How does google-visualization-tooltip calculate the left and top values? - charts

How does google-visualization-tooltip calculate the left and top values for style ?
example - on debugging i can see that :-
<div class="google-visualization-tooltip" style="width: 1px; height: 0px; left: 453.25px; top: 44.91px;"</div>
How can i calculate this relatively, so that the tooltip shows on top and is center aligned to the point that is hovered upon, irrespective of the width of the element?

most charts in the 'corechart' package,
have methods for getting the position of various chart elements.
first, get the chart's layout interface...
var chartLayout = chart.getChartLayoutInterface();
the layout interface has method --> getBoundingBox(id)
where id is a string id of the chart element.
to find the position of a point, use this format for id --> point#series#row -- point#0#0
we can use chart event onmouseover to know when a point has been hovered,
and the tooltip is being shown.
the onmouseover event sends an argument with the row and column from the data table,
of the point that is being hovered.
as such, we can get the layout, find the point, and position the tooltip.
google.visualization.events.addListener(chart, 'onmouseover', function (sender) {
// ensure point is hovered
if (sender.row !== null) {
var padding = 16;
var chartLayout = chart.getChartLayoutInterface();
var pointBounds = chartLayout.getBoundingBox('point#' + (sender.column - 1) + '#' + sender.row);
var tooltip = chart.getContainer().getElementsByClassName('google-visualization-tooltip');
if (tooltip.length > 0) {
var tooltipBounds = tooltip[0].getBoundingClientRect();
tooltip[0].style.top = (pointBounds.top - tooltipBounds.height - padding) + 'px';
tooltip[0].style.left = ((pointBounds.left + (pointBounds.width / 2)) - (tooltipBounds.width / 2)) + 'px';
}
}
});
see following working snippet...
google.charts.load('current', {
packages: ['corechart']
}).then(function () {
var data = new google.visualization.DataTable({
"cols": [
{"label": "x", "type": "number"},
{"label": "y", "type": "number"}
],
"rows": [
{"c":[{"v": 2015}, {"v": 1}]},
{"c":[{"v": 2016}, {"v": 2}]},
{"c":[{"v": 2017}, {"v": 3}]},
{"c":[{"v": 2018}, {"v": 4}]},
{"c":[{"v": 2019}, {"v": 5}]},
{"c":[{"v": 2020}, {"v": 6}]}
]
});
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
google.visualization.events.addListener(chart, 'onmouseover', function (sender) {
// ensure point is hovered
if (sender.row !== null) {
var padding = 16;
var chartLayout = chart.getChartLayoutInterface();
var pointBounds = chartLayout.getBoundingBox('point#' + (sender.column - 1) + '#' + sender.row);
var tooltip = chart.getContainer().getElementsByClassName('google-visualization-tooltip');
if (tooltip.length > 0) {
var tooltipBounds = tooltip[0].getBoundingClientRect();
tooltip[0].style.top = (pointBounds.top - tooltipBounds.height - padding) + 'px';
tooltip[0].style.left = ((pointBounds.left + (pointBounds.width / 2)) - (tooltipBounds.width / 2)) + 'px';
}
}
});
var options = {
chartArea: {
bottom: 32,
left: 32,
right: 32,
top: 48,
width: '100%',
height: '100%'
},
hAxis: {
format: '0',
ticks: data.getDistinctValues(0)
},
legend: {
position: 'top'
},
pointSize: 4,
tooltip: {
isHtml: true,
trigger: 'both'
}
};
chart.draw(data, options);
});
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Related

Google Chart mouse over skipping data point [duplicate]

I want to add a custom tooltip to my charts by using the default one and for example just append some text to it.
