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Hi,
I am creating iOS aplication which displays charts based on stocks data.
I want to create box annotations to show when market is open or closed.
I am using CategoryDateTimeAxis to display data but when i add AnnotationCollection with BoxAnnotations to Surface i can not see the annotations.

This is my code for creating box Annotation:

    let pre = SCIBoxAnnotation()
    pre.coordinateMode = .relative
    pre.x1 = SCIGeneric(setDate(date, 4, 0, 0)!)
    pre.x2 = SCIGeneric(setDate(date, 9, 30, 0)!)
    pre.y1 = SCIGeneric(max )
    pre.y2 = SCIGeneric(0)
    pre.isEditable = false
    pre.style.fillBrush = SCISolidBrushStyle(color: #colorLiteral(red: 0.01680417731, green: 0.1983509958, blue: 1, alpha: 0.13))
    pre.style.borderPen = SCISolidPenStyle(color: .clear, withThickness: 0)

I am trying to zoom and pan the line graph in my macOS app the zoom is working but I am not able to pan through the zoomed graph its not at all scrolling and also I wanted to know how can I add click event on the graph so that I can display some more data on click at a particular coordinate apart from tooth. I have shared my view controller. I will really appreciate any help as I have spend a lot of time figure this out and have no clue where to go from here.

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?

I’m trying to create a Modifier for a PieChart Surface. I can not figure out how to get a segment for a point on the screen. With SciChartSurface, you can get the axis, and use its calculator to get a datapoint, or pixel point. Is there something similar in SciPieChartSurface?

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..?

Andrew required swift code so I attach the code.
Please answer my question again.

https://www.scichart.com/questions/question/customize-chart-designwith-pic
https://www.scichart.com/questions/question/cannnot-remove-weird-square-areas

Andrew answered second question, but it didn’t work.
There is no drawAxisBands.

Hi, I’ve found that there is no example of using SciChart in SwiftUI, the swift examples are using storyboard.

I’ve tried that, using SciChart in SwiftUI, and it worked. But I have some confusions about axis update and data update.

in SwiftUI, first I create a chartview struct as NSViewRepresentable, and in func makeNSView(context: Context) -> SCIChartSurface{} to initialize the chartview as any supported SciChart view type.

second, in func updateNSView(_ nsView: SCIChartSurface, context: Context){} to update the data and axis.

When updating axis(like visiablerange), every time I need call nsView.xAxes.clear() to remove axis first and then add axis again.

When updating data, every time I need to call nsView.renderableSeries.clear() to clear current plot data first and then call nsView.renderableSeries.add() to update the data.

My confusion is that is this the right way to do that? It seems not quite efficient.

i want to implement a custom modifier to track the users touch, similar to rollover but without displaying a view

I tried to do this by implementing SCIGestureModifier and overriding all the onTouches methods, but – no matter the user behaviour – the modifier will always receive an onTouchesCancelled event after about a second and receive no more of these events after that.

What does work is implement onPanGesture to actually track all the user’s movement but i don’t see any way of how you would receive a touch up event this way (which i do need)

Is there any fundamental misunderstanding on how this should work on my side?

It would be nice to have an access to repo through CocoaPods. You can create a private spec repo and share with developers. https://guides.cocoapods.org/making/private-cocoapods.html

Hi, guys

I’m very sad because of you.

On my chart i’m added SCIZoomPanModifier with clip mode SCIClipMode_ClipAtExtents. And it well worked before i have updated lib to ‘2.0.1.1748’. Now it’s works the same way as SCIClipMode_StretchAtExtents. But i don’t want to zoom by scrolling at the edge of data.

Can you look at it and fix as soon as possible?

