I have a Highcharts instance that is rendered within a scrollable container. The tooltip.outside option is also set to true so that the tooltip is always on top regardless if it fits the chart svg.
When you scroll however, you can see tooltip following the scrolling. Moreover, when you hover over the series, the tooltip renders in various positions.
Is there a way to fix it? FYI if you set tooltip.outside to false everything works just fine. I'm sure the issue revolves around the fact that when set to true, the calculation to determine where to render the tooltip is no longer correct as the position changed with the scrolling.
So to sum up the 2 issues that appear:
The tooltip follows the scrolling
On re-hovering, the position on the tooltip on the series is wrong.
See gif around the issue: https://imgur.com/a/Zj3NstL
See example: https://jsfiddle.net/tcqeo415/2/
If you comment out my CSS code in the example, you should be able to see how it should work
This answer is pretty similar to #ppotaczek one in terms of the idea just a different implementation.
When the mouse enters a chart, the chart position is cached so if you scroll but your mouse is still within the chart, it doesn't recalculate the position but due to the scrolling the position has changed.
A solution would be to use tooltip.positioner and disable the caching by nullifying the chartsPosition.
positioner: function (w, h, point) {
this.chart.pointer.chartPosition = null;
return this.getPosition(w, h, point);
},
This will force the chart to recalculate the charts position. Note that this might be DOM expensive.
Then, if you want to maintain the scrolling behaviour checkout #ppotaczeck's answer. The code below will remove any tooltips on scroll (works only for the first example)
document.body.addEventListener("scroll", function() {
Highcharts.charts[0].tooltip.hide(0);
}, true)
Example: https://jsfiddle.net/gv1m6tjy/
A chart does not recalculate it's position because it does not track the scroll event.
To fix this, you can recalculate chart.pointer.chartPosition.top. Below code works only for the first chart:
(function (H) {
H.wrap(H.Tooltip.prototype, 'refresh', function (proceed, points) {
proceed.apply(this, Array.prototype.slice.call(arguments, 1));
this.points = points;
});
}(Highcharts));
document.getElementById('container1').addEventListener('mouseenter', function(){
var chart = Highcharts.charts[0];
if (chart && chart.pointer && !chart.startChartPosY) {
chart.pointer.getChartPosition();
chart.startChartPosY = chart.pointer.chartPosition.top;
}
});
document.getElementById('outer').addEventListener('scroll', function(e){
var H = Highcharts,
chart = H.charts[H.hoverChartIndex],
tooltip = chart.tooltip;
if (chart && chart.pointer) {
chart.pointer.chartPosition.top = chart.startChartPosY - this.scrollTop;
}
if (tooltip && !tooltip.isHidden) {
tooltip.refresh(tooltip.points);
}
});
Live demo: https://jsfiddle.net/BlackLabel/ao0c21g6/3/
Docs: https://www.highcharts.com/docs/extending-highcharts/extending-highcharts
Related
I'm trying to implement synchronised charts in my application using the example code from Highcharts here:
https://www.highcharts.com/demo/synchronized-charts
I have a column layout using the Materialize framework and the charts are positioned side by side in a row. After doing some playing around with the Highcharts example, it seems the charts don't behave the same horizontally as they do vertically. The labels are not synced across the charts and the crosshairs don't move in sync either.
After doing some reading I've found a similar question has been asked before:
Highcharts Sync charts horizontally
However, as someone pointed out in the comments on the "marked correct" answer, the solution doesn't work for responsive charts like mine. This person was advised to ask a separate SO question, but as I can't find it, I'm asking it.
So far this is the closest I can get to my charts properly working:
https://jsfiddle.net/6h7aL2rw/1/
However, as you can see as you move the cursor to the end of the first chart, the tooltip and crosshairs are not fully synchronised and are behind by a few points on each chart.
