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Update chartjs-plugin-labels.js #129

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ed77df9
Update chartjs-plugin-labels.js
jcroucher Aug 3, 2020
2a9a15e
Update chartjs-plugin-labels.js
jcroucher Aug 3, 2020
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41 changes: 32 additions & 9 deletions src/chartjs-plugin-labels.js
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Original file line number Diff line number Diff line change
Expand Up @@ -35,10 +35,12 @@
}

var SUPPORTED_TYPES = {};
['pie', 'doughnut', 'polarArea', 'bar'].forEach(function (t) {
['pie', 'doughnut', 'polarArea', 'bar', 'horizontalBar'].forEach(function (t) {
SUPPORTED_TYPES[t] = true;
});

var spacedItems = 1;

function Label() {
this.renderToDataset = this.renderToDataset.bind(this);
}
Expand All @@ -65,7 +67,7 @@
textMargin: 2,
overlap: true
}, options);
if (chart.config.type === 'bar') {
if (chart.config.type === 'bar' || chart.config.type === 'horizontalBar') {
this.options.position = 'default';
this.options.arc = false;
this.options.overlap = true;
Expand Down Expand Up @@ -105,15 +107,17 @@
}
ctx.beginPath();
ctx.fillStyle = this.getFontColor(dataset, element, index);
this.renderLabel(label, renderInfo);

const percentage = this.getPercentage(dataset, element, index);
this.renderLabel(label, renderInfo, percentage, index);
ctx.restore();
};

Label.prototype.renderLabel = function (label, renderInfo) {
return this.options.arc ? this.renderArcLabel(label, renderInfo) : this.renderBaseLabel(label, renderInfo);
Label.prototype.renderLabel = function (label, renderInfo, percentage, index) {
return this.options.arc ? this.renderArcLabel(label, renderInfo) : this.renderBaseLabel(label, renderInfo, percentage, index);
};

Label.prototype.renderBaseLabel = function (label, position) {
Label.prototype.renderBaseLabel = function (label, position, percentage, index) {
var ctx = this.ctx;
if (typeof label === 'object') {
ctx.drawImage(label, position.x - label.width / 2, position.y - label.height / 2, label.width, label.height);
Expand All @@ -132,7 +136,26 @@
var lines = label.split('\n');
for (var i = 0; i < lines.length; i++) {
var y = position.y - this.options.fontSize / 2 * lines.length + this.options.fontSize * i;
ctx.fillText(lines[i], position.x, y);
if(this.chart.config.type === 'horizontalBar') {
var specPos = (position.x + (ctx.measureText(lines[i]).width / 2)) + this.options.textMargin;
if (localStorage.getItem('vm-base') && parseInt(localStorage.getItem('vm-base'), 10) + (ctx.measureText(lines[i]).width / 2) + this.options.textMargin > specPos) {
specPos = parseInt(localStorage.getItem('vm-base'), 10) + (ctx.measureText(lines[i]).width / 2) + this.options.textMargin;
}
ctx.fillText(lines[i], specPos, y);
} else if (this.chart.config.type === 'bar' && this.options.stacked){
if (lines[i] > 0) {
ctx.fillText(lines[i], position.x, (y + this.options.fontSize + 4));
} else {
ctx.fillText(Math.abs(lines[i]), position.x, y);
}
} else {
var newY = y;

if(percentage < 5) {
newY = y - 400;
}
ctx.fillText(lines[i], position.x, newY);
}
}
ctx.restore();
}
Expand Down Expand Up @@ -276,7 +299,7 @@
percentage = parseFloat(percentage.toFixed(this.options.precision));
}
if (this.chart.config.type === 'bar') {
this.barTotalPercentage[index] = this.totalPercentage
this.barTotalPercentage[index] = this.totalPercentage;
}
}
this.percentage = percentage;
Expand Down Expand Up @@ -337,7 +360,7 @@
endAngle: endAngle,
totalAngle: totalAngle,
view: view
}
};
};

Label.prototype.getBarRenderInfo = function (element, label) {
Expand Down