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how to detect hover over button

Posted on 2013-06-03
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Last Modified: 2013-06-04
I have a button , IDC_BUTTON, and i would like to be notified if it has Been hovered over for 5 second or more.

Could someone show me an example of how i would  thuthis?

Thank you!
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Question by:edvinson
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sarabande earned 2000 total points
ID: 39218139
if using mfc you would use the CMFCTooltipCtrl.

if not using mfc you need to create a new window with window class "TOOLTIPS_CLASSW" and then associate it to the button with code like the following:

INITCOMMONCONTROLSEX icc;
icc.dwSize = sizeof(INITCOMMONCONTROLSEX);
icc.dwICC = ICC_WIN95_CLASSES;
InitCommonControlsEx(&icc);

HWND hwnd_tip = CreateWindowExW(0, TOOLTIPS_CLASSW, NULL, 
  WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP, 
  CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
  NULL, NULL, hinst, NULL
);
SetWindowPos(hwnd_tip, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);

TOOLINFOW ti;
memset(&ti, 0, sizeof(TOOLINFOW));
ti.cbSize = sizeof(TOOLINFOW);
ti.hwnd = hwnd_main;
ti.uId = (UINT) hwnd_control;
ti.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
ti.lpszText = L"This tip is shown correctly, including unicode characters.";
SendMessageW(hwnd_tip, TTM_ADDTOOLW, 0, (LPARAM) &ti);

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if using multibyte characterset you would remove W suffix, for example use SendMessage instead of SendMessageW.

in t.uId you would store the window handle of the button control. the message TTM_ADDTOOL then would make the association of the button with the tooltip.
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LVL 35

Expert Comment

by:sarabande
ID: 39218147
if using mfc you could check some SAMPLES project. see

http://msdn.microsoft.com/en-us/library/cc165840(v=VS.90).aspx

Sara
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LVL 1

Author Comment

by:edvinson
ID: 39218456
I'm not using MfC, does your code example work in a dialog based app?
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LVL 35

Expert Comment

by:sarabande
ID: 39218551
i have not tested the code but found in a forum where they said it was working code. in my expertise it looks ok.

if that is true, it will work with dialogs as well as with any other (parent) window. if you created the dialog form from resources you can get the window handle of the button by calling GetDlgItem(hwndDlg, IDC_BUTTON);

additionally you may make the dialog window parent of the tooltip window by passing the window handle of the dialog with CreateWindowEx call when the tooltip window was created. however, that should be optional.

Sara
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