How can I pass ONLY clicks through a SVG with pointer-events?

Question 1

How can I pass ONLY clicks through a SVG with pointer-events?

javascript css svg click pointer-events

ephtron · Feb 2, 2015 · Viewed 7.7k times · Source

Answer

Answer

I found a solution to my problem. It is possible to traverse through all underlying elements with the elementFromPoint(x,y); function. I wrote a helper-function that checks if the first selected element is a SVG - if it is one its' display is set to "none" and the next element is selected.

function get_element_under_svg(x,y){
    var resulting_element;
    var first_element = document.elementFromPoint(x,y);
    //check if first_element is a svg
    if (first_element.nodeName == "rect") {
      _display = first_element.style.display;    //save display of svg
      first_element.style.display = "none";      // make svg invisible
      resulting_element = document.elementFromPoint(x,y); 
      first_element.style.display = _display;    // reset display
    } else {
      resulting_element = first_element;
    }
    return resulting_element;
  }  
  return lower_element;
}

At the end of the day I set pointer-events: auto for my SVG and for my div:

#website{
  pointer-event: auto;
}
svg{
  pointer-event: auto;
}

And to my svg I added the following:

.on("click", function(d,i) {
  var element = get_element_under_rect( mouse.x, mouse.y );
  element.click(); // simulate click on the underlying element
});

With this approach my SVG is still capable to receive hover- or click-events, while it is able to pass clicks to underlying elements. See also https://developer.mozilla.org/en-US/docs/Web/API/document.elementFromPoint

Thanks for the other approaches!

Question 2

I have a SVG overlaying a div with a button. I know that i can pass mouse-events through the SVG by setting "pointer-events: none;" for my SVG. However when I do this the SVG wont recognize mouse-events anymore.

<body>
  <div id="website">
    <form action="input_button.htm">
      <p>
        <textarea cols="20" rows="4" name="text"></textarea>
        <input type="button" name="Text 1" value="show text" 
         onclick="this.form.text.value='Test'">
      </p>
    </form>
  </div>
  <div id="svgRect">
    <svg width="1845" height="140">
      <rect id="r0"></rect>
    </svg>
  </div>
</body>

I want my SVG to be able to recognize when the mouse is over it but pass clicks to elements (divs/ buttons / ...) underneath itself. So my SVG should only be the target of hover-events and my button should be the target of click-events.

Among some other approaches I tried it like this: - Nothing worked.

.on("mousedown", function(d,i){
   d3.select("#r0")
     .style("pointer-events", "none");
   d3.select("#website")
     .style("pointer-events", "auto");}
.on("mouseup", function(d,i){
   d3.select("#r0")
     .style("pointer-events", "auto");
   d3.select("#website")
     .style("pointer-events", "none");
}

The idea was to disable pointer-events when I press the mouse-button and enable them again when I release it.

Does anyone know a solution or work-arround for this problem? Thanks!

How can I pass ONLY clicks through a SVG with pointer-events?

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