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0 votes
7k views

Hi,

I’ve been looking through ways to have to y-Axis scale for really small changes/values.

For example, I’m attempting to plot 10 values between 0.99300 to 0.99400, and the changes between points can vary between 0.001 to 0.0001 or so (basically, really small changes)

However, my y-Axis seems to always start at 0 and the y-Axis major ticks are always at most a 0.1 difference, making the graph look flat.

I’d like to achieve the following:
– Scale to the smallest value i can scale to.
– Have my y-Axis to not necessarily start at 0.

I’ve tried the following:

Setting up y-Axis:

    self.yAxis = [SCINumericAxis new];
    [self.yAxis setStyle:axisStyle];
    self.yAxis.axisId = @"yAxis";
    [self.yAxis setGrowBy:[[SCIDoubleRange alloc]initWithMin:SCIGeneric(0) Max:SCIGeneric(0.1)]];
    [self.yAxis setAutoRange:SCIAutoRange_Always];
    [self.chartSurface attachAxis:self.yAxis IsXAxis:NO];

Regards.

0 votes
4k views

Hi, guys

I want to show two renderableSeries on one chart view. These series have common x-axis (SCICategoryDateTimeAxis) and separate y-axes(SCINumericAxis). Only one of y-axis is visible at chart view. Also the data series of visible renderable series updated by scrolling to left or to right. So for displaying on one view i’m using:

[y1Axis setGrowBy: [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.3) Max:SCIGeneric(0.07)]];
[y2Axis setGrowBy: [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.0) Max:SCIGeneric(5)]];

So it’s look good at start (Correct_zooming.png). But after some scrolling it decrease axis extents of invisible y-axis (decrease.png).
Or even breaks down (broken.png)

For test i’m using SCIFastOhlcRenderableSeries and SCIHorizontallyStackedColumnsCollection readerable series.
Data series for SCIHorizontallyStackedColumnsCollection is initializated like:

    [volumeSerie1 updateAt:index Y:SCIGeneric(100000 / [multiplier doubleValue])];
    [volumeSerie2 updateAt:index Y:SCIGeneric(500000 / [multiplier doubleValue])];

So can you look at it?
Or what way i should implement this behavior?

Best regards,
Sushynski Andrei

1 vote
6k views

I’ve got error message during compilation:

 ld: bitcode bundle could not be generated because '.../Frameworks/SciChart.framework/SciChart' was built without full bitcode. All frameworks and dylibs for bitcode must be generated from Xcode Archive or Install build for architecture armv7

I temporary disabled bitcode for target. Will you fix it in the next build?

0 votes
4k views

Hi,

I’ve encountered an issue with the candlestick graph I’ve drawn that consists of a set of random X date time values – this causes the candlesticks have varying distances from one another.

Rendering the data from an initial set seems to be fine but as I run a NSTimer to add on more points, the body of the new candlesticks seem to be 0. (Note, the date time values are still random but have been made to be set after the last placed point)

In fact, the initial data points that I added see to be rendered ‘body-less’ if it’s within the same visible range as the newly added points. And if I pan along the newly added points, the bodies of some data points will appear at random visible ranges.

Is this a normal behaviour or should I take anything else into consideration?

Here are a couple of my configurations which I think may have affected anything:
1. My XAxis has set its visible range limit mode to ClipMode_Min
2. Candlestick series style data body width is set to be default.
3. I have a the following modifiers set up.

self.xDragModifier = [SCIXAxisDragModifier new];
self.xDragModifier.axisId = @"xAxis";
self.xDragModifier.dragMode = SCIAxisDragMode_Pan;
self.xDragModifier.clipModeX = SCIZoomPanClipMode_ClipAtMin;
[self.xDragModifier setModifierName:@"XAxis DragModifier"];

self.pinchZoomModifier = [[SCIPinchZoomModifier alloc] init];
[self.pinchZoomModifier setModifierName:@"PinchZoom Modifier"];
self.pinchZoomModifier.xyDirection = SCIXYDirection_XDirection;

self.zoomPanModifier = [SCIZoomPanModifier new];
self.zoomPanModifier.clipModeX = SCIZoomPanClipMode_ClipAtMin;
self.zoomPanModifier.xyDirection = SCIXYDirection_XDirection;
[self.zoomPanModifier setModifierName:@"ZoomPan Modifier"];

SCIModifierGroup * gm = [[SCIModifierGroup alloc] initWithChildModifiers:@[self.xDragModifier, self.pinchZoomModifier, self.zoomPanModifier]];
self.chartSurface.chartModifier = gm;

The points are drawing just fine, but the body of the candlestick is not appearing as expected.

