Arction Support Forums

Dear developers,

We are proud to present - world's most advanced and fastest charts for UWP!

This new version comes with lots of new features, including Trading Charts for WinForms.

Happy coding!

Dear Developers,

we made good new version. It has

Performance improvements, up to 2x - 10x

User experience improvements in the Interactive Examples application, with plenty of new WPF MVVM examples added

And plenty of minor improvements and bug fixes

Go to our downloads to get it

Dear Developers, we have released LightningChart v.9 for WPF and WinForms. It comes with a lot of new stuff, but the biggest things are 1. LightningChart® Trader - Easy to Trading Charts library, built over robust and fast LightningChart API. Trading-480x231.png 2. Interactive Examples - Browsing, r...

Hi Developers, good news, we have now 8.5.1 version available. It comes with - New DevCenter application as starting point in accessing the development resources and seed projects - New, more handy and visually appealing License manager - Mesh model improvements - Polar chart improvements - Volume r...

Dear Developers,

8.4.3 version is now out

.
It contains several important fixes. Login to Customer Portal and get the new files from there, or from Nuget.

Hi Developers,

A new maintenance version 8.4.2 is now available

Hello,

Cylindrical and Spherical coordinate systems though a converter classes, were added in v.8.4.

Spherical:

: Spherical 3D coordinates view; Spherical.jpg (220.8 KiB) Viewed 7504 times

Cylindrical:

: Cylindrical 3D coordinates view; Cylindrical.jpg (229.07 KiB) Viewed 7504 times

Dear developers, We just released 8.4.1 version, including lots of changes and performance optimizations, e.g. new rotation system in 3D optimized camera fitting to show 3D contents new faster orthographic view 3D point clouds capacity improvement, max point clouds size 120 M - 140 M data points Deb...

Hello,

Please see "Deployment" section in User's Manual. It tells what DLLs to deploy, and how to set DeploymentKey.

Hi guys,

we have a new important maintenance release available. Go to Download center or Nuget to get it.

Hello,

you mean pressing mouse left button down over the axis?

By default, it does Pan.

Or do you mean dragging over the graph area? Set ViewXY.ZoomPanOptions.LeftMouseButtonAction = Pan.

The bar series in 2D or 3D don't have palette coloring support directly. In 3D we have made an example with SurfaceMeshSeries, "ExampleSurfaceMeshBars". Is 3D approach applicable to you? For 2D, there's several ways to achieve multi-colored bars. E.g. If each bar should be of one color only, Creatin...

AutoDivSeparationPercent only applies when using AutoDivSpacing = true. When AutoDivSpacing is used, it’s always trying to find “nice numbers”, that is, based on numbers 10, 5 or 2 as Division. When Percent = 0, based on the range, the labels come very close to each other. Practically label rectangl...

Hello, OK... you are not using FormatValueChanged, therefore that can't be the reason. I investigated it a little bit and it seems a limitation floating point accuracy in axis labels computation. When decimal count is high, the label rectangle size is calculated inaccurately. We will investigate thi...

Are you using FormatValueLabels event handler?

Hello,

set axis.AutoDivSpacing = True. It seems you have manually set the division spacing and if the divisions overlap, the labels won't be rendered.

This was solved by Support by e-mail...

PointLineSeries requires points to be in ascending order by X. To use arbitrary order, use FreeformPointLineSeries.

Hello,

so it seems to be a computer-specific problem. First, make sure all Windows Updates have been installed, and Intel drivers updated.

If the problem doesn't solve, please send us email on support [at} arction.com, and we'll give more detailed support there

Hi,

most likely reason for this, is to forget to Control.Invoke (WinForms) or Dispatcher.Invoke (WPF) when updating data from background thread to chart. For correct usage, please see ExampleThreadMultiChannel example in the demo applications.

Hi EvenChu, Difficult to help on this as it seems to be GPU driver related problem, or limitation of Intel. Please set chart.ChartRenderOptions.DeviceType = HardwareOnlyD9 / HardwareOnlyD11 / SoftwareOnlyD11. Does any of these work? Intel HD GPUs are of different types. Can you indicate which kind o...

Hi, ViewXY has BeforeZooming and AfterZooming events available for making special zooming behavior, such as limiting the zooming. _chart.ViewXY.BeforeZooming += ViewXY_BeforeZooming; private void ViewXY_BeforeZooming(object sender, BeforeZoomingXYEventArgs e) { if (e.XRanges[0].NewMin < 0) { e.XRang...

Please be more specific in your question... so we are able to answer.

Are you talking about Gauges demo application's ExamplePressureGauge? Have you noticed there's also ExampleThermometer?

Here's the updated example code for v.8.

MultipleAsyncWPFWindows_v8.zip: Example project for v.8; (274.86 KiB) Downloaded 1496 times

Hi,

RAM changing or adding doesn't require license reinstall.
For more complex setup changes, we recommend uninstalling and deactivating the license before changing hardware or settings, and then installing and activating it again.

