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1 vote
35 views

Hello,

Out team have several question about the framework:

  1. Is there a way to make SCIChartSurfaceView background transparent so that the user could see underlying views? We tried using background brush of clear color on SCIChartSurface and making SCIChartSurfaceView backgroundColor transparent but no avail.

  2. Is it possible to add translate/rotate/scale animation to markers/annotations from code?

  3. When using gradient brush with mountain renderable series we found a strange visual artifact (“Gradient artifact” image). Is there a way to fix it?

Best regards,
Vasiliy

0 votes
101 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.

1 vote
61 views

Hi,

I’m attempting to plot on a mountain graph with a DateTimeAxis for the x-axis and I noticed that the plotted time is inaccurate.

The data that am attempting to put in has the following NSDate value: 2017-01-06T10:09:25+0000
Correct me if am wrong, but I believe the time on the axis that ought to be displayed should follow the device’s system timezone? In my case, it is +0800, setting the time to be about 6:09:25 pm

However, the plotted time ends up showing the point to be plotted at 2:09:25 instead.

I’ve tested with a date formatter and it displays the time as it should (6:09:25 pm).
I don’t think I configured anything regarding the axis’s time format, and the insertion of data was done as below:

[self.mountainSeries appendX:SCIGeneric(m.timestamp) Y:SCIGeneric(m.mid)];
[self.chartSurface invalidateElement];

Also, to add on, if I were to extract the XMax value from the axis (in this case, is the timestamp as above), it returns me as such: 2017-01-06 18:09:25 +0000

Thank you.

3 votes
182 views

I will continue to this question here, but with more details. So I need to be able to drag axis annotations separately. Is there any possible way to achieve this in iOS? Basically I subclassed SCIAxisMarkerAnnotation and implemented my own -onPanGesture:At: but it does not separate instances of the class when I try to drag one of the annoation. All moves to same place. How can I detect which annotation is being dragged?

CDAxisMarkerAnnotation.h

#import <SciChart/SciChart.h>
@class CDAxisMarkerAnnotation;

@protocol CDAxisMarkerAnnotationDelegate <NSObject>

- (void)axisMarkerAnnotation:(CDAxisMarkerAnnotation *)axisMarkerAnnotation
           didPanToAxisValue:(double)axisValue;

@end

@interface CDAxisMarkerAnnotation : SCIAxisMarkerAnnotation

@property (weak, nonatomic) id<CDAxisMarkerAnnotationDelegate> delegate;

@end

CDAxisMarkerAnnotation.m

#import "CDAxisMarkerAnnotation.h"

@implementation CDAxisMarkerAnnotation

- (BOOL)onPanGesture:(UIPanGestureRecognizer *)gesture At:(UIView *)view
{
    if (![view isKindOfClass:[SCIChartSurfaceView class]]) {
        return [super onPanGesture:gesture At:view];
    }

    switch (gesture.state) {
        case UIGestureRecognizerStateBegan:
        case UIGestureRecognizerStateChanged:
        case UIGestureRecognizerStateEnded: {
            CGPoint location = [gesture locationInView:view];
            id<SCIRenderSurface> renderSurface = [self.parentSurface renderSurface];
            CGPoint pointInChart = [renderSurface pointInChartFrame:location];
            id<SCICoordinateCalculator> yCalculator = [self.yAxis getCurrentCoordinateCalculator];
            double valueForYAxis = [yCalculator getDataValueFrom:pointInChart.y];
            [self.delegate axisMarkerAnnotation:self didPanToAxisValue:valueForYAxis];
            break;
        }
        default: {
            break;
        }
    }
    return YES;
}

@end

Thanks,
Irmak

0 votes
157 views

Hi,

I have an issue regarding to SCIAxisMarkerAnnotation that I could not find. Can I customise the look of it or should I implement my own axis marker? And can I add another pan gesture to annotation pin so the user can change annotation location on that axis?

Thanks,
Irmak

1 vote
156 views

Hi,

Is there any possible way to get axis value for a point in chart view? I use pan gesture to get the touch location and convert it to its context point but cannot find the value for that CGPoint.

Thanks,
Irmak

0 votes
163 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 months ago
  • last active 3 months ago
1 vote
175 views

Hi,

Am trying to limit the depth in which the user can zoom into and out of the graph. I came across the property minimalZoomConstrain in the header file and also the documentation and had attempted to use it.

The axis in question is a DateTimeAxis and I would want to limit the zoom in depth to 30 seconds and the zoom out the about 3 months. I understand that the type it takes is the GenericType, where I will have to use the SCIGeneric(x) to assign the value, but what value x am I required to use in this case?

I’ve tried the values ’30′(assuming it takes NSTimeInterval) and even attempted to pass in a NSDate value but nothing seems to work.

Thank you.