Best regards,
Sushynski Andrei

When i try to run the simple Example from the Documentation ( with my trial License Key ) :

class AppDelegate: NSResponder, NSApplicationDelegate {
override init(){
// Set this code once in AppDelegate or application startup
SCIChartSurface.setRuntimeLicenseKey(“XXXXXX”);
super.init()

}

i receive this error and the application builds but fails to start :

libc++abi: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception ‘License Exception’, reason: ”
terminating with uncaught exception of type NSException

Hello,

I would like to be able to change the rollover tooltip cursor color. It seems to be defaulted to the lineseries areastyle property color. I would like to be able to change it to a different color. I have not been able to find anything in the docs regarding how to do this.

Thank you

Just trying to run the demo using these instructions: https://github.com/abtsoftware/scichart.ios.examples.

It doesn’t work I’m getting “Failed to emit precompiled header” and “SciChart/SciChart.h file not found”

Hi, guys

I’m interesting in alignment for line at SCIAxisMarkerAnnotation. For example for top, middle and bottom position. Like at alignment_to_top.png. So is there some possibility for this?

UDP: Is there possibility to hide annotation from chart view?
Something like setHidden: for UIView.

Best regards,
Sushynski Andrei

I want to develop a rollover in my IOS application, like the example of Using RolloverModifier. However, the axis label & tooltip display of rollover in this example is static, I want to customize a the the label & tooltip that I want, .xib file or coding to develop also fine.

Can anyone help or give suggestions to my problems? Thanks.

Hi all,
I am using the iOS SciCharts version to implement a heatmap series in my application. I am testing out the heatmap by providing a test series of random 100 zValues that range from 1-200. The Heatmap with the stops below just appears blue (see image). My suspicion is that either I am not updating the zValues correctly or the andStops is too low. Can anyone provide insights on what could be the issue?

//Test zValues
let SpectTestArray: [Double] = [ 12,  14, 68, 137, 164, 124, 124, 122, 162, 128, 45, 129,  40,  91,  53, 159,  77,  59,   0,  91, 92,  73,  77,  67, 163,  69, 149, 115,  17,  85, 119, 129, 186,  93,  80,  34, 159, 115,  65, 181, 159,  67, 152,  29,   6, 162,  51, 196, 186, 122, 114, 171, 159, 116,  20, 102,   4, 174, 144, 160, 89,  51,  89, 130, 172, 186,  40, 174,  20, 120, 88, 151, 127, 167,  10,  49, 198,  67, 184, 197, 152, 193, 196, 163,  18,  77,  17, 143, 124, 115, 1, 115, 126,  22,  35,   6,  58, 121,  77,   5]

let colors = [UIColor.fromARGBColorCode(0xFF00008B)!, UIColor.fromARGBColorCode(0xFF6495ED)!, UIColor.fromARGBColorCode(0xFF006400)!, UIColor.fromARGBColorCode(0xFF7FFF00)!, UIColor.yellow, UIColor.red]

CH1HeatMapRenderableSeries = SCIFastUniformHeatmapRenderableSeries()
        CH1HeatMapRenderableSeries.dataSeries = CH1SpectDataSeries
        CH1HeatMapRenderableSeries.minimum = 0.0
        CH1HeatMapRenderableSeries.maximum = 200.0
        CH1HeatMapRenderableSeries.colorMap = SCIColorMap(colors: colors, andStops: [0.0, 0.2, 0.4, 0.6, 0.8, 1.0])
        spectchartsurface?.renderableSeries.add(CH1HeatMapRenderableSeries)

        var Spectvalues = SCIDoubleValues(capacity: 100)

        for n in 0...SpectTestArray.count-1 {
            Spectvalues.add(SpectTestArray[n])
        }
//        print(Spectvalues)
        CH1SpectDataSeries.update(z: Spectvalues)

When i try to add SCITextAnnotation and text color is white, a gray outline appears around the symbol (triangle).
How can I turn it off or change the color?

Hello,

The problem is how to sign the X-axis (the time axis).
How can I change the date and time format on the x axis?
Is this possible when I use the SCICategoryDateTimeAxis?
We use the code from example to set the time format

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

Hi,
Im tryin to create an effect where I have a static point on the Y Axis and I want to perform zoom in, so what I did is to increase or decrease the Max visible range, what I’m left with is the rubber band effect where my static point isn’t static anymore because the point in “Stretching” in the direction I’m zooming.