Index out of bounds exception can happen if ViewXY.XAxes list is empty. Please check you have added an axis there.

Dear Developers,

today we release a new improved version of LightningChart. Download it from our Download center

Also ViewXY.Zoomed and BeforeZooming events are available.

And RangeChanged event of axes.

Hi developers,

new 8.2.2 is now available. It's a maintenance version with bug fixes and small enhancements. Enjoy

Hi, SurfaceMeshSeries3D is best for this case. Calculate the X, Y and Z values for each node. Keep in mind the adjacency of the nodes. Please take a look at at - Surface mesh, heat dissipation - Surface mesh demos Most extensive demo set is available in WinForms demo app. Another approach is MeshMod...

Hi Developers, I thought to share info how to set bands to show Fibonacci retracement levels in a trading chart. The levels are got from data Y min... Y max, and applied to 0%, 23.6%, 38.2%, 50%, 61.8% and 100% between that range. I'm using Semi-bindable WPF chart here. Set their references in your ...

Hi, Yes, possible. LC has probably hundreds of properties to control axis positioning and layout. Axes can be positioned by setting their Position property, as percents of chart width or height. Automatic axis placement must be disabled. e.g. chart.ViewXY.AxisLayout.XAxisAutoPlacement = Off chart.Vi...

If the point style and color, and line width and color, have to be changed per line segment, I think the best way is to use N count of FreeformPointLineSeries, 2 points in each. I also recommend changing to Non-Bindable LC Wpf API. using System; using System.Collections.Generic; using System.Linq; u...

Hi Harry, if you don't need to plot the points, but just the lines, we recommend using LineCollections for best performance in this case. <lcusb:ViewXY> <lcusb:ViewXY.LineCollections> <lcusb:LineCollection x:Name="lineCollection"> <lcusb:LineCollection.LineStyle> <lcusb:LineStyle Color="#FFFF7400" W...

Hello, Giving exact performance comparison between these editions is impossible as it depends on the use case so much. Non-bindable is fastest because we can use parallel computation for practically everything, and the data point arrays can be accessed directly in linear memory space. Binding needs ...

Hello, the reason Arction.DirectXFiles.dll is not automatically included as reference, is that it is a massive big file. It is only needed when there's no correct DirectX assemblies already in the system. Arction.DirectXInit.dll routines check the existing dlls and load if Arction.DirectXFiles.dll w...

Hello TomRTC,

All the points are initialized as (0,0,0) as default. It just seems you haven't set values for all the points?

Hi Developers, now have a version with lots of new features available... using from Windows Service, zooming and legend box improvements, bar series BaseLevel setting, and 3D MeshModel construction programmatically from array of vertices, normals, indices and bitmap features. We hope you like this v...

Hi Heather,

please check that "Prefer 32-bit" is not enabled in your Project options. That may prevent using more than 2GB memory

If you have only like 2 different bitmaps, using 2 PointLineSeries could work as well (both ~15 k points), and setting PointStyle.Shape = Bitmap. It should render much faster, but may produce Z order issues in your app.

Hi!

Please try SeriesEventMarkers or ChartEventMarkers, without any text on them. Markers support bitmap image as well, and are more lightweight objects than annotations.

Hello,

WinForms don't support transparent background of controls. Therefore LC doesn't support that either.

In our WPF chart, transparent background is supported.

Dear developers,

A new version is now available with some bug fixes and optimizations

We have scheduled ViewXY.MarginsUpdated or equivalent event adding preliminary in 8.3. Currently you can subscribe to chart.BeforeRendering or AfterRendering event, and read ViewXY.GetMarginsRect(). If the rect has changed compared to previous round, margins have changed, and you can position your o...

Just iterate thru the data point array and find the nearest diff.

Like

Code: Select all

double nearestDist = double.MaxValue; 
int nearestIndex = -1; 

for(int i=0;i<series.PointCount;i++)
{
double dist = Math.Abs(x - dataPoints[i].X); 

if(dist < nearestDist)
{
nearestDist = dist; 
neartestIndex =i; 
}
}

Unfortunately there is not...

With series.PointStyle.Color1, Color2, Color3 and BorderColor. All the points will appear with same colors.

Hi Heather,

have you tried to use cursor.PositionChanged event?

Hi Andres,

set ViewXY.AxisLayout.AutoAdjustMargins = false,
and set ViewXY.Margins explicitly.

To have thin Y Axis, set axis.AxisThickness = 1

You can do that e.g. with following approaches: 1) Subscribe to axis.RangeChanged event handler, and set CustomAxisTicks in there. Set AutoFormatLabels = False, and CustomTicksEnabled = true. 2) Create secondary(extra) X and Y axis, and set their grid manually by setting AutoDivSpacing = False, and ...