  • Elle Yeoh asked 4 months ago
  • last active 4 months ago
2 votes
196 views

Hi,
I am currently trying the iOS Charting Library and want to implement a Column series with the drill-down functionality (when touching one of column points by end user). Does the charting component supports the hit-testing or selection feature to determine which point has been clicked at runtime?
Thanks!
Liza

  • liza yudup asked 5 months ago
  • last active 5 months ago
1 vote
241 views

Is it possible to disable editing annotations via user drag?

  • a_edunov asked 6 months ago
  • last active 6 months ago
1 vote
239 views

Hello!
I tried to draw relative line annotations but can’t get expected behavior.

I have a chart with date x axis and numeric y axis. I want to draw line from (x1, y1) to (x2, y2) where:
x1 = deal.startQuoteDate
y1 = deal.startQuoteRate
x2 = deal.endQuoteDate
y2 = deal.startQuoteRate

func activeDealAnnotations() -> [SCILineAnnotation] {
    return bnd_activeDeals.map { deal in
        let lineAnnotation = SCILineAnnotation()
        lineAnnotation.xAxisId = self.xAxisId
        lineAnnotation.yAxisId = self.yAxisId
        lineAnnotation.coordMode = .Relative
        lineAnnotation.style.linePen = SCIPenSolid(color: UIColor.whiteColor(), width: 0.5)
        lineAnnotation.xStart = SCIGeneric(deal.startQuoteDate)
        lineAnnotation.xEnd = SCIGeneric(deal.endQuoteDate)
        lineAnnotation.yStart = SCIGeneric(deal.startQuoteRate)
        lineAnnotation.yEnd = SCIGeneric(deal.startQuoteRate)
        return lineAnnotation
    }
}

I also tried different configurations of the line annotation to check the validity of x and y values.

lineAnnotation.coordMode = .RelativeX
lineAnnotation.xStart = SCIGeneric(0)
lineAnnotation.xEnd = SCIGeneric(1)
lineAnnotation.yStart = SCIGeneric(deal.startQuoteRate)
lineAnnotation.yEnd = SCIGeneric(deal.startQuoteRate)

lineAnnotation.coordMode = .RelativeY
lineAnnotation.xStart = SCIGeneric(deal.startQuoteDate)
lineAnnotation.xEnd = SCIGeneric(deal.startQuoteDate)
lineAnnotation.yStart = SCIGeneric(0)
lineAnnotation.yEnd = SCIGeneric(1)

lineAnnotation.coordMode = .RelativeY
lineAnnotation.xStart = SCIGeneric(deal.endQuoteDate)
lineAnnotation.xEnd = SCIGeneric(deal.endQuoteDate)
lineAnnotation.yStart = SCIGeneric(0)
lineAnnotation.yEnd = SCIGeneric(1)

The lines draws at expected parts of the chart. Now I’m sure that the values are valid and the problem is in the configuration.

Could you help me to do it right?

  • a_edunov asked 6 months ago
  • last active 6 months ago
0 votes
291 views

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

  • a_edunov asked 6 months ago
  • last active 6 months ago
1 vote
307 views

I want to modify the tooltip for data points. For example, I’d like to not show the line that goes down to the X Axis, and the associated tooltip that shows the X cursor location in the X axis area.

Is there a way to do this?

  • doughill asked 7 months ago
  • last active 7 months ago
1 vote
279 views

I want to style one of the data point bars in a column chart to be a different color. Is there any way to do this?

  • doughill asked 7 months ago
  • last active 7 months ago
1 vote
272 views

I’m trying to create a horizontal bar chart, with bars starting at 0 point on the left then going to the right. I do this by putting the X axis at the left and the Y Axis on the bottom. However, setting the X Axis in the Left or Right area still produces a bar chart with the bars starting at 0 on the right and going left.

I thought I could make the Y Axis flipped and this might help. For example, there’s a property called ‘isAxisFlipped’ in SciAxis2D protocol. However, calling has no effect because is says the SciNumericAxis hasn’t implemented this method. I tried subclassing SciNumericAxis and overriding the isAxisFlipped method myself to return true. However, this has no effect as I don’t see this method ever getting called by anyone else.

So, is there a way to do horizontal columns/bar that go left to right?

  • doughill asked 7 months ago
  • last active 7 months ago
1 vote
572 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?

  • a_edunov asked 7 months ago
  • last active 6 months ago
1 vote
380 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?

  • a_edunov asked 7 months ago
  • last active 7 months ago
1 vote
342 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?

  • a_edunov asked 7 months ago
  • last active 7 months ago
1 vote
317 views

Hello!

Great work, thanks a lot for this framework!

Could you provide an example of animated inserting of a new point? My goal is to implement interpolation between previous retrieved and last point on the real-time line chart.

  • a_edunov asked 7 months ago
  • last active 7 months ago
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