function RangeFacet(div, config, options) {
this._div = div;
this._config = config;
this._options = options;
this._from = ("from" in this._config) ? this._config.from : null;
this._to = ("to" in this._config) ? this._config.to : null;
this._error = false;
this._initializedUI = false;
}
RangeFacet.prototype._setDefaults = function() {
switch (this._config.mode) {
case "min":
this._from = this._config.min;
break;
case "max":
this._to = this._config.max;
break;
default:
this._from = this._config.min;
this._to = this._config.max;
}
};
RangeFacet.reconstruct = function(div, uiState) {
return new RangeFacet(div, uiState.c, uiState.o);
};
RangeFacet.prototype.getUIState = function() {
var json = {
c: this.getJSON(),
o: this._options
};
return json;
}
RangeFacet.prototype.getJSON = function() {
var o = {
type: "range",
name: this._config.name,
mode: this._config.mode,
expression: this._config.expression,
columnName: this._config.columnName
};
if (this._config.mode == "min" || this._config.mode == "range") {
if (this._from != null) {
o.from = this._from;
}
}
if (this._config.mode == "max" || this._config.mode == "range") {
if (this._to != null) {
o.to = this._to;
}
}
return o;
};
RangeFacet.prototype.hasSelection = function() {
switch (this._config.mode) {
case "min":
return this._from != null && (!this._initializedUI || this._from > this._config.min);
case "max":
return this._to != null && (!this._initializedUI || this._to < this._config.max);
default:
return (this._from != null && (!this._initializedUI || this._from > this._config.min)) ||
(this._to != null && (!this._initializedUI || this._to < this._config.max));
}
};
RangeFacet.prototype._initializeUI = function() {
var self = this;
var container = this._div.empty();
var headerDiv = $('
').addClass("facet-title").appendTo(container);
$('').text(this._config.name).appendTo(headerDiv);
var resetButton = $('').addClass("facet-choice-link").text("reset").click(function() {
switch (self._config.mode) {
case "min":
self._from = self._config.min;
self._sliderDiv.slider("value", self._from);
break;
case "max":
self._to = self._config.max;
self._sliderDiv.slider("value", self._to);
break;
default:
self._from = self._config.min;
self._to = self._config.max;
self._sliderDiv.slider("values", 0, self._from);
self._sliderDiv.slider("values", 1, self._to);
}
self._setRangeIndicators();
self._updateRest();
}).prependTo(headerDiv);
var removeButton = $('
')
.attr("src", "images/close.png")
.attr("title", "Remove this facet")
.addClass("facet-choice-link")
.click(function() {
self._remove();
}).prependTo(headerDiv);
var bodyDiv = $('').addClass("facet-range-body").appendTo(container);
if (this._error) {
return;
}
this._histogramDiv = $('').addClass("facet-range-histogram").appendTo(bodyDiv);
this._sliderDiv = $('').addClass("facet-range-slider").appendTo(bodyDiv);
this._statusDiv = $('').addClass("facet-range-status").appendTo(bodyDiv);
var onSlide = function(event, ui) {
switch (self._config.mode) {
case "min":
self._from = ui.value;
break;
case "max":
self._to = ui.value;
break;
default:
self._from = ui.values[0];
self._to = ui.values[1];
}
self._setRangeIndicators();
self._updateRest();
};
var sliderConfig = {
range: "max",
min: this._config.min,
max: this._config.max,
value: 2,
stop: onSlide
};
if ("step" in this._config) {
sliderConfig.step = this._config.step;
}
switch (this._config.mode) {
case "min":
sliderConfig.range = "max";
sliderConfig.value = this._from;
break;
case "max":
sliderConfig.range = "min";
sliderConfig.value = this._to;
break;
default:
sliderConfig.range = true;
sliderConfig.values = [ this._from, this._to ];
}
this._sliderDiv.slider(sliderConfig);
this._setRangeIndicators();
};
RangeFacet.prototype._setRangeIndicators = function() {
var text;
switch (this._config.mode) {
case "min":
text = "At least " + this._from;
break;
case "max":
text = "At most " + this._to;
break;
default:
text = this._from + " to " + this._to;
}
this._statusDiv.text(text);
};
RangeFacet.prototype.updateState = function(data) {
if ("min" in data && "max" in data) {
this._config.min = data.min;
this._config.max = data.max;
this._config.step = data.step;
this._baseBins = data.baseBins;
this._bins = data.bins;
switch (this._config.mode) {
case "min":
this._from = Math.max(data.from, this._config.min);
break;
case "max":
this._to = Math.min(data.to, this._config.max);
break;
default:
this._from = Math.max(data.from, this._config.min);
if ("to" in data) {
this._to = Math.min(data.to, this._config.max);
} else {
this._to = data.max;
}
}
} else {
this._error = true;
}
this.render();
};
RangeFacet.prototype.render = function() {
if (!this._initializedUI) {
this._initializeUI();
this._initializedUI = true;
}
if (this._error) {
return;
}
this._sliderDiv.slider("option", "min", this._config.min);
this._sliderDiv.slider("option", "max", this._config.max);
this._sliderDiv.slider("option", "step", this._config.step);
var max = 0;
for (var i = 0; i < this._baseBins.length; i++) {
max = Math.max(max, this._baseBins[i]);
}
if (max == 0) {
this._histogramDiv.hide();
} else {
var values = [];
var diffs = [];
for (var i = 0; i < this._baseBins.length; i++) {
var v = Math.ceil(100 * this._bins[i] / max);
var diff = Math.ceil(100 * this._baseBins[i] / max) - v;
values.push(v == 0 ? 0 : Math.max(2, v)); // use min 2 to make sure something shows up
diffs.push(diff == 0 ? 0 : Math.max(2, diff));
}
this._histogramDiv.empty().show();
$('
').attr("src",
"http://chart.apis.google.com/chart?" + [
"chs=" + this._histogramDiv[0].offsetWidth + "x50",
//"cht=ls&chm=o,ff6600,0,-1,3&chls=0", // use for line plot
"cht=bvs&chbh=r,0&chco=000088,aaaaff", // use for histogram
"chd=t:" + values.join(",") + "|" + diffs.join(",")
].join("&")
).appendTo(this._histogramDiv);
}
this._setRangeIndicators();
};
RangeFacet.prototype._reset = function() {
this._setDefaults();
this._updateRest();
};
RangeFacet.prototype._remove = function() {
ui.browsingEngine.removeFacet(this);
this._div = null;
this._config = null;
this._data = null;
};
RangeFacet.prototype._updateRest = function() {
Gridworks.update({ engineChanged: true });
};