Hi Claudio,

to clip the data in a segment, set series.LimitYToStackSegment = true.

Dear developers,

we released 8.1.4 today, containing bug fixes and couple of new examples.

Happy coding

Hi Andres,

If they are XY charts, I recommend creating a graph segment for each chart. So you end up with 1 LightningChart, which has 4 segments stacked. If they need to be side-by-side, or other chart types than XY, each chart must be created separately.

This was handled by e-mail, and solved by using LC v.8.

Note: even if v.7 has preliminary support for ALF license, the license keys we deliver, are compatible only with v.8. Do not try to use ALFs in v.7.

Hello,

Databreaking has affect for performance. Simply calling Double.IsNan() for each point take excessive time.

What version are you using. According to our version log, there's an improvement in 8.1.3 version.

Using other value than NaN is faster, like double.MinValue.

Hi Developers!

we made a new version available. This a version containing minor improvements and bug fixes.

You can find it from our Download Center, trial downloads, Nuget etc.

Cheers

Hello Mr Jung, 1-2) You must enable the data breaking in the series. You can select which value to use for breaking (not just NaN), and is it enabled or not. DataBreaking.jpg Please see LightningChart User's manual, section "DataBreaking by NaN or other value" for details. And also check Demo applic...

Hello, can you please check Arction.DirectXFiles.dll is in place it can find it? And actually check all DLLs required: • Arction.Wpf.Charting.LightningChartUltimate.dll (if using Non-bindable WPF chart) • Arction.Wpf.SemibindableCharting.LightningChartUltimate.dll (if using semi-bindable WPF chart) ...

Hello, when activating a developer license to a machine, it takes internet connection to our server. If using a floating license, it takes connection to our server. In the runtime, the deployed app doesn't take internet connection. It also opens internet connection when using tile data for Maps. Oth...

We made a preliminary optimization / fix for this performance issue. We'll need to run more tests but it seems we can include it in the next assembly pack or installer

Hello, LC uses lots of parallel computation, and it will bog down the CPU in this kind of application with that many series. Max core count can be configured only from LC source code, it's defined as constant there. Currently it is 'All available cores'. Another reason for sluggishness is GPU. It ha...

The data point arrays themselves take approx. 240 MB. If preferring low memory footprint, replace PointLineSeries with SampleDataSeries. Set SampleFormat = SingleFloat. Data array memory requirement will drop from 24 bytes / data point to 4 bytes / data point. Also setting series.LineStyle.Width = 1...

Hi Hariselio, Here's Winforms example... appears within a couple of seconds in my system. When having lots of series, keep LegendBox visible = false. using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System....

1 px border overrun on the right side in annotations is probably because the have Shadow. Disable it... should help with that.

Dear developers,

we have now a new great version available, with significant improvements to 3D features and touch screen functions.

See new version main features here: here

We hope you like the new version

Reason: Desktop development features are not installed.

Solution: Launch Visual Studio Installer.

: Visual Studio Installer; VS installer.jpg (101.83 KiB) Viewed 7537 times

Press Modify

: Desktop development; Desktop development.jpg (183.07 KiB) Viewed 7537 times

Select .NET Desktop Development.

And then Modify from the bottom right corner.

Solution: Launch Visual Studio Installer.

: VS installer; VS installer.jpg (101.83 KiB) Viewed 7042 times

Press Modify.

: .NET desktop development; Desktop development.jpg (183.07 KiB) Viewed 7042 times

Select .NET Desktop Development.

And then Modify from the bottom right corner.

Hi Andres,

most likely you have created extra-sized SeriesPoint[] array, and filled only the beginning of it. It seems you have 0,0 points in the tail. Give exact length array to Points property.

Hi Andres,

set yAxis.AutoDivSpacing = false, yAxis.MajorDiv and MajorDivCount.

For details, please see User's manual part 6.2.6, "Divisions".

From your description I understood you are creating new charts with clicks. If you create too many LightningCharts without disposing existing ones, it may take time until Garbage Collector collects and frees memory. Please see if using GC.Collect() helps, before creating more charts. How many charts...

Hi, Probably it's running out of memory or graphics resources. When getting rid of old charts, please ensure you are calling chart.Dispose(), otherwise the charts and graphics resources are not freed. There's only a limited count of charts you can have live at a same time, depending on the system. T...

We keep AreaSeries in mind in the future. Currently we can't allocate much more resources for ViewSmith development as so few developers need it.

Hi Lokesh,

ViewSmith does not support heatmaps or contours, sorry.

Hi,

we have example with rectangle selecting. Please check if this fulfills your requirement:

: Rectangle selecting; rectangle-selecting.jpg (341.25 KiB) Viewed 6011 times

Hi Axel, LightningChart supports several ways to solve data points, under mouse, or specific location. It also has tools to solve multi-series values from gigantic data sets. In many series types, there's SolveNearest*** methods to solve nearest data point to given (x,y) value, or screen coordinate....

