In my latest project I felt the need for a built in debounce <https://reactivex.io/documentation/operators/debounce.html> which is fairly common for search fields or similar. Andrea
Il giorno mer 10 nov 2021 alle ore 08:51 Tom Schindl < tom.schi...@bestsolution.at> ha scritto: > Hi, > > We had something very similar in Eclipse-Databinding so I think > something like that makes a lot of sense but I wonder how you want to > implement this FOCUS, ACTION. > > Another thing we had was a delayed-Observable where the sync only > happened if there hasn't been a change with a user specified timeout > which fairly nice to implement undo/redo like stuff eg in TextAreas. > > As you don't have access to Node in javafx.base I'm not sure how you > want to implement the trigger stuff. Just in case in Eclipse-Databinding > world we had stuff like this in a module (in this case OSGi-Bundle) who > has access to both the core-API and the ui-API. > > Tom > > Am 10.11.21 um 06:45 schrieb Michael Strauß: > > JavaFX developers routinely use programming patterns like MVC, MVP, or > > MVVM to separate views from their associated business logic. Bindings > > can be used to connect the values of UI controls (like Label or > > TextField) to properties on a business logic class. > > > > A typical (simplified) scenario may look like this: > > > > var valueField = new TextField(); > > > valueField.textProperty().bindBidirectional(businessLogic.valueProperty()); > > > > The business logic class may perform data validation or other actions > > on the value that was entered in the TextField. However, in many > > cases, it is neither necessary nor desirable for the binding to update > > the business-layer property on every single change (i.e. every single > > character that was typed by a user). For example, if a business rule > > verifies that the data entered by a user is formatted in a specific > > way, it's usually not a great experience to yield a validation error > > before the user has finished typing. Instead, it's often better to > > wait until the user has significantly interacted with a UI control > > before running business logic. > > > > For this reason, I propose to add a new type of binding to the > > javafx.beans.binding.Bindings class: > > > > void bindBidirectional(Property<T> target, Property<T> source, > > UpdateSourceTrigger trigger) > > > > UpdateSourceTrigger is an enumeration that allows developers to > > specify the condition on which changes of the target property will > > update the source property. Its values are: > > > > DEFAULT: Updates the source property on every change (this is the > > default behavior of bidirectional bindings). > > FOCUS: Updates the source property when the UI control loses input focus. > > ACTION: Updates the source property when the UI control loses input > > focus or when it receives an ActionEvent (in the case of TextField, > > this corresponds to the ENTER key). > > > > Note that this setting only applies to changes of the target property. > > When the source property is changed instead, the target property is > > always immediately updated. > > > > Any feedback on this proposal is appreciated. > > > > -- > Tom Schindl - CTO > BestSolution.at EDV Systemhaus GmbH > Salurner Straße 15, A-6020 Innsbruck > Phone: ++43 (0)512 935834 > http://www.BestSolution.at - http://efxclipse.org >
