C / C++ / MFC Discussion Boards

Re: CStatic::SetIcon Transparent.

Paresh Chitte21-Apr-08 20:30

Paresh Chitte

21-Apr-08 20:30

Hi Hamid,

I have seen this article and this does not serve my purpose.

Regards,
Paresh.

Re: CStatic::SetIcon Transparent.

Rajkumar R21-Apr-08 21:39

Rajkumar R

21-Apr-08 21:39

I think you need to paint alpha blended explicitly, AlphaBlend[^] and make sure you handled OnEraseBkgnd so that Static control doesnot painted its own background

have a look at Using the AlphaBlend function[^]

Re: CStatic::SetIcon Transparent.

Paresh Chitte22-Apr-08 0:09

Paresh Chitte

22-Apr-08 0:09

Thanks Rajkumar,

AlphaBlend works for bitmaps.
I have to use icons.

Regards
Paresh

Re: CStatic::SetIcon Transparent.

Rajkumar R22-Apr-08 2:19

Rajkumar R

22-Apr-08 2:19

before that, I would like to know what is the result when you tried with your code.

Re: CStatic::SetIcon Transparent.

Paresh Chitte22-Apr-08 18:07

Paresh Chitte

22-Apr-08 18:07

class CMyDialog : public CDialog<br />
{<br />
 ........<br />
 CStatic m_StaticIcon;<br />
 ........<br />
}<br />
<br />
HBRUSH CMyDialog:OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) <br />
{<br />
 HBRUSH hbr = CDialog:OnCtlColor(pDC, pWnd, nCtlColor);<br />
 <br />
 switch(nCtlColor)<br />
 {<br />
 case CTLCOLOR_STATIC:<br />
  if (pWnd->m_hWnd == m_StaticIcon.m_hWnd)<br />
  {<br />
   pDC->SetBkMode(TRANSPARENT);<br />
   return (HBRUSH)(GetStockObject(NULL_BRUSH));<br />
  }<br />
  break;<br />
 }<br />
 return hbr;<br />
}<br />
<br />
<br />
BOOL CMyDialog:OnInitDialog() <br />
{<br />
 .........<br />
 m_StaticIcon.Create(_T(""), WS_CHILD | WS_VISIBLE | SS_ICON, <br />
        CRect(0, 0, 0, 0), this);<br />
<br />
 HICON hIcon = ::LoadIcon(AfxGetResourceHandle(), MAKEINTRESOURCE(ICON_ID));<br />
 m_StaticIcon.SetIcon(hIcon);<br />
 .........<br />
}

In CMyDialog:OnPaint(), I have painted a region of CDialog with GradientFill(...), and on this area I want a static icon, which needs to be transparent. So that I can see the background of CStatic icon as gradient. But this icon has been painted with background of rest of dialog and not the region, which I have painted with GradientFill.

I hope I have mentioned the problem correctly.

Regards,

Paresh.

Re: CStatic::SetIcon Transparent.

Rajkumar R22-Apr-08 19:19

Rajkumar R

22-Apr-08 19:19

I would suggest very simple approach as you want to display only the icon, use DrawIcon, inplace of doing a lot of stuff over CStatic.

1) add the icon as member variable.

class CMyDialog : public CDialog
{
........
  HICON m_hStaticIcon;// CStatic m_StaticIcon;
........
}

2) load the icon

BOOL CMyDialog:OnInitDialog() 
{
.........
 /*m_StaticIcon.Create(_T(""), WS_CHILD | WS_VISIBLE | SS_ICON, 
CRect(0, 0, 0, 0), this);*/

m_hStaticIcon = ::LoadIcon(AfxGetResourceHandle(), MAKEINTRESOURCE(ICON_ID));
/*m_StaticIcon.SetIcon(hIcon);*/
.........
}

Paresh Chitte wrote:
In CMyDialog:OnPaint(), I have painted a region of CDialog with GradientFill(...), and on this area I want a static icon,

3) Now you draw the icon over the painted region.

void CMyDialog::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting
                .....
                .....
	}
	else
	{
		CDialog::OnPaint();
		CClientDC dc(this);
                // you painted the region with gradient fill
                // after that draw the icon over the gradient region
		dc.DrawIcon(100, 100, m_hStaticIcon);
	}
}

Re: CStatic::SetIcon Transparent.

Paresh Chitte23-Apr-08 1:08

Paresh Chitte

23-Apr-08 1:08

Hi Rajkumar,

The solution you have provided is perfectly working for me.

Thank you very much for your kind help. Smile | :)

Regards,
Paresh.

ExitWindowsEx

john563221-Apr-08 19:37

john5632

21-Apr-08 19:37

Hi,

The below code is not working:
ExitWindowsEx(EWX_REBOOT|EWX_FORCE,0);

In which condition it may fail?