Thanks in advance.

  • Elle Yeoh asked 4 years ago
  • last active 4 years ago
0 votes
3k views

Hi

I am developing a Xamarin iOS application and I’m using a SCIPieChartSurface. I can create the chart and set its values, but is is not possible to auto-update the donut with new data.
I am trying to update the value by doing:

myDonut.MyPieSegment.Value = newValue;

But nothing happends…

I heard it was a bug in the API for Android a month ago, is this similar? Or am I doing something wrong?
Thanks in advance!

Best regards
Jonas

0 votes
3k views

Hi, guys

What is the minimum required sdk version for SciChart v.2?

Such as i have some trouble with IOS 9. See attachment.

Same behavior at real devices.

Can you look at this?

Best regards,
Sushynski Andrei

2 votes
6k views

From your documentation:

4.9 Annotations

SciChart features a rich Annotations API, that allows you to place UIKit UIElements over the chart.
SciChat provides a number of built-in annotations, but you can also create your own.

SCIBoxAnnotation, SCILineAnnotation and SCITextAnnotation are cool, but sometimes it’s not enough.

Is it possible to render UIView on the chart (at least UIImage)?
Is it possible to draw dashed line annotation?
Could you provide an example of creating custom annotation class?

0 votes
2k views

Hi, guys

My x axis is SCICategoryDateTimeAxis class type. And it’s limited by VisiableRangeLimit like:

[xAxis setVisibleRangeLimit:[[SCIDoubleRange alloc] initWithMin:SCIGeneric(firstItem – (lastItem – priorItem))
Max:SCIGeneric(lastItem + (lastItem – priorItem))]];

Also for scrolling my content inside chart:

SCIZoomPanModifier * zpm = [[SCIZoomPanModifier alloc] init];
[zpm setModifierName:@"PanZoom Modifier"];
[zpm setClipModeX:SCIZoomPanClipMode_ClipAtExtents];

Like a description SCIZoomPanClipMode_ClipAtExtents says:
“forces the panning operation to stop suddenly at the extents of the data” – but it’s not working constantly.
Sometimes it’s allow to scroll outside the range. Like on the attached image.

So my question is how to limit scrolling by min and max value?

Best regards,
Sushynski Andrei

0 votes
1k views

When search this forum, I found that we can achieve it by adding point marker. But I am getting this error when trying to add point marker :
‘Operation: setPointMarker: is not avaliable on type: SCIHorizontallyStackedColumnsCollection’

let me know this feature(round top corners of bars) is availble or not ! Or is there any way to do this ?

1 vote
2k views

Hello

is there a way to set the padding (aka reduce the gap) between bars in a SCIFastColumnRenderableSeries?

I attach a screenshot of my current situation: I would like to have zero margin between columns.

I tried searching in the knowledge base but all the answers I found seem to refer to APIs not available in the iOS SDK

.

There is not such class method in the iOS SDK called SciChartSurface.Padding

Thanks for your help

1 vote
1k views

Hello, I’m having an issue when I put multiple surfaces in an iOS view. Only the one made first is shown and there is a black space in place of the other. I swapped the order of creation and now the other is visible instead. Does anyone know why this is happening or have suggestions for putting multiple surfaces in an iOS view? Thanks

1 vote
1k views

Hi SciChart team,

there is a working example that implement a Polar Chart type for iOS?
I was unable to find anything in the documentation. Only for WPF platform.
If not, there is a plan to support this kind of chart in next release of the library?

Thanks for the help.

0 votes
5k views

On device, there is an unwanted border line on the SCIChartSurface. Please refer to the screenshot.

I tried removing this by setting the border width and setting it’s colour as white as below
self.surface.view.layer.borderColor = [[UIColor whiteColor]CGColor];
self.surface.view.layer.borderWidth = 2.0f;
However, this does not set the border of the SCIChartSurface.

