Is a Binder the only way to have automatic handling for a data-entry field being required in Vaadin 8 layout?
In Vaadin 8, the BinderBuilder::asRequired lets us define a Binder where a field is known to be required on a layout. If data is missing, the layout indicates to the user that the field needs to have data entered. This is great functionality, and smartly designed.
But using a Binder can be overkill for very small forms or dialog boxes. For one thing, we must define a data class to interact with the binder which can seem silly for a little form.
➙ Is there any other way to tap into Vaadin’s automatic handling of a required field without using a Binder?
In the Community Articles section of the manual, there is a page, Mark required fields as such. That page shows TextField as having setRequired and setRequiredError methods. But this seems incorrect. I can find no such methods on the latest TextField JavaDoc.
vaadin textfield required vaadin8 required-field
asked Nov 18 '18 at 0:24
Basil BourqueBasil Bourque
110k26375538
add a comment |
In Vaadin 8, the BinderBuilder::asRequired lets us define a Binder where a field is known to be required on a layout. If data is missing, the layout indicates to the user that the field needs to have data entered. This is great functionality, and smartly designed.
But using a Binder can be overkill for very small forms or dialog boxes. For one thing, we must define a data class to interact with the binder which can seem silly for a little form.
➙ Is there any other way to tap into Vaadin’s automatic handling of a required field without using a Binder?
In the Community Articles section of the manual, there is a page, Mark required fields as such. That page shows TextField as having setRequired and setRequiredError methods. But this seems incorrect. I can find no such methods on the latest TextField JavaDoc.
vaadin textfield required vaadin8 required-field
asked Nov 18 '18 at 0:24
Basil BourqueBasil Bourque
110k26375538
For reference: the methods (setRequired...) are from V7 and got removed in favour of the "binder way"
– cfrick
Nov 18 '18 at 20:51
@cfrick Nope, not removed. My link above to JavaDoc is for the current version, 8.6.1.
– Basil Bourque
Nov 18 '18 at 21:21
There is onlysetRequiredIndicatorVisible. The other two you mentioned got removed.
– cfrick
Nov 18 '18 at 21:59
add a comment |
In Vaadin 8, the BinderBuilder::asRequired lets us define a Binder where a field is known to be required on a layout. If data is missing, the layout indicates to the user that the field needs to have data entered. This is great functionality, and smartly designed.
But using a Binder can be overkill for very small forms or dialog boxes. For one thing, we must define a data class to interact with the binder which can seem silly for a little form.
➙ Is there any other way to tap into Vaadin’s automatic handling of a required field without using a Binder?
In the Community Articles section of the manual, there is a page, Mark required fields as such. That page shows TextField as having setRequired and setRequiredError methods. But this seems incorrect. I can find no such methods on the latest TextField JavaDoc.
vaadin textfield required vaadin8 required-field
asked Nov 18 '18 at 0:24
Basil BourqueBasil Bourque
110k26375538
In Vaadin 8, the BinderBuilder::asRequired lets us define a Binder where a field is known to be required on a layout. If data is missing, the layout indicates to the user that the field needs to have data entered. This is great functionality, and smartly designed.
But using a Binder can be overkill for very small forms or dialog boxes. For one thing, we must define a data class to interact with the binder which can seem silly for a little form.
➙ Is there any other way to tap into Vaadin’s automatic handling of a required field without using a Binder?
In the Community Articles section of the manual, there is a page, Mark required fields as such. That page shows TextField as having setRequired and setRequiredError methods. But this seems incorrect. I can find no such methods on the latest TextField JavaDoc.
vaadin textfield required vaadin8 required-field
vaadin textfield required vaadin8 required-field
asked Nov 18 '18 at 0:24
Basil BourqueBasil Bourque
110k26375538
asked Nov 18 '18 at 0:24
Basil BourqueBasil Bourque
110k26375538
edited Nov 18 '18 at 15:56
Basil Bourque
asked Nov 18 '18 at 0:24
Basil BourqueBasil Bourque
110k26375538
asked Nov 18 '18 at 0:24
Basil BourqueBasil Bourque
110k26375538
asked Nov 18 '18 at 0:24
Basil BourqueBasil Bourque
110k26375538
110k26375538
For reference: the methods (setRequired...) are from V7 and got removed in favour of the "binder way"
– cfrick
Nov 18 '18 at 20:51
@cfrick Nope, not removed. My link above to JavaDoc is for the current version, 8.6.1.
– Basil Bourque
Nov 18 '18 at 21:21
There is onlysetRequiredIndicatorVisible. The other two you mentioned got removed.
– cfrick
Nov 18 '18 at 21:59
add a comment |
For reference: the methods (setRequired...) are from V7 and got removed in favour of the "binder way"
– cfrick
Nov 18 '18 at 20:51
@cfrick Nope, not removed. My link above to JavaDoc is for the current version, 8.6.1.
