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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of dart.async; | 5 part of dart.async; |
6 | 6 |
7 /** | 7 /** |
8 * A count-down timer that can be configured to fire once or repeatedly. | 8 * A count-down timer that can be configured to fire once or repeatedly. |
9 * | 9 * |
10 * The timer counts down from the specified duration to 0. | 10 * The timer counts down from the specified duration to 0. |
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89 static void run(void callback()) { | 89 static void run(void callback()) { |
90 new Timer(Duration.ZERO, callback); | 90 new Timer(Duration.ZERO, callback); |
91 } | 91 } |
92 | 92 |
93 /** | 93 /** |
94 * Cancels the timer. | 94 * Cancels the timer. |
95 */ | 95 */ |
96 void cancel(); | 96 void cancel(); |
97 | 97 |
98 /** | 98 /** |
99 * The number of durations preceeding the most recent timer event. | |
floitsch
2017/09/21 23:06:45
preceding
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100 * | |
101 * The value starts at zero and is incremented each time a timer event | |
102 * occurs, so each callback will see a larger value than the previous one. | |
103 * | |
104 * If a periodic timer with a non-zero duration is delayed too much, | |
105 * so more than one tick should have happened, | |
106 * all but the last tick in the past are considered "missed", | |
107 * and no callback is invoked for them. | |
108 * The [tick] count reflects the number of durations that have passed and | |
109 * not the number of callback invocations that have happened. | |
110 */ | |
111 int get tick; | |
112 | |
113 /** | |
99 * Returns whether the timer is still active. | 114 * Returns whether the timer is still active. |
100 * | 115 * |
101 * A non-periodic timer is active if the callback has not been executed, | 116 * A non-periodic timer is active if the callback has not been executed, |
102 * and the timer has not been canceled. | 117 * and the timer has not been canceled. |
103 * | 118 * |
104 * A periodic timer is active if it has not been canceled. | 119 * A periodic timer is active if it has not been canceled. |
105 */ | 120 */ |
106 bool get isActive; | 121 bool get isActive; |
107 | 122 |
108 external static Timer _createTimer(Duration duration, void callback()); | 123 external static Timer _createTimer(Duration duration, void callback()); |
109 external static Timer _createPeriodicTimer( | 124 external static Timer _createPeriodicTimer( |
110 Duration duration, void callback(Timer timer)); | 125 Duration duration, void callback(Timer timer)); |
111 } | 126 } |
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