How do I remove this unwanted border line?

  • Chui asked 4 years ago
  • last active 4 years ago
0 votes
1k views

I’m getting the following crash:

2020-02-14 16:45:43.902812-0500 CommonStock Development[2425:710225] -[SCIRolloverModifier onTouchesCancelled:]: unrecognized selector sent to instance 0x282ffe080
2020-02-14 16:45:43.904098-0500 CommonStock Development[2425:710225] *** Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘-[SCIRolloverModifier onTouchesCancelled:]: unrecognized selector sent to instance 0x282ffe080’

whenever I try to scrub my chart, I must also note that in order for the legend to show, I have to tap really hard on the surface.

This is my code:

func set(data set: SimpleChartDataSet, alternate: SimpleChartDataSet) {

    let lineDataSeries = SCIXyDataSeries(xType: .double, yType: .double)
    let dashedDataSeries = SCIXyDataSeries(xType: .double, yType: .double)

    let group = DispatchGroup()
    group.enter()

    DispatchQueue.global(qos: .userInteractive).async {
        for (index, i) in set.enumerated() {
            lineDataSeries.append(x: Double(index), y: Double(i))
        }

        for (index, i) in alternate.enumerated() {
            dashedDataSeries.append(x: Double(index), y: Double(i))
        }

        group.leave()
    }

    group.notify(queue: .main) {

        let lineSeries = SCIFastMountainRenderableSeries()
        lineSeries.zeroLineY = set.min() ?? 0.0
        lineSeries.dataSeries = lineDataSeries
        lineSeries.strokeStyle = SCISolidPenStyle(color: UIColor.green, thickness: 2.0)
        lineSeries.areaStyle =  SCILinearGradientBrushStyle(start: CGPoint(x: 0, y: 1), end: CGPoint(x: 0, y: 0), start: UIColor.green, end: UIColor.clear)

        let dashedSeries = SCIFastLineRenderableSeries()
        dashedSeries.zeroLineY = set.min() ?? 0.0
        dashedSeries.dataSeries = dashedDataSeries
        dashedSeries.strokeStyle = SCISolidPenStyle(color: UIColor.white, thickness: 2.0, strokeDashArray: [2.0,2.0,2.0,2.0])

        SCIUpdateSuspender.usingWith(self.surface) {

            self.surface.xAxes.clear()
            self.surface.yAxes.clear()
            self.surface.renderableSeries.clear()

            let xAxis = SCINumericAxis()
            xAxis.drawLabels = false
            xAxis.drawMajorBands = false
            xAxis.drawMajorGridLines = false
            xAxis.drawMinorGridLines = false
            xAxis.drawMinorTicks = false
            xAxis.drawMajorTicks = false
            xAxis.drawLabels = false

            let yAxis = SCINumericAxis()
            yAxis.drawLabels = false
            yAxis.drawMajorBands = false
            yAxis.drawMajorGridLines = false
            yAxis.drawMinorGridLines = false
            yAxis.drawMinorTicks = false
            yAxis.drawMajorTicks = false
            yAxis.drawLabels = false

            self.surface.xAxes.add(items: xAxis)
            self.surface.yAxes.add(items: yAxis)
            self.surface.renderableSeries.add(items: lineSeries, dashedSeries )
            self.surface.chartModifiers.add(SCIRolloverModifier())
        }
    }
}
0 votes
3k views

Hi, guys

I have some data series like:

[[SCIXyDataSeries alloc] initWithXType:SCIDataType_DateTime
                                 YType:SCIDataType_Double
                             SeriesType:SCITypeOfDataSeries_XCategory];

Also my Y axis is kind of class SCINumericAxis

So my question is

if i’m trying add value to the series

[volumeSerie appendX:SCIGeneric(bar.time) Y:SCIGeneric([bar.volume doubleValue])];

and my bar.volume is bigger than 2 147 483 648 (float limit as i’m know). It’s leads to a axis range crash. Like on the attached image.

