File indexing completed on 2024-05-19 11:38:34

0001 /*
0002     Large image displaying library.
0003 
0004     Copyright (C) 2004 Maks Orlovich (maksim@kde.org)
0005 
0006     Permission is hereby granted, free of charge, to any person obtaining a copy
0007     of this software and associated documentation files (the "Software"), to deal
0008     in the Software without restriction, including without limitation the rights
0009     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
0010     copies of the Software, and to permit persons to whom the Software is
0011     furnished to do so, subject to the following conditions:
0012 
0013     The above copyright notice and this permission notice shall be included in
0014     all copies or substantial portions of the Software.
0015 
0016     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0017     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0018     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
0019     AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
0020     AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
0021     CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
0022 
0023 */
0024 
0025 #ifndef UPDATER_H
0026 #define UPDATER_H
0027 
0028 #include <QObject>
0029 #include <QVector>
0030 
0031 class QTimer;
0032 
0033 namespace khtmlImLoad
0034 {
0035 
0036 class Image;
0037 
0038 /**
0039  The updater class helps manage timers, to permit update messages to be coalesced (so we don't
0040  bug KHTML, or whatever use every 5 pico-seconds.
0041 */
0042 class Updater: public QObject
0043 {
0044     Q_OBJECT
0045 public:
0046     Updater();
0047 
0048     /**
0049      The frames should call this function as they start having data to emit.
0050      The updater will call back their notifyPerformUpdate() function when a sufficient
0051      amount of time has passed.
0052      */
0053     void haveUpdates(Image *frame);
0054 
0055     /**
0056      Called by image when it's destroyed, and hence should be purged
0057      from the updates list
0058     */
0059     void destroyed(Image *frame);
0060 
0061 private Q_SLOTS:
0062     void pushUpdates();
0063 private:
0064     QTimer *updatePusher;
0065     bool updatesPending();
0066     QVector<Image *> frames[10];
0067     int             timePortion;
0068 };
0069 
0070 }
0071 
0072 #endif