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106 lines
3.7 KiB
C++
106 lines
3.7 KiB
C++
/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef WatchTask_h__
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#define WatchTask_h__
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#ifndef XP_MACOSX
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#include <Retrace.h>
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#endif
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#include <Quickdraw.h>
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#include "prtypes.h"
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#include "gfxCore.h"
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//
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// class nsWatchTask
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//
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// A nice little class that installs/removes a VBL to set the cursor to
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// the watch if we're away from the event loop for a while. Will also
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// animate the watch cursor.
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//
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class nsWatchTask
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{
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public:
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nsWatchTask ( ) ;
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~nsWatchTask ( ) ;
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// Registers the VBL task and does other various init tasks to begin
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// watching for time away from the event loop. It is ok to call other
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// methods on this object w/out calling Start().
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NS_GFX void Start ( ) ;
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// call from the main event loop
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NS_GFX void EventLoopReached ( ) ;
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// turn off when we know we're going into an area where it's ok
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// that WNE is not called (eg, the menu code)
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void Suspend ( ) { mSuspended = PR_TRUE; };
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void Resume ( ) { mSuspended = PR_FALSE; };
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static NS_GFX nsWatchTask& GetTask ( ) ;
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private:
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enum {
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kRepeatInterval = 10, // check every 1/6 of a second if we should show watch (10/60)
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kTicksToShowWatch = 45, // show watch if haven't seen WNE for 3/4 second (45/60)
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kStepsInAnimation = 12
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};
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// the VBL task
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static pascal void DoWatchTask(nsWatchTask* theTaskPtr) ;
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#if !TARGET_CARBON
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VBLTask mTask; // this must be first!!
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#endif
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long mChecksum; // 'mozz' to validate we have real data at interrupt time (not needed?)
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void* mSelf; // so we can get back to |this| from the static routine
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long mTicks; // last time the event loop was hit
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Cursor mWatchCursor; // the watch cursor
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PRPackedBool mBusy; // are we currently spinning the cursor?
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PRPackedBool mSuspended; // set if we've temporarily suspended operation
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PRPackedBool mInstallSucceeded; // did we succeed in installing the task? (used in dtor)
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short mAnimation; // stage of animation
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};
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#endif
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