Hi Thomas,
thank you for sharing,
I've come up with something similar, but will definitely take some
inspiration from your code.
Cheers
Vit
On 4/5/20 9:51 PM, Thomas Heigl wrote:
Hi Vit,
I'm using a utility class to encapsulate these use cases:
/** Utility class for interacting with {@link AjaxRequestTarget}s */
public final class AjaxTarget {
private AjaxTarget() {
// utility class
}
/**
* Checks if there is an active {@link AjaxRequestTarget}
*
* @return {@code true} if there is a request target bound to the thread,
else {@code false}
*/
public static boolean exists() {
return find().isPresent();
}
/** @return the {@link AjaxRequestTarget} bound to the thread or {@code
null} */
public static AjaxRequestTarget get() {
return find().orElse(null);
}
/** @return the optional {@link AjaxRequestTarget} bound to the thread */
public static Optional<AjaxRequestTarget> find() {
return RequestCycle.get().find(AjaxRequestTarget.class);
}
/**
* Adds the given components to the active request target if available.
*
* @param component the first component to add
* @param otherComponents the other components to add
* @see AjaxRequestTarget#add(org.apache.wicket.Component...)
*/
public static void add(Component component, Component... otherComponents) {
find().ifPresent(t -> {
if (component != null) {
t.add(component);
}
t.add(otherComponents);
});
}
/**
* Adds all components of the given class to the active request target if
available.
*
* @param childCriteria the child component class
* @param <T> the type of child component
* @see AjaxRequestTarget#addChildren(org.apache.wicket.MarkupContainer,
Class)
*/
public static <T> void add(Class<T> childCriteria) {
find().ifPresent(t -> add(t.getPage(), childCriteria));
}
/**
* Appends JavaScript to the active request target if available
*
* @param javaScript the script to append
* @see AjaxRequestTarget#appendJavaScript(CharSequence)
*/
public static void appendJavaScript(CharSequence javaScript) {
find().ifPresent(t -> t.appendJavaScript(javaScript));
}
/**
* Prepends JavaScript to the active request target if available
*
* @param javaScript the script to prepend
* @see AjaxRequestTarget#prependJavaScript(CharSequence)
*/
public static void prependJavaScript(CharSequence javaScript) {
find().ifPresent(t -> t.prependJavaScript(javaScript));
}
}
Best regards,
Thomas
On Sun, Apr 5, 2020 at 6:58 PM Vit Rozkovec <rozkovec...@email.cz> wrote:
In my project it is around 40 cases of such usage. Is it little? Is it a
lot. I don't know.
Never mind :)
Have a nice day.
Vit
On 4/5/20 11:20 AM, Sven Meier wrote:
Hi,
actually it's not that common, in wicket-core and -extensions this
pattern is used 9 times only.
When the RequestCycle API emerged, we decided against a specific
method and chose a generic one with parameter instead.
Have fun
Sven
On 05.04.20 08:47, Vit Rozkovec wrote:
Hi, this seems to be a frequent use case, wouldn't there be a good
fit for some shorthand method?
Like
/getRequestCycle().onAjax(t-> {});/
boolean getRequestCycle().isAjax();
?
Vit
On 4/4/20 11:51 PM, Sven Meier wrote:
Hi,
you can test for the appropriate request handler:
getRequestCycle().find(IPartialPageRequestHandler.class).ifPresent(target
-> /* do things on partial page update */));
Have fun
Sven
On 04.04.20 23:43, Vilius Vaivada wrote:
Hey guys,
I'm pretty sure I'm missing something obvious here, but I can't
figure out
a simple way for a component to contribute slightly different
Javascript
based on whether it's being rendered for a full page load or a
partial Ajax
response. Any clues?
Thanks a lot!
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