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Use getTextColor for retention heatmap cells so text is visible on dark backgrounds #62

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Use getTextColor for retention heatmap cells so text is visible on dark backgrounds #62

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f294e12
use getTextColor
rgrunberg Oct 25, 2021
68d8582
minify
rgrunberg Oct 25, 2021
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87 changes: 31 additions & 56 deletions alamode.js
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,32 @@ var alamode = {
return "." + id;
},

getTextColor: function(hex) {
function hexToRgb(hex) {
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),
b: parseInt(result[3], 16)
} : null;
}

var isHex = /(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)/i.test(hex);

if (isHex) {
rgb = hexToRgb(hex);
o = Math.round(((parseInt(rgb.r) * 299) + (parseInt(rgb.g) * 587) + (parseInt(rgb.b) * 114)) /1000);
} else {
o = 255;
}

if (o > 125) {
return "#2B2B2B";
} else {
return "#FCFCFC";
}
},

addLinksToTables: function(o) {
var tableId = "#" + o["table_id"],
linkColumns = o["link_columns"],
Expand Down Expand Up @@ -524,6 +550,7 @@ var alamode = {
.data(function(d) { return makeRow(data,d); })
.enter().append("td")
.style("background",function(d) { if (checkShade(d)) { return pickColor(d); } })
.style("color",function(d) { if (checkShade(d)) { return alamode.getTextColor(pickColor(d)); } })
.attr("class",function(d) { return cellClass(d); })
.text(function(d) { return fmt(d,o); })

Expand Down Expand Up @@ -2844,7 +2871,7 @@ var alamode = {
data.forEach(function(d,i) {
var selector = tableId + " table [data-axel-rowkey='" + i + "'][data-axel-column='" + idx + "']",
selectedColor = scale(d[column]),
textColor = getTextColor(selectedColor),
textColor = alamode.getTextColor(selectedColor),
cell = $(selector);

if (colorText) { cell.css("color",selectedColor); } else { cell.css( {"background":selectedColor,"color":textColor} ); }
Expand All @@ -2854,7 +2881,7 @@ var alamode = {
function drawThreshold(column, type, threshold, color, colorText) {

var idx = colIndex[column];
var textColor = getTextColor(color);
var textColor = alamode.getTextColor(color);

data.forEach(function(d,i) {
var selector = tableId + " table [data-axel-rowkey='" + i + "'][data-axel-column='" + idx + "']",
Expand All @@ -2869,32 +2896,6 @@ var alamode = {
}
})
}

function hexToRgb(hex) {
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),
b: parseInt(result[3], 16)
} : null;
}

function getTextColor(hex) {
var isHex = /(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)/i.test(hex);

if (isHex) {
rgb = hexToRgb(hex);
o = Math.round(((parseInt(rgb.r) * 299) + (parseInt(rgb.g) * 587) + (parseInt(rgb.b) * 114)) /1000);
} else {
o = 255;
}

if (o > 125) {
return "#2B2B2B";
} else {
return "#FCFCFC";
}
}
},

customizeTable: function (o) {
Expand Down Expand Up @@ -2972,7 +2973,7 @@ var alamode = {

var selector = tableId + " table [data-axel-rowkey='" + i + "'][data-axel-column='" + idx + "']",
selectedColor = scale(d[c]),
textColor = getTextColor(selectedColor),
textColor = alamode.getTextColor(selectedColor),
cell = $(selector);

if (colorText) { cell.css("color",selectedColor); } else { cell.css( {"background":selectedColor,"color":textColor} ); }
Expand All @@ -2982,7 +2983,7 @@ var alamode = {

function drawThreshold(type, threshold, color, colorText) {

var textColor = getTextColor(color);
var textColor = alamode.getTextColor(color);

data.forEach(function(d,i) {
includedColumns.forEach(function(c) {
Expand All @@ -3003,32 +3004,6 @@ var alamode = {
})
})
}

function hexToRgb(hex) {
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),
b: parseInt(result[3], 16)
} : null;
}

function getTextColor(hex) {
var isHex = /(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)/i.test(hex);

if (isHex) {
rgb = hexToRgb(hex);
o = Math.round(((parseInt(rgb.r) * 299) + (parseInt(rgb.g) * 587) + (parseInt(rgb.b) * 114)) /1000);
} else {
o = 255;
}

if (o > 125) {
return "#2B2B2B";
} else {
return "#FCFCFC";
}
}
},

addTableOfContents: function(o){
Expand Down
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