The code I've changed from the original example is the following:
$('#container').bind('mousemove touchmove touchstart', function (e) {
var chart,
point,
i,
event;
for (i = 0; i < Highcharts.charts.length; i = i + 1) {
chart = Highcharts.charts[i];
event = chart.pointer.normalize(e.originalEvent); // Find coordinates within the chart
event.chartX = (event.chartX + 3 * $('.chart').width()) % $('.chart').width();
point = chart.series[0].searchPoint(event, true); // Get the hovered point
if (point) {
point.highlight(e);
}
}
});
As was pointed out in the original question though, I don't understand the significance of this:
event.chartX + 3 * $('.chart').width()
But I feel that it's this bit of code that is the problem preventing the charts from being in sync.
That problem is caused by the gaps between the charts, please check an example without them: https://jsfiddle.net/BlackLabel/5Lgrc08z/
As a solution you can set event.chartX to e.offsetX:
$('#container').bind('mousemove touchmove touchstart', function(e) {
var chart,
point,
i,
event;
for (i = 0; i < Highcharts.charts.length; i = i + 1) {
chart = Highcharts.charts[i];
event = chart.pointer.normalize(e.originalEvent); // Find coordinates within the chart
event.chartX = e.offsetX;
point = chart.series[0].searchPoint(event, true); // Get the hovered point
if (point) {
point.highlight(e);
}
}
});
Live demo: https://jsfiddle.net/BlackLabel/ts7w4kxu/
I'm using the syncExtremes function to synchronise multiple charts (and their zooms) as implemented in the example below:
https://jsfiddle.net/pz2bak0u
However I've come across two issues I can't seem to find my way around. The first one is that if you zoom multiple times in different charts without reseting and then click on one of the Reset zoom buttons, the other Reset zoom buttons hang around (and I would like them to disappear as they don't have any functionality when clicked).
I then modified the fiddle to allow xy zooming:
https://jsfiddle.net/47dz68Lt
If you zoom in on the first chart, then the second, and then the third, and try unzooming the first chart, the other two stay halfway zoomed.
I've tried
chart.xAxis[0].setExtremes(null, null);
but haven't had any luck.
Is it even posible to reset all xy zooming in all charts at the same time as in the x zooming example?
Currently you reset only x-axes extremes, with xy zoom type, you need to also reset y-axes extremes:
var H = Highcharts;
H.wrap(H.Chart.prototype, 'zoomOut', function(proceed) {
proceed.apply(this, Array.prototype.slice.call(arguments, 1));
H.charts.forEach(function(chart) {
if (chart !== this) {
chart.yAxis[0].setExtremes(null, null, undefined, false);
}
}, this);
});
To control the display of the resetZoomButton, you can wrap showResetZoom method, for example:
H.wrap(H.Chart.prototype, 'showResetZoom', function(proceed) {
var visibleBtn = false;
H.charts.forEach(function(chart) {
if (chart.resetZoomButton) {
visibleBtn = true;
}
});
if (!visibleBtn) {
proceed.apply(this, Array.prototype.slice.call(arguments, 1));
}
});
Live demo: https://jsfiddle.net/BlackLabel/bg7L1nev/
Docs: https://www.highcharts.com/docs/extending-highcharts/extending-highcharts
I made a small fiddle based on the highcharts demos at http://jsfiddle.net/w53woene/1/
The issue I have boils down to four things:
1) I need to rotate the labels (this is based on a feature request so I can't ignore it).
labels: {
rotation: -45
}
2) The fact that the last label is really really long. This is based on data which is given for each chart so it's not always the case but it's the case around 30%-40% of the time so quite often.
3) Labels shouldn't be wrapped or shortened with an ellipsis.
4) I need to add spacing between the chart and the legend to adapt to the labels size but only when the label is going to be too long and colliding with the legend.
This only seems to happen when the chart: { inverted: true } and if it's not inverted the legend behaves normally, increasing the distance from the chart as needed.
Ideally I'd like to know if there's a specific option I'm missing that achieves this natively, i.e., I would have expected floating: false to achieve this the same way it does when the chart is not inverted, but it doesn't seem to. If this isn't possible I'd like to know how I can adjust the chart size (excluding the legend) in order to achieve this via JavaScript.
