Re: Modern browsers support for Copyclipboard functionality

Hi @Vassilis Virvilis, Can you please help me with how to use elemental2 api, if you can share any reference document about which dependency to add, what should I add to <inherit names=""> etc.  How to use  listeners -> ((Element) Js.cast(getElement())).addEventListener("paste", paste_li); in my case I have a toolbox button like below code, basically a callback attached when one clicks on it. So how to add an eventListener ? I tried to explore myself about this but I didn't get much information. If you can share these details it would be great help as you have already done. Thank you !!

   protected Function pasteFromExcelFunction =new Function(){

    public void execute(){}

}

On Thu, Oct 20, 2022 at 12:36 PM Vassilis Virvilis <vasvir2@gmail.com> wrote:

For non IE browsers I have this:

            // attach event listeners

            // copy - cut - paste handlers
            ((Element) Js.cast(getElement())).addEventListener("copy", copy_li);
            ((Element) Js.cast(getElement())).addEventListener("cut", cut_li);
            ((Element) Js.cast(getElement())).addEventListener("paste", paste_li);

where (Element) is elemental2.dom.Element

copy_li is something like this:

        final elemental2.dom.EventListener copy_li = new elemental2.dom.EventListener() {
            @Override
            public void handleEvent(elemental2.dom.Event evt) {
                final ClipboardEvent event = Js.cast(evt);
                copy(event);
            }
        };

where ClipboardEvent is elemental2.dom.ClipboardEvent

I need a copy function because I reuse it in the "Cut" functionality also.

and finally copy is something like this

   private void copy(ClipboardEvent event) {
        if (!hasData()) {  // <-- hasData() is your application specific function
            return;
        }

        // do application stuff get/iterate and finally get the data in a String form somehow...

        final String data = getData();  // application specific

        event.clipboardData.setData("text/plain", data);
        event.preventDefault();
    }

Similarly the paste evenListener:

        final elemental2.dom.EventListener paste_li = new elemental2.dom.EventListener() {
            @Override
            public void handleEvent(elemental2.dom.Event evt) {
                final ClipboardEvent event = Js.cast(evt);
                final String data = event.clipboardData.getData("text/plain")
                event.preventDefault();
                if (data == null)
                    return;

                // now you need somehow to propagate data to the interesting parties (methods, classes etc)

                // I am using the EventBus from GWT

                getEventBus().fireEvent(new PasteEvent(data));
            }
        };

Hope that helps

     Vassilis

On Thu, Oct 20, 2022 at 9:18 AM Pramod Patil <patil.pramod63@gmail.com> wrote:

Hi All,

In our GWT application we are using Java native method call for Copytoclipboard functionality. Please refer below code

public static native String getClipboardData()/*-{

if($wnd.clipboardData && clipboardData.setData){

return $wnd.clipboardData.getData('Text');

}

}

}-*/ 

public static native String setClipboardData(String data)/*-{

if($wnd.clipboardData && clipboardData.setData){

return $wnd.clipboardData.setData('Text',Data);

}

}

}-*/ 

So above code is working fine with IE browser but not working with modern browser. I know this is not GWT specific question, but I don't have much knowledge with Javascript, so anyone who knows Javascript, please help here.

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Vassilis Virvilis

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Thanks and regards,

 Pramod Patil

 Contact +91-8975432800

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