50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
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$(function() {
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$(document).on('click', 'button[data-increment]', function() {
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data_delta_update($('#'+$(this).data('increment')), +1);
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});
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$(document).on('click', 'button[data-decrement]', function() {
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data_delta_update($('#'+$(this).data('decrement')), -1);
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});
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$(document).on('change keyup', 'input[type="text"][data-delta]', function() {
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data_delta_update(this, 0);
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});
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});
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function data_delta_update(el, direction) {
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var id = $(el).attr('id');
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var min = $(el).data('min');
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var max = $(el).data('max');
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var delta = $(el).data('delta');
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var granularity = $(el).data('granularity');
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var val = $(el).val().replace(',', '.');
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var oldval = $.isNumeric(val) ? Number(val) : 0;
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var newval = oldval + delta*direction;
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if (newval < min) newval = min;
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if (newval > max) newval = max;
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// disable buttons when min/max reached
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$('button[data-decrement='+id+']').attr('disabled', newval<=min ? 'disabled' : null);
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$('button[data-increment='+id+']').attr('disabled', newval>=max ? 'disabled' : null);
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// warn when what was entered is not a number
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const erroneousValue = val!='' && val!='.' && (!$.isNumeric(val) || val < 0)
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$(el).toggleClass('error', erroneousValue);
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// update field, unless the user is typing
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if (!$(el).is(':focus') && !erroneousValue) {
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$(el).val(round_float(newval, granularity));
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$(el).trigger('changed');
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}
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}
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// truncate numbers because of tiny floating point deviations
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// if we don't do this, 1.0 might be shown as 0.99999999
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function round_float(s, granularity) {
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var e = granularity ? 1/granularity : 1000;
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return Math.round(Number(s)*e) / e;
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}
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