Re: Clistbox greying - C / C++ / MFC Discussion Boards

How to show AVI file in a CDialog?

vgrigor17-Feb-04 23:50

vgrigor

17-Feb-04 23:50

How to show AVI file in a CDialog?

(what better way?)

thanks

Re: How to show AVI file in a CDialog?

Prakash Nadar18-Feb-04 2:06

Prakash Nadar

18-Feb-04 2:06

use MFC class CAnimationCtrl

"When death smiles at you, only thing you can do is smile back at it" - Russel Crowe (Gladiator)

Re: How to show AVI file in a CDialog?

vgrigor18-Feb-04 2:40

vgrigor

18-Feb-04 2:40

thanks.

Clistbox greying

SVPG17-Feb-04 23:43

SVPG

17-Feb-04 23:43

How do a grey a CListBox based on some option ,
say option A the ListBox should be enabled with Window color as bg
for option B, the listbox should be disabled with btn face color and all list items also greyed..like a greyed edit box
PS its CListBox not a CListCtrl

Re: Clistbox greying

sps-itsec4618-Feb-04 0:30

sps-itsec46

18-Feb-04 0:30

I don't know if I exactly understood what you want to do, but if you want to enable or disable the control you can use the EnableWindow() function, e.g.:

void EnableMyListBox()
{
    myListBox.EnableWindow(TRUE);
}

void DisableMyListBox()
{
    myListBox.EnableWindow(FALSE);
}

When you disable the listbox it will be grayed out.
Hope it'll help!

Regards, mYkel

Re: Clistbox greying

SVPG18-Feb-04 0:36

SVPG

18-Feb-04 0:36

True, but I want the background to be greyed as well. If I do a fillrect with a brush (COLOR_BTNFACE), EnableWindow(FALSE) still causes it to have a white background even though the listbox is disabled.

Re: Clistbox greying

Robert A. T. Káldy18-Feb-04 0:53

Robert A. T. Káldy

18-Feb-04 0:53

See CWnd::OnCtlColor() documentation. I don't have experiences with it but, it could solve your problem.

Robert-Antonio

"CRAY is the only computer, which runs an endless loop in just 4 hours"

Re: Clistbox greying

sps-itsec4618-Feb-04 1:29

sps-itsec46

18-Feb-04 1:29

As another poster said you can use the OnCtlColor() method for this. Assuming you have a button for changing between the grayed and not grayed state like this:

void CListBoxGrayingTestDlg::OnButtonGray() 
{
    // TODO: Add your control notification handler code here
	
    if(m_bGrayed)
    {
        m_bGrayed = FALSE;
        m_MyListBox.EnableWindow(TRUE);
    }
    else
    {
        m_bGrayed = TRUE;
        m_MyListBox.EnableWindow(FALSE);
    }
}

Adding a message handler for WM_CTLCOLOR you can now do something like this:

HBRUSH CListBoxGrayingTestDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
    HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
 
    // TODO: Change any attributes of the DC here
 
    // Set background transparent
    pDC->SetBkMode(TRANSPARENT);
 
    if (pWnd->GetDlgCtrlID() == IDC_MYLISTBOX)
    {
        if(m_bGrayed)
            return (HBRUSH)GetStockObject(GRAY_BRUSH);
        else
            return (HBRUSH)GetStockObject(WHITE_BRUSH);
    }
 
    // TODO: Return a different brush if the default is not desired
    return hbr;
}

Now the background will be grayed, when the control is disabled... Wink | ;)

Regards, mYkel

Re: Dialog application on TOP

Robert A. T. Káldy17-Feb-04 23:36

Robert A. T. Káldy

17-Feb-04 23:36

I don't understand the consequences between dialog on top and fullscreen application...
however, you should set the WS_EX_TOPMOST style in CDialog::CreateEx().

Robert-Antonio

"CRAY is the only computer, which runs an endless loop in just 4 hours"

Re: Dialog application on TOP

neokialo17-Feb-04 23:47

neokialo

17-Feb-04 23:47

Thanks,

I just found i could select Overlapped from within the Properties page of the Dialog.
It probably does the same as your solution.

Best regards

Neok

Rotating a BitMap

Pazzuzu17-Feb-04 23:13

Pazzuzu

17-Feb-04 23:13

Hi,

Iam in trouble rotating the bitmap.
Iam doing it as follows:

HBITMAP handle;
//Functin from which I get a handle
//to the Bitmap.

handle = GetBitmapHandle();
CDC dcMemory;
dcMemory.CreateCompatibleDC(pDC);
CBitmap *bitmap=CBitmap::FromHandle(handle);
BITMAP bm;
bitmap->GetBitmap(&bm);
//Rotating the Bitmap by 90.
XFORM xFormBarcode;
SetGraphicsMode(pDC->GetSafeHdc(),GM_ADVANCED);
xFormBarcode.eM11 = (FLOAT)cos(90*DEGREES2RADIANS);
xFormBarcode.eM12 = (FLOAT)sin(90*DEGREES2RADIANS);
xFormBarcode.eM21 = (FLOAT)-sin(90*DEGREES2RADIANS);
xFormBarcode.eM22 = (FLOAT) cos(90*DEGREES2RADIANS);
xFormBarcode.eDx = 0;
xFormBarcode.eDy = 0;

int xCord =0;
int yCord =0;

int x =abs((xCord*(FLOAT)cos(90*DEGREES2RADIANS)) + (yCord * (FLOAT)-sin(90*DEGREES2RADIANS)));
int y = (xCord*(FLOAT)sin(90*DEGREES2RADIANS)) + (yCord * (FLOAT)cos(90*DEGREES2RADIANS));

SetWorldTransform(pDC->GetSafeHdc(),&xFormBarcode);

CBitmap* pOldBitmap = dcMemory.SelectObject(bitmap);
double bmWidth = bm.bmWidth;
double bmHeight = bm.bmHeight;

pDC->BitBlt(100,100,bm.bmWidth,bm.bmHeight, &dcMemory, 0,0,SRCCOPY);
dcMemory.SelectObject(pOldBitmap);

I can't see the rotated effect.How Could I rotate it..