So what should i use to handle huge values?
Like a billions and more

Best regards,
Sushynski Andrei

0 votes
778 views

Currently we have two graph surfaces with two Y axes on each side and we need all of the Y axes to have fixed width size. Until now we were achieving that like this:
topGraphSurface.LeftAxisAreaForcedSize = 45;
topGraphSurface.RightAxisAreaForcedSize = 45;
bottomGraphSurface.LeftAxisAreaForcedSize = 45;
bottomGraphSurface.RightAxisAreaForcedSize = 45;

but since updating to the new SciChart v3 we get the error “SciChartSurface does not contain a definition for (Left)AxisAreaForcedSize”. I couldn’t find any information about this in the Migration guide, so is there a way to achieve this in the new version?

0 votes
1k views

Hi,

I am using SciChart_iOS_SDK_3.0.0.5074 with Swift 5.

I want to show string type on X-axis. I am using below code snippet.

class YearsLabelProvider: SCILabelProviderBase<SCINumericAxis> {

   var xLabels: [String] = ["Test", "Test", "Test", "Test", "Test", "Test", "Test", "Test",     "Test", "Test", "Test", "Test", "Test", "Test"]

   func update(_ axis: ISCIAxisCore!) { }

   override func formatLabel(_ dataValue: ISCIComparable!) -> ISCIString! {
        let index = Int(dataValue.toDouble())
        return NSString(string: index >= 0 && index < xLabels.count ? xLabels[index] : "")
    }

    override func formatCursorLabel(_ dataValue: ISCIComparable!) -> ISCIString! {
        let index = Int(dataValue.toDouble())

        var result: String?

        if (index >= 0 && index < xLabels.count) {
            result = xLabels[index]
        }
        return NSString(string: result!)
    }
}

Application crashes while loading with the following error –

” *** Terminating app due to uncaught exception ‘Initializer not allowed Exception’, reason: ‘Parameterless initializer of Chart.YearsLabelProvider class shouldn’t be used. Please use one of the designated initializers instead'”

Kindly help us resolving this issue since this is a showstopper issue.
I would also like to know about what data SCIXyDataSeries accepts when we are working with strings.

0 votes
3k views

I have a simple line renderable series in iOS with an SCIDateTimeAxis for X and an SCINumericAxis for Y. At this point all I’m trying to do is format the Y-axis labels and cursor labels as currency. According to the documentation, this should be as simple as:

yAxis.textFormatting = "$%f"

But it does not appear to properly use this formatting. The Y-axis is showing values like “$%f1400” when formatting a value for 14.

So, I instead attempted creating my own label provider by overriding SCINumericLabelProvider:

class CurrencyLabelProvider: SCINumericLabelProvider {

static let formatter: NumberFormatter = {
    let formatter = NumberFormatter()
    formatter.numberStyle = .currency
    return formatter
}()

override func formatLabel(_ dataValue: SCIGenericType) -> NSAttributedString! {
    let value = dataValue.doubleData
    let string = CurrencyLabelProvider.formatter.string(from: NSNumber(value: value))!
    return NSAttributedString(string: string)
}
}

Then assigning:

yAxis.labelProvider = CurrencyLabelProvider()

This works to properly format the axis labels. So, I also override SCINumericLabelProvider to provide the cursor labels:

 override func formatCursorLabel(_ dataValue: SCIGenericType) -> NSAttributedString! {
    let value = dataValue.doubleData
    let string = CurrencyLabelFormatter.formatter.string(from: NSNumber(value: value))!
    return NSAttributedString(string: string)
}

This then properly formats the cursor label for the Y-axis- but it also formats the X-axis cursor:
Formatted Cursor

At this point, the X-axis is already assigned an SCIDateTimeLabelProvider- the X-axis is not assigned CurrencyLabelProvider. But it seems to be overridden by the Y-axis label provider or simply unused. The X-axis labels are formatted as dates properly, but X-axis cursor values are just numbers when not being interfered with by the Y-axis label provider.

Am I misunderstanding something or are these all bugs in the iOS SDK? We’re currently evaluating whether this package will meet our needs and it certainly appears to be riddled with issues.

  • Sean Young asked 2 years ago
  • last active 2 years ago
1 vote
3k views

We’d like to customize the look of our legends. We have 4 legends displaying different data, but right now the only thing we can change is the Theme. Is there any way to customize the legend items, like add some icons, change the point marker shape and size, change the check box icon etc…

P.S.: I’m not a trial user. We have an iOS, Android and WPF licenses purchased.