Is this even possible, or to i have to create it all by myself with html?
data= google.visualization.arrayToDataTable([
["Element", "Duration ", { role: "style" }, { role: 'tooltip' }],
["Count", 23515, "orange", ???],
]);
How it is (Default Tooltip):
How i want it:
Append the duration as readable time, but still keep the default tooltip
it's not possible to add content to the default tooltip via standard functionality
to do so requires manipulating the tooltip directly when it is shown
the following working snippet listens for the 'onmouseover' event on the chart
then modifies the tooltip (if found)
using the row # passed as a property of the event argument
keep in mind, the style (font-size) will change according to the size of the chart
the snippet copies the style from the existing lines
google.charts.load('current', {
callback: function () {
var dataTable = new google.visualization.DataTable({
cols: [
{label: 'Element', type: 'string'},
{label: 'Duration', type: 'number'},
{role: 'style', type: 'string'}
],
rows: [
{c:[{v: 'Amazon Elastic Transcoder'}, {v: 3116, f: '3,116 s'}, {v: 'orange'}]},
{c:[{v: 'Amazon Elastic Transcoder'}, {v: 8523, f: '8,523 s'}, {v: 'cyan'}]}
]
});
var options = {
backgroundColor: 'transparent',
legend: 'none',
theme: 'maximized',
hAxis: {
textPosition: 'none'
},
tooltip: {
isHtml: true
}
};
var container = document.getElementById('chart_div');
var chart = new google.visualization.ColumnChart(container);
google.visualization.events.addListener(chart, 'onmouseover', function (props) {
var duration = dataTable.getValue(props.row, 1);
var hours = parseInt( duration / 3600 ) % 24;
var minutes = parseInt( duration / 60 ) % 60;
var seconds = duration % 60;
var tooltip = container.getElementsByTagName('ul');
var tooltipLabel = container.getElementsByTagName('span');
if (tooltip.length > 0) {
// increase tooltip height
tooltip[0].parentNode.style.height = '95px';
// add new li element
var newLine = tooltip[0].appendChild(document.createElement('li'));
newLine.className = 'google-visualization-tooltip-item';
// add span for label
var lineLabel = newLine.appendChild(document.createElement('span'));
lineLabel.style.fontFamily = tooltipLabel[0].style.fontFamily;
lineLabel.style.fontSize = tooltipLabel[0].style.fontSize;
lineLabel.style.color = tooltipLabel[0].style.color;
lineLabel.style.margin = tooltipLabel[0].style.margin;
lineLabel.style.textDecoration = tooltipLabel[0].style.textDecoration;
lineLabel.innerHTML = dataTable.getColumnLabel(1) + ': ';
// add span for value
var lineValue = newLine.appendChild(document.createElement('span'));
lineValue.style.fontFamily = tooltipLabel[0].style.fontFamily;
lineValue.style.fontSize = tooltipLabel[0].style.fontSize;
lineValue.style.fontWeight = tooltipLabel[0].style.fontWeight;
lineValue.style.color = tooltipLabel[0].style.color;
lineValue.style.margin = tooltipLabel[0].style.margin;
lineValue.style.textDecoration = tooltipLabel[0].style.textDecoration;
lineValue.innerHTML = hours + 'h ' + minutes + 'm ' + seconds + 's';
}
});
chart.draw(dataTable, options);
},
packages:['corechart']
});
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>
to add content to the tooltip using standard functionality requires replacing the tooltip altogether
the best result will be using html tooltips
to use html tooltips, two things must be in place
first, need html column property on tooltip column
{role: 'tooltip', type: 'string', p: {html: true}}
next, need tooltip.isHtml: true in the config options
the tooltip can be provided directly in the data,
or add dynamically, as in the following snippet...
