1
0
mirror of https://github.com/yldio/copilot.git synced 2024-12-05 01:20:08 +02:00
copilot/spikes/graphs-matrix/chartjs-whiskers/client/element.whisker.js

222 lines
5.6 KiB
JavaScript
Raw Normal View History

2016-11-21 13:12:22 +02:00
'use strict';
module.exports = function(Chart) {
var globalOpts = Chart.defaults.global;
globalOpts.elements.rectangle = {
backgroundColor: globalOpts.defaultColor,
borderWidth: 0,
borderColor: globalOpts.defaultColor,
borderSkipped: 'bottom'
};
function isVertical(bar) {
return bar._view.width !== undefined;
}
/**
* Helper function to get the bounds of the bar regardless of the orientation
* @private
* @param bar {Chart.Element.Rectangle} the bar
* @return {Bounds} bounds of the bar
*/
function getBarBounds(bar) {
var vm = bar._view;
var x1, x2, y1, y2;
if (isVertical(bar)) {
// vertical
var halfWidth = vm.width / 2;
x1 = vm.x - halfWidth;
x2 = vm.x + halfWidth;
y1 = Math.min(vm.y, vm.base);
y2 = Math.max(vm.y, vm.base);
} else {
// horizontal bar
var halfHeight = vm.height / 2;
x1 = Math.min(vm.x, vm.base);
x2 = Math.max(vm.x, vm.base);
y1 = vm.y - halfHeight;
y2 = vm.y + halfHeight;
}
return {
left: x1,
top: y1,
right: x2,
bottom: y2
};
}
Chart.elements.Whisker = Chart.Element.extend({
draw: function() {
var ctx = this._chart.ctx;
var vm = this._view;
var halfWidth = vm.width / 2,
leftX = vm.x - halfWidth,
rightX = vm.x + halfWidth,
top = vm.base - (vm.base - vm.y),
halfStroke = vm.borderWidth / 2;
// Canvas doesn't allow us to stroke inside the width so we can
// adjust the sizes to fit if we're setting a stroke on the line
if (vm.borderWidth) {
leftX += halfStroke;
rightX -= halfStroke;
top += halfStroke;
}
ctx.beginPath();
ctx.fillStyle = vm.backgroundColor;
ctx.strokeStyle = vm.borderColor;
ctx.lineWidth = vm.borderWidth;
// Corner points, from bottom-left to bottom-right clockwise
// | 1 2 |
// | 0 3 |
var corners = [
[leftX, vm.base],
[leftX, top],
[rightX, top],
[rightX, vm.base]
];
// Find first (starting) corner with fallback to 'bottom'
var borders = ['bottom', 'left', 'top', 'right'];
var startCorner = borders.indexOf(vm.borderSkipped, 0);
if (startCorner === -1) {
startCorner = 0;
}
function cornerAt(index) {
return corners[(startCorner + index) % 4];
}
// Draw rectangle from 'startCorner'
var corner = cornerAt(0);
ctx.moveTo(corner[0], corner[1]);
for (var i = 1; i < 4; i++) {
corner = cornerAt(i);
ctx.lineTo(corner[0], corner[1]);
}
ctx.fill();
if (vm.borderWidth) {
ctx.stroke();
}
ctx.closePath();
// Median line
ctx.beginPath();
ctx.moveTo(leftX, vm.median);
ctx.lineTo(rightX, vm.median);
ctx.lineWidth = 2;
// set line color
ctx.strokeStyle = 'rgb(54, 74, 205)';
ctx.stroke();
ctx.closePath();
// Top Whisker
// if (smaller than 5px then do not draw)
if (vm.median - vm.maxV > 10) {
ctx.beginPath();
ctx.moveTo((rightX - leftX) / 2 + leftX, vm.median - 1);
ctx.lineTo((rightX - leftX) / 2 + leftX, vm.maxV);
ctx.lineWidth = 2;
ctx.strokeStyle = 'rgb(245, 93, 93)';
ctx.stroke();
ctx.closePath();
ctx.beginPath();
ctx.arc((rightX - leftX) / 2 + leftX, vm.maxV, 3, 0, 2 * Math.PI);
ctx.fillStyle = 'rgb(245, 93, 93)';
ctx.fill();
}
// Bottom Whisker
// if (smaller than 5px then do not draw)
if (vm.minV - vm.median > 10) {
ctx.beginPath();
ctx.moveTo((rightX - leftX) / 2 + leftX, vm.median + 1);
ctx.lineTo((rightX - leftX) / 2 + leftX, vm.minV);
ctx.lineWidth = 2;
ctx.strokeStyle = 'rgb(245, 93, 93)';
ctx.stroke();
ctx.closePath();
ctx.beginPath();
ctx.arc((rightX - leftX) / 2 + leftX, vm.minV, 3, 0, 2 * Math.PI);
ctx.fillStyle = 'rgb(245, 93, 93)';
ctx.fill();
}
},
height: function() {
var vm = this._view;
return vm.base - vm.y;
},
inRange: function(mouseX, mouseY) {
var inRange = false;
if (this._view) {
var bounds = getBarBounds(this);
inRange = mouseX >= bounds.left && mouseX <= bounds.right && mouseY >= bounds.top && mouseY <= bounds.bottom;
}
return inRange;
},
inLabelRange: function(mouseX, mouseY) {
var me = this;
if (!me._view) {
return false;
}
var inRange = false;
var bounds = getBarBounds(me);
if (isVertical(me)) {
inRange = mouseX >= bounds.left && mouseX <= bounds.right;
} else {
inRange = mouseY >= bounds.top && mouseY <= bounds.bottom;
}
return inRange;
},
inXRange: function(mouseX) {
var bounds = getBarBounds(this);
return mouseX >= bounds.left && mouseX <= bounds.right;
},
inYRange: function(mouseY) {
var bounds = getBarBounds(this);
return mouseY >= bounds.top && mouseY <= bounds.bottom;
},
getCenterPoint: function() {
var vm = this._view;
var x, y;
if (isVertical(this)) {
x = vm.x;
y = (vm.y + vm.base) / 2;
} else {
x = (vm.x + vm.base) / 2;
y = vm.y;
}
return {x: x, y: y};
},
getArea: function() {
var vm = this._view;
return vm.width * Math.abs(vm.y - vm.base);
},
tooltipPosition: function() {
var vm = this._view;
return {
x: vm.x,
y: vm.y
};
}
});
};