Project info:
Xamarin.iOS
SciChart.iOS 2.2.2.854

0 votes
2k views

I’m try to generate a UIImage from a SCIChartSurface into a graphic context using the code below from a view that is not displayed on the screen. The image created is pure black, which indicates it did not draw. If I display the graph in a view on the devices screen, the graph draws correctly.

UIGraphicsBeginImageContextWithOptions(self.chart.bounds.size, NO, 0.0);
[self.chart drawViewHierarchyInRect:self.chart.bounds afterScreenUpdates:YES];
UIImage *chartImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

Are there any special steps that are needed to draw into a graphic context?

1 vote
1k views

Stacked Bar chat: If we give 0 values, there are Black lines showing at middle of screen. please see attached screen.

-1 votes
2k views

Hello Team,

In Pie Chart with DonutSeries, the segment spacing seems to have no effect on graph.

donutSeries.segmentSpacing = 10

Thanks

2 votes
4k views

Trying to install SciChart.iOS NuGet package for Xamarin.iOS project results the following error:

Package SciChart.iOS 2.0.1.527 is not compatible with xamarinios10 (Xamarin.iOS,Version=v1.0). Package SciChart.iOS 2.0.1.527 supports: xamarinios (xamarin-ios,Version=v0.0)

Wondering what the heck is “xamarin-ios,Version=v0.0”? It must be xamarinios10. We’re considering to buy SciChart but right now our build server is stuck on this error. As a workaround, we raname xamarin-ios to xamarinios10 in the lib directory but this not an option for a cloud build server.

  • rubs00 asked 4 years ago
  • last active 4 years ago
0 votes
989 views

If we set ClipMode.None we can pan infinitely to the uncharted space of left and right. this is fine.
But I want to do panning infinitely only to the left side. So I set ‘clipAtMax’. This is stop panning at right. But instead of panning infinity to the left, it is stretching the left part.
Any solution ?

0 votes
3k views

Hi, guys

Is it possible to set min and max zoom constraints for renderable serie with one element ?
Default value (default_zoom.PNG) is too big.

Can you look at this?

Best regards,
Sushynski Andrei

0 votes
229 views

Good day guys. I have download SciChart_iOS_SDK_4.2.0.5533 on Macbook M1. And try to integrate ios-arm64_armv7 verions to my project. I have added SciChart.xcframework to frameworks in Xcode 12.4. But the build is failed with a few errors:

  1. unable to load standard library for target arm-64-apple-ios9.0
  2. Failed to build module ‘SciChart’ from its module interface, it may have been damaged or it may have triggered a bug in Swift compiler when it was produced.

Can you tell me please did I use the right version of SciChart.xcframework for apple silicone? And how to solve this errors?

0 votes
1k views

I cannot get SCILinearGradientBrushStyle working on a donut chart. Only radial gradients work

Here is my code sample:

let segment = SCIPieSegment()
segment.fillStyle = SCILinearGradientBrushStyle(colorCodeStart: 0xff007aff, finish: 0x4D007aff, direction: .horizontal)
segment.value = 100.0
segment.title = "Segment"
donutSeries.segments.add(segment)

The segment just renders a flat color

0 votes
4k views

Hi, guys

Is there possibility to show tooltip by simply changing switch at the settings?
Not by tapping at the chart area as it implemented now.

Best regards,
Sushynski Andrei

2 votes
2k views

I’m trying to create a spectrum viewer with your library. One important feature is a cursor supporting both automatic mode and manual mode. In automatic mode, it stays at the maximum value. In manual mode, it moves with finger panning. It’s close to the SCICursorModifier with the cross lines, but it should always stay on the plot even without touch. Also it should reside on real data points instead of anywhere in between like the SCIRolloverModifier instead of the SCICursorModifier.

Could you give me some advices about how to achieve it? Thanks.