Hello, I’ve been trying to create a SCIUniformHeatMap, but I only get a blank, black screen.
Can anyone recommend why colors and the graph aren’t showing up? Thanks

var ecmSurface: SCIChartSurface = SCIChartSurface()
var ecmDataSeries = SCIUniformHeatmapDataSeries(xType: .double, yType: .double, zType: .double, xSize: ReviewModeData.MATRIX_COLUMNS, ySize:ReviewModeData.MATRIX_ROWS)
var heatmapRenderableSeries: SCIFastUniformHeatmapRenderableSeries = SCIFastUniformHeatmapRenderableSeries()
private let countColors = 6
private var colorRGBArray: [UIColor] = [
UIColor(red: 0.0/255.0, green: 0.0/255.0, blue: 131.0/255.0, alpha: 1),
UIColor(red: 0.0/255.0, green: 0.0/255.0, blue: 255.0/255.0, alpha: 1),
UIColor(red: 0.0/255.0, green: 255.0/255.0, blue: 255.0/255.0, alpha: 1),
UIColor(red: 255.0/255.0, green: 255.0/255.0, blue: 0.0/255.0, alpha: 1),
UIColor(red: 255.0/255.0, green: 0.0/255.0, blue: 0.0/255.0, alpha: 1),
UIColor(red: 128.0/255.0, green: 0.0/255.0, blue: 0.0/255.0, alpha: 1)
]
for i in 0..<ReviewModeData.MATRIX_COLUMNS {
for j in 0 ..< ReviewModeData.MATRIX_ROWS {
ecmDataSeries.update(z: ecm2DMatrix[i][j], atX: i, y: j)
}
}
var colorZValueArray: [Double] = determineColorMapValues(clim1: 0, clim2: 1);
var colorMap = SCIColorMap(colors: colorRGBArray, andStops: colorZValueArray as [NSNumber])

//configure ECM heatmap
heatmapRenderableSeries.minimum = ReviewModeData.ECM_CLIM1
heatmapRenderableSeries.maximum = ReviewModeData.ECM_CLIM2
heatmapRenderableSeries.dataSeries = ecmDataSeries
heatmapRenderableSeries.colorMap = colorMap!

It seems most of the modifiers bring up tooltip data with a pan, and then it goes away when the user lifts their finger. Is there any way to bring up tooltip data with a tap (and does not go away when the finger has lifted)? The main problem that we’re trying to solve is that we would like to be able to pan to look at the chart (and don’t want an axis pan), but would also like to bring up tooltip data.

I’m tested on iPhone 8 (iOS 13.5.1) and iPad (iPadOS 13.5.1). On iPad the graph always works great but on iPhone sooner or later it always fails.

The exception is always “Thread 1: EXC_BAD_ACCESS (code=1, address=0x11d927ffc)” in the application main:

int main(int argc, char * argv[]) {
@autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); <–
}
}

in the task stack:

SciChart`XValuesProviderWrapper<int>::GetDoubleValue:
0x103b530e0 <+0>:  ldr    x8, [x0, #0x8]
  0x103b530e4 <+4>:  ldr    w8, [x8, w1, sxtw #2]   <--
0x103b530e8 <+8>:  scvtf  d0, w8
0x103b530ec <+12>: ret

The truth is, I have no idea what’s going on. .. Please, anyone know what might be happening?

Thank you very much!