– Basil Bourque
Nov 18 '18 at 21:21
There is onlysetRequiredIndicatorVisible. The other two you mentioned got removed.
– cfrick
Nov 18 '18 at 21:59
For reference: the methods (
setRequired...) are from V7 and got removed in favour of the "binder way"– cfrick
Nov 18 '18 at 20:51
For reference: the methods (
setRequired...) are from V7 and got removed in favour of the "binder way"– cfrick
Nov 18 '18 at 20:51
@cfrick Nope, not removed. My link above to JavaDoc is for the current version, 8.6.1.
– Basil Bourque
Nov 18 '18 at 21:21
@cfrick Nope, not removed. My link above to JavaDoc is for the current version, 8.6.1.
– Basil Bourque
Nov 18 '18 at 21:21
There is only
setRequiredIndicatorVisible. The other two you mentioned got removed.– cfrick
Nov 18 '18 at 21:59
There is only
setRequiredIndicatorVisible. The other two you mentioned got removed.– cfrick
Nov 18 '18 at 21:59
add a comment |
1 Answer
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But using a Binder can be overkill for very small forms or dialog boxes. For one thing, we must define a data class to interact with the binder which can seem silly for a little form.
Yes. This is somewhat true. Thus I implemented FieldBinder tool. Which makes possible to use similar validator - converter chain as with Binder (it replicates the same API for applicable parts) with single field without Bean. Also it has the same facilities to handle validation status changes, uses same way to show required value, or validation error as Binder.
https://vaadin.com/directory/component/fieldbinder
answered Nov 18 '18 at 8:17
Tatu LundTatu Lund
2,494149
add a comment |
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1 Answer
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But using a Binder can be overkill for very small forms or dialog boxes. For one thing, we must define a data class to interact with the binder which can seem silly for a little form.
Yes. This is somewhat true. Thus I implemented FieldBinder tool. Which makes possible to use similar validator - converter chain as with Binder (it replicates the same API for applicable parts) with single field without Bean. Also it has the same facilities to handle validation status changes, uses same way to show required value, or validation error as Binder.
https://vaadin.com/directory/component/fieldbinder
answered Nov 18 '18 at 8:17
Tatu LundTatu Lund
2,494149
add a comment |
But using a Binder can be overkill for very small forms or dialog boxes. For one thing, we must define a data class to interact with the binder which can seem silly for a little form.
Yes. This is somewhat true. Thus I implemented FieldBinder tool. Which makes possible to use similar validator - converter chain as with Binder (it replicates the same API for applicable parts) with single field without Bean. Also it has the same facilities to handle validation status changes, uses same way to show required value, or validation error as Binder.
https://vaadin.com/directory/component/fieldbinder
answered Nov 18 '18 at 8:17
Tatu LundTatu Lund
2,494149
add a comment |
But using a Binder can be overkill for very small forms or dialog boxes. For one thing, we must define a data class to interact with the binder which can seem silly for a little form.
Yes. This is somewhat true. Thus I implemented FieldBinder tool. Which makes possible to use similar validator - converter chain as with Binder (it replicates the same API for applicable parts) with single field without Bean. Also it has the same facilities to handle validation status changes, uses same way to show required value, or validation error as Binder.
https://vaadin.com/directory/component/fieldbinder
answered Nov 18 '18 at 8:17
Tatu LundTatu Lund
2,494149
But using a Binder can be overkill for very small forms or dialog boxes. For one thing, we must define a data class to interact with the binder which can seem silly for a little form.
Yes. This is somewhat true. Thus I implemented FieldBinder tool. Which makes possible to use similar validator - converter chain as with Binder (it replicates the same API for applicable parts) with single field without Bean. Also it has the same facilities to handle validation status changes, uses same way to show required value, or validation error as Binder.
https://vaadin.com/directory/component/fieldbinder
answered Nov 18 '18 at 8:17
Tatu LundTatu Lund
2,494149
answered Nov 18 '18 at 8:17
Tatu LundTatu Lund
2,494149
answered Nov 18 '18 at 8:17
Tatu LundTatu Lund
2,494149
answered Nov 18 '18 at 8:17
Tatu LundTatu Lund
2,494149
2,494149
add a comment |
add a comment |
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For reference: the methods (
setRequired...) are from V7 and got removed in favour of the "binder way"– cfrick
Nov 18 '18 at 20:51
@cfrick Nope, not removed. My link above to JavaDoc is for the current version, 8.6.1.
– Basil Bourque
Nov 18 '18 at 21:21
There is only
setRequiredIndicatorVisible. The other two you mentioned got removed.– cfrick
Nov 18 '18 at 21:59