EDIT: after reading more of your documents, I believe HorizontalLineAnnotation and VerticalLineAnnotation are the way to go. I have already added them as the automatic mode cursor. For the manual mode, I still need your help to achieve either:
1) a callback function for the VerticalLineAnnotation drag event, so that I could move both lines to the corresponding data point
or
2) a custom ZoomPanModifier to allow me to distinguish one point or two points touch: one point panning to move the whole plot and two points panning to determine the new cursor location and redraw the two annotations there

EDIT2: I was able to create a custom VerticalLineAnnotation class to handle the panning event. There is one more question left. Right now in order to update the verticallineannotation and horizontallineannotation on the graph, I remove them from sciChartSurface.annotations, change x/y locations and add them back. Is there a redraw or refresh or update function to call directly?

Thanks

  • Haoran Xie asked 2 years ago
  • last active 2 years ago
0 votes
2k views

Hey again!

Is there kind of a delegate that notify me if the user uses the crosshair/SCIRolloverModifier?
I want to know which value he is inspecting to show him further information outside the chart for this datapoint.

Thanks and Greeting
Benedikt

1 vote
213 views

Try to integrate new SciChart.xcframework 4.2.0 instead of SciChart.framework 2.0 to the project and build failed in Xcode 12.4 with the next errors:
RNSciCandlestickChart.swift:
1) 335th line: Editor placeholder in source file
dates.add(date!))
2) 549th line: Cannot convert value of type ‘Bundle.Type’ to expected argument type ‘Bundle’ SCIThemeManager.addTheme(byThemeKey: theme, from: Bundle)
3) 768th line: Method does not override any method from its superclass
override func internalHandleGesture(_ gestureRecognizer: UIGestureRecognizer)
AnnotationDragListener.swift:
1) 4th line: Cannot find type ‘SCIAnnotationDragListener’ in scope
class AnnotationDragListener: SCIAnnotationDragListener
RNSciLineChart.swift:
1) 475th line: Editor placeholder in source file
SCIThemeManager.addTheme(byThemeKey: theme, from: Bundle)
Can you tell me please can I launch SciChart.xcframework 4.2.0 in Xcode 12.4? Any how to solve this issues?

1 vote
5k views

Hello!

Please take a look at the attached screenshot first.

I have a chart configured to draw real-time trading data. X axis type is DateTime. Y axis type is Float. I need to draw vertical expiration time line.

I tried to draw coordinate relative line annotation as follows:

var date: NSDate = NSDate()

let lineAnnotation = SCILineAnnotation()
lineAnnotation.xAxisId = self.axisXId
lineAnnotation.yAxisId = self.axisYId
lineAnnotation.coordMode = .SCIAnnotationCoord_RelativeX
lineAnnotation.style.linePen = SCIPenSolid(color: Style.Chart.ExpirationDateLine.Color, width: Style.Chart.ExpirationDateLine.Width
lineAnnotation.xStart = SCI_constructGenericTypeWithInfo(&date, .DateTime)
lineAnnotation.xEnd = SCI_constructGenericTypeWithInfo(&date, .DateT            

self.chartSurface.annotation = lineAnnotation
self.chartSurface.invalidateElement()

I tried to play with different coordMode values. Line does not appear. Could you help me with this task?

0 votes
3k views

I’m trying to make a chart with a “toggle function”.

The “toggle function” what i wanted to make is this.

  1. enter to UIViewController which Chart is in it
  2. before singleTap on a chart, a chart has zoomPanModifier, XAxisDragModifier,, etc
  3. after make singleTap on the chart, that chart has only CursorModifier.
  4. CursorModifier’s UI stays on chart without disappearing and i can move crossed line to specific point i want (just like what CursorModifier originally does)
  5. another single tap on chart would make a chart to have all other modifiers but CursorModifer.

What I have made successfully was 1,2,3,5 . not 4.

The way i was going to solve this problem was make fake touch event on Chart view and
snatch UIGestureRecognizer Event and let ChartView think they’re being touched till I give stop signal

But I heard that there is no more way to pass fake touch to UIView.

So I’m feeling difficulty on this problem…..

is there any easy way to solve this problem?

TL;DR;

I WANT TO MAKE CURSORMODIFIER’ UI STAYS ON A CHART!

+)
(lldb) po SciChartVersionNumber
0x3ff0000000000000

(lldb) po SciChartVersionString
0x474f525029232840

I wanted to know what version I’m using.. but i couldn’t know… what version am i using..?

