How to set up x axis major/minor values?

[onemorequestion]

I try to manipulate the major interval values for x axis in a line diagram of type Date.

There is no problem changing the y axis major/minor interval.

Code: Select all

oCharts = ThisComponent.getSheets().getByIndex(0).getCharts()
oEmbeddedObject = oCharts.getByIndex(0).getEmbeddedObject()
oDiagram = oEmbeddedObject.getDiagram()
oYAxis = oDiagram.getYAxis()
oYAxis.StepMain = 40.0
oYAxis.StepHelpCount = 3

This doesn't work for x axis!

Trying to use the "TimeInterval" structure say's the property is read-only in the last line below.

Code: Select all

sTimeIntervalMajor = CreateUnoStruct("com.sun.star.chart.TimeInterval")
sTimeIntervalMajor.Number = 4
sTimeIntervalMajor.TimeUnit = 0
sTimeIntervalMinor = CreateUnoStruct("com.sun.star.chart.TimeInterval")
sTimeIntervalMinor.Number = 1
sTimeIntervalMinor.TimeUnit = 0
sTimeIncrement = CreateUnoStruct("com.sun.star.chart.TimeIncrement")
sTimeIncrement.MajorTimeInterval = sTimeIntervalMajor
sTimeIncrement.MinorTimeInterval = sTimeIntervalMinor
sTimeIncrement.TimeResolution = 1

oXAxis = oDiagram.getXAxis()
oXAxis.ExplicitTimeIncrement.MajorTimeInterval = sTimeIntervalMajor
oXAxis.setPropertyValue("ExplicitTimeIncrement", sTimeIncrement)
oXAxis.ExplicitTimeIncrement = sTimeIncrement

Can anyone show a solution how these values can be manipulated? Or confirm that it is not possible?

Thx a lot!

I posted this question first on stackoverflow https://stackoverflow.com/questions/74639398 and have to thank Jim K for helping me with this a lot.

[JeJe]

If you posted a document with a chart and your code it would help people help without having to first make one themselves.

I don't know about charts but often read only properties are ones that have been set at an object's creation and can only be set then.

[FJCC]

Does a Line chart have major and minor intervals? The x axis is not numeric and the tick labels are categories. I think you need an xy scatter plot to have major and minor intervals.

[onemorequestion]

Yes, it does. See the picture below. File attached. Thx.

lo_calc_xaxis_major_tics.png (75.97 KiB) Viewed 1328 times

lo_calc_xaxis_major_tics.ods

(21.64 KiB) Downloaded 87 times

[onemorequestion]

The macro code:

Code: Select all

REM  *****  BASIC  *****

Sub Chart( oEvent as variant )

Dim oSheet As Variant
Dim oCell As Variant
Dim oCharts As Variant
Dim oChart As Variant
Dim oEmbeddedObject As Variant
Dim oDiagram As Variant
Dim oXAxis As Variant
Dim oYAxis As Variant

oSheet = ThisComponent.CurrentController.getActiveSheet()
oCell  = ThisComponent.CurrentSelection
oCharts = oSheet.getCharts()
oChart = oCharts.getByIndex(0)
oEmbeddedObject = oChart.getEmbeddedObject()
oDiagram = oEmbeddedObject.getDiagram()

rem set major/minor interval for y axis
oYAxis = oDiagram.getYAxis()
oYAxis.StepMain = 10.0
oYAxis.StepHelpCount = 2

rem set major/minor interval for x axis ???
rem above code doesn't work, hence the structur try
sTimeIntervalMajor = CreateUnoStruct("com.sun.star.chart.TimeInterval")
sTimeIntervalMajor.Number = 3
sTimeIntervalMajor.TimeUnit = 0
sTimeIntervalMinor = CreateUnoStruct("com.sun.star.chart.TimeInterval")
sTimeIntervalMinor.Number = 3
sTimeIntervalMinor.TimeUnit = 0
sTimeIncrement = CreateUnoStruct("com.sun.star.chart.TimeIncrement")
sTimeIncrement.MajorTimeInterval = sTimeIntervalMajor
sTimeIncrement.MinorTimeInterval = sTimeIntervalMinor
sTimeIncrement.TimeResolution = 1

oXAxis = oDiagram.getXAxis()
oXAxis.ExplicitTimeIncrement.MajorTimeInterval = sTimeIntervalMajor
oXAxis.setPropertyValue("ExplicitTimeIncrement", sTimeIncrement)
oXAxis.ExplicitTimeIncrement = sTimeIncrement
  
End Sub

[Zizi64]

Please install and use one of the excellent Object inspection tools: XrayTool or MRI.

Then you will able to list and examine the existing properties and methods of the programming objects of the API.


API: Application Programming Interface.
https://berma.pagesperso-orange.fr/index2.html
https://extensions.libreoffice.org/en/e ... ction-tool

[karolus]

Hallo
The MRI-version on LO-extensions is outdated, better use this github with mri1.3.4.oxt

[Lupp]

(Spoken aside one very general remark:)

Completely abandon line graphs that are not x-y graphs.

Students are trained - and need to be trained - that the slope of a line in a graph contains relevant information. This is essential (imo) as a basis for teaching the foundations of calculus.

Line diagrams that are not x-y diagrams violate the principles for which x-y diagrams are useful: in science and engineering, but also in many only superficially related fields.


[Checked with www.DeepL.com/Translator (free version)]