Due to the app upgrade, the code is in objective-c. This is my initialization code:

- (void) loadSciChartSurface:(SCIChartSurface*)surface {
sciChartSurface = surface;
sciChartSurface.translatesAutoresizingMaskIntoConstraints = true;

// scroll
SCIZoomPanModifier *zoomPan = [SCIZoomPanModifier new];
zoomPan.receiveHandledEvents = true;
zoomPan.zoomExtentsY = false;
zoomPan.direction = SCIDirection2D_XDirection;
[sciChartSurface.chartModifiers add:zoomPan];

// zoom
SCIPinchZoomModifier *pinchZoomModifier = [SCIPinchZoomModifier new];
pinchZoomModifier.direction = SCIDirection2D_XDirection;
pinchZoomModifier.scaleFactor = 1.5;
[sciChartSurface.chartModifiers add:pinchZoomModifier];

// series
rSeries = [SCIFastLineRenderableSeries new];
xAxis = [SCINumericAxis new];
yAxis = [SCINumericAxis new];

xAxis.visibleRangeChangeListener = ^(id<ISCIAxis> axis, id<ISCIRange> oldRange, id<ISCIRange> newRange, BOOL isAnimating) {

    int min = newRange.minAsDouble;
    int max = newRange.maxAsDouble;
    int center = (min + max) / 2;

    if (center <= 0) {
        axis.visibleRange.min = @(0.0 - xHalfWidth);
        axis.visibleRange.max = @(xWidth - xHalfWidth);
    } else if (center >= dataSamples) {
        axis.visibleRange.min = @(dataSamples - xHalfWidth);
        axis.visibleRange.max = @(dataSamples + xHalfWidth);
    } else {
        // xWith is updated to keep the zoom factor in limits, when (center <= 0) or (center >= dataSamples)
        xWidth = max - min;
        xHalfWidth = xWidth / 2;
    }
};

[SCIUpdateSuspender usingWithSuspendable:sciChartSurface withBlock:^{
    [sciChartSurface.xAxes add:xAxis];
    [sciChartSurface.yAxes add:yAxis];
    [sciChartSurface.renderableSeries add:rSeries];
    [SCIAnimations sweepSeries:rSeries duration:0.0 andEasingFunction:[SCICubicEase new]];
}];

dataSeries = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Int yType:SCIDataType_Short];

// x
xWidth = theFileFormat.mSampleRate * MIN_SECONDS_IN_GRID * 1;
xIndex = 0;
xHalfWidth = xWidth / 2;
xAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:0.0 max:xWidth];

// y
yAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:SHRT_MIN max:SHRT_MAX];

[self loadDefaultStyle];

}

Have recently converted to xcode 10 and swift 4.2.

Am now receiving this error message on build.

SciChart.framework/SciChart
Reason: no suitable image found. Did find:
/usr/lib/libstdc++.6.dylib: mach-o, but not built for iOS simulator

Any ideas?

I am considering applying server-side licensing for my javerScript application.

In the document below, there is a phrase “Our server-side licensing component is written in C++.”
(https://support.scichart.com/index.php?/Knowledgebase/Article/View/17256/42/)

However, there is only asp.net sample code on the provided github.
(https://github.com/ABTSoftware/SciChart.JS.Examples/tree/master/Sandbox/demo-dotnet-server-licensing)

I wonder if there is a sample code implemented in C++ for server-side licensing.

Can you provide c++ sample code?
Also, are there any examples to run on Ubuntu?

How to make chart axis (date axis in my case) to move with scrolling?

Because currently labels staying on it’s positions and just refreshing its values.

let xAxis = SCIDateTimeAxis()
xAxis.axisId = ChartWrapper.SURFACE_MAIN_X_AXIS_ID
xAxis.autoRange = .never
xAxis.visibleRange = sharedXRange
xAxis.style.drawMajorBands = false
xAxis.style.drawMajorTicks = false
xAxis.style.drawMinorTicks = false
xAxis.style.drawMinorGridLines = true
xAxis.textFormatting = "HH:mm:ss"
xAxs.style.drawLabels = true

Best regards, Vadim

Hi,

I’m trying to achieve the looks of DateTimeCategory XAxis as shown on uploaded screenshot.