0 votes
2k views

When calling SCIThemeManager.ApplyTheme(Surface, SCIThemeManager.SCIChart_Bright_SparkStyleKey); within a the code-behind running on the iPhoneSimulator running iOS 13.2, the iOS system throws an Objective-C exception with the following details:

Foundation.MonoTouchException: 'Objective-C exception thrown.  Name: NSInternalInconsistencyException Reason: applyThemeProvider: must be implemented in subclass

Although the exact same pattern works without issue on the corresponding Xamarin.Android project and the examples that call this line seem to be OK too, it is not clear from any documentation what this issue could be. Any advice would be appreciated.

0 votes
4k views

Hi there.

It’s has been asked here:
https://www.scichart.com/questions/question/custom-annotation

So, Is it possible to draw dashed line annotation at the current version 1.2.3.982?

Best regards,
Sushynski Andrei

0 votes
2k views

Hi guys,

Is it possible to capture the tap event when we tap on a point marker or a data point? I can see there’s a DataPointSelectionModifier for WPF, but there’s nothing for iOS. Our goal is to show a popup (tooltip) on the point marker when the user taps on it.

Thanks,
Lazar Nikolov

0 votes
1k views

I would like to change the color of chart legend, but have failed to find information on how can I do this for iOS. Any sort of tutorial would be highly appreciated.

Worst case scenario would be to create a custom theme that is based on Bright Spark theme and update legend parameters there, but for this I would need to know what exactly does Bright Spark theme looks like.

Looking forward to any recommendations.

Best Regards,
Paul.

0 votes
3k views

Hi, guys

Is it possible to use negative index for methods:

-(void) insertAt:(int)index X:(SCIGenericType)x Open:(SCIGenericType)open High:(SCIGenericType)high Low:(SCIGenericType)low Close:(SCIGenericType)close;

-(void) updateAt:(int)index Open:(SCIGenericType)open High:(SCIGenericType)high Low:(SCIGenericType)low Close:(SCIGenericType)close;

Can you give an answer?

Best regards,
Sushynski Andrei

0 votes
2k views

We have lots of Point Markers in our series that overlap, so we’re trying to find a way to Cluster them in Android and iOS. I can see that there is an SCIPointMarkerClusterizer. Can you give us some pointers on how we can achieve point marker clustering and/or spacing?

0 votes
3k views

Hi

I am developing a Xamarin iOS application and I’m using a SCIPieChartSurface. I can create the chart and set its values, but it is not possible to auto-update the donut with new data.
I am trying to update the value by doing:

myDonut.MyPieSegment.Value = newValue;

But nothing happends…

0 votes
2k views

I am placing annotations at the top of every bar in a stacked bar graph (and a standard bar graph on another screen) showing the total of all the stacked bars by iterating through my data, generating the sum, and placing it at the correct x,y (an incredibly manual process that seems like there should be much easier to do but I found no other way to do it – if there is a better way, I would love to hear it, but that’s a secondary issue and not my current problem).

I also have a legend where the user can select / deselect series.

When the user selects/deselects a series from the legend, I need to hide all my annotations and then recreate them because the sums of the stacked bars has changed (or if no bars are showing, remove my annotation completely). My assumption is I could reiterate through my data and check series to see if they are visible (isVisible) and recalculate the sums and recreate the annotations (another very manual process but I can probably work it out).

My primary problem is I see no way for me to intercept that this legend event occurred. The series get hidden internally and I never have a chance to do anything with the annotations. It seems like this may be doable on other platforms but I’m at a loss on iOS. There is no delegate / block event handler / etc.

Any thoughts?

0 votes
783 views

I’m trying to clear a SCIUniformHeatmapDataSeries after connecting it to a SCIChartSurface, but it is very slow and energy consuming. However, if I clear the data series before it is connected to the sci chart, then the clearing is pretty fast. How can I clear the data series after it is connected to the chart surface quickly? Do I have to make a new data series, clear it, and connect to the scichartsurface every time I want to clear a data series? This is for iOS by the way.
EDIT: code

for i in 0..<data.MATRIX_COLUMNS {
        for j in 0..<data.MATRIX_ROWS  {
            data.ecm2DMatrix[i][j] = Double.nan
            SCIUpdateSuspender.usingWith(charts.ecmSurface) {
                self.data.ecmDataSeries.update(z:self.data.ecm2DMatrix[i][j], atX: i, y: j)
            }
0 votes
2k views

Hi.
I’m in process optimizing my app.
I’m using Objective-c.

