如何使用Polymer1.0实现长按事件？

Question

It seems like long-press event is not part of the Polymer's specifications.

How would you implement that ?

I thought about using a behavior and using down and up event with some debounce tricks to manage such a new event but that means I have to make a custom element to use this behavior and can't for example use it directly on any elements I want like :

<div on-long-press="_cheese">...</div>

which is not convenient.

Would you have other solutions ?

Answer 1

You don't have to make a custom element for this. This is what polymer behaviors are for. They provide a way for different polymer elements to share common behaviors.

As for the actual javascript for implementing the long-press you can get ideas from this question .

Answer 2

You can use a Vaadin gesture for this.

https://github.com/vaadin/vaadin-context-menu/blob/master/vaadin-long-touch.html

<paper-button on-vaadin-long-touch="function"></paper-button>