Hi! We unfortunately don't know internal implementation of Geometry or PathGeometry. There might be some helper routines to extract different paths separately and access their binary data, which you could utilize to compose a PolygonSeries or FreeFormPointLineSeries points array. I don't know how we...

Fixed in our code base. Will be included in next v.8 update.

Please say if you want us to send you unofficial test version for verifying the fix.

Thanks. Reproduced successfully with your code.

Resolving it now.

Hi Matthias, After the fix in August 31, 2016, we are not able to reproduce the problem. I tested with v.8 by using Lissajous example, selecting XY chart, (the middle big one) from property editor, going to ViewXY->FreeformPointLineSeries[0]->PointCountLimit = 1. Changed PointCountLimit to various n...

Hi Lokesh,

that approach needs using two CustomAxisTicks per tick position. One with text and one without it. Give a slightly higher value for tick with a text. You can utilize yAxis.CoordToValue and ValueToCoord method to convert between screen coordinates and axis values as necessary.

Hi,

You don't need to install LightningChart SDK. Just follow User's Manual's chapter "Deployment". It explains which dlls to deploy, and how to set a Deployment Key in your application.

Hi,

to show horizontal line going from left edge to right edge at specific Y value, simply use a ConstantLine (in ViewXY.ConstantLines).

Hi, I have 15 line plots in 4 view segments and need to identify the Y axis when hovering over the plot line with mouse. Highlighting the Y Axis Label when the respective plot is highlighted would be great. You can do that by using series.MouseOverOn event handler. You can highlight the Y axis title...

Other way is just not to show Units at all in LegendBox, and include units in the series.Title.Text ="Intensity (µT)";

Hello, we made high-resolution spectrogram example in our demo application. It replaces the old High-resolution spectogram (which was renamed as Spectrogram). E.g. with 4K Ultra-HD resolution (both screen and data resolution), scrolling FPS is > 50 with my Intel i7 and Nvidia GTX 960. No down-sampli...

Hello,

Even we made WARP rendering, it does not unfortunately solve the problem.

Currently, using LC in background service is not supported.

Hello,

This should resolve the problem:
viewtopic.php?f=16&t=941&p=3428&hilit=mixed#p3428

LightningChart v.9.x can be found on NuGet as follows: WPF chart: https://www.nuget.org/packages/LightningChartWPF9/ WinForms chart: https://www.nuget.org/packages/LightningChartWinForms9/ WPF SignalTools: https://www.nuget.org/packages/ArctionSignalToolsWPF9/ WinForms SignalTools: https://www.nuget...

Dear LightningChart users,

New version available, enjoy

Hi Greg,

series type doesn't have anything to do with it.

I used your code in ExamplePointLineSeriesXY Winforms example, and it sets the log axis correctly.

So, you probably have reference to wrong chart, or wrong x axis (if you have many of them).

Best regards,
Pasi

Please check you have set xAxis.ScrollMode = None. In real-time scrolling modes, log X axis can't be used.

Hello, you could also utilize axis.GetMajorTicks() to learn the tick positions. Use that info to format the labels. Note that GetMajorTicks returns the latest rendered positions. Using CustomAxisTicks is the "ultimate" way to do it, you get explicit control of positions of ticks, and formatting of l...

Hi Igor, Yes, it is in v.8. The legend boxes can be aligned left/top/right/bottom side of the graph segments, or margins. Control the position with Position property. Position options are: TopCenter, TopLeft, TopRight, LeftCenter, RightCenter, BottomLeft, BottomCenter, BottomRight, Manual. And for s...

Hi Lokesh, there's unfortunately no copy constructors or cloning methods in our objects. Just create a new object, and set the properties by your code, according to the appearance you prefer. ChartError event handler produces output where you should mainly be worried about Errors, but not Warnings. ...

Hi Greg,

I'm sorry to say, LineSeriesCursor supports only series than inherit from ITrackable. FreeformPointLineSeries is not such.

Instead, please use freeformPointLineSeries.SolveNearest*** methods to find the nearest data point by mouse coordinate or given X,Y point.

We have added a property now to control the order of Annotations vs. Axis. It's coming in v.8 soon.

Hi Lokesh, one should not change the parents after creating objects. ChartError event handler should give a warning if you do that. Please create chart, then series. If you need to create a series later, recreate it from scratch for the existing view. We strongly recommend creating series with their...

Hi Lokesh,

please set ViewXY.AxisLayout.AutoAdjustMargins = false, and set margins rectangle manually in ViewXY.Margins.

Hi ! Annotation has lot of properties to control the positioning. When annotation.LocationCoordinateSystem == RelativeCoordinatesToTarget, you can control the offset with annotation.LocationRelativeOffset.X and Y properties. There's also explanation of the annotations' positioning in the User's Manu...

