setupgui/windows/tooltip.cpp

// Modifications Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
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#include <windows.h>
#include <commctrl.h>
#include "resource.h"

// DoCreateDialogTooltip - creates a tooltip control for a dialog box,
//     enumerates the child control windows, and installs a hook
//     procedure to monitor the message stream for mouse messages posted
//     to the control windows.
// Returns TRUE if successful or FALSE otherwise.
//
// Global variables
// g_hinst - handle of the application instance
// g_hwndTT - handle of the tooltip control
// g_hwndDlg - handle of the dialog box

// g_hhk - handle of the hook procedure
HHOOK g_hhk;
HWND g_hwndTT;

extern HINSTANCE ghInstance;
#define g_hinst ghInstance

extern HWND g_hwndDlg;

BOOL CALLBACK EnumChildProc(HWND hwndCtrl, LPARAM lParam) ;
LRESULT CALLBACK GetMsgProc(int nCode, WPARAM wParam, LPARAM lParam) ;

BOOL DoCreateDialogTooltip(void)
{

    // Ensure that the common control DLL is loaded, and create
    // a tooltip control.
    InitCommonControls();
    g_hwndTT = CreateWindowEx(0, TOOLTIPS_CLASS, NULL,
        TTS_ALWAYSTIP, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
        CW_USEDEFAULT, g_hwndDlg, NULL, g_hinst, NULL);

    if (g_hwndTT == NULL)
        return FALSE;

    // Enumerate the child windows to register them with the tooltip
    // control.

    if (!EnumChildWindows(g_hwndDlg, (WNDENUMPROC) EnumChildProc, 0))
        return FALSE;

    // Install a hook procedure to monitor the message stream for mouse
    // messages intended for the controls in the dialog box.
    g_hhk = SetWindowsHookEx(WH_GETMESSAGE, GetMsgProc,
        (HINSTANCE) NULL, GetCurrentThreadId());

    if (g_hhk == (HHOOK) NULL)
        return FALSE;

    return TRUE;
}

// EmumChildProc - registers control windows with a tooltip control by
//     using the TTM_ADDTOOL message to pass the address of a

//     TOOLINFO structure.
// Returns TRUE if successful or FALSE otherwise.
// hwndCtrl - handle of a control window
// lParam - application-defined value (not used)
BOOL CALLBACK EnumChildProc(HWND hwndCtrl, LPARAM lParam)
{
    TOOLINFO ti;
    wchar_t szClass[64];

    // Skip static controls.
    GetClassName(hwndCtrl, szClass, sizeof(szClass));
    if (!lstrcmp(szClass, L"Edit")) {
        ti.cbSize = sizeof(TOOLINFO);
        ti.uFlags = TTF_IDISHWND;

        ti.hwnd = g_hwndDlg;
        ti.uId = (UINT)(size_t)hwndCtrl;
        ti.hinst = g_hinst;
        ti.lpszText = LPSTR_TEXTCALLBACK;
        int res = (int)SendMessage(g_hwndTT, TTM_ADDTOOL, 0,
            (LPARAM) (LPTOOLINFO) &ti);
		GetLastError();
		res++;
    }
    return TRUE;
}

// GetMsgProc - monitors the message stream for mouse messages intended
//     for a control window in the dialog box.
// Returns a message-dependent value.
// nCode - hook code
// wParam - message flag (not used)

// lParam - address of an MSG structure
LRESULT CALLBACK GetMsgProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    MSG *lpmsg;

    lpmsg = (MSG *) lParam;
    if (nCode < 0 || !(IsChild(g_hwndDlg, lpmsg->hwnd)))
        return (CallNextHookEx(g_hhk, nCode, wParam, lParam));

    switch (lpmsg->message) {
        case WM_MOUSEMOVE:
        case WM_LBUTTONDOWN:
        case WM_LBUTTONUP:
        case WM_RBUTTONDOWN:
        case WM_RBUTTONUP:
            if (g_hwndTT != NULL) {

                MSG msg;

                msg.lParam = lpmsg->lParam;
                msg.wParam = lpmsg->wParam;
                msg.message = lpmsg->message;
                msg.hwnd = lpmsg->hwnd;
                SendMessage(g_hwndTT, TTM_RELAYEVENT, 0,
                    (LPARAM) (LPMSG) &msg);
            }
            break;
        default:
            break;
    }
    return (CallNextHookEx(g_hhk, nCode, wParam, lParam));
}

// OnWMNotify - provides the tooltip control with the appropriate text

//     to display for a control window. This function is called by
//     the dialog box procedure in response to a WM_NOTIFY message.
// lParam - second message parameter of the WM_NOTIFY message
VOID OnWMNotify(WPARAM wParam, LPARAM lParam)
{
    LPTOOLTIPTEXT lpttt;
    int idCtrl;

    if ((((LPNMHDR) lParam)->code) == TTN_NEEDTEXT) {
        idCtrl = GetDlgCtrlID((HWND) ((LPNMHDR) lParam)->idFrom);
        lpttt = (LPTOOLTIPTEXT) lParam;

        switch (idCtrl) {
#define SET_TIP(edit,tip)\
			case IDC_EDIT_##edit: \
                lpttt->lpszText = tip; \
                return;

			SET_TIP(drvname, L"An unique name for this data source");
			SET_TIP(drvdesc, L"A brief description for this data source");
			SET_TIP(srvname, L"The hostname for the MySQL Server");
			SET_TIP(PORT,    L"The TCP/IP port to use if server is not localhost");
			SET_TIP(username, L"The username used to connect to MySQL");
			SET_TIP(password, L"The password for the server user combination");
			SET_TIP(dbname, L"The database to be current upon connect");
        }
    }
return;
}

void OnDialogClose()
{
    if (g_hhk != (HHOOK) NULL)
    {
        UnhookWindowsHookEx( g_hhk );
    }
}