tooltips.c

winNT技术操作系统,国外开放的原代码和LIUX一样

        DrawTextW(hdc, infoPtr->pszTitle, -1, &rcTitle, DT_SINGLELINE | DT_NOPREFIX | DT_CALCRECT);
        SelectObject (hdc, hOldFont);
        title.cy = max(title.cy, rcTitle.bottom - rcTitle.top) + BALLOON_TITLE_TEXT_SPACING;
        title.cx += (rcTitle.right - rcTitle.left);
    }
    hOldFont = SelectObject (hdc, infoPtr->hFont);
    DrawTextW (hdc, infoPtr->szTipText, -1, &rc, uFlags);
    SelectObject (hdc, hOldFont);
    ReleaseDC (hwnd, hdc);

    if ((style & TTS_BALLOON) || infoPtr->pszTitle)
    {
        lpSize->cx = max(rc.right - rc.left, title.cx) + 2*BALLOON_TEXT_MARGIN +
                       infoPtr->rcMargin.left + infoPtr->rcMargin.right;
        lpSize->cy = title.cy + rc.bottom - rc.top + 2*BALLOON_TEXT_MARGIN +
                       infoPtr->rcMargin.bottom + infoPtr->rcMargin.top +
                       BALLOON_STEMHEIGHT;
    }
    else
    {
        lpSize->cx = rc.right - rc.left + 2*NORMAL_TEXT_MARGIN +
                       infoPtr->rcMargin.left + infoPtr->rcMargin.right;
        lpSize->cy = rc.bottom - rc.top + 2*NORMAL_TEXT_MARGIN +
                       infoPtr->rcMargin.bottom + infoPtr->rcMargin.top;
    }
}


static void
TOOLTIPS_Show (HWND hwnd, TOOLTIPS_INFO *infoPtr)
{
    TTTOOL_INFO *toolPtr;
    HMONITOR monitor;
    MONITORINFO mon_info;
    RECT rect;
    SIZE size;
    NMHDR  hdr;
    int ptfx = 0;
    DWORD style = GetWindowLongW(hwnd, GWL_STYLE);

    if (infoPtr->nTool == -1) {
	TRACE("invalid tool (-1)!\n");
	return;
    }

    infoPtr->nCurrentTool = infoPtr->nTool;

    TRACE("Show tooltip pre %d! (%p)\n", infoPtr->nTool, hwnd);

    TOOLTIPS_GetTipText (hwnd, infoPtr, infoPtr->nCurrentTool);

    if (infoPtr->szTipText[0] == L'\0') {
	infoPtr->nCurrentTool = -1;
	return;
    }

    TRACE("Show tooltip %d!\n", infoPtr->nCurrentTool);
    toolPtr = &infoPtr->tools[infoPtr->nCurrentTool];

    hdr.hwndFrom = hwnd;
    hdr.idFrom = toolPtr->uId;
    hdr.code = TTN_SHOW;
    SendMessageW (toolPtr->hwnd, WM_NOTIFY,
		    (WPARAM)toolPtr->uId, (LPARAM)&hdr);

    TRACE("%s\n", debugstr_w(infoPtr->szTipText));

    TOOLTIPS_CalcTipSize (hwnd, infoPtr, &size);
    TRACE("size %d x %d\n", size.cx, size.cy);

    if (toolPtr->uFlags & TTF_CENTERTIP) {
	RECT rc;

	if (toolPtr->uFlags & TTF_IDISHWND)
	    GetWindowRect ((HWND)toolPtr->uId, &rc);
	else {
	    rc = toolPtr->rect;
	    MapWindowPoints (toolPtr->hwnd, NULL, (LPPOINT)&rc, 2);
	}
	rect.left = (rc.left + rc.right - size.cx) / 2;
	if (style & TTS_BALLOON)
	{
          ptfx = rc.left + ((rc.right - rc.left) / 2);
          if(rect.top - size.cy >= 0)
          {
            rect.top -= size.cy;
            infoPtr->bToolBelow = FALSE;
          }
          else
          {
            infoPtr->bToolBelow = TRUE;
            rect.top += 20;
          }
          rect.left = max(0, rect.left - BALLOON_STEMINDENT);
        }
        else
        {
          rect.top  = rc.bottom + 2;
          infoPtr->bToolBelow = TRUE;
        }
    }
    else {
	GetCursorPos ((LPPOINT)&rect);
	if (style & TTS_BALLOON)
	{
            ptfx = rect.left;
            if(rect.top - size.cy >= 0)
            {
              rect.top -= size.cy;
              infoPtr->bToolBelow = FALSE;
            }
            else
            {
              infoPtr->bToolBelow = TRUE;
              rect.top += 20;
            }
            rect.left = max(0, rect.left - BALLOON_STEMINDENT);
        }
        else
        {
	    rect.top += 20;
	    infoPtr->bToolBelow = TRUE;
        }
    }

