Add a bubble prompt on the menu bar

This function is derived from an example "Tooltips for Menu Item and Popup MenuItem", in fact, the steps of the example are very simple, but I don't plan to translate it. Mr. Lin Yutang is not said: "I only use the same thing, no Understand the truth, it is really not high. " The core of this feature is that the author has a MenutooltiP class, 182 line code implements the function of the menu prompt. Here I explain it, and there is a specific explanation after each line code. #ifndef _MENU_TOOLTIP // conditional compilation statements to determine whether the definition of the _MENU_TOOLTI the following macro #define _MENU_TOOLTIP // define some constants identifier #ifndef TTS_NOANIMATE #define TTS_NOANIMATE 0x10 #define TTS_NOFADE 0x20 #define TTS_BALLOON 0x40 #define TTS_CLOSE 0x80

#define ttm_settitlea (WM_USER 32) // wparam = tti_ *, lparam = char * sztitle #define TTM_SETTILEW (WM_USER 33) // wparam = tti_ *, lparam = wchar * sztitle

#ifdef unicode #define TTM_SETTILE TTM_SETTITLEW #Else #define TTM_SETTILE TTM_SETTITLEA # Endif # ENDIF

Class cmenutooltip {

Public: cmenutooltip (): m_htooltip (0), m_hparent (0) {}

// Create a menu item related tips and void Create (HWND hParent, LPCTSTR sczTipText, HINSTANCE hInstance = NULL, DWORD dwStyle = 0, LPCTSTR sczTipTitle = NULL); This function is called void OnMenuSelect (UINT nItemID // trigger when WM_MENUSELECT news, UINT NFLAGS, HMENU HSUBMENU;

/ / Display or hide the function void showtooltip (bool bshow) {ToolInfo Ti; // ToolInfo is a structure / / / / below to initialize some of the variables in this structure Ti.cbsize = Sizeof (ToolInfo); // Set the size of the structure Ti.uflags = TTF_IDishWnd; // Indicates that the UID member is the handle Ti.hWnd = m_hparent; / / contains the handle of the prompt Ti.uID = (uint) m_hparent; // application definition identification Message // Message Send the prompt :: SendMessage (m_htooltip, ttm_trackactivate, (wparam) BSHOW, (LPARAM) & Ti);}

// Setting the position of the prompt Void SetTooltipPosition (HMENU HMENU, UINT NITEMID) {Rect RT = {0, 0, 0, 0}; // Find item Rectangle and position // Based on the number of menu items complete the following loop for (int NItem = 0; NITEM <:: getMenuItemcount (HMENU); NITEM ) {uint cmd = :: getMenuItemID (HMENU, NITEM); // Put the identifier of the current menu item in a variable // If the current menu item is selected Set menu item, get the area IF (cmd == nitemid) {:: getMenuItemRect (M_HParent, HMENU, NITEM, & RT);}} // sends a message to set the location of the display: SendMessage (M_HTooltip) , Ttm_trackposition, 0, (lparam) makelparam (rt.right, rt.bottom 2)); // Tips to display at the top floor, otherwise the prompt arrow will appear under the menu, try seeing: -> :: setwindowpos M_HTooltip, hwnd_topmost, 0,0,0,0, swp_nosize | swp_noactivate | swp_nomove;} // Update prompt information void UpdateTooltiptext (lpctstr szbuff, hinstance hinstance = 0) {

TOOLINFO ti; ti.cbSize = sizeof (TOOLINFO); ti.uFlags = TTF_IDISHWND; ti.hwnd = m_hParent; ti.uId = (UINT) m_hParent; ti.hinst = hInstance; ti.lpszText = const_cast (szBuff) ; // Update the content // Send Update message: SendMessage (m_htooltip, ttm_updatetiptext, (wparam) 0, (lparam) & ti);} // Overload Handle Operator HWnd () {Return M_HTOOLTIP;}

Private: hwnd m_htooltip; hwnd m_hparent; tchar m_szdefault; // stores the string Hinstance M_HINSTANCE (}) of default prompt;

The following inline functions inline // Create a prompt control void CMenuToolTip :: Create (HWND hParent, LPCTSTR sczTipText, HINSTANCE hInstance, DWORD dwStyle, LPCTSTR sczTipTitle) {INITCOMMONCONTROLSEX icex; // registered public control class in the dynamic link library TOOLINFO common controls in Ti; // load the tooltip class from the dll. Icex.dwsize = sizeof (cex); ICEX.DWICC = ICC_BAR_CLASS; // Returns if (! INITCOMMONTROLSEX (& Icex)) return;

m_hParent = hParent; m_hInstance = hInstance; // create a prompt control m_hToolTip = :: CreateWindow (TOOLTIPS_CLASS, TEXT ( ""), WS_POPUP | dwStyle, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, (HMENU) NULL, hInstance, NULL) ; // Some of the initial parameters of the control Ti.cbsize = sizeof (ToolInfo); Ti.uflags = TTF_IDishWnd | TTF_TRANSPARENT | TTF_TRACK | TTF_ABSOLUTE; // TTF_CENTIP TI.HWND = HParent; Ti.uID = (uint) hParent; TI. Hinst = hinstance; ti.lpsztext = const_cast (scztiptext); if (scztiptext! = lpstr_textCallback) {// The following setting default prompt text if (scztiptext) {// If there is a prompt text if the current menu is prompting, Store to m_szdefault _tcscpy (m_szdefault, scztiptext);} else {// If there is no prompt text, display the following string _tcscpy (m_szdefault, _t ("no text associated");}}

Ti.Rect.Left = Ti.Rect.top = Ti.Rect.Bottom = Ti.Rect.Right = 0;

// Add the prompt to the control :: SendMessage (m_htooltip, ttm_addtool, 0, (lparam) & ti);

:: SendMessage (M_HTooltip, TTM_SETMAXTIPWIDTH, 0, 300); if (scztitle) {:: SendMessage (m_htooltip, ttm_settitle, 1, (lparam) scztiPtitle);}}

Inline // The following operation of the inline function is set to the operation void cfertooltip :: OnMenuSelect (uint nitemid, uint nflags, hmenu hsubmenu) {if (nflags & mf_popup || (nflags == 0xfffff && hSubMenu == NULL)) {// Do not prompt showtooltip (false) when the menu is closed;}

IF (! (NFLAGS & MF_POPUP)) {// Setting the location settooltipPosition (HSubMenu, NItemID);

/ / Update the prompt text TCHAR SZBUFF [256]; / / Defines the character array SZBUFF [0] = 0 of the storage prompt text; // store the specified prompt text into a preset buffer in an int NRET = :: LoadString (M_HINSTANCE, NITEMID, SZBUFF, 256); # if 0 for (INT i = 0; i