I’d found some memory leaking issues and successfully fixed some of that.

A first issue was about ‘renderableSeries’ under ‘SCIChartSurfaceView’.
If you set class of UIView as ‘SCIChartSurfaceView’ in interface builder and make outlet without setting ‘strong’ or ‘weak’ in .m file,
It never get released automatically and will stay retained on memory.
For me, it caused about 90MB of memory leaking.
But I could solve this issue manually by putting -(void)clear; method of renderableSeries in viewWillDisappear method.

Another issue is about ‘SCIDateTimeDeltaCalculator’ and ‘SCINumericDeltaCalculator’.
It causes about 50MB of memory leaking.
But problem is, I couldn’t find neither where it’s been called nor how I release this manually.

I will be waiting for your answer.

Thanks.

+)
(lldb) po SciChartVersionNumber
0x3ff0000000000000

(lldb) po SciChartVersionString
0x474f525029232840

I wanted to know what version I’m using.. but i couldn’t know… what version am i using..?

1 vote
2k views

We’re trying to make multiple legends on the screen, for example, 1 for the left axis and its data series, 1 for the right axis and its data series. I can see it’s possible in the WPF documentation, but in the iOS documentation it says “Coming soon!”. Do we need to wait for a future release of the Xamarin.iOS library or is it possible somehow now?

By the way, I’m not a trial user. We’ve just purchased a license today.

Thanks,
Lazar Nikolov

0 votes
2k views

I’m trying to add annotations on a chart but they are rendering above my legend.

Initially (similar to most of the demo code I’ve seen), I setup my modifiers, then created my series and animated them in — then added my annotations (adding to annotationGroup). This created a timeline of blank chart surface with legend (good so far), annotations popping in before the chart series animated in (weird / not good) and on TOP of the legend (really bad), then the animation of the series after that.

I’ve tried about everything I can think of and the best I’ve been able to do is use a completion block of the animation rendering the series — and moved my chart modifiers (and legend) into that completion block. If I put the annotations in the completion block, they will render after the chart modifier and I have the same problem (even if placed after the chart modifiers). I have to set the annotations before the animation, and then the chart modifier in the completion block will work and the legend will be above the . Of course, this is a bit odd too — as first my annotations pop up by themselves on the blank surface, followed by my series animating in, then at the end of the 2 second animation, the legend just pops in.

I really would like my legend to be rendered first on the blank surface and the annotations and chart series to animate in together under my legend. I’m gathering that’s unlikely (at least the animation part) — but is there anyway I can place my legend first and still have the annotations go under it? It feels like the layers should be: modifiers > annotations > rendered series. I also I’ve read this order before in some WPF docs I believe, but doesn’t seem to be respected on iOS?

UPDATE: My current work around isn’t sufficient because I really need access to the renderable series to create the annotations which means I really can’t defer my chart modifiers (i.e. legend) until after the annotations. Additionally, if I need to update (remove / re-add) an annotation due to a series being deactivated in the legend, now my annotations are on top of the legend again.

0 votes
4k views

Hi, guys

My x axis is SCICategoryDateTimeAxis and i’m want to draw grid line with custom period. Let’s say every four hours for data with a period of thirty minutes. What is the best way for that?

Can i redifined axis’s tickCoordinatesProvider?
Can you provide some example?
Or it only possible with axes annotations ?

Best regards,
Sushynski Andrei

0 votes
2k views

I want to hide the axis and the place occupied by the axis on xammarin.iOS, i’am using below code to do the same, the problem here is it does hide the axis but it is not removing the place occupied by axis,

Axis.IsVisible = false;

is it the right way to hide the axis and remove the place occupied by it, or am I missing something here.

0 votes
2k views

How would I go about doing this in swift?

0 votes
3k views

Hi, guys

Is it possible to draw axis line at axis area? See attachment.

0 votes
2k views

Hi Guys,

I am not able to figure out solution for handling NAN values in iOS which is available in Android in case of FastLineRenderableSeries.

Thanks

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