ground/gcs/src/libs/gstreamer/videowidget.h

   1 /**
   2  ******************************************************************************
   3  *
   4  * @file       videogadgetwidget.h
   5  * @author     The LibrePilot Project, http://www.librepilot.org Copyright (C) 2017.
   6  * @brief
   7  * @see        The GNU Public License (GPL) Version 3
   8  * @defgroup
   9  * @{
  10  *
  11  *****************************************************************************/
  12 /*
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 3 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful, but
  19  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  20  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  21  * for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License along
  24  * with this program; if not, write to the Free Software Foundation, Inc.,
  25  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26  */
  27 #ifndef VIDEOWIDGET_H_
  28 #define VIDEOWIDGET_H_
  29
  30 #include "gst_global.h"
  31 #include "pipeline.h"
  32 #include "overlay.h"
  33
  34 #include <QWidget>
  35 #include <QResizeEvent>
  36 #include <QPaintEvent>
  37 #include <QMouseEvent>
  38
  39 typedef struct _GstElement GstElement;
  40
  41 class BusSyncHandler;
  42
  43 class GST_LIB_EXPORT VideoWidget : public QWidget {
  44     Q_OBJECT
  45
  46 public:
  47     VideoWidget(QWidget *parent = 0);
  48     ~VideoWidget();
  49
  50     QString pipelineDesc();
  51     void setPipelineDesc(QString pipelineDesc);
  52     bool isPlaying();
  53
  54 public slots:
  55     void start();
  56     void pause();
  57     void stop();
  58
  59 signals:
  60     void message(QString);
  61     void stateChanged(Pipeline::State oldState, Pipeline::State newState, Pipeline::State pendingState);
  62
  63 protected:
  64     QString getStatus();
  65     QString getStatusMessage();
  66     void paintStatus(QPaintEvent *);
  67     // QWidget overrides
  68     void paintEvent(QPaintEvent *);
  69     void resizeEvent(QResizeEvent *);
  70     void mouseDoubleClickEvent(QMouseEvent *);
  71
  72 private:
  73     void init();
  74     void dispose();
  75     void setOverlay(Overlay *);
  76
  77     void emitEventMessage(QString msg);
  78
  79     void toDotFile(QString name);
  80
  81     // QWidget overrides
  82     bool event(QEvent *);
  83     QPaintEngine *paintEngine() const;
  84
  85     QString m_pipelineDesc;
  86     QString lastError;
  87     GstElement *pipeline;
  88     Overlay *overlay;
  89     BusSyncHandler *handler;
  90
  91     // DeviceMonitor m;
  92 };
  93
  94 #endif /* VIDEOWIDGET_H_ */