Slider Widget¶
input-slider.htm
(hint: right click, save as)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 | <style> /* Align multiple slider inputs by suitably fixing their value width: */ .form-inline .form-control.slider-value { width: 80px; } </style> <div class="panel panel-primary"> <div class="panel-heading">Slider Widget</div> <div class="panel-body"> <h3>Standard Numerical Inputs</h3> <p>The number input is just the bootstrap default:</p> <input class="form-control" type="number" id="input-num1" name="num1" value="80" min="0" max="100" step="1"> <br/> <p>The range input has some styling optimization for touch devices:</p> <input class="form-control" type="range" id="input-rng1" name="rng1" value="80" min="0" max="100" step="1"> <br/> <h3>Slider Widget</h3> <p> In many cases you'd like to give especially the touchscreen user a combination of these input elements, and as sliding may be too imprecise you also need large buttons for single step changes. That's what the slider widget does. It also adds the option of a checkbox and a default value to reflect if the user control shall be applied. </p> <div class="row"> <div class="col-md-9"> <p>Sliders can easily be created from minimal markup using the <code>.slider()</code> plugin, with configuration given by data attributes and/or dynamic options:</p> <div class="form-control slider" id="sld1" data-min="-5" data-max="50" data-step="0.5" data-default="40" data-unit="%" data-disabled="false" data-checked="true" data-value="10" /> <br/> <div class="form-control slider" id="sld2" /> <br/> <p>…and slider state, limits and value can be controlled using the same method:<br/> <button type="button" class="btn btn-default" onclick="$('#sld1').slider({ value:42 })"> Set sld1 value to 42 </button> <button type="button" class="btn btn-default" onclick="$('#sld1').slider({ checked:true })"> Check sld1 </button> <button type="button" class="btn btn-default" onclick="$('#sld1').slider({ disabled:true })"> Disable sld1 </button> <button type="button" class="btn btn-default" onclick="$('#sld1').slider({ disabled:false })"> Enable sld1 </button> </p> <br/> <p>If you need even more control, you can create the slider markup yourself as well:</p> <div class="form-control slider" id="sld3" data-default="50" data-reset="false" data-value="80" data-min="-10" data-max="100" data-step="1"> <div class="slider-control form-inline"> <input class="slider-enable" type="checkbox" checked> <input class="form-control slider-value" type="number" id="input-sld3" name="sld3"> <span class="slider-unit">%</span> <input class="btn btn-default slider-down" type="button" value="➖"> <input class="btn btn-default slider-set" type="button" value="Lo" data-set="25"> <input class="btn btn-default slider-set" type="button" value="Hi" data-set="75"> <input class="btn btn-default slider-up" type="button" value="➕"> </div> <input class="slider-input" type="range"> </div> <br/> </div> <div class="col-md-3"> <p><u>Events & values</u>:</p> <pre id="show-sldev"></pre> </div> </div> <br/> <p> Checkbox, buttons and unit are optional. You can reduce the widget to just a number or just a range input, the input then needs to have the <code>slider-input</code> class. </p> <p> The checkbox element defines the default value to be set on unchecking in <code>data-default</code>. By default, the checkbox will restore the previous user value when re-checked, to disable this, set <code>data-reset</code> to "true". To reset the value to the default from a script, call the <code>.slider()</code> method with <code>value: null</code> (this resets both the actual and the stored user value). </p> <p> Values and checkbox status need to be consistent on init, or be set by your script. To hook into value changes, attach event handlers to events <code>input</code> and/or <code>change</code> as usual. Read the <code>checked</code> property to get the checkbox state. </p> </div> </div> <script> (function(){ /* Show page source: */ var pagesrc = $('#main').html(); $('.panel-heading').prepend('<button type="button" class="btn btn-sm btn-info action-showsrc"' + ' style="float:right; position:relative; top:-5px;">Show page source</button>'); $('.action-showsrc').on('click', function() { $('<div/>').dialog({ title: 'Source Code', body: '<pre style="font-size:85%; height:calc(100vh - 230px);">' + encode_html(pagesrc) + '</pre>', size: 'lg', }); }); /* Init sliders: */ $('.slider').slider(); $('#sld2').slider({ min:-10, max:10, step:0.1, default:2.5, unit:'kW', checked:false, value:-3.8 }); /* Show slider events & values: */ var sldev = {}; $('#input-sld1, #input-sld2, #input-sld3').on('input change', function(ev) { sldev[this.name] = $.extend(sldev[this.name], { checked: this.checked }); // Note: this.value is unvalidated here for a direct entry, but the validation is simple: sldev[this.name][ev.type] = Math.max(this.min, Math.min(this.max, 1*this.value)); $('#show-sldev').text(JSON.stringify(sldev, null, 2)); }); })(); </script> |