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Donut #276

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Donut #276

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e350007
Extends Pie graph type to allow custom series text
zrgravity May 20, 2014
85c5fcd
Build files after pie labels updated (see prev commit)
zrgravity May 20, 2014
8cde7de
Merge pull request #1 from OklahomaChristian/pie-labels
zrgravity May 20, 2014
71e0ce0
Fix defaultPieLabelFormatter and build
zrgravity May 21, 2014
1576fe9
Add donut type and build
zrgravity May 21, 2014
7c95ae7
Donut graph and build
zrgravity May 22, 2014
17bf2ba
Add transparency support and build
zrgravity May 22, 2014
c4777f5
Donut - only plot sections with a positive value
zrgravity May 22, 2014
f2867dc
Add status graph title code
zrgravity May 27, 2014
1968f1f
Build
zrgravity May 27, 2014
7f75de1
Prevent labels from overlapping
zrgravity May 28, 2014
e67bfcd
Build
zrgravity May 28, 2014
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322 changes: 316 additions & 6 deletions flotr2.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2609,6 +2609,7 @@ Graph.prototype = {
textEnabled : this.textEnabled,
htmlText : this.options.HtmlText,
text : this._text, // TODO Is this necessary?
labelText : series.label,
element : this.el,
data : series.data,
color : series.color,
Expand All @@ -2622,10 +2623,21 @@ Graph.prototype = {
options = flotr.merge(type, options);

// Fill
options.fillStyle = this.processColor(
type.fillColor || series.color,
{opacity: type.fillOpacity}
);
var color = type.fillColor || series.color;
var colorType = color.substring( 0, color.indexOf('('));
if (colorType == 'rgba') {
// Color already has alpha, use it
var colorAlpha = color.substring( color.lastIndexOf(',')+1, color.lastIndexOf(')')).replace(/ /g,''); // Get the alpha value (if it exists), and remove whitespace
options.fillStyle = this.processColor(
color,
{opacity: colorAlpha}
);
} else {
options.fillStyle = this.processColor(
color,
{opacity: type.fillOpacity}
);
}

return options;
},
Expand Down Expand Up @@ -4765,7 +4777,7 @@ function isImage (i) {
var
_ = Flotr._;

Flotr.defaultPieLabelFormatter = function (total, value) {
Flotr.defaultPieLabelFormatter = function (total, value, labelText) {
return (100 * value / total).toFixed(2)+'%';
};

Expand Down Expand Up @@ -4809,7 +4821,8 @@ Flotr.addType('pie', {
startAngle = this.startAngle || (2 * Math.PI * options.startAngle), // TODO: this initial startAngle is already in radians (fixing will be test-unstable)
endAngle = startAngle + measure,
bisection = startAngle + measure / 2,
label = options.labelFormatter(this.total, value),
//label = options.labelFormatter(this.total, value),
label = options.labelFormatter(this.total, value, options.labelText),
//plotTickness = Math.sin(series.pie.viewAngle)*series.pie.spliceThickness / vScale;
explodeCoeff = explode + radius + 4,
distX = Math.cos(bisection) * explodeCoeff,
Expand Down Expand Up @@ -4968,6 +4981,262 @@ Flotr.addType('pie', {
});
})();

/**
* Donut
*
* Formats the donuts labels.
* @param {Object} slice - Slice object
* @return {String} Formatted donut label string
*/
(function () {

var
_ = Flotr._;

Flotr.defaultDonutLabelFormatter = function (total, value, labelText) {
return (100 * value / total).toFixed(2)+'%';
};

