88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef NUVIE_MISC_CALLBACK_H
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#define NUVIE_MISC_CALLBACK_H
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#include "ultima/nuvie/core/nuvie_defs.h"
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namespace Ultima {
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namespace Nuvie {
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class CallBack;
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// general messages
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typedef enum {
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CB_TIMED, /* timer fired (data=uint32:time) */
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ANIM_CB_DONE, /* animation has finished */
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ANIM_CB_HIT, /* animation hit a MapEntity (data=MapEntity) */
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ANIM_CB_HIT_WORLD, /* animation hit some other tile on the map (data=MapCoord) */
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EFFECT_CB_COMPLETE, /* effect has finished */
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CB_DATA_READY, /* some data is ready to be retrieved (data=char)*/
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MSGSCROLL_CB_TEXT_READY, /* text is ready to be retrieved (data=Std::string)*/
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CB_INPUT_CANCELED /* input canceled by user */
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} CallbackMessage;
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/* Classes inheriting this can send & receive callback messages.
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*/
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class CallBack {
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protected:
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char *callback_user_data; // data set by Caller
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CallBack *callback_target; // Caller: default CallBack that message() sends to
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public:
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CallBack() {
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callback_user_data = nullptr;
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callback_target = nullptr;
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}
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virtual ~CallBack() { }
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// receive message
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virtual uint16 callback(uint16 msg, CallBack *caller, void *data = nullptr) {
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DEBUG(0, LEVEL_WARNING, "Unhandled callback. msg (%x)\n", msg);
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return 0;
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}
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// send message
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uint16 message(uint16 msg, void *msg_data = nullptr, void *my_data = nullptr) {
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if (my_data)
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set_user_data(my_data);
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callback_target->set_user_data(callback_user_data);
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return (callback_target->callback(msg, this, msg_data));
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}
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void set_user_data(void *user_data) {
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callback_user_data = (char *)user_data;
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}
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void set_target(CallBack *t) {
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callback_target = t;
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}
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};
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} // End of namespace Nuvie
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} // End of namespace Ultima
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#endif
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