    TRACE("pos %d - %d\n", rect.left, rect.top);

    rect.right = rect.left + size.cx;
    rect.bottom = rect.top + size.cy;

    /* check position */

    monitor = MonitorFromRect( &rect, MONITOR_DEFAULTTOPRIMARY );
    mon_info.cbSize = sizeof(mon_info);
    GetMonitorInfoW( monitor, &mon_info );

    if( rect.right > mon_info.rcWork.right ) {
        rect.left -= rect.right - mon_info.rcWork.right + 2;
        rect.right = mon_info.rcWork.right - 2;
    }
    if (rect.left < mon_info.rcWork.left) rect.left = mon_info.rcWork.left;

    if( rect.bottom > mon_info.rcWork.bottom ) {
        RECT rc;

	if (toolPtr->uFlags & TTF_IDISHWND)
	    GetWindowRect ((HWND)toolPtr->uId, &rc);
	else {
	    rc = toolPtr->rect;
	    MapWindowPoints (toolPtr->hwnd, NULL, (LPPOINT)&rc, 2);
	}
	rect.bottom = rc.top - 2;
    	rect.top = rect.bottom - size.cy;
    }

    AdjustWindowRectEx (&rect, GetWindowLongW (hwnd, GWL_STYLE),
			FALSE, GetWindowLongW (hwnd, GWL_EXSTYLE));

    if (style & TTS_BALLOON)
    {
        HRGN hRgn;
        HRGN hrStem;
        POINT pts[3];

        ptfx -= rect.left;

        if(infoPtr->bToolBelow)
        {
          pts[0].x = ptfx;
          pts[0].y = 0;
          pts[1].x = max(BALLOON_STEMINDENT, ptfx - (BALLOON_STEMWIDTH / 2));
          pts[1].y = BALLOON_STEMHEIGHT;
          pts[2].x = pts[1].x + BALLOON_STEMWIDTH;
          pts[2].y = pts[1].y;
          if(pts[2].x > (rect.right - rect.left) - BALLOON_STEMINDENT)
          {
            pts[2].x = (rect.right - rect.left) - BALLOON_STEMINDENT;
            pts[1].x = pts[2].x - BALLOON_STEMWIDTH;
          }
        }
        else
        {
          pts[0].x = max(BALLOON_STEMINDENT, ptfx - (BALLOON_STEMWIDTH / 2));
          pts[0].y = (rect.bottom - rect.top) - BALLOON_STEMHEIGHT;
          pts[1].x = pts[0].x + BALLOON_STEMWIDTH;
          pts[1].y = pts[0].y;
          pts[2].x = ptfx;
          pts[2].y = (rect.bottom - rect.top);
          if(pts[1].x > (rect.right - rect.left) - BALLOON_STEMINDENT)
          {
            pts[1].x = (rect.right - rect.left) - BALLOON_STEMINDENT;
            pts[0].x = pts[1].x - BALLOON_STEMWIDTH;
          }
        }

        hrStem = CreatePolygonRgn(pts, sizeof(pts) / sizeof(pts[0]), ALTERNATE);
        
        hRgn = CreateRoundRectRgn(0,
                                  (infoPtr->bToolBelow ? BALLOON_STEMHEIGHT : 0),
                                  rect.right - rect.left,
                                  (infoPtr->bToolBelow ? rect.bottom - rect.top : rect.bottom - rect.top - BALLOON_STEMHEIGHT),
                                  BALLOON_ROUNDEDNESS, BALLOON_ROUNDEDNESS);

        CombineRgn(hRgn, hRgn, hrStem, RGN_OR);
        DeleteObject(hrStem);

        SetWindowRgn(hwnd, hRgn, FALSE);
        /* we don't free the region handle as the system deletes it when 
         * it is no longer needed */
    }

    SetWindowPos (hwnd, HWND_TOP, rect.left, rect.top,
		    rect.right - rect.left, rect.bottom - rect.top,
		    SWP_SHOWWINDOW | SWP_NOACTIVATE);

    /* repaint the tooltip */
    InvalidateRect(hwnd, NULL, TRUE);
    UpdateWindow(hwnd);