Hi Greg, :shock: In our WinForms demo's Lissajous example, by setting XY chart's FreeformPointLineSeries' PointCountLimit to 1M, the data monitoring is still smooth, even with point symbols on, and zoom happens instantly. Lissajous chart in the middle.jpg Do you happen to have NaNs, Infs or similar ...

Added OwnerChart getter property in upcoming v.8, for all Views.

Hi Lokesh, It seems there's no direct property or method to resolve the owner chart. It's rather assumed the programmer has the known reference to the chart, and then references the View like chart.ViewXY. But we can add a getter property for Views to return the owner chart in future versions. Begin...

Point taken. We'll discuss adding functionality to render the annotations before or after the the axes.

Hi,

annotations don't unfortunately support rendering over axes. Please try if you can achieve preferred functionality with X axis Title or X axis Units. They support fill and border as well.

Probably the out-of-memory comes because you have quite massive set of bars. Bars are complex to render. Please replace your BarSeries with a LineCollection (in ViewXY.LineCollections). You can draw bars with them as well, and they are more compact and faster.

You can use axis.GetMajorTicks() to get list of tick values that were used in rendering the previous time.

Hi, it can be best made with our WPF chart, by applying 90 degrees rotation transform. You can experiment with that, bu running our WPF demo application and pressing the rotation buttons (e.g. L90) The borders can be made e.g. by setting ConstantLine for position of each Y axis' Minimum and Maximum....

Hello... I think this was already answered but for some reason the reply is not visible here anymore. :shock: Pixel size can't be controlled directly. For simplicity, I'll just explain X dimension... grid.RangeMinX and RangeMaxX set the axis range the IntensitySeries is stretched to. Grid.SizeX tell...

Dear developers,

a new improved version 7.2.5 installer is now available in our download. Hopefully you are happy with it

Hello,

LC v.5 is not maintained or supported anymore.

The mouse hit test is probably taking time. Set series.MouseInteraction = false to disable it.

LC v.7 has faster mouse-hit testing than v.5.

Hello :) I think there's not built-in feature for that. Maybe in Chart.SizeChanged event handler, you could investigate graph segment's height, by chart.GetGraphSegmentInfo().SegmentHeight. If it's small, switch to use CustomAxisTicks. Add 3 Ticks with your preferred values, and labels. Remember to ...

Hello,

you didn't indicate which version you use, but based on namespace, it is some v.6.xxx?

Binding is supported in

Arction.Wpf.SemibindableCharting
Arction.Wpf.BindableCharting

namespaces of v.7.

Hi Hendrik, FreeformPointLineSeries's IndividualPointColoring approach I tested gave about 25% - 50 % of refresh rate of IntensityGridSeries, so that approach is not optimal. In the other hand it gives additional appearance options, such as other shapes than square as well. Instead I sent you a new ...

Hello, please download 7.2.4.3 assemblies.

7.2.4.2 is a buggy build.

If you want to show some margins, add this code:

Code: Select all

  
//Apply manual margins 
_chart.ViewXY.AxisLayout.AutoAdjustMargins = false;
_chart.ViewXY.Margins = new Thickness(20, 30, 20, 20);

: Hidden axes with margins; HiddenAxesWithMargins.jpg (41.39 KiB) Viewed 13629 times

Hi, <Window x:Class="WpfApplication1.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <Grid Name="gridMain"> </Grid> </Window> using System; using System.Collections.Gener...

We optimized spectrogram rendering quite a lot. We are hoping to finish it this week and send a new version for your tests.

Dear customers,

new assembly pack 7.2.4.3 is now available in our customer downloads and Nuget

OK, I'll experiment with different approaches and get back to you with optimal approach.

Hello, the spectrogram can be shown in so many different ways. Heatmap / bitmap based, points based, line based, 3D surface based, 3D waterfall based etc... E.g. by using High-resolution spectrogram example, data resolution of 2000 x 1000, solid > 60 FPS refresh rate can be achieved. spectrogram2000...

Arrows are coming in v.8, it's been programmed.

: Orientation arrows 3D; OrientationArrows.jpg (22.99 KiB) Viewed 10307 times

Hi Hendrik,

doesn't the approach shown in "High-resolution spectrogram" example suit your purposes? It's not a line spectrogram exactly, but uses IntensityGridSeries instead.

What kind of resolution are you planning to display? Frequency resolution x Time resolution? How many updates / sec?

Problem confirmed. We'll issue a fix soon. Apologies

There's some specific combination of X, Y, Z rotation angles that are impossible for trigonometric functions.

This is one them, and there's currently no way we can fix it. You've found already a workaround, so I suggest using that.

Hi, you can set xAxis.Visible = false yAxis.Visible = false or - setting transparent colors to axis elements, - setting ViewXY.AxisLayout.AutoAdjustMargins = false - setting ViewXY.Margins = (0,0,0,0) - setting axis.LabelsVisible = false - setting axis.Title.Visible = false - setting axis.MajorDivTi...

