Last Updated: 17 May 2022 11:55 by Martin Ivanov
Currently, the colorizator of the heatmap is choosing a color based on the minimum and maximum values in the entire ItemsSource of the CategoricalDefinition. Add modes that change this behavior so that the color is chosen based on the minimum and maximum in the same row (or column).
Last Updated: 01 Nov 2021 15:11 by ADMIN
Release R3 2021 SP

Labels (instances of the LightTextBlock control) remain on the render surface after the ItemsSource is replaced dynamically and the row or column count is changed. As a workaround, the control can be redrawn manually to clear the surface:

        var temp = heatmapTest.Template;
        heatmapTest.Template = null;
        heatmapTest.Template = temp;

Last Updated: 21 May 2020 14:05 by ADMIN

I'm using a "Custom Heat Map Source" as described here:

Upon initialization, I fill in the color of all the cells with a default color.
Later, as data comes in, I update the color of individual cells.

It seems that the only way to refresh the Definition so that it will display the newly set cell color is to do the following:

HeatMapDefinition.SelectedItems = new Collection<object>();

After that, the Definition updates itself by calling method "CustomHeatMapDefinition::GetColor()" on each and every cell (which of course gets delegated to the "CustomHeatMapSource" implementation.

This could lead to performance problems on large Heat-Maps.

So my request is that there is a feature allowing the updating of individual cell-data and a refresh mechanism that would not query each heat-map cell afterwards, but only the updated cells.

I have discussed this in a support request (https://www.telerik.com/account/support-tickets/view-ticket/1464531) with Dinko and he suggested I request this feature.


Last Updated: 03 Oct 2019 04:40 by ADMIN
Release LIB 2019.3.1007
If you update the property value bound to the Value of the cells at runtime, this change doesn't reflect in the UI. To reproduce this you will need to assign a colorizer to the CategoricalDefinintion and set the colorize's IsAbsolute property to True.

To work this around, reset the Definition property of RadHeatMap after the values change.
var definition = this.heatMap.Definition;
this.heatMap.Definition = null;
this.heatMap.Definition = definition;
Last Updated: 24 Sep 2019 06:56 by ADMIN
Release LIB 2019.3.923
Last Updated: 11 Oct 2018 11:44 by ADMIN
Created by: Martin Ivanov
Comments: 1
Category: HeatMap
Type: Feature Request

Last Updated: 30 Jul 2018 06:14 by ADMIN
Last Updated: 03 Jan 2017 21:01 by Luke
Created by: Luke
Comments: 0
Category: HeatMap
Type: Feature Request
With the heatmap, it would be a useful option to be able to distinguish the order that columns and rows are presented.  Currently it is one or the other, and seemingly only as per the row or column field is encountered during the rendering of the heatmap
Last Updated: 08 Aug 2016 13:41 by ADMIN
Last Updated: 12 Mar 2016 12:25 by ADMIN
The labels are not positioned correctly when some of the cells are empty.

Available in LIB version: 2016.1.314
Last Updated: 29 Feb 2016 14:54 by ADMIN