    SetTimer (hwnd, ID_TIMERPOP, infoPtr->nAutoPopTime, 0);
    TRACE("timer 2 started!\n");
    SetTimer (hwnd, ID_TIMERLEAVE, infoPtr->nReshowTime, 0);
    TRACE("timer 3 started!\n");
}


static void
TOOLTIPS_Hide (HWND hwnd, TOOLTIPS_INFO *infoPtr)
{
    TTTOOL_INFO *toolPtr;
    NMHDR hdr;

    TRACE("Hide tooltip %d! (%p)\n", infoPtr->nCurrentTool, hwnd);

    if (infoPtr->nCurrentTool == -1)
	return;

    toolPtr = &infoPtr->tools[infoPtr->nCurrentTool];
    KillTimer (hwnd, ID_TIMERPOP);

    hdr.hwndFrom = hwnd;
    hdr.idFrom = toolPtr->uId;
    hdr.code = TTN_POP;
    SendMessageW (toolPtr->hwnd, WM_NOTIFY,
		    (WPARAM)toolPtr->uId, (LPARAM)&hdr);

    infoPtr->nCurrentTool = -1;

    SetWindowPos (hwnd, HWND_TOP, 0, 0, 0, 0,
		    SWP_NOZORDER | SWP_HIDEWINDOW | SWP_NOACTIVATE);
}


static void
TOOLTIPS_TrackShow (HWND hwnd, TOOLTIPS_INFO *infoPtr)
{
    TTTOOL_INFO *toolPtr;
    RECT rect;
    SIZE size;
    NMHDR hdr;

    if (infoPtr->nTrackTool == -1) {
	TRACE("invalid tracking tool (-1)!\n");
	return;
    }

    TRACE("show tracking tooltip pre %d!\n", infoPtr->nTrackTool);

    TOOLTIPS_GetTipText (hwnd, infoPtr, infoPtr->nTrackTool);

    if (infoPtr->szTipText[0] == L'\0') {
	infoPtr->nTrackTool = -1;
	return;
    }

    TRACE("show tracking tooltip %d!\n", infoPtr->nTrackTool);
    toolPtr = &infoPtr->tools[infoPtr->nTrackTool];

    hdr.hwndFrom = hwnd;
    hdr.idFrom = toolPtr->uId;
    hdr.code = TTN_SHOW;
    SendMessageW (toolPtr->hwnd, WM_NOTIFY,
		    (WPARAM)toolPtr->uId, (LPARAM)&hdr);

    TRACE("%s\n", debugstr_w(infoPtr->szTipText));

    TOOLTIPS_CalcTipSize (hwnd, infoPtr, &size);
    TRACE("size %d x %d\n", size.cx, size.cy);

    if (toolPtr->uFlags & TTF_ABSOLUTE) {
	rect.left = infoPtr->xTrackPos;
	rect.top  = infoPtr->yTrackPos;

	if (toolPtr->uFlags & TTF_CENTERTIP) {
	    rect.left -= (size.cx / 2);
	    rect.top  -= (size.cy / 2);
	}
    }
    else {
	RECT rcTool;

	if (toolPtr->uFlags & TTF_IDISHWND)
	    GetWindowRect ((HWND)toolPtr->uId, &rcTool);
	else {
	    rcTool = toolPtr->rect;
	    MapWindowPoints (toolPtr->hwnd, NULL, (LPPOINT)&rcTool, 2);
	}

	GetCursorPos ((LPPOINT)&rect);
	rect.top += 20;

	if (toolPtr->uFlags & TTF_CENTERTIP) {
	    rect.left -= (size.cx / 2);
	    rect.top  -= (size.cy / 2);
	}

	/* smart placement */
	if ((rect.left + size.cx > rcTool.left) && (rect.left < rcTool.right) &&
	    (rect.top + size.cy > rcTool.top) && (rect.top < rcTool.bottom))
	    rect.left = rcTool.right;
    }

    TRACE("pos %d - %d\n", rect.left, rect.top);

    rect.right = rect.left + size.cx;
    rect.bottom = rect.top + size.cy;

    AdjustWindowRectEx (&rect, GetWindowLongW (hwnd, GWL_STYLE),
			FALSE, GetWindowLongW (hwnd, GWL_EXSTYLE));

    if (GetWindowLongW(hwnd, GWL_STYLE) & TTS_BALLOON)
    {
        HRGN hRgn;

        /* FIXME: need to add pointy bit using CreatePolyRgn & CombinRgn */
        hRgn = CreateRoundRectRgn(0, 0, rect.right - rect.left, rect.bottom - rect.top, BALLOON_ROUNDEDNESS, BALLOON_ROUNDEDNESS);