Re: ExitWindowsEx

Hamid Taebi21-Apr-08 19:47

Hamid Taebi

21-Apr-08 19:47

Whats the return value ? and see A tool to perform automatic shutdown, log off or restart action[^].

Re: ExitWindowsEx

john563221-Apr-08 20:13

john5632

21-Apr-08 20:13

Return value is 0. And I have checked this.

Re: ExitWindowsEx

Rajkumar R21-Apr-08 20:19

Rajkumar R

21-Apr-08 20:19

not that, what's the return value of GetLastError().

possibly the privilege issue, The application must first enable the SE_SHUTDOWN_NAME privilege[^]

Re: ExitWindowsEx

john563221-Apr-08 20:20

john5632

21-Apr-08 20:20

Using getLastError, I got the error 1314 (The required previlige is not held by the client). What it means?

Re: ExitWindowsEx

Rajkumar R21-Apr-08 20:24

Rajkumar R

21-Apr-08 20:24

pther wrote:
What it means?

see my previous reply

Re: ExitWindowsEx

Hamid Taebi21-Apr-08 20:34

Hamid Taebi

21-Apr-08 20:34

Did you see my link?

Com Ports

usyra4221-Apr-08 19:34

usyra42

21-Apr-08 19:34

Hello Friends,

Can anyone say how to find the number of ports and the name of ports such as COM1, COM2 etc in our PC using a VC++ program. I searched it everywhere, but i couldnt find a proper source code.
Can u please help in this..

usharani

Re: Com Ports

Rajkumar R21-Apr-08 19:43

Rajkumar R

21-Apr-08 19:43

Serial ports. Enumeration [^] may be useful

usyra42 wrote:
searched it everywhere

Re: Com Ports

usyra4221-Apr-08 20:35

usyra42

21-Apr-08 20:35

It is Very confusing because we dont have complete source code there .
Can u help me in this

usharani

Re: Com Ports

Rajkumar R21-Apr-08 20:45

Rajkumar R

21-Apr-08 20:45

don't you have the implementation of BeginEnumeratePorts, EnumeratePortsNext, EndEnumeratePorts posted in the page itself.

Re: Com Ports

usyra4221-Apr-08 21:58

usyra42

21-Apr-08 21:58

Hi Raj thanks very much it was helpful a lot..................

usharani

speed up serial communication

vijay.victory21-Apr-08 19:21

vijay.victory

21-Apr-08 19:21

Hi experts,

I m a VC++ developer and i used Windows API CreateFile() for serial communication. but it decrease the speed of sending n receiving bytes from port.

can u please answer me how to speed up communication?

I also set the TimeOuts to '0' so that it doesnt take any timeout waitng..

Please reply..

Its really matter to me..

Re: speed up serial communication

Cedric Moonen21-Apr-08 20:21

Cedric Moonen

21-Apr-08 20:21

Member 3220373 wrote:
but it decrease the speed of sending n receiving bytes from port.

What do you mean ? Decrease compated to what ? Confused | :confused:

Cédric Moonen
Software developer

Charting control [v1.4 - Updated]

Re: speed up serial communication

vijay.victory22-Apr-08 0:07

vijay.victory

22-Apr-08 0:07

the time taken by my program in VC++ is very greater than same implemented
program in TurboC++

My observation;;

if i used a file to write on device connected on my COM4 have size 172kb

then TurboC++ pgm takes only 54sec but VC++ pgm takes 211 sec

almost 3.5 times.

so i want some special function or tric to increase the speed of this transmisssion..

reply...plzzzzzzz

Re: speed up serial communication

CPallini21-Apr-08 21:45

CPallini

21-Apr-08 21:45

Member 3220373 wrote:
can u please answer me how to speed up communication?

Use USB. (just kidding).

Please elaborate.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Re: speed up serial communication

Randor 21-Apr-08 22:53

Randor

21-Apr-08 22:53

Overlapped I/O[^] will give you better results than synchronous blocking calls to WriteFile and ReadFile. The examples at Microsoft show you how to do it.

http://msdn2.microsoft.com/en-us/library/ms810467.aspx[^]

This article may also be useful:

http://www.codeproject.com/KB/system/serial_com.aspx[^]

Best Wishes.
-David Delaune

Re: speed up serial communication

vijay.victory22-Apr-08 0:16

vijay.victory

22-Apr-08 0:16

Thnks for reply...

I already used DCB structure in my program..

but have same effect...

the probm is If i load a file of 172kb using TurboC++ prgm

then it takes appx 55 sec...
but
when I load file using VC++ prgm that uses CreateFile() API
it takes appx 211 sec... i.e. appox 3.5 times.of TC

so plz... reply....any option to decrease load delay..

n speed up my transmission...

PLz ..... ur reply always matter to me..

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