Flotr.addType('donut', {
options: {
show: false, // => setting to true will show bars, false will hide
lineWidth: 1, // => in pixels
fill: true, // => true to fill the area from the line to the x axis, false for (transparent) no fill
fillColor: null, // => fill color
fillOpacity: 0.6, // => opacity of the fill color, set to 1 for a solid fill, 0 hides the fill
explode: 6, // => the number of pixels the splices will be far from the center
sizeRatio: 0.6, // => the size ratio of the donut relative to the plot
startAngle: Math.PI/4, // => the first slice start angle
labelFormatter: Flotr.defaultDonutLabelFormatter,
epsilon: 0.1, // => how close do you have to get to hit empty slice
sliceThickness: 20 // => thickness of each slice in the donut
},

startAngle: [],
total: [],

draw : function (options) {

var startAngle = [];
var endAngle = [];

var
data = options.data,
context = options.context,
lineWidth = options.lineWidth,
shadowSize = options.shadowSize,
sizeRatio = options.sizeRatio,
height = options.height,
width = options.width,
explode = options.explode,
color = options.color,
fill = options.fill,
fillStyle = options.fillStyle,
radius = Math.min(width, height) * sizeRatio / 2,
thickness = options.sliceThickness,
value = data[0][1],
layer = data[0][0],
html = [],
vScale = 1,
measure = Math.PI * 2 * value / this.total[layer];
startAngle[layer] = this.startAngle[layer] || (2 * Math.PI * options.startAngle); // TODO: this initial startAngle is already in radians (fixing will be test-unstable)
endAngle[layer] = startAngle[layer] + measure;
var
bisection = startAngle[layer] + measure / 2,
label = options.labelFormatter(this.total[layer], value, options.labelText),
explodeCoeff = explode + radius + 4,
distX = Math.cos(bisection) * explodeCoeff,
distY = Math.sin(bisection) * explodeCoeff,
textAlign = distX < 0 ? 'right' : 'left',
textBaseline = distY > 0 ? 'top' : 'bottom',
style,
x, y;

context.save();
context.translate(width / 2, height / 2);
context.scale(1, vScale);

x = Math.cos(bisection) * explode;
y = Math.sin(bisection) * explode;

// Shadows
if (shadowSize > 0) {
this.plotSlice(x + shadowSize, y + shadowSize, radius, thickness, layer, startAngle[layer], endAngle[layer], context);
if (fill) {
context.fillStyle = 'rgba(0,0,0,0.1)';
context.fill();
}
}

if (value > 0) {
this.plotSlice(x, y, radius, thickness, layer, startAngle[layer], endAngle[layer], context);
if (fill) {
context.fillStyle = fillStyle;
context.fill();
}
context.lineWidth = lineWidth;
context.strokeStyle = color;
context.stroke();
}

style = {
size : options.fontSize * 1.2,
color : options.fontColor,
weight : 1.5
};

if (label) {
if (options.htmlText || !options.textEnabled) {
// iterate through slices and check for overlap
_.each(this.slices, function (slice){
// Get old bisection
sliceBisect = slice.start + (slice.end-slice.start) / 2;
// Check if close
if (sliceBisect-bisection < 0 && sliceBisect-bisection > -0.3) {
// Values close, move bisection up
bisection += 0.3;
adjustValues();
} else if (sliceBisect-bisection < 0.3 && sliceBisect-bisection >= 0) {
// Values close, move bisection down
bisection -= 0.3;
adjustValues();
}

function adjustValues() {
// Adjust new values
distX = Math.cos(bisection) * explodeCoeff;
distY = Math.sin(bisection) * explodeCoeff;
textAlign = distX < 0 ? 'right' : 'left';
textBaseline = distY > 0 ? 'top' : 'bottom';
}
});

divStyle = 'position:absolute;' + textBaseline + ':' + (height / 2 + (textBaseline === 'top' ? distY : -distY)) + 'px;';
divStyle += textAlign + ':' + (width / 2 + (textAlign === 'right' ? -distX : distX)) + 'px;';
html.push('<div style="', divStyle, '" class="flotr-grid-label">', label, '</div>');
}
else {
style.textAlign = textAlign;
style.textBaseline = textBaseline;
Flotr.drawText(context, label, distX, distY, style);
}
}

if (options.htmlText || !options.textEnabled) {
var div = Flotr.DOM.node('<div style="color:' + options.fontColor + '" class="flotr-labels"></div>');
Flotr.DOM.insert(div, html.join(''));
Flotr.DOM.insert(options.element, div);
}

context.restore();