Hello, the wireframe of IntensityGridSeries isn't suitable for this kind of border. Using FreeformPointLineSeries with IndividualPointColoring = true, LineVisible = false, and border shown in the points, may work for you. Fast it is at least... But you'll have to position the points correctly and pr...

When a sharp color change is required, you'll need to add two points with same coordinates. Blue and Red. Otherwise GPU interpolates colors between two coordinates.

Ok. Please set RangeChanged event handler for the X axis. In the event handler, call yAxis.SetRange with preferred range.

Hello. You can set chart.ViewXY.ZoomPanOptions.RightToLeftZoomAction = RevertAxisRanges. When applying zoom-to-fit gesture (default action for right-to-left zooming) it will set X and Y axes ranges from xAxis.RangeRevertMinimum to xAxis.RangeRevertMaximum and yAxis.RangeRevertMinimum to yAxis.RangeR...

Hello.

If you want to have borders (and text) in each cell, I would recommend creating a table of AnnotationXY objects and setting fill color from palette to them.

Hello, the coloring of XY line is made screen-coordinate based. Therefore, when zooming out a lot, the other side of a thick line may have different color than the other. It is a limitation of the palette-coloring feature. You may want to try if using series.CustomLinePointColoringAndShaping event w...

Hello, when several data points hit the same coordinate in X dimension, like in this case, it shows the tracking point as the middle point of those values. In this case, when peak solving is required, another approach is needed: Hide the tracking point from cursor: set cursor.Style = VerticalNoTrack...

Hi all,

new version is now available, with bunch of bug fixes and demo application improvements.

Hi Igor,

thanks for your valuable input.

We'll consider these in future versions.

Hi developers, Here's how to make a simple Gantt chart with LightningChart. The example was written using 7.2.3 version non-bindable WPF chart. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Wind...

Hello :-) the GPU is probably running out of graphics resources and therefore causing exception like this. Please run your application in 64-bit mode (Any CPU) in 64-bit Windows, then it can use more memory. The chart count in integrated Intel machines can be quite low, like 10. In real GPUs with AM...

Hi Matthias,

I tested using version 7.2.3 and problem didn't appear with that. Please update.

Hi all,

LightningChart 7.2.3 is now available, containing small improvements and bug fixes.

Transparency has serious limitations in 3D. It depends on the object order in the series collections and camera angle. You can use max 1 transparent or translucent series in the chart.

Hi Greg,

The rendering order matters here. Alpha test is made against stuff already rendered on the backbuffer. The Surface series are rendered in the order they exist in the View3D.SurfaceGridSeries collection. Please change the order of the collection, that should help

In v.7, there's a lot of new properties to address the needs presented here...

: Custom axis ticks properties; CustomAxisTicks.jpg (68.68 KiB) Viewed 9932 times

- give tick line length
- style as tick / grid / both
- color individually

E.g. by assigning a different color and line length, it's possible to show them as major & minor ticks.

Hi Jürgen, Currently we have almost direct approach available: Using IntensityGridSeries with PixelRendering = true, and using SetColorsData + InvalidateColorsOnly approach I'm creating a image data on the fly here. Using 2500 x 2000 resolution (5 MP), it runs approx 20 FPS with NVidia GTX 960. usin...

Hello, I made this test app. Red Y axis has CustomAxisTicks. When giving new range for the red axis, the space adjusts correctly. CustomTicksInRedAxis.jpg using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using Sy...

Hi,

Automatically, not possible.

In SizeChanged event handler of the chart, you can set chart.View3D.Dimensions.X, Dimensions.Y and Dimensions.Z according to your preferences.

X and Z are 100 by default. Y is 50. Growing Dimensions.X in this case to like 400 would be needed.

Bug confirmed. We'll provide fix in upcoming versions.

Hi Matus,

I tried to reproduce the problem, but I wasn't able to. Could you please send small project to reproduce it?

What version are your using?

Hi Copilot, Help resources We have: User's Manual in Support http://arction.com/support . The Manual explains what kind of objects LightningChart has and describes the most important features with pictures. The manual also install in the hard drive. Help files (API description). You can find it in t...

I'm glad this was solved.

Please set LegendBox.Offset correctly. It's default (-50, -100).

Multi-segment chart has several Segments specified in ViewXY.AxisLayout.Segments. Setting AxisLayout.YAxisLayout=Segmented applies it.

There's e.g. this example in the demo applications:

: Multi-segment chart; multi-segment-chart.jpg (526.32 KiB) Viewed 20784 times

Are all the charts in scrollable container? If so... the overall renderable area is quite huge.

For this kind of purpose, we would recommend using multi-segment chart instead.

That GetRenderDeviceInfo doesn't reveal anything. Please call it after chart has rendered at least once, e.g. in double-click event handler.

