CodeProject Latest postings for CButtonST v3.9 (MFC Flat buttons)

Abnormal focus behaviour

EricMic — Mon, 25 Feb 2013 14:23:00 GMT

Hi,

Thank you very much for this !

I however had to change some code :

void CButtonST::OnEnable(BOOL bEnable) 
{
	CButton::OnEnable(bEnable);
	
	if (bEnable == FALSE)	
	{
		//CWnd*	pWnd = GetParent()->GetNextDlgTabItem(this);
		//if (pWnd)
		//	pWnd->SetFocus();
		//else
		//	GetParent()->SetFocus();
		CancelHover();
	} // if
} // End of OnEnable

I commented the SetFocus part because it bring some abnormal button behavior. I believe setting the focus to the next tab item might be done only if the disabled button is the current control with focus.

thx.

My vote of 4

shetkarabhijeet — Tue, 11 Dec 2012 06:05:00 GMT

thanks for this!

Grayscale not working correctly on 32 bit alpha - (fixed)

namezero111111 — Tue, 09 Oct 2012 18:25:00 GMT

Hello folks,

I had a problem with this class that grayscale icons were not correctly created because the CreateGrayScaleIcon() method sometimes created black pixels.
Here's the solution (copied from here):

In BtnST.h:
To protected section, add:

HICON CreateGrayscaleIcon(HICON hIcon, COLORREF* pPalette);

In BtnST.cpp replace the whole CButtonST::CreateGrayscaleIcon() method with:

HICON CButtonST::CreateGrayscaleIcon(HICON hIcon, COLORREF* pPalette)
{
	if (hIcon == NULL)
	{
		return NULL;
	}
 
	HDC hdc = ::GetDC(NULL);
 
	HICON      hGrayIcon      = NULL;
	ICONINFO   icInfo         = { 0 };
	ICONINFO   icGrayInfo     = { 0 };
	LPDWORD    lpBits         = NULL;
	LPBYTE     lpBitsPtr      = NULL;
	SIZE sz;
	DWORD c1 = 0;
	BITMAPINFO bmpInfo        = { 0 };
	bmpInfo.bmiHeader.biSize  = sizeof(BITMAPINFOHEADER);
 
	if (::GetIconInfo(hIcon, &icInfo))
	{
		if (::GetDIBits(hdc, icInfo.hbmColor, 0, 0, NULL, &bmpInfo, DIB_RGB_COLORS) != 0)
		{
			bmpInfo.bmiHeader.biCompression = BI_RGB;
 
			sz.cx = bmpInfo.bmiHeader.biWidth;
			sz.cy = bmpInfo.bmiHeader.biHeight;
			c1 = sz.cx * sz.cy;
 
			lpBits = (LPDWORD)::GlobalAlloc(GMEM_FIXED, (c1) * 4);
 
			if (lpBits && ::GetDIBits(hdc, icInfo.hbmColor, 0, sz.cy, lpBits, &bmpInfo, DIB_RGB_COLORS) != 0)
			{
				lpBitsPtr     = (LPBYTE)lpBits;
				UINT off      = 0;
 
				for (UINT i = 0; i < c1; i++)
				{
					off = (UINT)( 255 - (( lpBitsPtr[0] + lpBitsPtr[1] + lpBitsPtr[2] ) / 3) );
 
					if (lpBitsPtr[3] != 0 || off != 255)
					{
						if (off == 0)
						{
							off = 1;
						}
 
						lpBits[i] = pPalette[off] | ( lpBitsPtr[3] << 24 );
					}
 
					lpBitsPtr += 4;
				}
 
				icGrayInfo.hbmColor = ::CreateCompatibleBitmap(hdc, sz.cx, sz.cy);
 
				if (icGrayInfo.hbmColor != NULL)
				{
					::SetDIBits(hdc, icGrayInfo.hbmColor, 0, sz.cy, lpBits, &bmpInfo, DIB_RGB_COLORS);
 
					icGrayInfo.hbmMask = icInfo.hbmMask;
					icGrayInfo.fIcon   = TRUE;
 
					hGrayIcon = ::CreateIconIndirect(&icGrayInfo);
 
					::DeleteObject(icGrayInfo.hbmColor);
				}
 
				::GlobalFree(lpBits);
				lpBits = NULL;
			}
		}
 
		::DeleteObject(icInfo.hbmColor);
		::DeleteObject(icInfo.hbmMask);
	}
 
	::ReleaseDC(NULL,hdc);
 
	return hGrayIcon;
}
 
HICON CButtonST::CreateGrayscaleIcon( HICON hIcon )
{
	static COLORREF defaultGrayPalette[256];
	static BOOL bGrayPaletteSet = FALSE;
 
	if (hIcon == NULL)
	{
		return NULL;
	}
 
	if (!bGrayPaletteSet)
	{
		for(int i = 0; i < 256; i++)
		{
			defaultGrayPalette[i] = RGB(255-i, 255-i, 255-i);
		}
 
		bGrayPaletteSet = TRUE;
	}
 
	return CreateGrayscaleIcon(hIcon, defaultGrayPalette);
}

Re: compile warning.

Mark Potter — Wed, 05 Sep 2012 15:53:00 GMT

I replied to an earlier thread on this subject, but with the organization of this discussion board I think no one would notice a reply to an 8-year old message, so to repeat myself...

When building this code, one gets a compiler warning:
BtnST.cpp(19) : warning C4005: 'BS_TYPEMASK' : macro redefinition c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinUser.h(8749) : see previous definition of 'BS_TYPEMASK'

To which Nirav replied:

I have also encountered the same warning.

