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'use strict';
var defaults = require('../core/core.defaults');
var Element = require('../core/core.element');
var helpers = require('../helpers/index');
var valueOrDefault = helpers.valueOrDefault;
var defaultColor = defaults.global.defaultColor;
defaults._set('global', {
elements: {
point: {
radius: 3,
pointStyle: 'circle',
backgroundColor: defaultColor,
borderColor: defaultColor,
borderWidth: 1,
// Hover
hitRadius: 1,
hoverRadius: 4,
hoverBorderWidth: 1
}
}
});
function xRange(mouseX) {
var vm = this._view;
return vm ? (Math.abs(mouseX - vm.x) < vm.radius + vm.hitRadius) : false;
}
function yRange(mouseY) {
var vm = this._view;
return vm ? (Math.abs(mouseY - vm.y) < vm.radius + vm.hitRadius) : false;
}
module.exports = Element.extend({
_type: 'point',
inRange: function(mouseX, mouseY) {
var vm = this._view;
return vm ? ((Math.pow(mouseX - vm.x, 2) + Math.pow(mouseY - vm.y, 2)) < Math.pow(vm.hitRadius + vm.radius, 2)) : false;
},
inLabelRange: xRange,
inXRange: xRange,
inYRange: yRange,
getCenterPoint: function() {
var vm = this._view;
return {
x: vm.x,
y: vm.y
};
},
getArea: function() {
return Math.PI * Math.pow(this._view.radius, 2);
},
tooltipPosition: function() {
var vm = this._view;
return {
x: vm.x,
y: vm.y,
padding: vm.radius + vm.borderWidth
};
},
draw: function(chartArea) {
var vm = this._view;
var ctx = this._chart.ctx;
var pointStyle = vm.pointStyle;
var rotation = vm.rotation;
var radius = vm.radius;
var x = vm.x;
var y = vm.y;
var globalDefaults = defaults.global;
var defaultColor = globalDefaults.defaultColor; // eslint-disable-line no-shadow
if (vm.skip) {
return;
}
// Clipping for Points.
if (chartArea === undefined || helpers.canvas._isPointInArea(vm, chartArea)) {
ctx.strokeStyle = vm.borderColor || defaultColor;
ctx.lineWidth = valueOrDefault(vm.borderWidth, globalDefaults.elements.point.borderWidth);
ctx.fillStyle = vm.backgroundColor || defaultColor;
helpers.canvas.drawPoint(ctx, pointStyle, radius, x, y, rotation);
}
}
});
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