C / C++ / MFC

Re: C++ function source code size

15-Apr-09 15:15

You could well be right - I used it on embedded system code, and we didn't have much 'macro magic'.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Eureka_jim16-Apr-09 6:13

Eureka_jim

16-Apr-09 6:13

Thanks. This is a nice tool, and it gives a lot more information than I expected.

Re: C++ function source code size

Rolf Kristensen15-Apr-09 11:50

Rolf Kristensen

15-Apr-09 11:50

Here is list of SLOC metric tools:

LOC Metrics - Alternative Tools[^]

Source Monitor[^] seems to provide what you need, as it can provide a quick overview of all methods and how many statements they have. Just create a baseline and right-click the baseline and choose "Display Method Metrics...."

Also I would recommend to use Doxygen to see call hierarchies and class diagrams.

ActiveX

siva45515-Apr-09 8:33

siva455

15-Apr-09 8:33

Hi,
im using Wshell.Regwrite to write registry(vb script) through html page...
but it works fine only when the option "Initialize and script ActiveX
controls not marked as safe" under Tools\internet
options/Security/Customlevel/ActiveX controls and plugIns ,is set to prompt or enable .....and if we set to any other option ie(disable) it fails ie it shows error like .. "ActiveX component cannot create object "Wscript.shell"...

So May i know whether is it possible to create my own ActiveX control(signed) with certificate(using c++) and embed in my vb script so that it doesn"t depend on internet options..
if yes pls let me know how to do the same...

pls correct me if im wrong...

Re: ActiveX

KarstenK16-Apr-09 4:35

KarstenK

16-Apr-09 4:35

You can make an ActiveX Safe for scripting via the interfaces IObjectSafetyImpl and IObjectSafetySiteLockImpl. Search for the complicated details in the MSDN. Cry | :((

Press F1 for help or google it.
Greetings from Germany

SendMessage in VS 2008

CString(0xcccccccc)15-Apr-09 7:41

15-Apr-09 7:41

I wrote an override for the OnNcPaint. It works fine, but I have a problem.
I want Windows to do the painting in a part of the NC area and let me do the painting for the remaning part.

More precisely, I want windows to draw the menu and let me do the remaining of the painting.

My ideea is to paint what I need then send a WM_NCPAINT message and a handle in wParam to the region where I want Windows to do the painting. The problem is that SendMessage drowns in some ATL code (I'm unfamiliar with ATL).

The error is about accessing an invalid address. I suppose Windows cannot access the definition of the region referred by my region handle. I think I'm supposed to do some sort of marshalling of the HRGN object, but as I said, I'm unfamiliar with ATL. Can somebody help ?

Stuart Dootson15-Apr-09 9:43

15-Apr-09 9:43

CString(0xcccccccc) wrote:
More precisely, I want windows to draw the menu and let me do the remaining of the painting.

The way to do that is (in your WM_NCPAINT handler) to call DefWndProc, then do your painting. Don't send any extra messages or anything.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CString(0xcccccccc)15-Apr-09 12:48

15-Apr-09 12:48

Tried this one, unsuccessfully:
::DefWindowProc(m_hWnd, WM_NCPAINT, (WPARAM) pRgn->m_hObject, pMsg->lParam);

Stuart Dootson15-Apr-09 15:33

15-Apr-09 15:33

If you're handling the message in a CWindowImpl derivative, you should be able to call the DefWindowProc method with no arguments to do this - here's a fragment of an ATL-based window class showing the message map and handler method:

BEGIN_MSG_MAP(CWtlsdiView)
  MESSAGE_HANDLER(WM_NCPAINT, OnNcPaint)
END_MSG_MAP()

LRESULT OnNcPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
{
   DefWindowProc();
   // Do your painting
   return 0;
}

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CString(0xcccccccc)15-Apr-09 21:31

15-Apr-09 21:31

Allowing Windows to paint the entire NC area, then painting over it will cause flickering. I need to limit the area where Windows paints by passing a region handle with the message.