Hello

Please use set axis.AutoFormatLabels = False, and use axis.FormatValueLabel event handler to show it in the format you prefer.

Can you please send screenshot of your app, so I could instruct you better? Also if you can post a small VS project here to reproduce the issue, that would be nice. Having a few multi-segment charts instead of dozens single-segment chart saves a lot of performance and memory resources. What is your ...

Hi Matus, The size of the point here is the major problem. That size of round point is composed of hundreds of small triangles. Please use Rectangle shape. Also ensure you are running with 7.2 version, with DirectX11 engine. You can check that by using chart.GetRenderDeviceInfo(). Best regards, Pasi

Hi Spitzna, With this info it seems we can't reproduce the problem or track it down. It almost seems that some other thread is manipulating the chart at the same time it's being rendered. Can you check you have used Control.Invoke if you are updating the chart from background thread? Please send us ...

It seems to be a bug we hopefully can get around. For now, please don't use underscore in the beginning.

Hi Greg, how about just setting xAxis.AutoFormatLabels = true? It is best used with xAxis.AutoDivSpacing = true. There's of course several other ways to solve it: - set LabelsNumberFormat accordingly - set FormatValueLabel event handler, define output string there - set CustomAxisTicks where you can...

Dear developers,

we added new features and examples. See document with pictures illustrating new features: http://www.arction.com/public_downloads ... atures.pdf

We hope you like it

Hello, Version 1...7: every developer programming with LightningChart will need an own license. Currently licensing terms allows installing same license in two computers, used by same developer. Version 8->: License has to be activated to a computer. One developer (computer) / license. There is also...

Late this week or next week.

The centering thing will be changed in 7.2. The labels will be left-aligned in this case. It has a total redesign on the labels positioning logic.

Hi Spitzna, Found one similar problem in our support archives... so it happens only on one specific computer? Can you check that there's no RedGate Toolbelt or SmartAssembly tools installed in that PC? If they are, please clear the RedGate's cache. That helped with this case. Also check you are depl...

How about the approach we have presented in Trading, segment splitters example: http://arction.com/images/screenshots/u ... mented.jpg

Hi Greg, you pretty much have figured out how to do it. You may want to try also with chart.BeforeRendering event handler, pretty much like this: void _chart_BeforeRendering(object sender, BeforeRenderingEventArgs e) { GraphSegmentInfo gsi = _chart.ViewXY.GetGraphSegmentInfo(); for (int seg = 0; seg...

To make a very simple WinForms line chart, here is how... Just add empty Form in the application, and apply the following code in it. CreateChart method creates the chart instance, and also creates the series. Chart line style is defined, and also points style. Both line and points are shown in this...

I correct my answer.

Set YAxisPrimary3D.MajorDivStyle.Alignment = Near. Then the ticks and labels shift inside the chart.

Hi Matus,

In 3D, the labels are in outer side only.

How about setting View3D.YAxisPrimary3D.Location = FrontRight? Then the whole axis moves to right side, including the labels.

Currently palette coloring is not available based on X dimension, and therefore X axis palette coloring is not supported either.

When setting margins, subscribe to AfterRendering. In the handler UNSUBSCRIBE from it so it won't be firing every time the chart renders in the future. That way the overhead introduced by this handler doesn't get too high.

So what I wonder is happening is: when i call valuestocoord, it just int taking the most 'up to date' version of the chart, its getting the coordinates based off an old value or something. Correct. LC uses margins rectangle when converting values to coords and coords to value. In this case, the mar...

Hi Greg,

set MouseDown event handler for each series. In the handler, sort ViewXY.SampleDataSeries list so that the clicked series becomes last in the list. Then it'll render topmost.

Hello all, The local clock shift due to daylight saving, is common problem in spring and autumn, every year. Depending on local machine Regional settings, day light saving is enabled or disabled. There's probably as many preferences what should happen when DST kicks as they are users. :? Most common...

Please update to newest 7.1.3.6 version. There has been fixes in the export routines.

chart.Width and Height only apply, if chart.Dock == None. Otherwise width and height are got from parent control.

Hi Matus, please ensure you are running with 7.1.3.6 assemblies. In some older versions LabelsTicksGap didn't apply correctly. I made tests with 7.1.3.6 and I wasn't able to reporoduce the problems your are encountering. The axis titles are not cut, nor axis numeric labels. Automatic margins are bes...

I made this kind of example application, based the description you wanted. Hopefully I got it right :shock: VS project: TrackingClickedSeries.zip CursorTracking.jpg using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq...

Hello, you are not receiving our version release notes? Please send your e-mail address to arction [at] arction.com, and we'll keep you informed in the future. When we released v.7, we new version features letter to all customers signed up for the release notes. It was also shown here: http://forum....