google.charts.load('current', {
callback: function () {
var dataTable = new google.visualization.DataTable({
cols: [
{label: 'Element', type: 'string'},
{label: 'Duration', type: 'number'},
{role: 'style', type: 'string'}
],
rows: [
{c:[{v: 'Amazon Elastic Transcoder'}, {v: 3116, f: '3,116 s'}, {v: 'orange'}]},
{c:[{v: 'Amazon Elastic Transcoder'}, {v: 8523, f: '8,523 s'}, {v: 'cyan'}]}
]
});
dataTable.addColumn({role: 'tooltip', type: 'string', p: {html: true}});
for (var i = 0; i < dataTable.getNumberOfRows(); i++) {
var duration = dataTable.getValue(i, 1);
var hours = parseInt( duration / 3600 ) % 24;
var minutes = parseInt( duration / 60 ) % 60;
var seconds = duration % 60;
var tooltip = '<div class="ggl-tooltip"><span>' +
dataTable.getValue(i, 0) + '</span><div>' +
dataTable.getColumnLabel(1) + ': <span>' +
dataTable.getFormattedValue(i, 1) + '</span></div><div>' +
dataTable.getColumnLabel(1) + ': <span>' +
hours + 'h ' + minutes + 'm ' + seconds + 's</span></div></div>';
dataTable.setValue(i, 3, tooltip);
}
var options = {
backgroundColor: 'transparent',
legend: 'none',
theme: 'maximized',
hAxis: {
textPosition: 'none'
},
tooltip: {
//trigger: 'selection',
isHtml: true
}
};
var container = document.getElementById('chart_div');
var chart = new google.visualization.ColumnChart(container);
chart.draw(dataTable, options);
},
packages:['corechart']
});
.ggl-tooltip {
border: 1px solid #E0E0E0;
font-family: Arial, Helvetica;
font-size: 10pt;
padding: 12px 12px 12px 12px;
}
.ggl-tooltip div {
padding-top: 6px;
}
.ggl-tooltip span {
font-weight: bold;
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Chart.js how to display multiple labels on multi bar stacked chart

How can i display different labels under each column and also have another label for the entire group?
As you can see in the picture below i want to use fontawesome icons for each column but another label for the main group. I found other answers how to use fa icons but don't know how to position them under each bar.
The trendlines which connect distinct columns are not so important but would be great if i can find out how to add them also.
Also the chart needs to be scrollable as it can hold lots of data and the labels need to be shown. I found some examples with scroll as well.
Any info is highly appreciated. Or are there any other open source chart frameworks in which i could implement this or something similar to fit my needs?
using google charts...
on the chart's 'ready' event,
you can use chart method --> getChartLayoutInterface()
var chartLayout = chart.getChartLayoutInterface();
the interface has a method --> getBoundingBox()
which will return the position of requested chart element
to get the position of a bar...
var barBounds = chartLayout.getBoundingBox('bar#0#0');
where the first #0 is the series, and the second is the row,
'bar#0#0' would get the first bar on the first row
we can also get the position of the axis label...
var labelBounds = chartLayout.getBoundingBox('hAxis#0#label#0');
we can use a combination of the bar and label bounds to position the icon
we want the left position from the bar, and the top position from the label
see following working snippet,
a column property is used to store the icon name,
the x-axis labels are used for the group
once the icon is in position, the axis label is moved down to make room
google.charts.load('current', {
packages: ['corechart']
}).then(function () {
var data = new google.visualization.DataTable({
cols: [
{label: 'x', type: 'string'},
{label: 'file', type: 'number', p: {icon: 'fa-file'}},
{label: 'database', type: 'number', p: {icon: 'fa-database'}},
