ImageHandler.h Example File

 /*
  * Copyright 2011 QZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #ifndef IMAGEHANDLER_H
 #define IMAGEHANDLER_H

 #include <QObject>
 #include <QImage>
 #if QT_VERSION >= 0x050000
 #include <QSet>
 #include <QReadWriteLock>
 #endif

 class ImageHandler : public QObject
 {
     Q_OBJECT
 public:
     explicit ImageHandler(QObject *parent = 0);

     QImage extractQImage(QObject *imageObj,
                          int offsetX = 0, int offsetY = 0,
                          int width = 0, int height = 0);

 public slots:
     void save(QObject *item, const QString &path,
               const int offsetX = 0, const int offsetY = 0,
               const int width = 0, const int height = 0);
 private:
 #if QT_VERSION >= 0x050000
     void imageGrabberReady();
     QSet<QObject *> pendingGrabbers;
     QReadWriteLock pendingGrabbersLocker;
 #endif
 };

 #endif // IMAGEHANDLER_H