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PlotMSDrawThread.qo.h
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00001 //# PlotMSDrawThread.qo.h: Subclass of PlotMSThread for drawing.
00002 //# Copyright (C) 2009
00003 //# Associated Universities, Inc. Washington DC, USA.
00004 //#
00005 //# This library is free software; you can redistribute it and/or modify it
00006 //# under the terms of the GNU Library General Public License as published by
00007 //# the Free Software Foundation; either version 2 of the License, or (at your
00008 //# option) any later version.
00009 //#
00010 //# This library is distributed in the hope that it will be useful, but WITHOUT
00011 //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00012 //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00013 //# License for more details.
00014 //#
00015 //# You should have received a copy of the GNU Library General Public License
00016 //# along with this library; if not, write to the Free Software Foundation,
00017 //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
00018 //#
00019 //# Correspondence concerning AIPS++ should be addressed as follows:
00020 //#        Internet email: aips2-request@nrao.edu.
00021 //#        Postal address: AIPS++ Project Office
00022 //#                        National Radio Astronomy Observatory
00023 //#                        520 Edgemont Road
00024 //#                        Charlottesville, VA 22903-2475 USA
00025 //#
00026 //# $Id: $
00027 #ifndef PLOTMSDRAWTHREAD_QO_H_
00028 #define PLOTMSDRAWTHREAD_QO_H_
00029 
00030 #include <plotms/Actions/PlotMSThread.qo.h>
00031 
00032 #include <vector>
00033 
00034 #include <casa/namespace.h>
00035 
00036 namespace casa {
00037 
00038 //# Forward Declarations
00039 class PlotMSPlotter;
00040 
00041 // Subclass of PlotMSThread that handles following the progress of canvas
00042 // drawing.
00043 class PlotMSDrawThread : public PlotMSThread, public PlotOperationWatcher {
00044     Q_OBJECT
00045     
00046 public:
00047     // Constructor which takes the plotter, and optional post-thread method
00048     // parameters.
00049     PlotMSDrawThread(PlotMSPlotter* plotter,
00050             PMSPTMethod postThreadMethod = NULL,
00051             PMSPTObject postThreadObject = NULL);
00052     
00053     // Destructor.
00054     ~PlotMSDrawThread();
00055     
00056     
00057     // Updates the internal list of canvases based upon the parent
00058     // PlotMSPlotter.
00059     void updatePlotterCanvases();
00060     
00061     // Implements PlotMSThread::startOperation().
00062     void startOperation();
00063     
00064     bool isDrawing() const;
00065 
00066     // Implements PlotOperationWatcher::operationChanged().
00067     void operationChanged(const PlotOperation& operation);
00068     
00069 protected:
00070     // Implements PlotMSThread::wasCanceled().
00071     bool wasCanceled() const;
00072     
00073 protected slots:
00074     // Implements PlotMSThread::background().  Currently is unimplemented.
00075     void background();
00076     
00077     // Implements PlotMSThread::pause().  Currently is unimplemented.
00078     void pause();
00079     
00080     // Implements PlotMSThread::resume().  Currently is unimplemented.
00081     void resume();
00082     
00083     // Implements PlotMSThread::cancel().  Currently is unimplemented.
00084     void cancel();
00085     
00086 private:
00087     // Parent plotter.
00088     PlotMSPlotter* itsPlotter_;
00089     
00090     // Operations.
00091     vector<PlotOperationPtr> itsOperations_;
00092     
00093     // Mutex for accessing operations.
00094     QMutex itsOperationsMutex_;
00095     
00096     // Flag for if thread is currently running or not.
00097     bool isRunning_;
00098     
00099     // Flag indicating that one or more operations tried to call
00100     // operationChanged() while the operations mutex was locked.
00101     bool itsOperationFlag_;
00102     
00103     // Flag for whether thread was canceled or not.
00104     bool wasCanceled_;
00105 };
00106 
00107 }
00108 
00109 #endif /* PLOTMSDRAWTHREAD_QO_H_ */