java - RxJava- CombineLatest but only fire for one Observable's emission? -

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let's have 2 infinite observables can emit values @ moment. combine create observable<processfileevent>.

observable<integer>  selectedfileid= ... observable<mouseclick> buttonclick = ...  observable<processfileevent> `processfileevent` = observable.combinelatest(selectedfileid, buttonclick, (s,b) -> {     //create processfileevent here });

the problem want processfileevent emit when buttonclick emits something, not selectedfileid. it's not behavior user expects when file id inputted , kicks off processfileevent. how combine emit when buttonclick emits?

use .distinctuntilchanged() on mouseclick object. way you'll events when mouseclick changes.

create class contains both fileid , mouseclick:

static class filemouseclick {     final int fileid;     final mouseclick mouseclick;      filemouseclick(int fileid, mouseclick mouseclick) {         this.fileid = fileid;         this.mouseclick = mouseclick;     } }

then

observable.combinelatest(selectedfileid, buttonclick,                           (s,b) -> new filemouseclick(s,b))     .distinctuntilchanged(f -> f.mouseclick)     .map(toprocessfileevent())

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