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Adding new function to move sliders from the outside #3

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Adding new function to move sliders from the outside #3

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10e8405
Added new slide_to function to control sliders from the outside (e.g.…
Nov 20, 2013
7a1a320
Update index.html
lukius Nov 20, 2013
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31 changes: 22 additions & 9 deletions d3.slider.js
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ d3.slider = function module() {
axis = false,
margin = 50,
value,
div,
scale;

// Private variables
Expand All @@ -38,7 +39,7 @@ d3.slider = function module() {
value = value || scale.domain()[0];

// DIV container
var div = d3.select(this).classed("d3-slider d3-slider-" + orientation, true);
div = d3.select(this).classed("d3-slider d3-slider-" + orientation, true);

var drag = d3.behavior.drag();

Expand Down Expand Up @@ -135,9 +136,13 @@ d3.slider = function module() {


// Move slider handle on click/drag
function moveHandle(pos) {

var newValue = stepValue(scale.invert(pos / sliderLength));
function moveHandle(pos, val) {
var newValue;

if(typeof val != "undefined")
newValue = val;
else
newValue = stepValue(scale.invert(pos / sliderLength));

if (value !== newValue) {
var oldPos = formatPercent(scale(stepValue(value))),
Expand Down Expand Up @@ -173,12 +178,12 @@ d3.slider = function module() {
}


function onClickHorizontal() {
moveHandle(d3.event.offsetX || d3.event.layerX);
function onClickHorizontal(val) {
moveHandle(d3.event.offsetX || d3.event.layerX, val);
}

function onClickVertical() {
moveHandle(sliderLength - d3.event.offsetY || d3.event.layerY);
function onClickVertical(val) {
moveHandle(sliderLength - d3.event.offsetY || d3.event.layerY, val);
}

function onDragHorizontal() {
Expand Down Expand Up @@ -250,7 +255,15 @@ d3.slider = function module() {
if (!arguments.length) return scale;
scale = _;
return slider;
}
}

slider.slide_to = function(newValue) {
if(newValue > max)
newValue = max;
else if(newValue < min)
newValue = min;
div.on("click")(newValue);
}

d3.rebind(slider, dispatch, "on");

Expand Down
12 changes: 12 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,13 @@ <h1>D3.js Slider Examples</h1>
<h2>Default slider</h2>
<code>d3.slider()</code>
<div id="slider1"></div>

<h2>Slider controlled from an external <span id="slider-button"><input type='button' value='button'/></span></h2></h2>
<code>var slider = d3.slider().axis(true);<br>
var pos = 0;<br>
d3.select('#slider-button').on('click', function() { slider.slide_to(++pos); });
</code>
<div id="slider_b"></div>

<h2>Slider with start value</h2>
<code>d3.slider().value(25)</code>
Expand Down Expand Up @@ -76,6 +83,11 @@ <h2>Vertical slider</h2>
<script>

d3.select('#slider1').call(d3.slider());

var slider = d3.slider().axis(true);
var pos = 0;
d3.select('#slider-button').on('click', function() { slider.slide_to(++pos); });
d3.select('#slider_b').call(slider);

d3.select('#slider2').call(d3.slider().value(25));

Expand Down