Mercurial > octave-nkf
annotate libgui/graphics/GenericEventNotify.h @ 20038:f0e61a67ad9f
Update copyright year in Qt graphics code.
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 20 Mar 2015 16:18:10 -0400 |
parents | dbb207d10d7c |
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1 /* |
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2 |
20038
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3 Copyright (C) 2011-2015 Michael Goffioul |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 3 of the License, or (at your |
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10 option) any later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. 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 #ifndef __GenericEventNotify_h__ |
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24 #define __GenericEventNotify_h__ 1 |
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25 |
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26 #include <QSet> |
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27 |
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28 class QEvent; |
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29 class QObject; |
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30 class QWidget; |
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31 |
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32 namespace QtHandles |
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33 { |
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34 |
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35 class GenericEventNotifyReceiver; |
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36 |
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37 class GenericEventNotifySender |
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38 { |
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39 public: |
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40 GenericEventNotifySender (void) : m_receivers () { } |
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41 virtual ~GenericEventNotifySender (void) { } |
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42 |
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43 void addReceiver (GenericEventNotifyReceiver* r) |
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44 { m_receivers.insert (r); } |
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45 |
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46 void removeReceiver (GenericEventNotifyReceiver* r) |
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47 { m_receivers.remove (r); } |
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48 |
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49 protected: |
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50 bool notifyReceiversBefore (QObject* obj, QEvent* evt); |
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51 void notifyReceiversAfter (QObject* obj, QEvent* evt); |
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52 |
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53 private: |
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54 QSet<GenericEventNotifyReceiver*> m_receivers; |
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55 }; |
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56 |
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57 class GenericEventNotifyReceiver |
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58 { |
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59 public: |
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60 GenericEventNotifyReceiver (void) { } |
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61 virtual ~GenericEventNotifyReceiver (void) { } |
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62 |
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63 virtual bool eventNotifyBefore (QObject* obj, QEvent* evt) = 0; |
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64 virtual void eventNotifyAfter (QObject* obj, QEvent* evt) = 0; |
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65 }; |
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66 |
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67 inline |
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68 bool GenericEventNotifySender::notifyReceiversBefore (QObject* obj, |
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69 QEvent* evt) |
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70 { |
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71 foreach (GenericEventNotifyReceiver* r, m_receivers) |
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72 if (r->eventNotifyBefore (obj, evt)) |
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73 return true; |
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74 return false; |
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75 } |
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76 |
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77 inline |
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78 void GenericEventNotifySender::notifyReceiversAfter (QObject* obj, |
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79 QEvent* evt) |
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80 { |
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81 foreach (GenericEventNotifyReceiver* r, m_receivers) |
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82 r->eventNotifyAfter (obj, evt); |
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83 } |
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84 |
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85 #define DECLARE_GENERICEVENTNOTIFY_SENDER(T,B) \ |
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86 class T : public B, public GenericEventNotifySender \ |
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87 { \ |
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88 public: \ |
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89 T (QWidget* xparent) : B (xparent), GenericEventNotifySender () { } \ |
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90 ~ T (void) { } \ |
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91 \ |
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92 bool event (QEvent* evt) \ |
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93 { \ |
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94 bool result = true; \ |
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95 if (! notifyReceiversBefore (this, evt)) \ |
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96 result = B::event (evt); \ |
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97 notifyReceiversAfter (this, evt); \ |
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98 return result; \ |
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99 } \ |
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100 } |
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101 |
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102 }; |
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103 |
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104 #endif |