{label: 'random', type: 'number', p: {icon: 'fa-random'}},
],
rows: [
{c:[{v: 'Label 1'}, {v: 11}, {v: 6}, {v: 15}]},
{c:[{v: 'Label 2'}, {v: 8}, {v: null}, {v: 12}]},
{c:[{v: 'Label 3'}, {v: 6}, {v: 8}, {v: 18}]},
{c:[{v: 'Label 4'}, {v: null}, {v: 1}, {v: 16}]},
]
});
var options = {
bar: {
groupWidth: '50%',
width: 20
},
colors: ['#ffc107', '#d32f2f', '#00bcd4'],
height: 600,
legend: 'none',
title: 'Capacities',
width: 1000,
};
var container = document.getElementById('chart_div');
var chart = new google.visualization.ColumnChart(container);
google.visualization.events.addListener(chart, 'ready', function () {
// initialize bounds variables
var axisLabels = container.getElementsByTagName('text');
var chartLayout = chart.getChartLayoutInterface();
var chartBounds = chartLayout.getChartAreaBoundingBox();
var containerBounds = container.getBoundingClientRect();
var labelIndex;
// add icons
for (var r = 0; r < data.getNumberOfRows(); r++) {
var barBounds;
var icon;
var iconBounds;
var labelBounds = chartLayout.getBoundingBox('hAxis#0#label#' + r);
for (var c = 1; c < data.getNumberOfColumns(); c++) {
barBounds = chartLayout.getBoundingBox('bar#' + (c - 1) + '#' + r);
if (barBounds !== null) {
icon = container.appendChild(document.createElement('i'));
icon.className = 'fa ' + data.getColumnProperty(c, 'icon');
icon.style.position = 'absolute';
iconBounds = icon.getBoundingClientRect();
icon.style.top = (containerBounds.top + labelBounds.top) + 'px';
icon.style.left = (barBounds.left + containerBounds.left + (barBounds.width / 2) - (iconBounds.width / 2)) + 'px';
}
}
// move axis label down
labelIndex = -1;
Array.prototype.forEach.call(axisLabels, function(label) {
if (label.getAttribute('text-anchor') === 'middle') {
labelIndex++;
if (labelIndex === r) {
label.setAttribute('y', (parseFloat(label.getAttribute('y')) + (iconBounds.height * 2)));
}
}
});
}
});
chart.draw(data, options);
});
i {
color: #00bcd4;
}
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.3.1/css/all.css" integrity="sha384-mzrmE5qonljUremFsqc01SB46JvROS7bZs3IO2EmfFsd15uHvIt+Y8vEf7N7fWAU" crossorigin="anonymous">
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Google charts, Column chart two different colors per column

Let's say I have a datatable like this:
drivingData.addColumn('string', 'VehicleGroup');
drivingData.addColumn('number', 'TimeType');
drivingData.addColumn('number', 'TimeTarget');
drivingData.addColumn('number', 'TimeUsed');
then I add 4 rows like this:
drivingData.addRow(['Trucks-S',0, 1000, 1200])
drivingData.addRow(['Trucks-F',1, 300, 500])
drivingData.addRow(['Trailer-S',0, 1200, 1500])
drivingData.addRow(['Trailer-F',1, 100, 500])
I would like to have a 'stacked' column chart. First one shows Trucks-S with TimeType 0 with yellow and orange colors.
Second would show Trucks-F with TimeType 1 with grey and light-grey colors.
Third would then again be yellow and orange and fourth grey and light-grey and so on...
Is this possible?
Something like this:
https://imgur.com/a/oNOiP
the requested chart is only available as a Material bar chart
Material --> google.charts.Bar -- packages: ['bar']
Classic --> google.visualization.ColumnChart -- packages: ['corechart']
you can break Material bar charts into multiple stacks,
by assigning a group of series to a different y-axis
this is accomplished by using the series option
series: {
2: {
targetAxisIndex: 1
},
3: {
targetAxisIndex: 1
}
},
this will create a second axis on the right side of the chart,
which will have a different scale by default
to keep both y-axis in sync, assign a specific view window
vAxis: {
viewWindow: {
min: 0,
max: 3000
}
}
see following working snippet...
