Get the CGPoint location in chart.frame of any bar

[Miguel]

Hi, 

I need to draw a small image at the left of each horizontal bar outside of the chart. 

To get a good align with the bars, I want to know the location of any bar in the chart.frame. (See the attached file).

Who can I get it?

Thanks!

[Jack]

Hi Miguel,

You can use the locationOfPoint method in TKChartSeriesRender class to get exact coordinates for each point in TKChart. Use the renderForSeries method in TKChartPlotView to get the series render. Here is an example:

TKChartSeriesRender *render = [_chart.plotView renderForSeries:_chart.series[0]];
CGPoint pt = [render locationOfPoint:_chart.series[0].items[1] inSeries:_chart.series[0]];
NSLog(@"%f, %f", pt.x, pt.y);

Please note that this method will return correct results only when TKChart is visible on screen. So, you can't call this method in viewDidLoad method. Use the viewDidAppear method instead.

Feel free to contact us if you have further questions.

Regards,
Jack
Telerik

[Miguel]

Hi!, thank you

But finally I do this:

TKChartPlotView *plotView = _chart.subviews[1];
CALayer *layerGrid = plotView.layer.sublayers.firstObject;
_hGrid = layerGrid.frame.size.height;
NSLog(@"frame: %@",NSStringFromCGRect(layerGrid.frame));
_pntOgrid = [self.view convertPoint:CGPointZero fromView:plotView];
NSLog(@"ptoOrigen: %@", NSStringFromCGPoint(_pntOgrid));
//. . .

Regards

[Adrian]

Hello, Miguel,

Thank you for this update. I am glad to understand that the issue is solved.
In case you need further assistance, do not hesitate to contact us.

Regards,
Adrian
Telerik