones.
m_RadioButtonArray[nDex].Create("paradi",
WS_GROUP | WS_VISIBLE | WS_CHILD | BS_AUTORADIOBUTTON , ctrlRect,this, 2013 );

Note that on this screen I am also dynamically creating other edit controls that their GUI ID ranges from 1999 to 2011 !!!!

Paradise is where I am.
Voltaire

converting decimal to hexadecimal

24-Jul-01 6:07

anyone knows how to convert an int variable from decimal to hex?? I am using VC++ and MFC, but am looking for a simple function to do it.
please reply to me at asengupt@uiuc.edu
Thanks!
ananya
(student)

Re: converting decimal to hexadecimal

Not Active24-Jul-01 7:24

Not Active

24-Jul-01 7:24

If you want to print it use something like printf, or use _ltoa or _ultoa.

Dialog problem

24-Jul-01 5:56

i've created a Dialog app using the MFC wizard. now, i want to add to the dialog a tool-bar and a status-bar. so i added this code to onInitDialog():

UINT indicators [3] =
{
ID_PAN1,
ID_PAN2,
ID_PAN3
};

if (!m_status.Create(this))
{
TRACE0("Failed to create toolbar\n");
return -1; // fail to create
}
m_status.SetIndicators(indicators, 3);

if (!toolbar.Create(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
!toolbar.LoadToolBar(IDR_TOOLBAR1))
{
TRACE0("Failed to create toolbar\n");
return -1; // fail to create
}

i think its ok, but when i execute the app, i dont see neither the statusbar nor the toolbar

Pliz jelp. thanks

Re: Dialog problem

24-Jul-01 7:27

MFC sample DLGCBAR32 does exactly that.

Tomasz Sowinski -- http://www.shooltz.com

this sample doesnf help me!

24-Jul-01 10:55

another idea?

Re: this sample doesnf help me!

Carlos Antollini24-Jul-01 11:10

Carlos Antollini

24-Jul-01 11:10

Why the sample don't help?
The sample that said Tomasz is very good.
Try to explain that you don't understand....
Regards

Carlos Antollini.

ID??

24-Jul-01 5:12

hi

almost every control has a parameter ID in its Create() function...(CButton for example)

what is that parameter and what should i pass to the function?
i've tried to put any number and it worlks, but it looks wrong to me

thanks

Re: ID??

Christian Graus24-Jul-01 13:06

Christian Graus

24-Jul-01 13:06

The ID is defined in resource.h and then passed in by name. This is so there is no double up, where two controls have the same ID.

Christian

#include "std_disclaimer.h"

The careful application of terror is also a form of communication.

Eagles may soar, but weasels don't get sucked into jet engines.

Serialize : How can I know if the loading from the file success ???

24-Jul-01 5:04

I want to use in serialize and CArchive for save and load from file
But I don't know how can I check if the loading success ?
Who can help me ? Confused | :confused:

Re: Serialize : How can I know if the loading from the file success ???

C~~MFC6.0~~VS.NETUser24-Jul-01 5:20

C~~MFC6.0~~VS.NETUser

24-Jul-01 5:20

Try using...

if(ArchiveObj.isLoading())
{
     //do if CArchive::isLoading() returns true
     //Loading Data...
}
else
{
     //do if CArchive::isLoading() returns false
     //Storing Data...
}

Hope it works...

I think you dont understand me.

24-Jul-01 10:23

I need to check if the operation of the loading itself is successes or that failed for example in case that the file terminated suddenly.

Re: I think you dont understand me.

C~~MFC6.0~~VS.NETUser27-Jul-01 6:10

C~~MFC6.0~~VS.NETUser

27-Jul-01 6:10

Sorry, In your if/else bodies you need to check the for the end of the file. Try using a counter, and the CFile::GetLength() if CArchive derives from CFile(I don't rememeber) or if not CFile::GetStatis(/*FileName as param*/) which fills the CFileStatis(The Name may be wrong so check MSDN) obj and the CFileStatis obj will have a length memeber(check MSDN for name). You need to use if statements to test the counter to see if counter is smaller than the file length. When you read the Archive add the amount you just read from the Archive to the counter(this is hard to do and I can explain it here maybe later in this thread if you like).

Hope this helps...

Real World Coding:
POP& BuyAPop(Money ADollar){...};

Re: I think you dont understand me.

Matt Gullett27-Jul-01 6:30

Matt Gullett

27-Jul-01 6:30

CArchive will throw an exception if it encounters a probloem while loading or saving the file. This includes if it encounters an unexpected end of file.

(code assumes fp is a CFile object already opened.)

try
{
CArchive ar(&fp, CArchive::load);

// serialize objects here

ar.Close();
}
catch(CArchiveException* pArError)
{
// an error occured
pArError->Delete();
}
catch(CException* pError)
{
// an error occured
pError->Delete();
}
catch(...)
{
// an error occured
}

How can you brush your text in yellow ??

24-Jul-01 10:25

Re: How can you brush your text in yellow ??

Carlos Antollini27-Jul-01 6:26

Carlos Antollini

27-Jul-01 6:26

With <'PRE'> and <'/PRE'> without '

Carlos Antollini.

Re: How can you brush your text in yellow ??

C~~MFC6.0~~VS.NETUser27-Jul-01 6:27

C~~MFC6.0~~VS.NETUser

27-Jul-01 6:27

By using the <pre> HTML Tags...

<pre>What you want to be Preformatted.</pre>

The <pre> allows you to display a fixed font and more than one space(HTML allow only one space to be displayed outside of <pre>...</pre> ). The yellow is applyed by www.codeproject.com in maybe a stylesheet that replaces the background color of all the <pre>...</pre> it find.

Real World Coding:
POP& BuyAPop(Money ADollar){...};

Filling an HBITMAP with an HICON

24-Jul-01 4:40

I have an HICON, and need to be copy the contents of it to a HBITMAP.

How could I do this, please?

Peter

Re: Filling an HBITMAP with an HICON

Tomasz Sowinski24-Jul-01 5:03

Tomasz Sowinski

24-Jul-01 5:03

Call DrawIcon or DrawIconEx for memory device context with HBITMAP selected.

Tomasz Sowinski -- http://www.shooltz.com

bit data types

Johnny Starr24-Jul-01 4:28

Johnny Starr

24-Jul-01 4:28

Anyone know how to read bits using a structure?

I used to do it like this using Borland. I need to know how to do it in MFC.

union test
{
int n 1:8;
unsigned char c;
}

This may not be correct syntax its been a while.

Old ansi C stuff.

JLS
Student/Part time programmer
Major Programming.

Re: bit data types

Tomasz Sowinski24-Jul-01 4:34

Tomasz Sowinski

24-Jul-01 4:34

This will compile when you remove space between 'n' and '1' and add semicolon after }.

Tomasz Sowinski -- http://www.shooltz.com

Last Visit: 31-Dec-99 18:00 Last Update: 27-Sep-24 13:21

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