google.charts.load('current', {
packages: ['bar']
}).then(function () {
var drivingData = new google.visualization.DataTable();
drivingData.addColumn('string', 'VehicleGroup');
drivingData.addColumn('number', 'TimeTarget');
drivingData.addColumn('number', 'TimeUsed');
drivingData.addColumn('number', 'TimeTarget');
drivingData.addColumn('number', 'TimeUsed');
drivingData.addRow(['Trucks-S', 1000, 1200, 600, 800])
drivingData.addRow(['Trucks-F', 300, 500, 700, 900])
drivingData.addRow(['Trailer-S', 1200, 1500, 800, 1000])
drivingData.addRow(['Trailer-F', 100, 500, 600, 1000])
var container = document.getElementById('chart_div');
var chart = new google.charts.Bar(container);
var options = google.charts.Bar.convertOptions({
colors: ['#fbc02d', '#616161'],
height: 400,
isStacked: true,
series: {
2: {
targetAxisIndex: 1
},
3: {
targetAxisIndex: 1
}
},
vAxis: {
viewWindow: {
min: 0,
max: 3000
}
}
});
chart.draw(drivingData, options);
});
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>
note: just keep in mind,
there are several configuration options that are not supported by Material charts
see --> Tracking Issue for Material Chart Feature Parity
EDIT
isStacked: 'percent' is currently not support by Material charts
to work around this issue, convert the data manually, before drawing the chart
see following working snippet,
y-axis columns will be converted in groups of two...
google.charts.load('current', {
packages: ['bar']
}).then(function () {
var drivingData = new google.visualization.DataTable();
drivingData.addColumn('string', 'VehicleGroup');
drivingData.addColumn('number', 'TimeTarget');
drivingData.addColumn('number', 'TimeUsed');
drivingData.addColumn('number', 'TimeTarget');
drivingData.addColumn('number', 'TimeUsed');
drivingData.addRow(['Trucks-S', 1000, 1200, 600, 800])
drivingData.addRow(['Trucks-F', 300, 500, 700, 900])
drivingData.addRow(['Trailer-S', 1200, 1500, 800, 1000])
drivingData.addRow(['Trailer-F', 100, 500, 600, 1000])
// convert data to percent
var percentData = new google.visualization.DataTable();
for (var col = 0; col < drivingData.getNumberOfColumns(); col++) {
percentData.addColumn(drivingData.getColumnType(col), drivingData.getColumnLabel(col));
}
for (var row = 0; row < drivingData.getNumberOfRows(); row++) {
var newRow = percentData.addRow();
percentData.setValue(newRow, 0, drivingData.getValue(row, 0));
for (var col = 1; col < drivingData.getNumberOfColumns(); col++) {
if ((col % 2) !== 0) {
var rowTotal = drivingData.getValue(row, col) + drivingData.getValue(row, (col + 1));
percentData.setValue(newRow, col, (drivingData.getValue(row, col) / rowTotal));
percentData.setValue(newRow, (col + 1), (drivingData.getValue(row, (col + 1)) / rowTotal));
}
}
}
var container = document.getElementById('chart_div');
var chart = new google.charts.Bar(container);
var options = google.charts.Bar.convertOptions({
colors: ['#fbc02d', '#616161'],
height: 400,
isStacked: true,
series: {
2: {
targetAxisIndex: 1
},
3: {
targetAxisIndex: 1
}
},
vAxis: {
format: '0%',
viewWindow: {
min: 0,
max: 1
}
}
});
chart.draw(percentData, options);
});
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Google Charts - How to append text to default tooltip

I want to add a custom tooltip to my charts by using the default one and for example just append some text to it.
Is this even possible, or to i have to create it all by myself with html?
