Excellent! Will be good to have some company on the Elemental2 journey. 🙂
While I'm sharing... I wrote a method to load an HTMLImageElement from a
base64 encoded string:
public static void loadImage(String imgBase64, Consumer<HTMLImageElement>
loaded) {
HTMLImageElement img = (HTMLImageElement)DomGlobal.document.createElement(
"img");
img.onload = e -> {
loaded.accept(img);
return null;
};
img.onerror = e -> {
DomGlobal.console.error("Failed to load image.");
return null;
};
img.src = imgBase64;
}
What I don't understand is why onload and onerror need a return value? I
just return null as I've no clue what the return value should be.
On Thursday, 31 July 2025 at 4:20:40 pm UTC+10 Ralph Fiergolla wrote:
> Craig!
> Don’t worry - i am following your Elemtal2 Experience closely. It is on my
> to-do list for quite some time now. Thanks for sharing!
> Ralph
>
> Craig Mitchell <[email protected]> schrieb am Do. 31. Juli 2025 um
> 02:37:
>
>> On the off chance someone reads the above post and thinks Elemental2
>> isn't very good. Just to make it clear, Elemental2 is awesome. Just now I
>> needed a WeakHashMap. GWT said no. Elemental2 said sure can, with
>> JsWeakMap. Love it!
>>
>> On Wednesday, 30 July 2025 at 2:34:49 pm UTC+10 Craig Mitchell wrote:
>>
>>> I've switched to use Elemental2 for a few things. The rest of my app
>>> still uses the standard GWT widgets.
>>>
>>> I can bind directly to the Elemental2 elements from the GWT UI Binder,
>>> however, if I programatically want to add an Elemental2 element to a GWT
>>> Widget, there doesn't seem to be a direct way to do this.
>>>
>>> Eg: How would you add the Elemental2 HTMLCanvasElement, to a
>>> GWT SimplePanel using its setWidget method?
>>>
>>> To work around this, I created an "Elemental2Widget":
>>>
>>> import com.google.gwt.dom.client.Element;
>>> import com.google.gwt.user.client.ui.Widget;
>>> import jsinterop.base.Js;
>>>
>>> public class Elemental2Widget<T> extends Widget {
>>> public Elemental2Widget(T elemental2Widget) {
>>> Element element = Js.cast(elemental2Widget);
>>> setElement(element);
>>> }
>>> public T getElemental2Widget() {
>>> return Js.cast(getElement());
>>> }
>>> }
>>>
>>> Now I can call it like this:
>>>
>>> simplePanel.setWidget(new Elemental2Widget<>(htmlCanvasElement));
>>>
>>> Is this how people mix Elemental2 with GWT widgets? Or is there a
>>> better way?
>>>
>>> --
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