Stuart Dootson15-Apr-09 22:30

15-Apr-09 22:30

I've had some success (I think) with this code for handling OnNcPaint:

CRect GetCaptionRect(CWindow& wnd)
{
   // Get size of frame around window
   DWORD dwStyle = wnd.GetStyle();
   CSize szFrame = (dwStyle & WS_THICKFRAME) ?
      CSize(GetSystemMetrics(SM_CXSIZEFRAME),
      GetSystemMetrics(SM_CYSIZEFRAME)) :
   CSize(GetSystemMetrics(SM_CXFIXEDFRAME),
      GetSystemMetrics(SM_CYFIXEDFRAME));

   int cxIcon = GetSystemMetrics(SM_CXSIZE); // width of caption icon/button

   CRect r;
   // Compute rectangle
   wnd.GetWindowRect(&r);		// window rect in screen coords
   r -= CPoint(r.left, r.top);	// shift origin to (0,0)
   r.left  += szFrame.cx;				// frame
   r.right -= szFrame.cx;				// frame
   r.top   += szFrame.cy;				// top = end of frame
   r.bottom = r.top + GetSystemMetrics(SM_CYCAPTION)  // height of caption
      - GetSystemMetrics(SM_CYBORDER);				  // minus gray shadow border
   return r;
}

class MyDialog : public CDialogImpl<MyDialog>
{
public:
   BEGIN_MSG_MAP(MyDialog)
      MESSAGE_HANDLER(WM_NCPAINT, OnNcPaint)
   END_MSG_MAP()

   LRESULT OnNcPaint(UINT nMsg, WPARAM hRgn, LPARAM lParam, BOOL& /*bHandled*/)
   {
      CRect r = GetCaptionRect(*this);
      r.right = r.left + r.Width()/2;
      HRGN onlyRedrawIn = ::CreateRectRgn(r.left, r.top, r.right, r.bottom);

      ::DefWindowProc(m_hWnd, nMsg, (WPARAM)onlyRedrawIn, lParam);
      return 0;
   }
};

The trouble is (I think) that your handler sometimes gets routed around - have you read this article[^] by Paul DiLascia about custom caption bars? It talks about MFC, but is relevant to ATL and Windows in general.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CString(0xcccccccc)16-Apr-09 11:38

16-Apr-09 11:38

It's not the first time I see that article of Paul DiLascia. His ideeas are nice, just one problem they don't work in my implementation. Anyway, there's something wrong with the article, the author wonders about the undocumented wParam = 1 (in WM_NCPAINT), while the MSDN clearly states it stands for "entire NC area needs repainting".

As about your code, first of all thank you for your effort.
Basically you're doing what I'm doing, just my code doesn't work.

Did you test it with VS 2008 ?

I tried to browse the MFC sources, it's a brand new world, there's no more WindowProc with message loop. Lots of ATL code.

My code follows:

void CMainFrame::OnNcPaint()
{
	const MSG* pMsg = GetCurrentMessage();

	CRgn rgnWnd, rgnCli, rgnMenu;
	int iMenuHeight = GetSystemMetrics(SM_CYMENU); //height of the menu bar

	// Compute the NC region as a difference between the window rect and client rect.
	// The region must be relative to top left corner of the window
	CRect rcWnd, rcCli;
	// Get the window rect (relative to the top-left corner of the window)
	GetWindowRect(&rcWnd);
	CPoint ptOffset = - rcWnd.TopLeft();
	rcWnd.OffsetRect(ptOffset);

	// Get the client rect (relative to the top-left corner of the window)
	GetClientRect(&rcCli);
	ClientToScreen(rcCli);
	rcCli.OffsetRect(ptOffset);
	
	// Include de menu bar in the client area
	rcCli.top -= iMenuHeight;

	// Create regions for the window rect and client rect
	rgnWnd.CreateRectRgn(rcWnd.left, rcWnd.top ,rcWnd.right ,rcWnd.bottom);
	rgnCli.CreateRectRgn(rcCli.left, rcCli.top ,rcCli.right ,rcCli.bottom);
	
	// Obtain their difference (that will be the entire non client area without the menu bar)
	rgnWnd.CombineRgn(&rgnWnd, &rgnCli, RGN_DIFF);