Hi matus,

v.7 allows controlling grid and tick colors individually. You can give specific colors to tick and grid by adding two custom ticks. One tick for the tick (customTick.Style = Tick), and one tick for the grid (customTick.Style = Grid).

LightningChart object model is tree-based. Every class has it's parent object, and list of child objects. With aid of this tree, child object notifies parent of its changes, so that parent can respond to it respectively, and parent notifies its parent chain until reaching the root node, LightningCha...

chart.SaveToFile, SaveToSteam and CopyToClipboardAsEMF support only the following views: - ViewXY - ViewPolar - ViewSmith LightningChart has GDI+ based routines to make exports in 2D views. For 3D, they can't be used, and therefore View3D and ViewPie3D are not supported. For View3D and ViewPie, use ...

Hi, to be able to help you more, I have to ask questions as I did't understand what you are trying to achieve. When clicking one series, you want to - show its value point by point - edit one data point value by dragging one point up / down Or something else? Please include an illustrative picture, ...

Dear developers,

new assembly pack is out, with a bunch of bug fixes.

Enjoy

Thanks for suggesting documentation improvements in this regard. We added new section in the manual: 6.21.17 Excluding specific X or Y axes from zooming and panning operations • To exclude specific X or Y axes from Zooming operations, set axis.ZoomingEnabled = False • To exclude specific X or Y axes...

Hello,

thanks for reporting the problem.

Can you please try if these new assemblies will help with the problem:

www.arction.com/download/v.7.1.3.5_assemblies.zip

We'll then make them available publicly soon.

Hi,

the rendering order of markers is defined by the order of markers in SeriesEventMarkers collection. So, just rearrange the collection respectively. Marker with index 0 renders in back.

Hi,

you can do that by setting
axis.PanningEnabled = False
axis.ZoomingEnabled = False

For all the axes you don't want to respond to zooming and panning gestures. Note these are available not only for Y axes, but X axes as well.

Currently there's not. LegendBox docking to margins in planned to implemented soon.

Hi,

there's somewhat similar discussion here: http://forum.arction.com/viewtopic.php? ... ping#p2403

7.1 version has DX11 renderer as default. Please set chart.RenderOptions.DeviceType = AutoPreferD9.

Does the flickering go away?

If there's a problem in DX11 renderer, we definitely want to fix it, please just teach us how to reproduce the issue.

To prevent negative values, you can define date origin to say year 1900.

The axis range limiting you are using is currently probably the best approach and should be fully working.

mm:ss issue: changed. Available in next update.

Hi! With than memory amount, and using SeriesPoint (size 20 bytes per data point), it's not going to be possible. 8 x 120,000,000 x 20 produces over 18 GB memory footprint. Please use SampleDataSeries, with SampleFormat = SingleFloat, then it uses 4 bytes / data point. Might work with your system, m...

That's difficult question

By using rectangle shape of points, and no points optimization at all, our DirectX11 engine should be able to render lots of large points quite nicely. But not as fast for sure than this small dots. Ensure you are using LC 7.1 or newer.

Yes. Use ViewXY.GetMarginsRect().

Segments info can be read by ViewXY.GetGraphSegmentInfo(), that reveals top and bottom of each segment.

It doesn't seem to be possible currently, without automatic axis placement. By setting ViewXY.AxisLayout.YAxisAutoPlacement = LeftThenRight applies that rule for each segment separately. Setting that to 'Off' and setting each Y axis Position property 0 = left, or 100 = right moves the axis according...

Hi, you can do it pretty much like this, when axis.ValueType = Time. axisX.KeepDivCountOnRangeChange = false; axisX.AutoDivSpacing = false; axisX.MajorDiv = 2 * 3600; axisX.SetRange(now.Hour * 3600, (now.Hour + 12) * 3600); When axis range adjusts, either MajorDivCount or MajorDiv has to adjust. Kee...

Spitzna,

can you please reply if the problem still persists? If it does, please send a small project to reproduce the issue.

There unfortunately is no easy way for us to change the behavior without upsetting a lot of users. Many developers want to hide the axis, but show the data that is bound to that hidden axis. If we hide the vertical space for that axis, data is not shown.

Hi Hendrik,

v.6 and v.7 nuget packs are distinct. So please update your nuget references to use v.7 and make code changes needed between v.6 and v.7.

v.6 nuget packs are not updated anymore. We are continuously updating v.7 nuget packs.

Hi snOOfy, the image viewer example is included in v.7.1 installers. It's available in our downloads. When zooming the view, the annotations or map background show only the image you have set to it. It doesn't load higher resolution images automatically from anywhere. So you may want to set a new im...

Hi Grandmaster Greg! LotsOfPixels uses single-colored texture. Pixels are either ON or OFF. Pixels instead retain correct alpha blending, so when having point color alpha < 255, multiple data points hitting same location will make it render in more strong color. LotsOfPixels is faster when having LO...

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