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annotate OrthancStone/Sources/Messages/ObserverBase.h @ 1721:d4a8e2b19a65

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new "GrayscaleWindowingChanged" message from GrayscaleWindowingSceneTracker
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 01 Dec 2020 12:51:57 +0100
parents 8563ea5d8ae4
children 9ac2a65d4172
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #pragma once
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24
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25 #include "ICallable.h"
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26 #include "IObserver.h"
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27 #include "IObservable.h"
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28
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29 #include <OrthancException.h>
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30
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31 #include <boost/enable_shared_from_this.hpp>
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32
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33 namespace OrthancStone
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34 {
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35 template <typename TObserver>
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36 class ObserverBase :
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37 public IObserver,
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38 public boost::enable_shared_from_this<TObserver>
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39 {
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40 public:
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41 boost::shared_ptr<TObserver> GetSharedObserver()
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42 {
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43 try
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44 {
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45 return this->shared_from_this();
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46 }
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47 catch (boost::bad_weak_ptr&)
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48 {
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49 throw Orthanc::OrthancException(
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50 Orthanc::ErrorCode_InternalError,
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51 "Cannot get a shared pointer to an observer from its constructor, "
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52 "or the observer is not created as a shared pointer");
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53 }
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54 }
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55
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56 template <typename TMessage>
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57 ICallable* CreateCallable(void (TObserver::* MemberMethod) (const TMessage&))
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58 {
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59 return new Callable<TObserver, TMessage>(GetSharedObserver(), MemberMethod);
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60 }
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61
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62 template <typename TMessage>
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63 void Register(IObservable& observable,
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64 void (TObserver::* MemberMethod) (const TMessage&))
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65 {
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66 observable.RegisterCallable(CreateCallable(MemberMethod));
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67 }
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68 };
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69 }