Add mechanism for getting the layout slot of the axis
Ability to specify a cursor during a drag-to-pan operation. One way to work-around this is to use the attached property in the sample project attached here. This is the code needed to start using the solution: <telerik:RadCartesianChart local:ChartUtilities.PanCursor="Hand" />
Hi, I worked with a lot of chart components for Wpf. I think Telerik offer the best charts architecture that allow to obtain great results in every scenario. After years of use, I think is possible to improve more the global architecture. 1) Series Dataset Charts now works with Points. I think that a better solution require a more abstract structure as a virtual "Dataset". A dataset reuire a type [conform to X axis], tipically X can be a double, a datetime, a label. Dataset return info about poits, tipically: - Min X - Max X Dataset return a DataContext that allow to draw chart: - GetCloserX to an X value [Trackball/Lables...] - GetPoints from/to [Pan/Zoom] This approach is really more efficent and powerfull. In example you can simply define a Dataset as a Formula: Dataset "CosX" based on doubles. MinX=-inf Maxx=+inf GetDataContext from/to -> Return allways 100 points x, cos(x). So you can obtain: - Ultraefficient series using GetDataContext algorithms for specific cases, in example, ordered data. - Trend lines using "Formula" series 2) Only one series, with subtypes. It is really annoying change series type. I think a chart must contains a series and this series can show Line, Area, Split Line, Markers, Columns... To write a good "option panel" that allow user to set Line Thickness, Line Split or standard, Area opacity, Area Color, Marker Type, Marker Colors, Columns Borders... require today a giant work and elaborate code that add and remove serie, reassign points, set z-index, remove and add series in legend... with an incredible useless works in points. 3) More accurate axes definition. Now Chart and Series expose Horizontal and Vertical Axis property. I think this is terrible properties :-). "Horizontal" and "Vertical" is depending chart orientation. Furthermore now, first X/Y axis must be set in chart, others in series. Moving series from an axis to another is really annoying: if new axis is first you must set is null else you must set it... I think Chart must expose XAxesCollection and YAxesCollection. This collections must contains all X and Y axes. Series [and annotation and every object that uses axes] must expose XAxis and YAxis as the Axis object or Axis index. 4) Chart orientation Today a simple chart rotation require a lot of code. The developer must be invert Horizontal and vertical axes, change axes in series and annotations, zoom/pan stop to work... When this is combined with point 2) problems the result is an nightmare. I understand this require a big work and a lot of compatibility problems [Telerik already exposes two charts versions, three is probably a little bit confused]. But if Telerik obtains this features I think it become the most unattainable charts component producer of the world. Decline reason: Most suggestions were tried in the old RadChart and they weren't working very well.
The trackball becomes unresponsive in a live data scenario with more than one chart. The issue is observed in a scenario with a categorical axis and grid lines originating from it. The fix is available in LIB Version: 2016.2.829.
When thousands of items are displayed, the tooltip and trackball behaviors may become slow, because of inefficient searching for the closest datapoints. Performance can be sped up by implementing a custom search and manually creating a ChartDataContext via the GetDataContext method.
In a multiple series scenario if one series gets removed, an internal axis flag is incorrectly reset resulting in the horizontal axis displaying only one label when SmartLabelsMode is used. One way to work-around this is to add an empty dummy series after removing a real series: this.chart1.Series.Remove(EmptyDummySeries); if (this.chart1.Series.Count > 0) { this.chart1.Series.RemoveAt(this.chart1.Series.Count - 1); if (this.chart1.Series.Count > 0) { this.chart1.Series.Add(EmptyDummySeries); } }
I would like to be able to create a histogram where both the x and y axis are linear series and where I can specify the start and end position of each bin (not just one). Previously described workarounds include using StepLineSeries and bar series which cannot have two linear series. I cannot use a scatter plot series as they do not provide the step-wise look of the histogram. Please add this support!
Fix available in LIB Version 2016.2.606.
Add auto-range ability for the numeric axes that adjusts its range in accordance to the visible/zoomed data to show the data more clearly
If the annotation and its label are out of the viewport (the plot area) and then use the PanZoomBar to scroll to it, the label is not displayed. It appears after the chart layout is updated (ex: resize or zoom).
The SelectStyle() method of the DefaultVisualStyleSelector is never called Will be available in R2 2016 Release.
Depending on the zoom level and height of chart, sometimes the first (bottom) label of the chart is not rendered when the vertical axis is a categorical one and the plot mode is BetweenTicks or OnTicksPadded.
When you try to set the LabelDefinition property in style it is not applied. As a workaround you can create an attached property to which you can apply the custom definition and set it to the LabelDefinition property of the annotation in its OnPropertyChangedCallback.
MovingAverageIndicator doesn't recalculate its data points when a new item is added in its ItemsSource at runtime Workaround: To update the data points of the indicator reset its Period property when a new item is added in the ItemsSource. For example: // add new item var indicator = chart.Indicators[0] as MovingAverageIndicator; var period = indicator.Period; indicator.Period = 0; indicator.Period = period;
Add support for 3D Series Type in RadChartView. A RadCartesianChart3D was introduced with R3 2016. You can use its BarSeries3D to easily achieve the Manhattan chart visualization. See the documentation: http://docs.telerik.com/devtools/wpf/controls/radchartview3d/overview See the SDK examples: https://github.com/telerik/xaml-sdk/tree/master/ChartView3D/WPF See the demos: https://demos.telerik.com/wpf/
Available in LIB version: 2016.1.21
If you change the axes of a series at runtime in the following order the axis won't be rendered as expected. 1. Set the series' VerticalAxis property to a new axis instance 2. Set the series' VerticalAxis property to another new axis instance 3. Set the series' VerticalAxis property to the axis' instance created in step 1 This is observed in a scenario with two chart series and only the axis of one of the series is drawn incorrect. When step 3 is performed, the axis is drawn at incorrect position. Then if you resize, the axis will be repositioned but without any ticks or labels. Available in LIB Version 2015.3.1123.