Nativescript-ui charts

I'm working on a Nativescript/Angular project where I want to show data coming from IOT devices using different charts. I just got into Nativescript development and did not find all the answers to my questions in the docs, hoping someone here might help. I have looked at some forums and the official docs but did't not succeed yet.

I need a linechart to show values on the Yaxis and the time on the Xaxis. This is where i found my problem. I want the Xaxis to show hours not milliseconds as it looks like it is showing right now. The list that populates the chart is build up of objects witch are structured like this:

{ timestamp: Date; value: number; }

and the output of one object looks like this:

{ "timestamp": "2018-11-12T05:19:13.516Z", "value": 40.20774023858568 }

I did not get the lable rotation to work either so there are absolutely something that I am doing wrong.

<RadCartesianChart class="chart" [ngSwitch]="" tkExampleTitle tkToggleNavButton>

    <DateTimeCategoricalAxis tkCartesianHorizontalAxis dateFormat="dd.MMM H:mm" 

        labelFitMode="Rotate"

        labelRotationAngle="1.3"></DateTimeCategoricalAxis>

    <CategoricalAxis tkCartesianHorizontalAxis dateFormat="hh">/CategoricalAxis>

    <LinearAxis tkCartesianVerticalAxis></LinearAxis>

    <LineSeries tkCartesianSeries 

        [items]="readings"categoryProperty="timestamp" 

        valueProperty="value</LineSeries>

</RadCartesianChart>

asked Nov 12 at 14:06

Johannes Kraft

178

It seems as DateTimeContinuousAxis extends the CategoricalAxis and can therefore replace it completely. I thought that it only handled settings and that you needed to use both. The Hour issue also got fixed byt the DateTimeContinuousAxis, the docs actually say "It can be used if the category of the data points is of type Calendar." Okey, on to bigger and better things!
– Johannes Kraft
Nov 13 at 7:16

add a comment |

{ timestamp: Date; value: number; }

and the output of one object looks like this:

{ "timestamp": "2018-11-12T05:19:13.516Z", "value": 40.20774023858568 }

I did not get the lable rotation to work either so there are absolutely something that I am doing wrong.

<RadCartesianChart class="chart" [ngSwitch]="" tkExampleTitle tkToggleNavButton>

    <DateTimeCategoricalAxis tkCartesianHorizontalAxis dateFormat="dd.MMM H:mm" 

        labelFitMode="Rotate"

        labelRotationAngle="1.3"></DateTimeCategoricalAxis>

    <CategoricalAxis tkCartesianHorizontalAxis dateFormat="hh">/CategoricalAxis>

    <LinearAxis tkCartesianVerticalAxis></LinearAxis>

    <LineSeries tkCartesianSeries 

        [items]="readings"categoryProperty="timestamp" 

        valueProperty="value</LineSeries>

</RadCartesianChart>

asked Nov 12 at 14:06

Johannes Kraft

178

It seems as DateTimeContinuousAxis extends the CategoricalAxis and can therefore replace it completely. I thought that it only handled settings and that you needed to use both. The Hour issue also got fixed byt the DateTimeContinuousAxis, the docs actually say "It can be used if the category of the data points is of type Calendar." Okey, on to bigger and better things!
– Johannes Kraft
Nov 13 at 7:16

add a comment |

{ timestamp: Date; value: number; }

and the output of one object looks like this:

{ "timestamp": "2018-11-12T05:19:13.516Z", "value": 40.20774023858568 }

I did not get the lable rotation to work either so there are absolutely something that I am doing wrong.

<RadCartesianChart class="chart" [ngSwitch]="" tkExampleTitle tkToggleNavButton>

    <DateTimeCategoricalAxis tkCartesianHorizontalAxis dateFormat="dd.MMM H:mm" 

        labelFitMode="Rotate"

        labelRotationAngle="1.3"></DateTimeCategoricalAxis>

    <CategoricalAxis tkCartesianHorizontalAxis dateFormat="hh">/CategoricalAxis>

    <LinearAxis tkCartesianVerticalAxis></LinearAxis>

    <LineSeries tkCartesianSeries 

        [items]="readings"categoryProperty="timestamp" 

        valueProperty="value</LineSeries>

</RadCartesianChart>

asked Nov 12 at 14:06

Johannes Kraft

178

{ timestamp: Date; value: number; }

and the output of one object looks like this:

{ "timestamp": "2018-11-12T05:19:13.516Z", "value": 40.20774023858568 }

I did not get the lable rotation to work either so there are absolutely something that I am doing wrong.

<RadCartesianChart class="chart" [ngSwitch]="" tkExampleTitle tkToggleNavButton>

    <DateTimeCategoricalAxis tkCartesianHorizontalAxis dateFormat="dd.MMM H:mm" 

        labelFitMode="Rotate"

        labelRotationAngle="1.3"></DateTimeCategoricalAxis>

    <CategoricalAxis tkCartesianHorizontalAxis dateFormat="hh">/CategoricalAxis>

    <LinearAxis tkCartesianVerticalAxis></LinearAxis>

    <LineSeries tkCartesianSeries 

        [items]="readings"categoryProperty="timestamp" 

        valueProperty="value</LineSeries>

</RadCartesianChart>

angular2-nativescript nativescript-telerik-ui

asked Nov 12 at 14:06

Johannes Kraft

178

asked Nov 12 at 14:06

Johannes Kraft

178

asked Nov 12 at 14:06

Johannes Kraft

178

asked Nov 12 at 14:06

Johannes Kraft

178

asked Nov 12 at 14:06

Johannes Kraft

178

It seems as DateTimeContinuousAxis extends the CategoricalAxis and can therefore replace it completely. I thought that it only handled settings and that you needed to use both. The Hour issue also got fixed byt the DateTimeContinuousAxis, the docs actually say "It can be used if the category of the data points is of type Calendar." Okey, on to bigger and better things!
– Johannes Kraft
Nov 13 at 7:16

add a comment |

It seems as DateTimeContinuousAxis extends the CategoricalAxis and can therefore replace it completely. I thought that it only handled settings and that you needed to use both. The Hour issue also got fixed byt the DateTimeContinuousAxis, the docs actually say "It can be used if the category of the data points is of type Calendar." Okey, on to bigger and better things!
– Johannes Kraft
Nov 13 at 7:16

It seems as DateTimeContinuousAxis extends the CategoricalAxis and can therefore replace it completely. I thought that it only handled settings and that you needed to use both. The Hour issue also got fixed byt the DateTimeContinuousAxis, the docs actually say "It can be used if the category of the data points is of type Calendar." Okey, on to bigger and better things!
– Johannes Kraft
Nov 13 at 7:16

add a comment |

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