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draggable-points.js
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/**
* Draggable points plugin
* Author: Torstein Honsi
* License: MIT License
*
*/
(function (Highcharts) {
var addEvent = Highcharts.addEvent,
each = Highcharts.each,
pick = Highcharts.pick;
/**
* Filter by dragMin and dragMax
*/
function filterRange(newY, series, XOrY) {
var options = series.options,
dragMin = pick(options['dragMin' + XOrY], undefined),
dragMax = pick(options['dragMax' + XOrY], undefined);
if (newY < dragMin) {
newY = dragMin;
} else if (newY > dragMax) {
newY = dragMax;
}
return newY;
}
Highcharts.Chart.prototype.callbacks.push(function (chart) {
var container = chart.container,
dragPoint,
dragX,
dragY,
dragPlotX,
dragPlotY;
function mouseDown(e) {
var hoverPoint = chart.hoverPoint,
options,
originalEvent = e.originalEvent || e;
if (hoverPoint) {
options = hoverPoint.series.options;
if (options.draggableX) {
dragPoint = hoverPoint;
dragX = originalEvent.changedTouches ? originalEvent.changedTouches[0].pageX : e.pageX;
dragPlotX = dragPoint.plotX;
}
if (options.draggableY) {
dragPoint = hoverPoint;
dragY = originalEvent.changedTouches ? originalEvent.changedTouches[0].pageY : e.pageY;
dragPlotY = dragPoint.plotY + (chart.plotHeight - (dragPoint.yBottom || chart.plotHeight));
}
// Disable zooming when dragging
if (dragPoint) {
chart.mouseIsDown = false;
}
}
}
function mouseMove(e) {
e.preventDefault();
if (dragPoint) {
var originalEvent = e.originalEvent || e,
pageX = originalEvent.changedTouches ? originalEvent.changedTouches[0].pageX : e.pageX,
pageY = originalEvent.changedTouches ? originalEvent.changedTouches[0].pageY : e.pageY,
deltaY = dragY - pageY,
deltaX = dragX - pageX,
draggableX = dragPoint.series.options.draggableX,
draggableY = dragPoint.series.options.draggableY,
series = dragPoint.series,
isScatter = series.type === 'bubble' || series.type === 'scatter',
newPlotX = isScatter ? dragPlotX - deltaX : dragPlotX - deltaX - dragPoint.series.xAxis.minPixelPadding,
newPlotY = chart.plotHeight - dragPlotY + deltaY,
newX = dragX === undefined ? dragPoint.x : dragPoint.series.xAxis.translate(newPlotX, true),
newY = dragY === undefined ? dragPoint.y : dragPoint.series.yAxis.translate(newPlotY, true),
proceed;
newX = filterRange(newX, series, 'X');
newY = filterRange(newY, series, 'Y');
// Fire the 'drag' event with a default action to move the point.
dragPoint.firePointEvent(
'drag', {
newX: draggableX ? newX : dragPoint.x,
newY: draggableY ? newY : dragPoint.y
}, function () {
proceed = true;
dragPoint.update({
x: draggableX ? newX : dragPoint.x,
y: draggableY ? newY : dragPoint.y
}, false);
// Hide halo while dragging (#14)
if (series.halo) {
series.halo = series.halo.destroy();
}
if (chart.tooltip) {
chart.tooltip.refresh(chart.tooltip.shared ? [dragPoint] : dragPoint);
}
if (series.stackKey) {
chart.redraw();
} else {
series.redraw();
}
}
);
// The default handler has not run because of prevented default
if (!proceed) {
drop();
}
}
}
function drop(e) {
if (dragPoint) {
if (e) {
var originalEvent = e.originalEvent || e,
pageX = originalEvent.changedTouches ? originalEvent.changedTouches[0].pageX : e.pageX,
pageY = originalEvent.changedTouches ? originalEvent.changedTouches[0].pageY : e.pageY,
draggableX = dragPoint.series.options.draggableX,
draggableY = dragPoint.series.options.draggableY,
deltaX = dragX - pageX,
deltaY = dragY - pageY,
series = dragPoint.series,
isScatter = series.type === 'bubble' || series.type === 'scatter',
newPlotX = isScatter ? dragPlotX - deltaX : dragPlotX - deltaX - dragPoint.series.xAxis.minPixelPadding,
newPlotY = chart.plotHeight - dragPlotY + deltaY,
newX = dragX === undefined ? dragPoint.x : dragPoint.series.xAxis.translate(newPlotX, true),
newY = dragY === undefined ? dragPoint.y : dragPoint.series.yAxis.translate(newPlotY, true);
newX = filterRange(newX, series, 'X');
newY = filterRange(newY, series, 'Y');
dragPoint.update({
x: draggableX ? newX : dragPoint.x,
y: draggableY ? newY : dragPoint.y
});
}
dragPoint.firePointEvent('drop');
}
dragPoint = dragX = dragY = undefined;
}
// Kill animation (why was this again?)
chart.redraw();
// Add'em
addEvent(container, 'mousemove', mouseMove);
addEvent(container, 'touchmove', mouseMove);
addEvent(container, 'mousedown', mouseDown);
addEvent(container, 'touchstart', mouseDown);
addEvent(document, 'mouseup', drop);
addEvent(document, 'touchend', drop);
addEvent(container, 'mouseleave', drop);
});
/**
* Extend the column chart tracker by visualizing the tracker object for small points
*/
Highcharts.wrap(Highcharts.seriesTypes.column.prototype, 'drawTracker', function (proceed) {
var series = this,
options = series.options;
proceed.apply(series);
if (options.draggableX || options.draggableY) {
each(series.points, function (point) {
point.graphic.attr(point.shapeArgs.height < 3 ? {
'stroke': 'black',
'stroke-width': 2,
'dashstyle': 'shortdot'
} : {
'stroke-width': series.options.borderWidth,
'dashstyle': series.options.dashStyle || 'solid'
});
});
}
});
})(Highcharts);