// New start angle
this.startAngle[layer] = endAngle[layer];
this.slices = this.slices || [];
this.slices.push({
radius : radius,
x : x,
y : y,
explode : explode,
start : startAngle[layer],
end : endAngle[layer]
});
},
plotSlice : function (x, y, radius, thickness, layer, startAngle, endAngle, context) {
// Start path
context.beginPath();
// Move to inside arc start pt
context.moveTo(x+Math.cos(startAngle)*(radius-thickness*(layer+1)), y+Math.sin(startAngle)*(radius-thickness*(layer+1)));
// Line to outside arc start pt
context.lineTo(x+Math.cos(startAngle)*(radius-thickness*(layer)), y+Math.sin(startAngle)*(radius-thickness*(layer)));
// Outside arc
context.arc(x, y, radius-thickness*(layer), startAngle, endAngle, false);
// Line to inside arc end pt
context.lineTo(x+Math.cos(endAngle)*(radius-thickness*(layer+1)), y+Math.sin(endAngle)*(radius-thickness*(layer+1)));
// Inside arc
context.arc(x, y, radius-thickness*(layer+1), endAngle, startAngle, true);
// Close
context.closePath();
},
hit : function (options) {

var
data = options.data[0],
args = options.args,
index = options.index,
mouse = args[0],
n = args[1],
slice = this.slices[index],
x = mouse.relX - options.width / 2,
y = mouse.relY - options.height / 2,
r = Math.sqrt(x * x + y * y),
theta = Math.atan(y / x),
circle = Math.PI * 2,
explode = slice.explode || options.explode,
start = slice.start % circle,
end = slice.end % circle,
epsilon = options.epsilon;

if (x < 0) {
theta += Math.PI;
} else if (x > 0 && y < 0) {
theta += circle;
}

if (r < slice.radius + explode && r > explode) {
if (
(theta > start && theta < end) || // Normal Slice
(start > end && (theta < end || theta > start)) || // First slice
// TODO: Document the two cases at the end:
(start === end && ((slice.start === slice.end && Math.abs(theta - start) < epsilon) || (slice.start !== slice.end && Math.abs(theta-start) > epsilon)))
) {

// TODO Decouple this from hit plugin (chart shouldn't know what n means)
n.x = data[0];
n.y = data[1];
n.sAngle = start;
n.eAngle = end;
n.index = 0;
n.seriesIndex = index;
n.fraction = data[1] / this.total[layer];
}
}
},
drawHit: function (options) {
var
context = options.context,
slice = this.slices[options.args.seriesIndex];

context.save();
context.translate(options.width / 2, options.height / 2);
this.plotSlice(slice.x, slice.y, slice.radius, thickness, layer, slice.start, slice.end, context);
context.stroke();
context.restore();
},
clearHit : function (options) {
var
context = options.context,
slice = this.slices[options.args.seriesIndex],
padding = 2 * options.lineWidth,
radius = slice.radius + padding;

context.save();
context.translate(options.width / 2, options.height / 2);
context.clearRect(
slice.x - radius,
slice.y - radius,
2 * radius + padding,
2 * radius + padding
);
context.restore();
},
extendYRange : function (axis, data) {
var layer = data[0][0];
this.total[layer] = (this.total[layer] || 0) + data[0][1];
}
});
})();

/** Points **/
Flotr.addType('points', {
options: {
Expand Down Expand Up @@ -7205,3 +7474,44 @@ Flotr.addPlugin('titles', {
}
});
})();

(function () {

var D = Flotr.DOM;

Flotr.addPlugin('statusGraphTitle', {
callbacks: {
'flotr:afterdraw': function() {
this.statusGraphTitle.drawStatusTitle();
}
},
/**
* Draws the title
*/
drawStatusTitle : function () {
var
options = this.options,
margin = options.grid.labelMargin,
ctx = this.ctx,
a = this.axes;

var style = {
size: options.statusGraphTitle.fontSize,
color: options.statusGraphTitle.color,
textAlign: 'center',
weight: 1.5,
textBaseline: 'middle'
};

// Draw text
if (options.statusGraphTitle.text) {
Flotr.drawText(
ctx, options.statusGraphTitle.text,
this.plotOffset.left + this.plotWidth/2,
this.plotHeight/2,
style
);
}
}
});
})();
2 changes: 1 addition & 1 deletion flotr2.min.js
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