зеркало из https://github.com/mozilla/gecko-dev.git
85 строки
3.0 KiB
C++
85 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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// CProgressListener.h
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#pragma once
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#include <LListener.h>
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class LCaption;
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class LBroadcaster;
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class CProgressCaption;
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//======================================
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class CProgressListener : public LListener
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//======================================
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{
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public:
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// We have three kinds of information displayed by the Progress Bar:
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// - graphical status level showing a percent value (msg_NSCProgressPercentChanged)
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// - text message showing a percent value (msg_NSCProgressUpdate)
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// - general purpose text message (msg_NSCProgressMessageChanged)
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//
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// The first two messages (those about the percent value) are always filtered
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// in order to avoid flickers generated by frequent updates.
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//
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// The last one is not filtered by default: it allows for instance
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// to keep track of the mouse cursor over an HTML page and display as fast
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// as possible the URLs corresponding to the links pointed by the cursor.
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//
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// The first level of laziness (lazy_JustABit) filters frequent updates of
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// the text messages and allows to go much faster when loading a mail.
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//
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// The second level of laziness (lazy_VeryButForThisCommandOnly) filters
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// the normal text messages and completely ignores the text messages showing
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// a percent value. It allows to go much faster when downloading news articles.
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// This mode is automatically reset to the previous one when the command has completed.
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//
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enum ProgressBarLaziness
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{
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lazy_NotAtAll = 1,
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// display all messages, still filter frequent refresh of the progress bar
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lazy_JustABit,
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// filter
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lazy_VeryButForThisCommandOnly
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};
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CProgressListener(CProgressCaption* progressCaption)
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: mProgressCaption(progressCaption) {}
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CProgressListener(LView* superview, LBroadcaster* broadcaster);
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// The broadcaster is the one to listen to.
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~CProgressListener();
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void ListenToMessage(MessageT inMessage, void *ioParam);
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void SetLaziness(ProgressBarLaziness inLaziness);
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protected:
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CProgressCaption* mProgressCaption;
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unsigned long mProgressLastTicks;
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unsigned long mMessageLastTicks;
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unsigned long mPercentLastTicks;
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ProgressBarLaziness mLaziness;
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ProgressBarLaziness mPreviousLaziness;
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}; // class ProgressListener
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