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ng-knob.js
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ng-knob.js
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/*******************************************************
* Name: ng-knob
* Description: Angular.js Knob directive
* Version: 0.1.4
* Homepage: https://radmie.github.io/ng-knob
* Licence: MIT
*******************************************************/
"use strict";
(function() {
var ui = {};
var Knob = function(element, value, options) {
this.element = element;
this.value = value;
this.options = options;
this.inDrag = false;
};
Knob.prototype.valueToRadians = function(value, valueEnd, angleEnd, angleStart, valueStart) {
valueEnd = valueEnd || 100;
valueStart = valueStart || 0;
angleEnd = angleEnd || 360;
angleStart = angleStart || 0;
return Math.PI / 180 * ((value - valueStart) * (angleEnd - angleStart) / (valueEnd - valueStart) + angleStart);
};
Knob.prototype.radiansToValue = function(radians, valueEnd, valueStart, angleEnd, angleStart) {
valueEnd = valueEnd || 100;
valueStart = valueStart || 0;
angleEnd = angleEnd || 360;
angleStart = angleStart || 0;
return (180 / Math.PI * radians - angleStart) * (valueEnd - valueStart) / (angleEnd - angleStart) + valueStart;
};
Knob.prototype.createArc = function(innerRadius, outerRadius, startAngle, endAngle, cornerRadius) {
var arc = d3.svg.arc().innerRadius(innerRadius).outerRadius(outerRadius).startAngle(startAngle).endAngle(endAngle).cornerRadius(cornerRadius);
return arc;
};
Knob.prototype.drawArc = function(svg, arc, label, style, click, drag) {
var elem = svg.append("path").attr("id", label).attr("d", arc).style(style).attr("transform", "translate(" + this.options.size / 2 + ", " + this.options.size / 2 + ")");
if (this.options.readOnly === false) {
if (click) {
elem.on("click", click);
}
if (drag) {
elem.call(drag);
}
}
return elem;
};
Knob.prototype.createArcs = function() {
var outerRadius = parseInt(this.options.size / 2, 10), startAngle = this.valueToRadians(this.options.startAngle, 360), endAngle = this.valueToRadians(this.options.endAngle, 360);
if (this.options.scale.enabled) {
outerRadius -= this.options.scale.width + this.options.scale.spaceWidth;
}
var trackInnerRadius = outerRadius - this.options.trackWidth, changeInnerRadius = outerRadius - this.options.barWidth, valueInnerRadius = outerRadius - this.options.barWidth, interactInnerRadius = 1, trackOuterRadius = outerRadius, changeOuterRadius = outerRadius, valueOuterRadius = outerRadius, interactOuterRadius = outerRadius, diff;
if (this.options.barWidth > this.options.trackWidth) {
diff = (this.options.barWidth - this.options.trackWidth) / 2;
trackInnerRadius -= diff;
trackOuterRadius -= diff;
} else if (this.options.barWidth < this.options.trackWidth) {
diff = (this.options.trackWidth - this.options.barWidth) / 2;
changeOuterRadius -= diff;
valueOuterRadius -= diff;
changeInnerRadius -= diff;
valueInnerRadius -= diff;
}
if (this.options.bgColor) {
if (this.options.bgFull) {
this.bgArc = this.createArc(0, outerRadius, 0, Math.PI * 2);
} else {
this.bgArc = this.createArc(0, outerRadius, startAngle, endAngle);
}
}
if (this.options.skin.type === "tron") {
trackOuterRadius = trackOuterRadius - this.options.skin.width - this.options.skin.spaceWidth;
changeOuterRadius = changeOuterRadius - this.options.skin.width - this.options.skin.spaceWidth;
valueOuterRadius = valueOuterRadius - this.options.skin.width - this.options.skin.spaceWidth;
interactOuterRadius = interactOuterRadius - this.options.skin.width - this.options.skin.spaceWidth;
this.hoopArc = this.createArc(outerRadius - this.options.skin.width, outerRadius, startAngle, endAngle);
}
this.trackArc = this.createArc(trackInnerRadius, trackOuterRadius, startAngle, endAngle, this.options.trackCap);
this.changeArc = this.createArc(changeInnerRadius, changeOuterRadius, startAngle, startAngle, this.options.barCap);
this.valueArc = this.createArc(valueInnerRadius, valueOuterRadius, startAngle, startAngle, this.options.barCap);
this.interactArc = this.createArc(interactInnerRadius, interactOuterRadius, startAngle, endAngle);
};
Knob.prototype.drawArcs = function(clickInteraction, dragBehavior) {
var svg = d3.select(this.element).append("svg").attr("width", this.options.size).attr("height", this.options.size);
if (this.options.bgColor) {
this.drawArc(svg, this.bgArc, "bgArc", {
fill: this.options.bgColor
});
}
if (this.options.displayInput) {
var fontSize = this.options.size * .2 + "px";
if (this.options.fontSize !== "auto") {
fontSize = this.options.fontSize + "px";
