Initial value with StreamController without RxDart
I'm using StreamControllers with Flutter. I have a model with some default values. From the widgets where I'm listening to the stream I want to supply some of those default values. I can see I can set an initial value on the StreamBuilder, but I want to use data from the model inside the bloc as initial data. So as soon as someone is using the snapshot data they get the default values. I've seen RxDart has a seed value, just wondering if this is possible without replacing with RxDart?
flutter edited Nov 17 '18 at 18:05
Günter Zöchbauer
317k66944885
asked Nov 16 '18 at 22:37
Rasmus ChristensenRasmus Christensen
5,07373261
add a comment |
I'm using StreamControllers with Flutter. I have a model with some default values. From the widgets where I'm listening to the stream I want to supply some of those default values. I can see I can set an initial value on the StreamBuilder, but I want to use data from the model inside the bloc as initial data. So as soon as someone is using the snapshot data they get the default values. I've seen RxDart has a seed value, just wondering if this is possible without replacing with RxDart?
flutter edited Nov 17 '18 at 18:05
Günter Zöchbauer
317k66944885
asked Nov 16 '18 at 22:37
Rasmus ChristensenRasmus Christensen
5,07373261
StreamController#add?
– pskink
Nov 17 '18 at 7:23
Ohh my bad I added to the sink before I made the setup in my constructor. Now when everything is created I add the initial model values as the last part of the constructor and i works as expected. @pskink could you add an answer :)
– Rasmus Christensen
Nov 17 '18 at 8:05
add a comment |
I'm using StreamControllers with Flutter. I have a model with some default values. From the widgets where I'm listening to the stream I want to supply some of those default values. I can see I can set an initial value on the StreamBuilder, but I want to use data from the model inside the bloc as initial data. So as soon as someone is using the snapshot data they get the default values. I've seen RxDart has a seed value, just wondering if this is possible without replacing with RxDart?
flutter edited Nov 17 '18 at 18:05
Günter Zöchbauer
317k66944885
asked Nov 16 '18 at 22:37
Rasmus ChristensenRasmus Christensen
5,07373261
I'm using StreamControllers with Flutter. I have a model with some default values. From the widgets where I'm listening to the stream I want to supply some of those default values. I can see I can set an initial value on the StreamBuilder, but I want to use data from the model inside the bloc as initial data. So as soon as someone is using the snapshot data they get the default values. I've seen RxDart has a seed value, just wondering if this is possible without replacing with RxDart?
flutter flutter edited Nov 17 '18 at 18:05
Günter Zöchbauer
317k66944885
asked Nov 16 '18 at 22:37
Rasmus ChristensenRasmus Christensen
5,07373261
edited Nov 17 '18 at 18:05
Günter Zöchbauer
317k66944885
asked Nov 16 '18 at 22:37
Rasmus ChristensenRasmus Christensen
5,07373261
edited Nov 17 '18 at 18:05
Günter Zöchbauer
317k66944885
edited Nov 17 '18 at 18:05
Günter Zöchbauer
317k66944885
edited Nov 17 '18 at 18:05
Günter Zöchbauer
317k66944885
317k66944885
asked Nov 16 '18 at 22:37
Rasmus ChristensenRasmus Christensen
5,07373261
asked Nov 16 '18 at 22:37
Rasmus ChristensenRasmus Christensen
5,07373261
asked Nov 16 '18 at 22:37
Rasmus ChristensenRasmus Christensen
5,07373261
5,07373261
StreamController#add?
– pskink
Nov 17 '18 at 7:23
Ohh my bad I added to the sink before I made the setup in my constructor. Now when everything is created I add the initial model values as the last part of the constructor and i works as expected. @pskink could you add an answer :)
– Rasmus Christensen
Nov 17 '18 at 8:05
add a comment |
StreamController#add?