The problem is that vertical axis add space on the left size, but doesn't add on the bottom. I would wrap labels for a better readability: http://jsfiddle.net/w53woene/2/ - otherwise it may happen that you will have so long label that chart will get 0 pixels for plotting area.
If you really need non-wrapped text, then I would wrap Axis.prototype. getOffset to add extra space:
(function(H) {
H.wrap(H.Axis.prototype, 'getOffset', function(p) {
p.call(this);
if (this.isXAxis) {
var lastTick = this.tickPositions[this.tickPositions.length - 1],
lastLabel = this.ticks[lastTick].label,
height = lastLabel.getBBox(true).height;
this.labelDiff = height - this.chart.marginBottom;
if (this.labelDiff > this.chart.axisOffset[2]) {
this.chart.axisOffset[2] = this.labelDiff;
} else {
this.labelDiff = 0;
}
} else {
this.offset -= this.chart.xAxis[0].labelDiff;
}
});
})(Highcharts)
And live demo: http://jsfiddle.net/vwegeuvy/
There are plenty examples of hiding an Y-Axis without hiding the series - But i need the opposite of that.
I want to make a series invisible while still displaying the y-axis and i dont know how!
Why?
Because i have 2 diagrams which are perfectly aligned by their x-Axis:
But when i disable both Temperature fields, the axis will be lost, and the diagrams are incorrect in size:
I also don't like the idea, of disabling all and loosing whole diagram style:
There is no problem by having an empty diagram, but having a blank box isn't the style i want to reach.
I tried to manipulate the axis in within the legendItemClick event, but selecting the correct axis and set their value visible didn't work out. How can I solve this problem?
I think you have two options:
play around with margins - to make them fixed
set min and max for axis, so labels will remain on a chart: example
if you don't know min/max values at start you can change them within the legendItemClick as following:
plotOptions: {
series: {
events: {
legendItemClick: function() {
var temperatur = this.chart.series[0];
var taupunkt = this.chart.series[1];
var other = this.name=="Lufttemperatur"?taupunkt:temperatur;
var element = this;
if(this.name == "Lufttemperatur" || this.name == "Taupunkt") {
if(this.visible && !other.visible) {
//both will be invisible soon
this.chart.yAxis[0].update({
min:element.yAxis.min,
max:element.yAxis.max
});
} else {
//one will be visible
this.chart.yAxis[0].update({
min:null,
max:null
});
}
}
}
}
},
}
This will only set min/max if there is no one of your series visible, but deletes it if you have one visible
I am trying to reposition data labels in HighCharts line charts so that they don't overlap.
You can do this initially by attaching a repositioning function to the load event:
var repositionLabels = function(series) {
var s1 = series[0].data;
var s2 = series[1].data;
var i=0, l=s1.length, higher;
for(; i<l; i++) {
higher = s1[i].y > s2[i].y;
s1[i].dataLabel.attr('y', higher ? s1[i].dataLabel.y-10 : s1[i].dataLabel.y+30 );
s2[i].dataLabel.attr('y', !higher ? s2[i].dataLabel.y-10 : s2[i].dataLabel.y+30 );
}
}
For the upper line, data labels are positioned above the line; for the lower line, the data labels are positioned below. So they don't overlap.
The problem
The problem is that if you click on a legend item to show/hide a line, the data labels revert to their default (bad, overlapping) positions. Here's a demo: http://jsfiddle.net/supertrue/QbGPV/984/
I would expect that attaching the same function to the redraw event would keep new label positions intact, but it doesn't. Nor does attaching it to plotOptions.line.events.legendItemClick.
How can I keep the good label positions intact after legend items are clicked?
I don't know if this is the best solution. I delayed the positioning and then it kinda worked.
See fiddle
setTimeout(function () {
positionLabels(chart.series);
}, 500);
Edit
Updated Fiddle
It appears that the series animation is interfering with the label positioning. If you set:
chart: { renderTo: 'container', type: 'line', animation:false,
then it all works fine. I'm guessing that the animation is running after you have positioned the labels, and is re-positioning them for you.
It looks like you'll either have to turn off animation, or use the setTimeout method posted by #anpsmn.