Panda3D
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configurable.h
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file configurable.h
10 * @author mike
11 * @date 1997-01-09
12 */
13
14#ifndef CONFIGURABLE_H
15#define CONFIGURABLE_H
16
17// Includes
18
19#include "pandabase.h"
20
21#include "typedObject.h"
22
23// Defines
24
25/**
26 * An object that has data or parameters that are set less frequently (at
27 * least occasionally) than every frame. We can cache the configuration info
28 * by by using the "dirty" flag.
29 */
30class EXPCL_PANDA_PUTIL Configurable : public TypedObject {
31public:
32
33 Configurable( void ) { make_dirty(); }
34 virtual void config( void ) { _dirty = false; }
35 INLINE void check_config() const {
36 if (_dirty) {
37 // This is a sneaky trick to allow check_config() to be called from a
38 // const member function. Even though we will be calling config(), a
39 // non-const function that modifies the class object, in some sense it's
40 // not really modifying the class object--it's just updating a few
41 // internal settings for consistency.
42 ((Configurable *)this)->config();
43 }
44 }
45
46 INLINE bool is_dirty() const { return _dirty; }
47 INLINE void make_dirty() { _dirty = true; }
48
49private:
50
51 bool _dirty;
52
53
54public:
55 static TypeHandle get_class_type() {
56 return _type_handle;
57 }
58 static void init_type() {
60 register_type(_type_handle, "Configurable",
61 TypedObject::get_class_type());
62 }
63 virtual TypeHandle get_type() const {
64 return get_class_type();
65 }
66 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
67
68
69private:
70 static TypeHandle _type_handle;
71};
72
73#endif
An object that has data or parameters that are set less frequently (at least occasionally) than every...
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
This is an abstract class that all classes which use TypeHandle, and also provide virtual functions t...
Definition typedObject.h:88
static void init_type()
This function is declared non-inline to work around a compiler bug in g++ 2.96.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
void register_type(TypeHandle &type_handle, const std::string &name)
This inline function is just a convenient way to call TypeRegistry::register_type(),...
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.