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39
40#ifndef QTIMER_H
41#define QTIMER_H
42
43#include <QtCore/qglobal.h>
44
45#ifndef QT_NO_QOBJECT
46
47#include <QtCore/qbasictimer.h> // conceptual inheritance
48#include <QtCore/qobject.h>
49
50#if __has_include(<chrono>)
51# include <chrono>
52#endif
53
54QT_BEGIN_NAMESPACE
55
56
57class Q_CORE_EXPORT QTimer : public QObject
58{
59 Q_OBJECT
60 Q_PROPERTY(bool singleShot READ isSingleShot WRITE setSingleShot)
61 Q_PROPERTY(int interval READ interval WRITE setInterval)
62 Q_PROPERTY(int remainingTime READ remainingTime)
63 Q_PROPERTY(Qt::TimerType timerType READ timerType WRITE setTimerType)
64 Q_PROPERTY(bool active READ isActive)
65public:
66 explicit QTimer(QObject *parent = nullptr);
67 ~QTimer();
68
69 inline bool isActive() const { return id >= 0; }
70 int timerId() const { return id; }
71
72 void setInterval(int msec);
73 int interval() const { return inter; }
74
75 int remainingTime() const;
76
77 void setTimerType(Qt::TimerType atype) { this->type = atype; }
78 Qt::TimerType timerType() const { return Qt::TimerType(type); }
79
80 inline void setSingleShot(bool singleShot);
81 inline bool isSingleShot() const { return single; }
82
83 static void singleShot(int msec, const QObject *receiver, const char *member);
84 static void singleShot(int msec, Qt::TimerType timerType, const QObject *receiver, const char *member);
85
86#ifdef Q_CLANG_QDOC
87 template<typename PointerToMemberFunction>
88 static void singleShot(int msec, const QObject *receiver, PointerToMemberFunction method);
89 template<typename PointerToMemberFunction>
90 static void singleShot(int msec, Qt::TimerType timerType, const QObject *receiver, PointerToMemberFunction method);
91 template<typename Functor>
92 static void singleShot(int msec, Functor functor);
93 template<typename Functor>
94 static void singleShot(int msec, Qt::TimerType timerType, Functor functor);
95 template<typename Functor, int>
96 static void singleShot(int msec, const QObject *context, Functor functor);
97 template<typename Functor, int>
98 static void singleShot(int msec, Qt::TimerType timerType, const QObject *context, Functor functor);
99 template <typename Functor>
100 QMetaObject::Connection callOnTimeout(Functor slot, Qt::ConnectionType connectionType = Qt::AutoConnection);
101 template <typename Functor>
102 QMetaObject::Connection callOnTimeout(const QObject *context, Functor slot, Qt::ConnectionType connectionType = Qt::AutoConnection);
103 template <typename MemberFunction>
104 QMetaObject::Connection callOnTimeout(const QObject *receiver, MemberFunction *slot, Qt::ConnectionType connectionType = Qt::AutoConnection);
105#else
106 // singleShot to a QObject slot
107 template <typename Duration, typename Func1>
108 static inline void singleShot(Duration interval, const typename QtPrivate::FunctionPointer<Func1>::Object *receiver, Func1 slot)
109 {
110 singleShot(interval, defaultTypeFor(interval), receiver, slot);
111 }
112 template <typename Duration, typename Func1>
113 static inline void singleShot(Duration interval, Qt::TimerType timerType, const typename QtPrivate::FunctionPointer<Func1>::Object *receiver,
114 Func1 slot)
115 {
116 typedef QtPrivate::FunctionPointer<Func1> SlotType;
117
118 //compilation error if the slot has arguments.