Any help is appreciated...

Thanks...

Re: Rotating a BitMap

TchouTchou Project18-Feb-04 2:52

TchouTchou Project

18-Feb-04 2:52

Quite a simple program you have done, which open the bitmap, but which do nothing on it.... Because you miss the loop on every pixels of the Bitmap.
To make it rotate, you should had some computation of the the net position of each pixel and copy from the original bitmap to a destination bitmap. The best way is to make the loop on each pixel of the destination bitmap.
But be carefull that you have to initialize a destination bitmap (may be temporar) which has the enough size increased by rotation factor.
You can have a look on a good routine in cximage (very good library) wher you will find in one of the cpp file the exmeple of rotating (use search "Rotate" to find it).
Hoping that it will hlp you....

NKH

Re: Rotating a BitMap

Pazzuzu18-Feb-04 2:55

Pazzuzu

18-Feb-04 2:55

Okay,Thanks.....

Question on CEvent

DimpleSurana17-Feb-04 22:14

DimpleSurana

17-Feb-04 22:14

If i declare a CEvent object as a member of my class -
a) Is it created such that it is manual reset / automatic
b) If automatic how do i tell the CEvent object that it shud be manul reset

Dimple

Re: Question on CEvent

Prakash Nadar17-Feb-04 22:20

Prakash Nadar

17-Feb-04 22:20

CEvent( BOOL bInitiallyOwn = FALSE, BOOL bManualReset = FALSE, LPCTSTR lpszName = NULL, LPSECURITY_ATTRIBUTES lpsaAttribute = NULL );

this is the construtor of the CEvent , all are optional constructor, you need to set it the way you want it,
2nd parameter will be of some interest to you.

regards,
Prakash.

"When death smiles at you, only thing you can do is smile back at it" - Russel Crowe (Gladiator)

Re: Question on CEvent

DimpleSurana17-Feb-04 22:27

DimpleSurana

17-Feb-04 22:27

Agreed that the constructor helps me specify the same but how do i use the constructor in creating my object. Ok lets put it this way

class A {
CEvent e;
}

now how do i create e with the constructor.

I hope u r getting my problem

Re: Question on CEvent

DimpleSurana17-Feb-04 22:28

DimpleSurana

17-Feb-04 22:28

(Well i found answer to my first question it is automatic)

Agreed that the constructor helps me specify the same but how do i use the constructor in creating my object. Ok lets put it this way

class A {
CEvent e;
}

now how do i create e with the constructor.

I hope u r getting my problem

Re: Question on CEvent

Prakash Nadar17-Feb-04 23:06

Prakash Nadar

17-Feb-04 23:06

class A{
{
CEvent e(TRUE,TRUE,NULL,NULL);
}

this creats a event that is initialy owned, manual reset, unnamed event, null security.

Hope i cleared ur problem.

"When death smiles at you, only thing you can do is smile back at it" - Russel Crowe (Gladiator)

Re: Question on CEvent

DimpleSurana17-Feb-04 23:11

DimpleSurana

17-Feb-04 23:11

It gives syntax error on compilation

Re: Question on CEvent

_Magnus_17-Feb-04 23:21

_Magnus_

17-Feb-04 23:21

Class A
{
   CEvent e;

   A() : e(NULL,NULL,NULL)
   {
   }
};

/Magnus

- I don't necessarily agree with everything I say

Re: Question on CEvent

DimpleSurana17-Feb-04 23:31

DimpleSurana

17-Feb-04 23:31

hmm thats a inline definition...
i dont wanna create my class object in that fashion & neither does that compile.
My class A has its own constructor

Re: Question on CEvent

_Magnus_17-Feb-04 23:35

_Magnus_

17-Feb-04 23:35

That is the syntax for calling membervaribles ctors, put it
in your class A's ctor.

/Magnus

- I don't necessarily agree with everything I say

Re: Question on CEvent

DimpleSurana17-Feb-04 23:49

DimpleSurana

17-Feb-04 23:49

This is the scenario
class A {

A(int,ClassB *b);

CEvent e;

}

In the implementation file ->

A::A(int,ClassB *b) {
What do i put here?
}

Re: Question on CEvent

_Magnus_17-Feb-04 23:52

_Magnus_

17-Feb-04 23:52

A::A(int,ClassB *b) :
   e(NULL,NULL)
{
}

The actual params to e above is wrong, pass them as you like to
have them.

/Magnus

- I don't necessarily agree with everything I say

Re: Question on CEvent

DimpleSurana18-Feb-04 0:10

DimpleSurana

18-Feb-04 0:10

Ok that solves my problem, thanks Smile | :)

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