– pskink
Nov 17 '18 at 7:23
Ohh my bad I added to the sink before I made the setup in my constructor. Now when everything is created I add the initial model values as the last part of the constructor and i works as expected. @pskink could you add an answer :)
– Rasmus Christensen
Nov 17 '18 at 8:05
StreamController#add ?– pskink
Nov 17 '18 at 7:23
StreamController#add ?– pskink
Nov 17 '18 at 7:23
Ohh my bad I added to the sink before I made the setup in my constructor. Now when everything is created I add the initial model values as the last part of the constructor and i works as expected. @pskink could you add an answer :)
– Rasmus Christensen
Nov 17 '18 at 8:05
Ohh my bad I added to the sink before I made the setup in my constructor. Now when everything is created I add the initial model values as the last part of the constructor and i works as expected. @pskink could you add an answer :)
– Rasmus Christensen
Nov 17 '18 at 8:05
add a comment |
1 Answer
1
active
oldest
votes
what you are looking for is StreamController#add method,
Sends a data event.
Listeners receive this event in a later microtask.
Note that a synchronous controller (created by passing true to the
sync parameter of the StreamController constructor) delivers events
immediately. Since this behavior violates the contract mentioned here,
synchronous controllers should only be used as described in the
documentation to ensure that the delivered events always appear as if
they were delivered in a separate microtask.
happy fluttering
answered Nov 17 '18 at 8:18
pskinkpskink
15.6k33648
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
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active
oldest
votes
what you are looking for is StreamController#add method,
Sends a data event.
Listeners receive this event in a later microtask.
Note that a synchronous controller (created by passing true to the
sync parameter of the StreamController constructor) delivers events
immediately. Since this behavior violates the contract mentioned here,
synchronous controllers should only be used as described in the
documentation to ensure that the delivered events always appear as if
they were delivered in a separate microtask.
happy fluttering
answered Nov 17 '18 at 8:18
pskinkpskink
15.6k33648
add a comment |
what you are looking for is StreamController#add method,
Sends a data event.
Listeners receive this event in a later microtask.
Note that a synchronous controller (created by passing true to the
sync parameter of the StreamController constructor) delivers events
immediately. Since this behavior violates the contract mentioned here,
synchronous controllers should only be used as described in the
documentation to ensure that the delivered events always appear as if
they were delivered in a separate microtask.
happy fluttering
answered Nov 17 '18 at 8:18
pskinkpskink
15.6k33648
add a comment |
what you are looking for is StreamController#add method,
Sends a data event.
Listeners receive this event in a later microtask.
Note that a synchronous controller (created by passing true to the
sync parameter of the StreamController constructor) delivers events
immediately. Since this behavior violates the contract mentioned here,
synchronous controllers should only be used as described in the
documentation to ensure that the delivered events always appear as if
they were delivered in a separate microtask.
happy fluttering
answered Nov 17 '18 at 8:18
pskinkpskink
15.6k33648
what you are looking for is StreamController#add method,
Sends a data event.
Listeners receive this event in a later microtask.
Note that a synchronous controller (created by passing true to the
sync parameter of the StreamController constructor) delivers events
immediately. Since this behavior violates the contract mentioned here,
synchronous controllers should only be used as described in the
documentation to ensure that the delivered events always appear as if
they were delivered in a separate microtask.
happy fluttering
answered Nov 17 '18 at 8:18
pskinkpskink
15.6k33648
answered Nov 17 '18 at 8:18
pskinkpskink
15.6k33648
answered Nov 17 '18 at 8:18
pskinkpskink
15.6k33648
answered Nov 17 '18 at 8:18
pskinkpskink
15.6k33648
15.6k33648
add a comment |
add a comment |
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StreamController#add?– pskink
Nov 17 '18 at 7:23
Ohh my bad I added to the sink before I made the setup in my constructor. Now when everything is created I add the initial model values as the last part of the constructor and i works as expected. @pskink could you add an answer :)
– Rasmus Christensen
Nov 17 '18 at 8:05