jQuery - Focus out on TR

问题

Okay, so I'm making a plugin to allow inline editing of tables in my website, going great so far, I've got most of it done, but I can't seem to get Focusing out of the table right. So if someone is done editing and starts editing a new row or just clicks out of the row, it should save and go back to normal. But if I use blur on the row, there's no response, but if I use blur on the element, it triggers when people swap from one element to another

But if I use focusout on the row, it triggers whenever someone leaves the element as well, even if they click in the same row. Nor is there anything under the event variable that tell me what element it's setting the focus on, so I can't compare with the current row to see if they're just clicking with in the row.

I'm thinking of having it save on Enter/Mouse Click to a Save button/Start editing another row, but I'd rather get this to work, as it seems to be a much better method of doing it. Thought anyone? Please?

回答1:

I would handle your request by binding a click handler for the whole document, and then adding a stopPropagation() call within my other click events. I've setup a fiddle to demonstrate: http://jsfiddle.net/NwftK/

<table border="1" width="200">
    <tr id="myRow"><td>Hello</td><td>World</td></tr>
</table>

And the jQuery:

$(function () {
    $("#myRow").on('click', function (e) {
       $(this).css('background-color', 'blue');
        e.stopPropagation();
    }); 

    $(document).on('click', function () {

       $("#myRow").css('background-color', 'red');
    });

});

回答2:

The problem is that even if you have nested elements, focusout will trigger on the parent element when you focus on one of the child elements. A solution I can think of would be to keep track of the current row using a variable. The pseudo code might work something like this:

var row = '';
$(table_element).click(function() { 
                           focused_row = $(this).parent();
                           if(row != '' && focused_row != row) {
                               //code to save edits, user clicked different row
                           }
                           row = focused_row;
                       });

回答3:

There are 2 cases where you need to detect when the row loses focus, One while you are inside the table and two when you leave the table.

You can try something like this:

//store the last visited row
var row = false;

// save the row if has changed
function save () {
    if (row.changed){
        console.log("save");
    }
}

// keep track of the row you are in
// it doesnt work when you leave the table
$("tr").on("focusin", function (e) {
    if (row != this){
        if (row){
            save();
        }
        row = this;
        e.stopPropagation();
    }
});

//keep track whenever the row changes
$("tr").on("change", function (e) {
    this.changed = true;
    console.log("changed");
})

//triggers when you leave the table, you can try to save changes then.
$(document).on("focusin", function (e) {
    var el = $(e.target); //input or element that triggers this event
    var elrow = el.parent().parent()[0]; // try to get the row from that input, ... if its an input
    if (row && row !=elrow) {
        save();
        e.stopPropagation();
    };
})

来源：https://stackoverflow.com/questions/8410587/jquery-focus-out-on-tr

标签

jquery

tablerow

focusout