}
if (this.options.step < 1) {
this.value = this.value.toFixed(1);
}
var v = this.value;
if (typeof this.options.inputFormatter === "function") {
v = this.options.inputFormatter(v);
}
svg.append("text").attr("id", "text").attr("text-anchor", "middle").attr("font-size", fontSize).style("fill", this.options.textColor).text(v + this.options.unit || "").attr("transform", "translate(" + this.options.size / 2 + ", " + (this.options.size / 2 + this.options.size * .06) + ")");
if (this.options.subText.enabled) {
fontSize = this.options.size * .07 + "px";
if (this.options.subText.font !== "auto") {
fontSize = this.options.subText.font + "px";
}
svg.append("text").attr("class", "sub-text").attr("text-anchor", "middle").attr("font-size", fontSize).style("fill", this.options.subText.color).text(this.options.subText.text).attr("transform", "translate(" + this.options.size / 2 + ", " + (this.options.size / 2 + this.options.size * .15) + ")");
}
}
if (this.options.scale.enabled) {
var radius, quantity, count = 0, angle = 0, data, startRadians = this.valueToRadians(this.options.min, this.options.max, this.options.endAngle, this.options.startAngle, this.options.min), endRadians = this.valueToRadians(this.options.max, this.options.max, this.options.endAngle, this.options.startAngle, this.options.min), diff = 0;
if (this.options.startAngle !== 0 || this.options.endAngle !== 360) {
diff = 1;
}
if (this.options.scale.type === "dots") {
var width = this.options.scale.width;
radius = this.options.size / 2 - width;
quantity = this.options.scale.quantity;
var offset = radius + this.options.scale.width;
data = d3.range(quantity).map(function() {
angle = count * (endRadians - startRadians) - Math.PI / 2 + startRadians;
count = count + 1 / (quantity - diff);
return {
cx: offset + Math.cos(angle) * radius,
cy: offset + Math.sin(angle) * radius,
r: width
};
});
svg.selectAll("circle").data(data).enter().append("circle").attr({
r: function(d) {
return d.r;
},
cx: function(d) {
return d.cx;
},
cy: function(d) {
return d.cy;
},
fill: this.options.scale.color
});
} else if (this.options.scale.type === "lines") {
var height = this.options.scale.height;
radius = this.options.size / 2;
quantity = this.options.scale.quantity;
data = d3.range(quantity).map(function() {
angle = count * (endRadians - startRadians) - Math.PI / 2 + startRadians;
count = count + 1 / (quantity - diff);
return {
x1: radius + Math.cos(angle) * radius,
y1: radius + Math.sin(angle) * radius,
x2: radius + Math.cos(angle) * (radius - height),
y2: radius + Math.sin(angle) * (radius - height)
};
});
svg.selectAll("line").data(data).enter().append("line").attr({
x1: function(d) {
return d.x1;
},
y1: function(d) {
return d.y1;
},
x2: function(d) {
return d.x2;
},
y2: function(d) {
return d.y2;
},
"stroke-width": this.options.scale.width,
stroke: this.options.scale.color
});
}
}
if (this.options.skin.type === "tron") {
this.drawArc(svg, this.hoopArc, "hoopArc", {
fill: this.options.skin.color
});
}
this.drawArc(svg, this.trackArc, "trackArc", {
fill: this.options.trackColor
});
if (this.options.displayPrevious) {
this.changeElem = this.drawArc(svg, this.changeArc, "changeArc", {
fill: this.options.prevBarColor
});
} else {
this.changeElem = this.drawArc(svg, this.changeArc, "changeArc", {
"fill-opacity": 0
});
}
this.valueElem = this.drawArc(svg, this.valueArc, "valueArc", {
fill: this.options.barColor
});
var cursor = "pointer";
if (this.options.readOnly) {
cursor = "default";
}
this.drawArc(svg, this.interactArc, "interactArc", {
"fill-opacity": 0,
cursor: cursor
}, clickInteraction, dragBehavior);
};
Knob.prototype.draw = function(update) {
d3.select(this.element).select("svg").remove();
var that = this;
that.createArcs();
var dragBehavior = d3.behavior.drag().on("drag", dragInteraction).on("dragend", clickInteraction);
that.drawArcs(clickInteraction, dragBehavior);
if (that.options.animate.enabled) {
that.valueElem.transition().ease(that.options.animate.ease).duration(that.options.animate.duration).tween("", function() {
var i = d3.interpolate(that.valueToRadians(that.options.startAngle, 360), that.valueToRadians(that.value, that.options.max, that.options.endAngle, that.options.startAngle, that.options.min));
return function(t) {
var val = i(t);
that.valueElem.attr("d", that.valueArc.endAngle(val));
that.changeElem.attr("d", that.changeArc.endAngle(val));
};
});
} else {
that.changeArc.endAngle(this.valueToRadians(this.value, this.options.max, this.options.endAngle, this.options.startAngle, this.options.min));
