Tap-And-Hold (TAH) Gesture, tap the action is the action in which the right button is replaced. The ShrecognizeGesture API is used to determine if there is a bit of message. In direct mode, if you have a bit according to the message, return to GN_CONTEXTMENU, otherwise it returns 0. For the notification mode, send the WM_NOTIFY message to bring GN_ContextMenu to the parent window.
1. #include "Aygshell.h"
2. If the CWND window accepts the message, due to the error of the MFC, it should be processed as follows:
Void CMYWND :: ONLBUTTONDOWN (uint nflags, cpoint point)
{
SHRGINFO SHRGI = {0};
Shrgi.cbsize = sizeof (shrginfo);
Shrgi.hwndclient = m_hwnd;
Shrgi.ptdown.x = Point.x;
Shrgi.ptdown.y = point.y;
Shrgi.dwflags = shrg_returncmd;
IF (GN_ContextMenu == :: ShrecognizegeSture (& Shrgi))
ContextMenu (Point);
Else
DEFAULT ();
}
Void CMYCWND :: ContextMenu (cpoint point)
{
CMenu mnuctxt;
Cmenu * pmenu;
CWND * PWND;
IF (! m_nmenuid)
Return;
IF (Mnuctxt.loadMenu (M_NMENUID))
{
PWND = (m_pwndmenu? m_pwndmenu: AFXGETMAINWND ());
PMenu =
Mnuctxt.getsubmenu (0);
IF (PMenu)
{
ClientToscreen (& Point); Pmenu-> TRACKPOPMENU (TPM_LEFTALIGN,
Point.x, Point.y, PWND);
}
}
}
Be careful not to call CWnd :: ONLBUTTONDOWN (UINT NFLAGS, CPOINT), otherwise due to MFC errors, it will respond twice
3. Exception: CListCtrl, CTREECTRL response is correct, as follows
Begin_MESSAGE_MAP (CMYLISTCTRL, CLISTCTRL)
// {{AFX_MSG_MAP (CMYListCtrl)
ON_WM_LBUTTONDOWN ()
ON_WM_LBUTTONUP ()
ON_NOTIFY_REFLECT (GN_ContextMenu, OnListContextMenu)
.
.
.
//}} AFX_MSG_MAP
END_MESSAGE_MAP ()
// CMylistCtrl :: OnListContextMenu
//
// Handles the List Context Menu
//
Void CmylistCtrl :: OnListContextMenu (NmHDR * PNMHDR, LRESULT * PRESULT)
{
CMenu mnuctxt;
Cmenu * pmenu;
CWND * PWND;
NMRGINFO * PINFO;
IF (! m_nlstmenu)
Return;
IF (Mnuctxt.loadMenu (M_NLStmenu))
{
PWnd = (m_pwndmenu? m_pwndmenu: AFXGETMAINWND ()); pmenu = mnuctxt.getsubmenu (0);
IF (PMenu)
{
UINT UFLAGS;
Cpoint pt;
PINFO = (NMRGINFO *) PNMHDR;
Pt = PINFO-> PTAction;
ScreenToClient (& PT);
M_iitemonum = Hittest (PT, & UFLAGS);
//
// Signal this is a tap and all operation
//
m_btapandhold = rue; pmenu-> TRACKPOPUPMENU (TPM_LEFTALIGN, PINFO-> PTAction.x, PINFO-> PTAction.Y, PWND);
}
}
}
// cmylistctrl :: ONLBUTTONDOWN
//
// Special Handler for WM_LButtondown.
// Check for a tap and cover gesture. Never Trust MFC ...
//
Void CMylistCtrl :: ONLBUTTONDOWN (UINT NFLAGS, CPOINT)
{
m_btapandhold = false;
DEFAULT ();
}
// cmylistctrl :: ONLBUTTONUP
//
// the user released the stylus
//
Void CmylistCtrl :: ONLBUTTONUP (UINT NFLAGS, CPOINT)
{
ClistCtrl :: ONLBUTTONUP (NFLAGS, POINT);
m_btapandhold = false;
}
