问题
So I know this sounds like a duplicate, but it isn't (or if it is, the accepted answer on all the ones I can find doesn't work the way I need it to). The issue is this:
I'm writing in HTML5 using jQuery, I need to make a grid allow multi-select with control and shift. I have that logic working, but whenever you shift-click it selects the text in the grid. I want to prevent this selection, but here's the critical difference between this and the other questions I found: I want selection of text to work at all other times.
To restate: I want to disable text selection using shift WITHOUT disabling all text selection for the elements specified. Does anyone know how I can do that?
-- EDIT --
The following (in the constructor for the grid) solved this for me. As the answerer suggested, I declared a class for unselectability.
this.gridBody = $("#userGrid");
var handleKeydown = function(e)
{
e = e || window.event;
var keyPressed = e.keyCode || e.which;
if (keyPressed == keys.shift) {
e.data.gridBody.addClass("unselectable");
}
};
var handleKeyup = function(e)
{
e = e || window.event;
var keyPressed = e.keyCode || e.which;
if (keyPressed == keys.shift) {
e.data.gridBody.removeClass("unselectable");
}
};
$(document).on('keydown', this, handleKeydown);
$(document).on('keyup', this, handleKeyup);
回答1:
That will bind on document an event where it disables text selection upon pressing DOWN shift
document.onkeydown = function(e) {
var keyPressed = e.keyCode;
if (keyPressed == 16) { //thats the keycode for shift
$('html').css({'-moz-user-select':'-moz-none',
'-moz-user-select':'none',
'-o-user-select':'none',
'-khtml-user-select':'none',
'-webkit-user-select':'none',
'-ms-user-select':'none',
'user-select':'none'
}); //or you could pass these css rules into a class and add that class to html instead
document.onkeyup = function() {
//here you remove css rules that disable text selection
}
}
}
Hopefully i have helped you.
Based on comments
document.onkeydown = function(e) {
var keyPressed = e.keyCode;
if (keyPressed == 16) { //thats the keycode for shift
$('html').addClass('unselectable'); //unselectable contains aforementioned css rules
document.onkeyup = function() {
$('html').removeClass('unselectable'); //and simply remove unselectable class making text selection availabe
}
}
}
回答2:
Another solution you might consider: instead of preventing text selection by watching for shift keys and toggling selectability, you could just clear the text selection.
window.getSelection().removeAllRanges();
I find this more convenient because it can be run in your click handler to "cancel" the default behavior. Appears to work in IE 9+ and other modern browsers.
来源:https://stackoverflow.com/questions/18645216/how-can-i-disable-text-selection-using-shift-without-disabling-all-text-selectio