        SetWindowRgn(hwnd, hRgn, FALSE);
        /* we don't free the region handle as the system deletes it when 
         * it is no longer needed */
    }

    SetWindowPos (hwnd, HWND_TOP, rect.left, rect.top,
		    rect.right - rect.left, rect.bottom - rect.top,
		    SWP_SHOWWINDOW | SWP_NOACTIVATE );

    InvalidateRect(hwnd, NULL, TRUE);
    UpdateWindow(hwnd);
}


static void
TOOLTIPS_TrackHide (HWND hwnd, TOOLTIPS_INFO *infoPtr)
{
    TTTOOL_INFO *toolPtr;
    NMHDR hdr;

    TRACE("hide tracking tooltip %d\n", infoPtr->nTrackTool);

    if (infoPtr->nTrackTool == -1)
	return;

    toolPtr = &infoPtr->tools[infoPtr->nTrackTool];

    hdr.hwndFrom = hwnd;
    hdr.idFrom = toolPtr->uId;
    hdr.code = TTN_POP;
    SendMessageW (toolPtr->hwnd, WM_NOTIFY,
		    (WPARAM)toolPtr->uId, (LPARAM)&hdr);

    SetWindowPos (hwnd, HWND_TOP, 0, 0, 0, 0,
		    SWP_NOZORDER | SWP_HIDEWINDOW | SWP_NOACTIVATE);
}


static INT
TOOLTIPS_GetToolFromInfoA (TOOLTIPS_INFO *infoPtr, LPTTTOOLINFOA lpToolInfo)
{
    TTTOOL_INFO *toolPtr;
    INT nTool;

    for (nTool = 0; nTool < infoPtr->uNumTools; nTool++) {
	toolPtr = &infoPtr->tools[nTool];

	if (!(toolPtr->uFlags & TTF_IDISHWND) &&
	    (lpToolInfo->hwnd == toolPtr->hwnd) &&
	    (lpToolInfo->uId == toolPtr->uId))
	    return nTool;
    }

    for (nTool = 0; nTool < infoPtr->uNumTools; nTool++) {
	toolPtr = &infoPtr->tools[nTool];

	if ((toolPtr->uFlags & TTF_IDISHWND) &&
	    (lpToolInfo->uId == toolPtr->uId))
	    return nTool;
    }

    return -1;
}


static INT
TOOLTIPS_GetToolFromInfoW (TOOLTIPS_INFO *infoPtr, LPTTTOOLINFOW lpToolInfo)
{
    TTTOOL_INFO *toolPtr;
    INT nTool;

    for (nTool = 0; nTool < infoPtr->uNumTools; nTool++) {
	toolPtr = &infoPtr->tools[nTool];

	if (!(toolPtr->uFlags & TTF_IDISHWND) &&
	    (lpToolInfo->hwnd == toolPtr->hwnd) &&
	    (lpToolInfo->uId == toolPtr->uId))
	    return nTool;
    }

    for (nTool = 0; nTool < infoPtr->uNumTools; nTool++) {
	toolPtr = &infoPtr->tools[nTool];

	if ((toolPtr->uFlags & TTF_IDISHWND) &&
	    (lpToolInfo->uId == toolPtr->uId))
	    return nTool;
    }

    return -1;
}


static INT
TOOLTIPS_GetToolFromPoint (TOOLTIPS_INFO *infoPtr, HWND hwnd, LPPOINT lpPt)
{
    TTTOOL_INFO *toolPtr;
    INT  nTool;

    for (nTool = 0; nTool < infoPtr->uNumTools; nTool++) {
	toolPtr = &infoPtr->tools[nTool];

	if (!(toolPtr->uFlags & TTF_IDISHWND)) {
	    if (hwnd != toolPtr->hwnd)
		continue;
	    if (!PtInRect (&toolPtr->rect, *lpPt))
		continue;
	    return nTool;
	}
    }

    for (nTool = 0; nTool < infoPtr->uNumTools; nTool++) {
	toolPtr = &infoPtr->tools[nTool];

	if (toolPtr->uFlags & TTF_IDISHWND) {
	    if ((HWND)toolPtr->uId == hwnd)
		return nTool;
	}
    }

    return -1;
}


static BOOL
TOOLTIPS_IsWindowActive (HWND hwnd)
{
    HWND hwndActive = GetActiveWindow ();
    if (!hwndActive)
	return FALSE;