Formatting a single row of tick labels is not a hard task (setTextFormatting). The problem arises when there are 2 rows with same frequency (days of the week and dates) and third row with lower frequency (years).

I tried using new line character in text formatting property to break the line for days and dates and it didn’t work. I also tried having two axes bound to the same data series, each one having different formatting and majorDelta, but it seems that they don’t stack up (only first one added is shown).

Any ideas?

Hi

I have a SCIFastLineRenderableSeries backed by data in SCIXyDataSeries.

I setup FIFO to 300 (this just a number I may increase, but it stores 30+ seconds of data)

x data is time stamp.

each time I have new data, I set a new visibleRange to show about 30 seconds of data on screen

xAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(secondSinceStart-31) Max:SCIGeneric(secondSinceStart)];

So this will scroll along showing latest 30 seconds of data. And that’s great.

But I want to scroll to the left to view the older data. because of the visibleRange is set I am not able to touch the axis labels and do anything)

how do I set the visibleRange or maybe not set it, so I can enable the scroll.

Here is the drag modifier I use , but I think it does not do anything either because of the visibleRange
SCIXAxisDragModifier * xAxisDragmodifier = [SCIXAxisDragModifier new];
xAxisDragmodifier.dragMode = SCIAxisDragMode_Pan;
xAxisDragmodifier.clipModeX = SCIClipMode_None;

Thanks

Hello, I’m trailing your library right now. I’m wondering how to change the background color of the legend box. The document page for LegendModifier shows coming soon. I don’t see such option in LegendModifier definition in Xcode either. Thanks

Hi,

I’m trying to convert Java code to swift and I need the AnnotationLabel’s setAxisLabelStyle equivalent.

AnnotationLabel annotationLabel = new AnnotationLabel(getContext());
annotationLabel.setLabelPlacement(LabelPlacement.Axis);

            annotationLabel.setAxisLabelStyle(new Action1<AnnotationLabel>()
            {
                @Override
                public void execute(AnnotationLabel annotationLabel)
                {
                    annotationLabel.setFontStyle(new FontStyle(37.0f, Color.BLUE));
                    annotationLabel.setBackgroundResource(R.drawable.current_price);
                }
            });

How can i apply this code in swift?

I am using latest version of SciChart through Pods. I am using trial key for now.

I have made all the views under the chart clear. And have tried the code below but the background appears to be shades of black.

     let yAxis = SCINumericAxis()
     let xAxis = SCINumericAxis()
     self.surface.xAxes.add(xAxis)
     self.surface.yAxes.add(yAxis)

     self.surface.backgroundColor = UIColor.clear
     self.surface.isOpaque = false
     self.surface.renderableSeriesAreaFill = SCISolidBrushStyle(color: UIColor.clear)
     self.surface.renderableSeriesAreaBorder = SCISolidPenStyle(color: UIColor.clear, withThickness: 0)

Good day! I have download this zip archive SciChart_iOS_SDK_4.2.0.5533.zip, on my laptop. Opened it and can not find the file SciChart.xcframework, according description from this article. I need to add library to Xcode frameworks, but I can not do it. Please can you tell me where can I get this file.

Hi guys,

I just started using SCICHART. I am working my way through the provided tutorials and i noticed that when i add a SCITooltipModifier to the chart, all my other modifiers (zoom and pan and pinchzoom) stopped working. Is this normal? Because i want my chart to have zoom functions and show what datapoints are touched by a user.

Thanks in advance!

Is the styleFor function of SCIPaletteProvider that was in Version 2.0 not implemented in Version 4.8?
Also, are there any plans to implement it?

I am upgrading from SciCharts 2.0.1 to SciCharts 4.3.
When the color was set using SCI Palatt Provider in Version 2.0, the memory used was 200M, but in Version 4.3, the memory used may consume as much as 1G.
I tried to devise it by setting the Sampleing Mode, but it is not very effective.

SCI Charts is used to display the spectrum data of audio data while playing the sound.