moveViewToX

[donaldkingdt]

Hi,

I'm trying to set the chat to scroll to last value in data set X using moveViewToX(entries.count) but this doesn't seem to move to the last value. Any Ideas?

Cheers

[danielgindi]

You are passing an invalid index

[donaldkingdt]

My data set has up to 1100 data points, i want to move to the last index. Shouldn't this be the right value? if not, how can i get it?

[danielgindi]

1099

On Thu, Jul 30, 2015 at 3:32 PM, donaldkingdt [email protected]
wrote:

My data set has up to 1100 data points, i want to move to the last index.
Shouldn't this be the right value? if not, how can i get it?

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#258 (comment)
.

[donaldkingdt]

How is that about? pls explain as this should be dynamic. 1099 doesn't work

[danielgindi]

The first item is at 0

[donaldkingdt]

Exactly my point. The last item should be at lastItem.count right?

[danielgindi]

No. If you have two items, and first one is 0, then the second one is 1. Which means that you cannot pass 2 for the last item of two, but 1.

[donaldkingdt]

self.chartView.setVisibleXRangeMaximum(20)
self.chartView.moveViewToX(self.measurementEntries.count - 1)

self.measurementEntries.count has 1136 entries now but I don't want to show all of this on the chart as it would be just an overkill. I only want to show a maximum of 20 at anytime but initially, scroll to the last value in the index.

does this look right?

[donaldkingdt]

Fixed. Had to call self.chartView.moveViewToX(self.measurementEntries.count - 1) in ViewDidAppear().

Cheers Daniel. BTW, @danielgindi I sent you a PayPal donation yesterday :)

[yas375]

Had to do similar thing in viewDidAppear as well. It results in weird jump to the most recent values. But if I do this in viewWillAppear then I get the wrong position with partly blank graph.

Happy to share more details about the issue if needed.

[NicolasLourenco]

I've the same issue.
I have 28 points and I show only 4 in a view.
I want to show (in the first time) the last point of my dataSet. But with this method, I've a blank space a the right of my last point. Any idea?

[_lineChartView moveViewToX:_lineChartView.data.yValCount-1];
[_lineChartView zoom:7 scaleY:0 x:0 y:0];

[daisoreanu]

the thing is from what I noticed that you will get another plotted value to the right side, also you should change the order of the lines from:
[_lineChartView moveViewToX:_lineChartView.data.yValCount-1]; [_lineChartView zoom:7 scaleY:0 x:0 y:0];

to:

[_lineChartView zoom:7 scaleY:0 x:0 y:0]; [_lineChartView moveViewToX:_lineChartView.data.yValCount-1];