data= google.visualization.arrayToDataTable([
["Element", "Duration ", { role: "style" }, { role: 'tooltip' }],
["Count", 23515, "orange", ???],
]);
How it is (Default Tooltip):
How i want it:
Append the duration as readable time, but still keep the default tooltip
it's not possible to add content to the default tooltip via standard functionality
to do so requires manipulating the tooltip directly when it is shown
the following working snippet listens for the 'onmouseover' event on the chart
then modifies the tooltip (if found)
using the row # passed as a property of the event argument
keep in mind, the style (font-size) will change according to the size of the chart
the snippet copies the style from the existing lines
google.charts.load('current', {
callback: function () {
var dataTable = new google.visualization.DataTable({
cols: [
{label: 'Element', type: 'string'},
{label: 'Duration', type: 'number'},
{role: 'style', type: 'string'}
],
rows: [
{c:[{v: 'Amazon Elastic Transcoder'}, {v: 3116, f: '3,116 s'}, {v: 'orange'}]},
{c:[{v: 'Amazon Elastic Transcoder'}, {v: 8523, f: '8,523 s'}, {v: 'cyan'}]}
]
});
var options = {
backgroundColor: 'transparent',
legend: 'none',
theme: 'maximized',
hAxis: {
textPosition: 'none'
},
tooltip: {
isHtml: true
}
};
var container = document.getElementById('chart_div');
var chart = new google.visualization.ColumnChart(container);
google.visualization.events.addListener(chart, 'onmouseover', function (props) {
var duration = dataTable.getValue(props.row, 1);
var hours = parseInt( duration / 3600 ) % 24;
var minutes = parseInt( duration / 60 ) % 60;
var seconds = duration % 60;
var tooltip = container.getElementsByTagName('ul');
var tooltipLabel = container.getElementsByTagName('span');
if (tooltip.length > 0) {
// increase tooltip height
tooltip[0].parentNode.style.height = '95px';
// add new li element
var newLine = tooltip[0].appendChild(document.createElement('li'));
newLine.className = 'google-visualization-tooltip-item';
// add span for label
var lineLabel = newLine.appendChild(document.createElement('span'));
lineLabel.style.fontFamily = tooltipLabel[0].style.fontFamily;
lineLabel.style.fontSize = tooltipLabel[0].style.fontSize;
lineLabel.style.color = tooltipLabel[0].style.color;
lineLabel.style.margin = tooltipLabel[0].style.margin;
lineLabel.style.textDecoration = tooltipLabel[0].style.textDecoration;
lineLabel.innerHTML = dataTable.getColumnLabel(1) + ': ';
// add span for value
var lineValue = newLine.appendChild(document.createElement('span'));
lineValue.style.fontFamily = tooltipLabel[0].style.fontFamily;
lineValue.style.fontSize = tooltipLabel[0].style.fontSize;
lineValue.style.fontWeight = tooltipLabel[0].style.fontWeight;
lineValue.style.color = tooltipLabel[0].style.color;
lineValue.style.margin = tooltipLabel[0].style.margin;
lineValue.style.textDecoration = tooltipLabel[0].style.textDecoration;
lineValue.innerHTML = hours + 'h ' + minutes + 'm ' + seconds + 's';
}
});
chart.draw(dataTable, options);
},
packages:['corechart']
});
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>
to add content to the tooltip using standard functionality requires replacing the tooltip altogether
the best result will be using html tooltips
to use html tooltips, two things must be in place
first, need html column property on tooltip column
{role: 'tooltip', type: 'string', p: {html: true}}
next, need tooltip.isHtml: true in the config options
the tooltip can be provided directly in the data,
or add dynamically, as in the following snippet...
