Potential Bug: pointSize property of scatter chart lost on zoom

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Matthew Depew

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Aug 29, 2017, 2:44:18 PM8/29/17
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I think I've found a bug in the zoom feature of the scatter chart.  I've got the following options set:

var options = {
                       height:300,
                       pointSize:1,
                        hAxis:{minValue:new Date(start_dt),maxValue:new Date(end_dt)},
                    explorer:{axis:'horizontal',maxZoomIn:1000,actions:['dragToZoom','rightClickToReset']}};
var chart = new google.visualization.ScatterChart(document.getElementById('chart_div'+index));
chart.draw(data, options);

Whenever I zoom in on the chart, it resets the pointSize to the default (~10 I think). I think the expected behavior should be to maintain pointsize on the re-draw.

Is this a bug, or am I doing something wrong?

Thanks!

Daniel LaLiberte

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Aug 29, 2017, 2:51:10 PM8/29/17
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Hi Matthew,

This sounds like a variation on the problem where redrawing the chart disables the explorer mode entirely.  But perhaps this is different since you are getting a different point size than expected.  

I just released v46 (as 'upcoming') which includes a fix of the explorer mode.  Please try it out with your example and let me know.

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Matthew Depew

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Aug 29, 2017, 2:57:08 PM8/29/17
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I changed my load line from
google.charts.load('current', {'packages':['corechart']});
to
google.charts.load('upcoming', {'packages':['corechart']});
and I'm still seeing the issue. Is that change all that is needed to switch to the upcoming version?

On Tuesday, August 29, 2017 at 1:51:10 PM UTC-5, Daniel LaLiberte wrote:
Hi Matthew,

This sounds like a variation on the problem where redrawing the chart disables the explorer mode entirely.  But perhaps this is different since you are getting a different point size than expected.  

I just released v46 (as 'upcoming') which includes a fix of the explorer mode.  Please try it out with your example and let me know.
On Tue, Aug 29, 2017 at 2:44 PM, Matthew Depew <mdd0...@gmail.com> wrote:
I think I've found a bug in the zoom feature of the scatter chart.  I've got the following options set:

var options = {
                       height:300,
                       pointSize:1,
                        hAxis:{minValue:new Date(start_dt),maxValue:new Date(end_dt)},
                    explorer:{axis:'horizontal',maxZoomIn:1000,actions:['dragToZoom','rightClickToReset']}};
var chart = new google.visualization.ScatterChart(document.getElementById('chart_div'+index));
chart.draw(data, options);

Whenever I zoom in on the chart, it resets the pointSize to the default (~10 I think). I think the expected behavior should be to maintain pointsize on the re-draw.

Is this a bug, or am I doing something wrong?

Thanks!

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Daniel LaLiberte

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Aug 29, 2017, 3:16:26 PM8/29/17
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That is the only change you should need to load the upcoming version.  

Could you try an earlier version as well, say '45' or '44'?  The breakage I am thinking of only occurred for the current release, so if the problem you are seeing existed previously, then that would be a different problem.


On Tue, Aug 29, 2017 at 2:57 PM, Matthew Depew <mdd0...@gmail.com> wrote:

I changed my load line from
google.charts.load('current', {'packages':['corechart']});
to
google.charts.load('upcoming', {'packages':['corechart']});
and I'm still seeing the issue. Is that change all that is needed to switch to the upcoming version?

On Tuesday, August 29, 2017 at 1:51:10 PM UTC-5, Daniel LaLiberte wrote:
Hi Matthew,

This sounds like a variation on the problem where redrawing the chart disables the explorer mode entirely.  But perhaps this is different since you are getting a different point size than expected.  

I just released v46 (as 'upcoming') which includes a fix of the explorer mode.  Please try it out with your example and let me know.
On Tue, Aug 29, 2017 at 2:44 PM, Matthew Depew <mdd0...@gmail.com> wrote:
I think I've found a bug in the zoom feature of the scatter chart.  I've got the following options set:

var options = {
                       height:300,
                       pointSize:1,
                        hAxis:{minValue:new Date(start_dt),maxValue:new Date(end_dt)},
                    explorer:{axis:'horizontal',maxZoomIn:1000,actions:['dragToZoom','rightClickToReset']}};
var chart = new google.visualization.ScatterChart(document.getElementById('chart_div'+index));
chart.draw(data, options);

Whenever I zoom in on the chart, it resets the pointSize to the default (~10 I think). I think the expected behavior should be to maintain pointsize on the re-draw.

Is this a bug, or am I doing something wrong?

Thanks!

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Matthew Depew

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Aug 29, 2017, 3:23:04 PM8/29/17
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Yep, looks like older versions do not have the bug. 43,44,45 and 45.1 all work fine. The problem appears to start at 45.2. Guess I'll stick with 45.1 until this issue is resolved. Let me know if I can provide any more details to help the debug process.

Also, thanks for the incredibly prompt replies!
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Daniel LaLiberte

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Aug 29, 2017, 3:50:47 PM8/29/17
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OK thanks.  Now that I take the time to reproduce the problem you are seeing, I see it readily.  The same problem applies to lineWidth, 'orientation', and some trendline options.   I can see the cause of the problem, but I am not sure yet how I will fix it.

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Daniel LaLiberte

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Sep 20, 2017, 12:21:58 PM9/20/17
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These problems are now fixed by v46, by the way.

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