C / C++ / MFC

ghunzel06 wrote:

reusability of the custom edit control

class CMyEdit:public CEdit
{
 BOOL m_bNotifyParentOnDrop;

 CMyEdit() {
  m_bNotifyParentOnDrop = FALSE; }

 ...

 void SetNotifyFlag(BOOL bVal) {
  m_bNotifyParentOnDrop = bVal }
};

inDropHandler
...
if (m_bNotifyParentOnDrop)
{
 /* send custom message */
}

ghunzel06 wrote:

// clean up
LocalFree(npszFile);
}

SetWindowText(firstFile);
}

CWnd pwndParent = NULL;
pwndParent = GetParent();
if (pwndParent && pwndParent->GetSafeHwnd())
 pwndParent->SendMessage(CUSTOM_MSG, WPARAM, LAPARAM);

ghunzel06 wrote:

but how about the reusability of the custom edit control?

void CLaunchDlg::OnDropFiles(HDROP dropInfo)
{
	// Get the number of pathnames that have been dropped
	WORD wNumFilesDropped = DragQueryFile(dropInfo, -1, NULL, 0);
 
	CString firstFile= _T("");
 
	// get all file names. but we'll only need the first one.
	for (WORD x = 0 ; x < wNumFilesDropped; x++)
	{
		// Get the number of bytes required by the file's full pathname
		WORD wPathnameSize = DragQueryFile(dropInfo, x, NULL, 0);
 
		// Allocate memory to contain full pathname & zero byte
		WCHAR* npszFile = new(nothrow) WCHAR[wPathnameSize + 1]; // SFH: I use 'new' and not 'LocalAlloc'.
 
		// If not enough memory, skip this one
		if (npszFile == NULL)
		{
			continue;
		}
 
		// Copy the pathname into the buffer
		DragQueryFile(dropInfo, x, npszFile, wPathnameSize + 1);
 
		// we only care about the first
		LPCTSTR pFileName = PathFindFileName(npszFile); // SFH: Extract just the filename.
		firstFile = pFileName;
 
		// clean up
		delete [] npszFile; // SFH: I use 'delete' and not 'LocalFree'.

		break; // SFH: Since we only care about the first why keep looping?
	}

	SetWindowText(firstFile);
}

LiYS wrote:

But in order to use message pump you have to have a window created already

Stephen Hewitt wrote:

No, you don't.

while (GetMessage(&msg, NULL, 0, 0))<br />
{<br />
    TranslateMessage(&msg);<br />
    DispatchMessage(&msg);<br />
}<br />

morocco212 wrote:

convert a floating-point to double precision using c program

float x;
double y;

y = x;