Windows黄色工具提示多行？

Question

Is it possible to make yellow tooltip in windows multiline?

I tried with \\n but it's not working.

EDIT:

This is the function I have in my code. I followed instructions from MSDN but couldn't get it working (look at the comment: // Multiline tooltip ).

void CreateToolTipForRect(HWND hwndParent)
{
    if (!bCanCreateToolTips)
        return;
    // Get list of areas we want tooltips on
    NSUI::TButton* tbt;
    tbt = gUserInterface->buttonList;

    HWND hwndTT;

    // Array to store all tooltip texts
    static char string[100][ RM_SCROLLTEXT_MAXLEN + 2 ];

    // Go through the list
    while (tbt != NULL)
    {
        // Check id there is a tooltip text defined for this area
        int sid = GetResourceIdFromButtonId(tbt->id);
        if (sid == -1)
        {
            tbt = tbt->next;
            continue;
        }

        if (!ttwnd[tbt->id])
        {
            // Create a ToolTip.
            hwndTT = CreateWindowEx(WS_EX_TOPMOST,
                TOOLTIPS_CLASS, NULL,
                WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP,                       
                CW_USEDEFAULT, CW_USEDEFAULT,
                CW_USEDEFAULT, CW_USEDEFAULT,
                hwndParent, NULL, (( QunicApp * )CQMainGetApp())->CQWinApp_GetHInst(),NULL);

            ttwnd[tbt->id] = hwndTT;

            SetWindowPos(hwndTT, HWND_TOPMOST,
                0, 0, 0, 0,
                SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
            // Get tooltip from resources
            int res = LoadString((( QunicApp * )CQMainGetApp())->CQWinApp_GetHInst(), sid, string[tbt->id], RM_SCROLLTEXT_MAXLEN );
        }
        // Set up "tool" information.
        TOOLINFO ti = { 0 };
        ti.cbSize = sizeof(TOOLINFO);
        ti.uFlags = TTF_SUBCLASS;
        ti.hwnd = hwndParent;
        ti.hinst = (( QunicApp * )CQMainGetApp())->CQWinApp_GetHInst();

        ti.lpszText = string[tbt->id];

        // Set area
        ti.rect.left = tbt->tx;
        ti.rect.right = tbt->bx;
        ti.rect.top = tbt->ty;
        ti.rect.bottom = tbt->by;

        // Associate the ToolTip with the "tool" window.
        SendMessage(ttwnd[tbt->id], TTM_ADDTOOL, 0, (LPARAM) (LPTOOLINFO) &ti);

        // Multiline tooltip - Ilija tried with this
        /*LPNMTTDISPINFO pInfo = (LPNMTTDISPINFO)tbt;
        SendMessage(pInfo->hdr.hwndFrom, TTM_SETMAXTIPWIDTH, 0, 150);*/

        tbt = tbt->next;
    }
    // Extra one, area or button is not known yet
    // Create a ToolTip.
    hwndTT = CreateWindowEx(WS_EX_TOPMOST,
        TOOLTIPS_CLASS, NULL,
        WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP,                       
        CW_USEDEFAULT, CW_USEDEFAULT,
        CW_USEDEFAULT, CW_USEDEFAULT,
        hwndParent, NULL, (( QunicApp * )CQMainGetApp())->CQWinApp_GetHInst(),NULL);

    SetWindowPos(hwndTT, HWND_TOPMOST,
        0, 0, 0, 0,
        SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);

    // Set up "tool" information.
    TOOLINFO ti = { 0 };
    ti.cbSize = sizeof(TOOLINFO);
    ti.uFlags = TTF_SUBCLASS;
    ti.hwnd = hwndParent;
    ti.hinst = (( QunicApp * )CQMainGetApp())->CQWinApp_GetHInst();

    // Get tooltip from resources
    int res = LoadString( ti.hinst, IDS_PREVIEW, string[99], RM_SCROLLTEXT_MAXLEN );

    ti.lpszText = string[99];

    // Set area
    ti.rect.left = 7;
    ti.rect.right = 104;
    ti.rect.top = 131;
    ti.rect.bottom = 145;

    // Associate the ToolTip with the "tool" window.
    SendMessage(hwndTT, TTM_ADDTOOL, 0, (LPARAM) (LPTOOLINFO) &ti);
}

Thanks,
Ilija

Answer 1

There are 3 kinds of tooltips. Your screenshot shows a tracking tooltip. Then there's a multiline tooltip, send TTM_SETMAXTIPWIDTH and respond to TTN_GETDISPINFO. And there are balloon tooltips, specify the TTS_BALLOON window style flag. The latter two fit your bill.

There are good code examples in the SDK article for them.

Answer 2

You can force the standard tooltip control to do multiline using the following trick:

In your TTN_NEEDTEXT handler:

// force multi-line tool tips
::SendMessage(pNMHDR->hwndFrom, TTM_SETMAXTIPWIDTH, 0, kToolTipWidth);

Regardless, by setting the width, then I'm able to draw muiltiline tips:

pToolTipText->lpszText = _T("blah blah blah\r\nmore blah blah\r\nline 3 of blah");

Where kToolTipWidth is some useful maximum width, say 600-800.

Strangely, I have to reissue this message in the TTN_NEEDTEXT handler, and not just at say window creation. This is true of our MFC application, where MFC uses a per-thread global tool tip control, which is probably reset to default values each time a new dialog is created. So It's just possible that for a non-MFC app you might be able to initialize it just once.

Enjoy!

Answer 3

Windows uses \\r\\n for line breaks. Try it instead, it should work. See MSDN .

Answer 4

I've found that \\n works for normal tooltips, but neither \\n nor \\r\\n works for balloon tooltips. I am not using Unicode.