Iron A11y Keys Behavior Framework specification and standard in the Java class library
Iron A11y Keys Behavior Framework specification and standard in the Java class library
Iron A11y Keys Behavior is a framework specification and standard for the key behavior used to achieve accessible in the Java class library.Accessability means that users of different abilities can easily access and use the design principles of applications or websites.
Iron A11y Keys Behavior aims to simplify and standardize the creation of accessible user interface by providing developers with reusable behaviors.It provides a set of specifications and interfaces to handle user input, keyboard navigation, and other functions that interact with keyboards to ensure that the application has good response and availability for keyboard operations.
The following is some of the main specifications and standards of Iron A11Y Keys Behavior:
1. Keyboard focus management: Iron A11y Keys Behavior provides a mechanism for managing keyboard focus, allowing users to navigate between different elements of the application using a specific key (such as the TAB key) on the keyboard.Developers can define the focus order and navigation behavior according to specific use cases and needs.
2. Keyboard event processing: Iron A11y Keys Behavior provides developers with a simple and consistent way to handle different types of keyboard input by defining the specifications and interfaces of keyboard events.For example, you can define pressing Enter key to trigger a certain operation, and press the ESC key to cancel the operation.
Below is a simple Java code example, showing how to use Iron A11Y Keys Behavior to implement keyboard event processing:
import com.vaadin.flow.component.Key;
import com.vaadin.flow.component.KeyModifier;
import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.dependency.HtmlImport;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.router.Route;
import com.vaadin.flow.theme.Theme;
import com.vaadin.flow.theme.lumo.Lumo;
@Route("")
@Theme(Lumo.class)
@HtmlImport("frontend://bower_components/iron-a11y-keys/iron-a11y-keys.html")
public class MyView extends VerticalLayout {
public MyView() {
IronA11yKeys ironA11yKeys = new IronA11yKeys(this);
ironA11yKeys.addDelegate(new IronA11yKeys.KeyDelegate() {
@Override
public void handleKey(Key key, KeyModifier modifier) {
// Treatment of keyboard events
if (key.equals(Key.ENTER) && modifier.equals(KeyModifier.NONE)) {
// Perform the required operations here
}
}
});
Button Button = New Button ("Click my key to trigger)");
button.addClickShortcut(Key.ENTER);
add(button);
}
}
In the above code, we created a Vaadin view called `MyView`, and institutional` Irona11yKeys` into its member variables.Then, we added an anonymous class to the `KeyDelegate` method by calling the` addelegate` method, which processed the keyboard event.In this example, it checked whether the button pressed was the Enter key and did not press any modification keys.In the case of qualified conditions, the required operations can be performed in the corresponding IF statement block.
In addition, we also added a click shortcut key `key.enter` so that users can trigger the click operation by pressing the Enter key.
By following the specifications and standards of Iron A11Y Keys Behavior framework, developers can easily create good access to Java applications to provide better user experience for users with different capabilities.