Is it because of the MS-Platform SDK that we have installed, as the warning is because the constant is already defined in the WinUser.h in the Platform SDK.

Is this inevitable, or there's something wrong that we're doing?

To which I reply and ask:

The problem isn't just that it is being defined again, but that it is being defined again with a different value. In BtnST.cpp BS_TYPEMASK is defined as SS_TYPEMASK, on my current development system SS_TYPEMASK is defined as 0x0000001FL; however before this line BS_TYPEMASK was 0x0000000FL. So the general questions are:

Should it be 0x1F or 0x0F?

Should it use the SDK's value if defined, but 0x1F if not?

Why SS_TYPEMASK (a Static Control Style value) for BS_TYPEMASK (a Button Style value)?

My vote of 5

Jignesh9969 — Thu, 15 Mar 2012 11:39:00 GMT

This code use in my application and its works fine.

Get color of the button

Member 8544673 — Fri, 10 Feb 2012 05:42:00 GMT

How to get the color of the clicked button.... i am new to mfc could u please explain the use of GetColor(BYTE byColorIndex, COLORREF* crpColor) with an example.

Thank You

GetCheck() error

yl_b — Thu, 01 Dec 2011 02:18:00 GMT

ON_BN_CLICKED(ID_CHECK_GROUP7, OnCheckRec7),in OnCheckRec7,can not get the CheckBox state!

problem with repaint [modified]

Member 1913146 — Wed, 17 Aug 2011 11:52:00 GMT

hello thanks alot
I think if you add this function to (BtnST.cpp) ,when paint
(image button) has been problem , may be solve with this code .
for example if before create (image button) top of it have been a window , after create (button) and move window to other side for see (button) , (button) colored with window color and this problem stay until lifetime.
excuse me for bad english
hessamini@gmail.com

//BtnST.cpp
LRESULT CButtonST::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_NCPAINT:
        {
            m_bmpBk.DeleteObject();
            m_dcBk.DeleteDC();
            m_dcBk.m_hDC=NULL;
        }
    }
    return CButton::WindowProc(message, wParam, lParam);
}
void CButtonST::OnLButtonDown(UINT nFlags, CPoint point)
{
	GetParent()->Invalidate();
	CButton::OnLButtonDown(nFlags, point);
}

salam

modified on Saturday, August 20, 2011 5:00 AM

My vote of 4

lzmthm — Thu, 21 Jul 2011 13:38:00 GMT

so goog for me !

Get24BitPixels problem

jph.torcy — Thu, 14 Apr 2011 14:13:00 GMT

Hi,

There is just a little limitation in the Get24BitPixels() function (Vander Nunes function).

It is written :

    wBmpWidth -= (wBmpWidth%4);             // width is 4 byte boundary aligned.

It should be :

    dwBmpWidth  = (dwBmpWidth+3) & ~3;      // 4 bytes padding

example:
The width of my image is 279 pixels

In the formula you have a width result equals to 276, it should be 280.
The formula only works fine when the width is a multiply of 4.

Bye,
Jean-Philippe

My vote of 5

Joe Sonderegger — Wed, 08 Sep 2010 15:43:00 GMT

It works

My vote of 5

yangpanpan — Tue, 07 Sep 2010 06:33:00 GMT

This control is useful for me in decorating my program, and it is also powerful.

how to set font

batsword — Sun, 05 Sep 2010 02:17:00 GMT

how to set font?thank you

My vote of 5

xiamec — Tue, 31 Aug 2010 00:05:00 GMT

很好很强大，我做课程设计要用！
提个建议，能不能设定按钮的形状，比如随意设置形状为圆形或方形？？
Thank you!

How to change the show time of the function SetTooltipText()? [modified]

VincentWong800 — Sat, 21 Aug 2010 15:12:00 GMT

This class is useful and wonderful! thanks!

I want to know how can i to change the show time of the SetTooltipText()?
I mean is from mouse-in to display the text.

It's about 1 second. I want it no delay.

Thanks a lot!

modified on Saturday, August 21, 2010 3:35 PM

Call stack corruption?

namezero111111 — Sun, 08 Aug 2010 02:36:00 GMT

Hello folks,

I have long used this class in VCC6, and have recently ported a project to VS2k10.
However, I got call stack corruptions on every dialog in the application that used this class.
For this to occur, I merely have to add a button instance of CShadeButtonST or CButtonST at the end of the dialog.
Upon further investigation, I found that adding a dummy int[4] at the end of this class' definition masks the problem with the call stack corruption.

Has anyone else had this problem and found the true cause of it?

thanks !

Nice Gom — Mon, 21 Jun 2010 00:25:00 GMT

it's simple but powerful.

How To Change the Button Text?

a1rex2003 — Tue, 11 May 2010 21:18:00 GMT

I would greatly appreciate if someone could tell me how to change the button text. I have buttons without text and I would like to change/ add text dynamically.
Thank you for your help!

Its parent window can't be desktop...

Aric Green — Mon, 26 Apr 2010 09:41:00 GMT

Why,when its parent wnd is desktop ,it's no longer available.

I am not a genius, but shed more sweat!

3D button double colored- like Regedit GUI

vijayvinoth — Fri, 23 Apr 2010 12:21:00 GMT

have read your "a standard glass button with image " article and it was realy nice and helpful.
I am trying to develop a GUI for my application like Regedit software -GUI.
In Regedit GUI i saw some command buttons which is 3D ,double colored and also looking very professional.
I like to use the same kind of command button in my application.Is it possible for you to develop one sample demo project which has the command buttons looking as it is in Regedit GUI?