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Sparkline vs. Chart

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Sparkline
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OMER
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OMER asked on 01 Apr 2014, 11:10 AM

I've been trying to use chart and sparkline.

I have a few questions:
1) I've read in the forum that there should be no difference between the two except visual differences (http://www.telerik.com/forums/sparkline-vs-chart-efficiency-).
This doesn't seem to be the case: http://plnkr.co/edit/12gvS94rPTrR7t35wCCH?p=preview
I've created a chart (http://plnkr.co/edit/12gvS94rPTrR7t35wCCH?p=preview) and then a sparkLine (http://plnkr.co/edit/6LRb16QIgUuoWAbxLuyq?p=preview) with the same configuration (same datasource and same options file) and it gives an error when creating the sparkline but not when creating the chart.
2) How can I get the "sparkLine" effect in a "chart", or if it's easier, how to make the "sparkLine" look as good as a chart?
3) I've read these posts:
http://www.telerik.com/forums/get-chart-coordinates-for-mouse-position
http://www.telerik.com/forums/mouse-position---data---position-are-not-the-same-values
They show how to get mouse position in Silverlight and WPF.
How can I get the mouse coordinates using javascript/jQuery? 

Thanks

 

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OMER
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answered on 01 Apr 2014, 12:02 PM
A note about number 3: I know how to track mouse position.  What I need is the function that converts the mouse location to the x and y values in the chart. Also, if there's a "vice versa" method (get mouse location by x and y values) that would be very helpful.
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T. Tsonev
Telerik team
answered on 02 Apr 2014, 04:05 PM
Hello,

The Sparkline and the Chart indeed share identical implementation. The differences are mostly contained to default values for various options.
The reason that you don't see the sparkline in your sample is that you have a title. It moves the series out of the view. If you remove the title and the legend you'll get:
http://plnkr.co/edit/OPLrC9FEFDQ2QRj3Mulz?p=preview

I don't quite understand the second question. A visual mock-up or more details will be greatly appreciated.

There's no method that will map screen coordinates to chart coordinates. This is something that we're looking to address in future releases.
Please, feel free to cast your vote for this feature on our feedback portal.

Regards,
T. Tsonev
Telerik
 

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

 
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OMER
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answered on 03 Apr 2014, 10:27 AM
Hi,
Thanks.
About 1 and 2:
Please take a look at the sparkLine example.  It looks very differently than the chart example.
Where do the differences stem from?
About the 3 issue:
In the links I've given here, these functions are mentioned by a Telerik representative.  How can they not exist?
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T. Tsonev
Telerik team
answered on 04 Apr 2014, 12:33 PM
Hello,

The sparkline is designed to be fitted inside other content, typically text. To achieve this goal it is rendered as an inline-block element (span).
It also hides everything, but the actual series. It also provides root-level data and type options to allow easier initialization with a single series.
 
Because the sparkline is technically inheriting the chart, you can enable any chart option. Many of these options will make it unusable in its typical use case - for inline content.
To be more precise, these are the options overridden by the sparkline:
        options: {
            chartArea: {
                margin: 2
            },
            axisDefaults: {
                visible: false,
                majorGridLines: {
                    visible: false
                },
                valueAxis: {
                    narrowRange: true
                }
            },
            seriesDefaults: {
                type: "line",
                area: {
                    line: {
                        width: 0.5
                    }
                },
                bar: {
                    stack: true
                },
                padding: 2,
                width: 0.5,
                overlay: {
                    gradient: null
                },
                highlight: {
                    visible: false
                },
                border: {
                    width: 0
                },
                markers: {
                    size: 2,
                    visible: false
                }
            },
            tooltip: {
                visible: true,
                shared: true
            },
            categoryAxis: {
                crosshair: {
                    visible: true,
                    tooltip: {
                        visible: false
                    }
                }
            },
            legend: {
                visible: false
            },
            transitions: false,
            pointWidth: 5
        }

 
The forum threads refer to the Silverlight/WPF charts which do not share the same codebase as our Kendo UI offerings.

Regards,
T. Tsonev
Telerik
 

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OMER
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answered on 09 Apr 2014, 10:48 AM
It's much clearer now. Could be useful to put these things in the documentation and maybe add the "missing" functions that exist in the Silverlight/WPF to the "regular" JS kendo.
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T. Tsonev
Telerik team
answered on 10 Apr 2014, 09:01 AM
Hi,

Please, submit any requests for missing features to our feedback portal.

We'll update the Sparkline - Overview help topic to highlight the differences with the Chart.

Regards,
T. Tsonev
Telerik
 

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

 
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