docshell/base/nsITooltipListener.idl

   1 /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "nsISupports.idl"
   7
   8 /**
   9  * An optional interface for embedding clients wishing to receive
  10  * notifications for when a tooltip should be displayed or removed.
  11  * The embedder implements this interface on the web browser chrome
  12  * object associated with the window that notifications are required
  13  * for.
  14  *
  15  * @see nsITooltipTextProvider
  16  */
  17 [scriptable, uuid(44b78386-1dd2-11b2-9ad2-e4eee2ca1916)]
  18 interface nsITooltipListener : nsISupports
  19 {
  20     /**
  21      * Called when a tooltip should be displayed.
  22      *
  23      * @param aXCoords The tooltip left edge X coordinate.
  24      * @param aYCoords The tooltip top edge Y coordinate.
  25      * @param aTipText The text to display in the tooltip, typically obtained
  26      *        from the TITLE attribute of the node (or containing parent)
  27      *        over which the pointer has been positioned.
  28      * @param aTipDir  The direction (ltr or rtl) in which to display the text
  29      *
  30      * @note
  31      * Coordinates are specified in device pixels, relative to the top-left
  32      * corner of the browser area.
  33      *
  34      * @return <code>NS_OK</code> if the tooltip was displayed.
  35      */
  36     void onShowTooltip(in long aXCoords, in long aYCoords, in AString aTipText,
  37                        in AString aTipDir);
  38
  39     /**
  40      * Called when the tooltip should be hidden, either because the pointer
  41      * has moved or the tooltip has timed out.
  42      */
  43     void onHideTooltip();
  44 };