that.changeElem.attr("d", that.changeArc);
that.valueArc.endAngle(this.valueToRadians(this.value, this.options.max, this.options.endAngle, this.options.startAngle, this.options.min));
that.valueElem.attr("d", that.valueArc);
}
function dragInteraction() {
that.inDrag = true;
var x = d3.event.x - that.options.size / 2;
var y = d3.event.y - that.options.size / 2;
interaction(x, y, false);
}
function clickInteraction() {
that.inDrag = false;
var coords = d3.mouse(this.parentNode);
var x = coords[0] - that.options.size / 2;
var y = coords[1] - that.options.size / 2;
interaction(x, y, true);
}
function interaction(x, y, isFinal) {
var arc = Math.atan(y / x) / (Math.PI / 180), radians, delta;
if (x >= 0 && y <= 0 || x >= 0 && y >= 0) {
delta = 90;
} else {
delta = 270;
if (that.options.startAngle < 0) {
delta = -90;
}
}
radians = (delta + arc) * (Math.PI / 180);
that.value = that.radiansToValue(radians, that.options.max, that.options.min, that.options.endAngle, that.options.startAngle);
if (that.value >= that.options.min && that.value <= that.options.max) {
that.value = Math.round(~~((that.value < 0 ? -.5 : .5) + that.value / that.options.step) * that.options.step * 100) / 100;
if (that.options.step < 1) {
that.value = that.value.toFixed(1);
}
update(that.value);
that.valueArc.endAngle(that.valueToRadians(that.value, that.options.max, that.options.endAngle, that.options.startAngle, that.options.min));
that.valueElem.attr("d", that.valueArc);
if (isFinal) {
that.changeArc.endAngle(that.valueToRadians(that.value, that.options.max, that.options.endAngle, that.options.startAngle, that.options.min));
that.changeElem.attr("d", that.changeArc);
}
if (that.options.displayInput) {
var v = that.value;
if (typeof that.options.inputFormatter === "function") {
v = that.options.inputFormatter(v);
}
d3.select(that.element).select("#text").text(v + that.options.unit || "");
}
}
}
};
Knob.prototype.setValue = function(newValue) {
if (!this.inDrag && this.value >= this.options.min && this.value <= this.options.max) {
var radians = this.valueToRadians(newValue, this.options.max, this.options.endAngle, this.options.startAngle, this.options.min);
this.value = Math.round(~~((newValue < 0 ? -.5 : .5) + newValue / this.options.step) * this.options.step * 100) / 100;
if (this.options.step < 1) {
this.value = this.value.toFixed(1);
}
this.changeArc.endAngle(radians);
d3.select(this.element).select("#changeArc").attr("d", this.changeArc);
this.valueArc.endAngle(radians);
d3.select(this.element).select("#valueArc").attr("d", this.valueArc);
if (this.options.displayInput) {
var v = this.value;
if (typeof this.options.inputFormatter === "function") {
v = this.options.inputFormatter(v);
}
d3.select(this.element).select("#text").text(v + this.options.unit || "");
}
}
};
ui.Knob = Knob;
ui.knobDirective = function() {
return {
restrict: "E",
scope: {
value: "=",
options: "="
},
link: function(scope, element) {
scope.value = scope.value || 0;
var defaultOptions = {
skin: {
type: "simple",
width: 10,
color: "rgba(255,0,0,.5)",
spaceWidth: 5
},
animate: {
enabled: true,
duration: 1e3,
ease: "bounce"
},
size: 200,
startAngle: 0,
endAngle: 360,
unit: "",
displayInput: true,
inputFormatter: function(v) {
return v;
},
readOnly: false,
trackWidth: 50,
barWidth: 50,
trackColor: "rgba(0,0,0,0)",
barColor: "rgba(255,0,0,.5)",
prevBarColor: "rgba(0,0,0,0)",
textColor: "#222",
barCap: 0,
trackCap: 0,
fontSize: "auto",
subText: {
enabled: false,
text: "",
color: "gray",
font: "auto"
},
bgColor: "",
bgFull: false,
scale: {
enabled: false,
type: "lines",
color: "gray",
width: 4,
quantity: 20,
height: 10,
spaceWidth: 15
},
step: 1,
displayPrevious: false,
min: 0,
max: 100,
dynamicOptions: false
};
scope.options = angular.merge(defaultOptions, scope.options);
var knob = new ui.Knob(element[0], scope.value, scope.options);
scope.$watch("value", function(newValue, oldValue) {
if ((newValue !== null || typeof newValue !== "undefined") && typeof oldValue !== "undefined" && newValue !== oldValue) {
knob.setValue(newValue);
}
});
if (scope.options.dynamicOptions) {
var isFirstWatchOnOptions = true;
scope.$watch("options", function() {
if (isFirstWatchOnOptions) {
isFirstWatchOnOptions = false;
} else {
var newOptions = angular.merge(defaultOptions, scope.options);
knob = new ui.Knob(element[0], scope.value, newOptions);
drawKnob();
}
}, true);
}
var drawKnob = function() {
knob.draw(function(value) {
scope.$apply(function() {
scope.value = value;
});
});
};
drawKnob();
}
};
};
angular.module("ui.knob", []).directive("uiKnob", ui.knobDirective);
})();