	// Create a region for the menu bar
	rgnMenu.CreateRectRgn(rcCli.left, rcCli.top, rcCli.right, rcCli.top + iMenuHeight);

	if(pMsg->wParam != 1) // Is only a part of the nc area requiring repaint ?
	{ // If it's so:
		// Get the region requiring painting:
		CRgn r;
		r.CreateRectRgn(0,0,0,0);
		r.CopyRgn(CRgn::FromHandle((HRGN) pMsg->wParam));
		r.OffsetRgn(ptOffset); // Screen coordinates need to be transformed to window coordinates
		
		// Intersect with the NC area without the menu bar:
		rgnWnd.CombineRgn(&rgnWnd, &r, RGN_AND);
		
		// Intersect with the menu bar:
		rgnMenu.CombineRgn(&rgnMenu, &r, RGN_AND);
	}

	// Paint the nonclient area without the menu bar:
	CWindowDC dc(this);
	CBrush brush;
	brush.CreateSolidBrush(RGB( 255, 0, 0 ));
	dc.FillRgn(&rgnWnd, &brush);

	// Paint the menu bar:
	CRect rcBox;
	rgnMenu.GetRgnBox(&rcBox);
	if(!rcBox.IsRectEmpty()) // Make sure the region is not empty
		::DefWindowProc(m_hWnd, WM_NCPAINT, (WPARAM) rgnMenu.m_hObject, 0); // has no effect
}

Stuart Dootson16-Apr-09 13:46

16-Apr-09 13:46

CString(0xcccccccc) wrote:
As about your code, first of all thank you for your effort.
Basically you're doing what I'm doing, just my code doesn't work.

Did you test it with VS 2008 ?

It's the only VS I use these days...

CString(0xcccccccc) wrote:
Anyway, there's something wrong with the article, the author wonders about the undocumented wParam = 1 (in WM_NCPAINT), while the MSDN clearly states it stands for "entire NC area needs repainting"

I suspect that bit of MSDN's been fixed since then - the article is 12 years old Smile | :)

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CString(0xcccccccc)16-Apr-09 22:16

creating tooltip that follows cusor, to display coordinates.

16-Apr-09 22:16

I solved the problem. Thank you for your help. Even though there are significant differences because I used it in an MDI application, knowing that somebody else solved the problem was really helpful.

That persuaded me to double check carefully everything. The problem was that I was calling the DefWindowProc with a region in window coordinates instead of screen coordinates. Now it works.

soongez15-Apr-09 6:21

soongez

15-Apr-09 6:21

Hi, I have a custom control that I've made and I want a tooltip hover near the the mouse as move over it, and stay near the mouse, i.e. illustrating positions of the current position within the custom control.

I used the code from MSDN, but I must not be getting it quite right as its not doing anything right now, so I can't start writing code so that it follows my cursor.
So far I've added a OnMouseHover event, so when the cursor enters the area of the custom control I think I should create a tooltip. Here is what I have so far.

// toolID:  the resource ID of the control.
// hDlg:    the handle of the dialog box.
// pText:   the text that appears in the ToolTip.
// g_hInst: the global instance handle.

//HWND hwndTool = GetDlgItem(NULL, IDC_LINECHART1);

// CREATE A TOOLTIP WINDOW
HWND hwndTip = CreateWindowEx(NULL, TOOLTIPS_CLASS, NULL,
    WS_POPUP |TTS_ALWAYSTIP | TTS_BALLOON,
    CW_USEDEFAULT, CW_USEDEFAULT,
    CW_USEDEFAULT, CW_USEDEFAULT,
    NULL, NULL,
    NULL, NULL);

// Associate the ToolTip with the tool.
TOOLINFO toolInfo = { 0 };
toolInfo.cbSize = sizeof(toolInfo);
toolInfo.hwnd = m_hWnd;
toolInfo.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
toolInfo.uId = IDC_LINECHART1;//(UINT_PTR)hwndTool;
toolInfo.lpszText = _T("FAIL");
::SendMessage(hwndTip, TTM_ADDTOOL, 0, (LPARAM)&toolInfo);

I'm not really sure what hDlg and g_hInst is supposed to be, and how to get it,

thanks
soong

Re: creating tooltip that follows cusor, to display coordinates.

Stuart Dootson15-Apr-09 9:40