google.charts.load('current', {
callback: function () {
var dataTable = new google.visualization.DataTable({
cols: [
{label: 'Element', type: 'string'},
{label: 'Duration', type: 'number'},
{role: 'style', type: 'string'}
],
rows: [
{c:[{v: 'Amazon Elastic Transcoder'}, {v: 3116, f: '3,116 s'}, {v: 'orange'}]},
{c:[{v: 'Amazon Elastic Transcoder'}, {v: 8523, f: '8,523 s'}, {v: 'cyan'}]}
]
});
dataTable.addColumn({role: 'tooltip', type: 'string', p: {html: true}});
for (var i = 0; i < dataTable.getNumberOfRows(); i++) {
var duration = dataTable.getValue(i, 1);
var hours = parseInt( duration / 3600 ) % 24;
var minutes = parseInt( duration / 60 ) % 60;
var seconds = duration % 60;
var tooltip = '<div class="ggl-tooltip"><span>' +
dataTable.getValue(i, 0) + '</span><div>' +
dataTable.getColumnLabel(1) + ': <span>' +
dataTable.getFormattedValue(i, 1) + '</span></div><div>' +
dataTable.getColumnLabel(1) + ': <span>' +
hours + 'h ' + minutes + 'm ' + seconds + 's</span></div></div>';
dataTable.setValue(i, 3, tooltip);
}
var options = {
backgroundColor: 'transparent',
legend: 'none',
theme: 'maximized',
hAxis: {
textPosition: 'none'
},
tooltip: {
//trigger: 'selection',
isHtml: true
}
};
var container = document.getElementById('chart_div');
var chart = new google.visualization.ColumnChart(container);
chart.draw(dataTable, options);
},
packages:['corechart']
});
.ggl-tooltip {
border: 1px solid #E0E0E0;
font-family: Arial, Helvetica;
font-size: 10pt;
padding: 12px 12px 12px 12px;
}
.ggl-tooltip div {
padding-top: 6px;
}
.ggl-tooltip span {
font-weight: bold;
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

raphael pie chart colors

Is there a way to prefix colours in raphael's pie chart? I need to be able to display for example gold in yellow and platinum in grey. The problem that I have at the moment is that if platinum has a higher value for e.g. 60% and gold 40% the platinum is displayed in yellow.
var r = Raphael("pieChartHolder");
var pie = r.piechart(155, 100, 50, [30, 60, 5, 5], {
colors: ['#FFDE7B', '#CFD0C6', '#E0DED9', '#93948C'],
legend: ['%%gold', '%%silver', '%%palladium', '%%platinum'],
legendpos: 'west'
});
pie.hover(function() {
this.sector.stop();
this.sector.scale(1.1, 1.1, this.cx, this.cy);
if (this.label) {
this.label[0].stop();
this.label[0].attr({
r: 7.5
});
this.label[1].attr({
"font-weight": 800
});
}
}, function() {
this.sector.animate({
transform: 's1 1 ' + this.cx + ' ' + this.cy
}, 500, "bounce");
if (this.label) {
this.label[0].animate({
r: 5
}, 500, "bounce");
this.label[1].attr({
"font-weight": 400
});
}
});
});
Just add matchColors : true
opts.matchColors forces it to match the order of the colors array with the order of the values array. I saw it here:
https://stackoverflow.com/a/14349559
Why do you want to prefix colors? If the library ignores order of items and sorts them itself then you should pass already sorted items.
I included the underscore.js library and sorted your items in descending order.
<script type="text/javascript" src="http://underscorejs.org/underscore-min.js"></script>
<script type="text/javascript" src="raphael-min.js"></script>
<script type="text/javascript" src="g.raphael-min.js"></script>
<script type="text/javascript" src="g.pie-min.js"></script>
<script type="text/javascript">
function drawChart() {
var r = Raphael("pieChartHolder");
var items = [
{ value: 30, color: '#FFDE7B', title: '%%gold' },
{ value: 60, color: '#CFD0C6', title: '%%silver' },
{ value: 5, color: '#E0DED9', title: '%%palladium' },
{ value: 5, color: '#93948C', title: '%%platinum' }
];
items = _.sortBy(items, function(item){ return -item.value; }); // sort by descending
var pie = r.piechart(155, 100, 50, _.pluck(items, "value"), {
colors: _.pluck(items, "color"),
legend: _.pluck(items, "title"),
legendpos: 'west'
});
pie.hover(function() {
this.sector.stop();
this.sector.scale(1.1, 1.1, this.cx, this.cy);
if (this.label) {
this.label[0].stop();
this.label[0].attr({
r: 7.5
});
this.label[1].attr({
"font-weight": 800
});
}
}, function() {
this.sector.animate({
transform: 's1 1 ' + this.cx + ' ' + this.cy
}, 500, "bounce");
if (this.label) {
this.label[0].animate({
r: 5
}, 500, "bounce");
this.label[1].attr({
"font-weight": 400
});
}
});
}
window.onload = drawChart;
</script>
<div id="pieChartHolder"></div>