119 Q_STATIC_ASSERT_X(int(SlotType::ArgumentCount) == 0,
120 "The slot must not have any arguments.");
121
122 singleShotImpl(interval, timerType, receiver,
123 new QtPrivate::QSlotObject<Func1, typename SlotType::Arguments, void>(slot));
124 }
125 // singleShot to a functor or function pointer (without context)
126 template <typename Duration, typename Func1>
127 static inline typename std::enable_if<!QtPrivate::FunctionPointer<Func1>::IsPointerToMemberFunction &&
128 !std::is_same<const char*, Func1>::value, void>::type
129 singleShot(Duration interval, Func1 slot)
130 {
131 singleShot(interval, defaultTypeFor(interval), nullptr, std::move(slot));
132 }
133 template <typename Duration, typename Func1>
134 static inline typename std::enable_if<!QtPrivate::FunctionPointer<Func1>::IsPointerToMemberFunction &&
135 !std::is_same<const char*, Func1>::value, void>::type
136 singleShot(Duration interval, Qt::TimerType timerType, Func1 slot)
137 {
138 singleShot(interval, timerType, nullptr, std::move(slot));
139 }
140 // singleShot to a functor or function pointer (with context)
141 template <typename Duration, typename Func1>
142 static inline typename std::enable_if<!QtPrivate::FunctionPointer<Func1>::IsPointerToMemberFunction &&
143 !std::is_same<const char*, Func1>::value, void>::type
144 singleShot(Duration interval, const QObject *context, Func1 slot)
145 {
146 singleShot(interval, defaultTypeFor(interval), context, std::move(slot));
147 }
148 template <typename Duration, typename Func1>
149 static inline typename std::enable_if<!QtPrivate::FunctionPointer<Func1>::IsPointerToMemberFunction &&
150 !std::is_same<const char*, Func1>::value, void>::type
151 singleShot(Duration interval, Qt::TimerType timerType, const QObject *context, Func1 slot)
152 {
153 //compilation error if the slot has arguments.
154 typedef QtPrivate::FunctionPointer<Func1> SlotType;
155 Q_STATIC_ASSERT_X(int(SlotType::ArgumentCount) <= 0, "The slot must not have any arguments.");
156
157 singleShotImpl(interval, timerType, context,
158 new QtPrivate::QFunctorSlotObject<Func1, 0,
159 typename QtPrivate::List_Left<void, 0>::Value, void>(std::move(slot)));
160 }
161
162 template <typename ... Args>
163 QMetaObject::Connection callOnTimeout(Args && ...args)
164 {
165 return QObject::connect(this, &QTimer::timeout, std::forward<Args>(args)... );
166 }
167
168#endif
169
170public Q_SLOTS:
171 void start(int msec);
172
173 void start();
174 void stop();
175
176Q_SIGNALS:
177 void timeout(QPrivateSignal);
178
179public:
180#if __has_include(<chrono>) || defined(Q_QDOC)
181 void setInterval(std::chrono::milliseconds value)
182 {
183 setInterval(int(value.count()));
184 }
185
186 std::chrono::milliseconds intervalAsDuration() const
187 {
188 return std::chrono::milliseconds(interval());
189 }
190
191 std::chrono::milliseconds remainingTimeAsDuration() const
192 {
193 return std::chrono::milliseconds(remainingTime());
194 }
195
196 static void singleShot(std::chrono::milliseconds value, const QObject *receiver, const char *member)
197 {
198 singleShot(msec: int(value.count()), receiver, member);
199 }
200
201 static void singleShot(std::chrono::milliseconds value, Qt::TimerType timerType, const QObject *receiver, const char *member)
202 {
203 singleShot(msec: int(value.count()), timerType, receiver, member);
204 }
205
206 void start(std::chrono::milliseconds value)
207 {
208 start(msec: int(value.count()));
209 }
210#endif
211
212protected:
213 void timerEvent(QTimerEvent *) override;
214
215private:
216 Q_DISABLE_COPY(QTimer)
217
218 inline int startTimer(int){ return -1;}
219 inline void killTimer(int){}
220
221 static Q_DECL_CONSTEXPR Qt::TimerType defaultTypeFor(int msecs) noexcept
222 { return msecs >= 2000 ? Qt::CoarseTimer : Qt::PreciseTimer; }
223 static void singleShotImpl(int msec, Qt::TimerType timerType,
224 const QObject *receiver, QtPrivate::QSlotObjectBase *slotObj);
225
226#if __has_include(<chrono>)
227 static Qt::TimerType defaultTypeFor(std::chrono::milliseconds interval)
228 { return defaultTypeFor(msecs: int(interval.count())); }
229
230 static void singleShotImpl(std::chrono::milliseconds interval, Qt::TimerType timerType,
231 const QObject *receiver, QtPrivate::QSlotObjectBase *slotObj)
232 {
233 singleShotImpl(msec: int(interval.count()),
234 timerType, receiver, slotObj);
235 }
236#endif
237
238 int id, inter, del;
239 uint single : 1;
240 uint nulltimer : 1;
241 uint type : 2;
242 // reserved : 28
243};
244
245inline void QTimer::setSingleShot(bool asingleShot) { single = asingleShot; }
246
247QT_END_NAMESPACE
248
249#endif // QT_NO_QOBJECT
250
251#endif // QTIMER_H
252

source code of qtbase/src/corelib/kernel/qtimer.h