Mercurial > dillo_port1.3
annotate lout/signal.cc @ 2048:5060d415a85a
clickable menu items (even those introducing submenus) MUST have callbacks
I clicked on the "Panel size" item itself instead of any of the
options in its submenu, and: Segfault!
| author | corvid <corvid@lavabit.com> |
|---|---|
| date | Thu, 26 May 2011 02:51:18 +0000 |
| parents | d7dbd3dcfa38 |
| children |
| rev | line source |
|---|---|
| 347 | 1 /* |
| 2 * Dillo Widget | |
| 3 * | |
| 4 * Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org> | |
| 5 * | |
| 6 * This program is free software; you can redistribute it and/or modify | |
| 7 * it under the terms of the GNU General Public License as published by | |
| 8 * the Free Software Foundation; either version 3 of the License, or | |
| 9 * (at your option) any later version. | |
| 10 * | |
| 11 * This program is distributed in the hope that it will be useful, | |
| 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 * GNU General Public License for more details. | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License | |
|
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Detlef Riekenberg <wine.dev@web.de>
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 347 | 18 */ |
| 19 | |
| 20 | |
| 21 | |
| 22 #include "signal.hh" | |
| 23 | |
| 24 namespace lout { | |
| 25 namespace signal { | |
| 26 | |
| 27 using namespace container::typed; | |
| 28 | |
| 29 // ------------ | |
| 30 // Emitter | |
| 31 // ------------ | |
| 32 | |
| 33 Emitter::Emitter () | |
| 34 { | |
| 35 receivers = new List <Receiver> (false); | |
| 36 } | |
| 37 | |
| 38 Emitter::~Emitter () | |
| 39 { | |
|
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's/if(/if (/g' 's/for(/for (/g' 's/while(/while (/g', and indentation.
Jorge Arellano Cid <jcid@dillo.org>
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40 for (Iterator<Receiver> it = receivers->iterator (); it.hasNext (); ) { |
| 347 | 41 Receiver *receiver = it.getNext (); |
| 42 receiver->unconnectFrom (this); | |
| 43 } | |
| 44 delete receivers; | |
| 45 } | |
| 46 | |
| 47 void Emitter::intoStringBuffer(misc::StringBuffer *sb) | |
| 48 { | |
| 49 sb->append ("<emitter: "); | |
| 50 receivers->intoStringBuffer (sb); | |
| 51 sb->append (">"); | |
| 52 } | |
| 53 | |
| 54 void Emitter::unconnect (Receiver *receiver) | |
| 55 { | |
| 56 receivers->removeRef (receiver); | |
| 57 } | |
| 58 | |
| 59 /** | |
| 60 * \brief Connect a receiver to the emitter. | |
| 61 * | |
| 62 * This is protected, a sub class should define a wrapper, with the respective | |
| 63 * receiver as an argument, to gain type safety. | |
| 64 */ | |
| 65 void Emitter::connect (Receiver *receiver) | |
| 66 { | |
| 67 receivers->append (receiver); | |
| 68 receiver->connectTo (this); | |
| 69 } | |
| 70 | |
| 71 /** | |
| 72 * \brief Emit a void signal. | |
| 73 * | |
| 74 * This method should be called by a wrapper (return value void), which | |
| 75 * \em folds the signal, and delegates the emission to here. | |
| 76 */ | |
| 77 void Emitter::emitVoid (int signalNo, int argc, Object **argv) | |
| 78 { | |
|
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's/if(/if (/g' 's/for(/for (/g' 's/while(/while (/g', and indentation.
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79 for (Iterator <Receiver> it = receivers->iterator (); it.hasNext (); ) { |
| 347 | 80 Receiver *receiver = it.getNext(); |
| 81 emitToReceiver (receiver, signalNo, argc, argv); | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 /** | |
| 86 * \brief Emit a boolean signal. | |
| 87 * | |
| 88 * This method should be called by a wrapper, which \em folds the signal, | |
| 89 * delegates the emission to here, and returns the same boolean value. | |
| 90 */ | |
| 91 bool Emitter::emitBool (int signalNo, int argc, Object **argv) | |
| 92 { | |
| 93 bool b = false, bt; | |
| 94 | |
|
928
7771cf243ca6
's/if(/if (/g' 's/for(/for (/g' 's/while(/while (/g', and indentation.
Jorge Arellano Cid <jcid@dillo.org>
parents:
347
diff
changeset
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95 for (Iterator <Receiver> it = receivers->iterator (); it.hasNext (); ) { |
| 347 | 96 Receiver *receiver = it.getNext(); |
| 97 // Note: All receivers are called, even if one returns true. | |
| 98 // Therefore, something like | |
| 99 // b = b || emitToReceiver (receiver, signalNo, argc, argv); | |
| 100 // does not work. | |
| 101 bt = emitToReceiver (receiver, signalNo, argc, argv); | |
| 102 b = b || bt; | |
| 103 } | |
| 104 | |
| 105 return b; | |
| 106 } | |
| 107 | |
| 108 | |
| 109 // -------------- | |
| 110 // Receiver | |
| 111 // -------------- | |
| 112 | |
| 113 Receiver::Receiver() | |
| 114 { | |
| 115 emitters = new List <Emitter> (false); | |
| 116 } | |
| 117 | |
| 118 Receiver::~Receiver() | |
| 119 { | |
|
928
7771cf243ca6
's/if(/if (/g' 's/for(/for (/g' 's/while(/while (/g', and indentation.
Jorge Arellano Cid <jcid@dillo.org>
parents:
347
diff
changeset
|
120 for (Iterator<Emitter> it = emitters->iterator(); it.hasNext(); ) { |
| 347 | 121 Emitter *emitter = it.getNext(); |
| 122 emitter->unconnect (this); | |
| 123 } | |
| 124 delete emitters; | |
| 125 } | |
| 126 | |
| 127 void Receiver::intoStringBuffer(misc::StringBuffer *sb) | |
| 128 { | |
| 129 // emitters are not listed, to prevent recursion | |
| 130 sb->append ("<receiver>"); | |
| 131 } | |
| 132 | |
| 133 void Receiver::connectTo(Emitter *emitter) | |
| 134 { | |
| 135 emitters->append (emitter); | |
| 136 } | |
| 137 | |
| 138 void Receiver::unconnectFrom(Emitter *emitter) | |
| 139 { | |
| 140 emitters->removeRef (emitter); | |
| 141 } | |
| 142 | |
| 143 // ------------------------ | |
| 144 // ObservedObject | |
| 145 // ------------------------ | |
| 146 | |
| 147 bool ObservedObject::DeletionEmitter::emitToReceiver (Receiver *receiver, | |
| 148 int signalNo, | |
| 149 int argc, Object **argv) | |
| 150 { | |
| 151 object::TypedPointer <ObservedObject> *p = | |
| 152 (object::TypedPointer<ObservedObject>*)argv[0]; | |
| 153 ((DeletionReceiver*)receiver)->deleted (p->getTypedValue ()); | |
| 154 return false; | |
| 155 } | |
| 156 | |
| 157 void ObservedObject::DeletionEmitter::emitDeletion (ObservedObject *obj) | |
| 158 { | |
| 159 object::TypedPointer <ObservedObject> p(obj); | |
| 160 object::Object *argv[1] = { &p }; | |
| 161 emitVoid (0, 1, argv); | |
| 162 } | |
| 163 | |
| 164 ObservedObject::~ObservedObject() | |
| 165 { | |
| 166 deletionEmitter.emitDeletion (this); | |
| 167 } | |
| 168 | |
| 169 } // namespace signal | |
| 170 } // namespace lout |