Libre Office Macro to crop image - libreoffice

Question

I have a Libre Office Macro and I need to crop an image, but I have been unable to find any helpful documentation or an example. Anyone have a tip how to do it?
dim noArgs()
dim emptyDocComponent as object
dim document as object
dim dispatcher as object
emptyDocComponent = StarDesktop.LoadComponentFromUrl("private:factory/swriter", "_blank", 0, noArgs())
frame = ThisComponent.CurrentController.Frame
dispatcher = createUnoService("com.sun.star.frame.DispatchHelper")
dim args1(3) as new com.sun.star.beans.PropertyValue
args1(0).Name = "FileName"
args1(0).Value = "file://" & inputPath
args1(1).Name = "FilterName"
args1(1).Value = "<All formats>"
args1(2).Name = "AsLink"
args1(2).Value = false
args1(3).Name = "Style"
args1(3).Value = "Graphics"
dispatcher.executeDispatch(frame, ".uno:InsertGraphic", "", 0, args1())
selection = ThisComponent.CurrentSelection
If selection.ImplementationName <> "SwXTextGraphicObject" Then
Exit Sub
End If
' this is what the macro recorder captured, but it was "rem" and non-functional
rem dispatcher.executeDispatch(document, ".uno:Crop", "", 0, Array())
*** edit
Here is what I am now using in case it helps someone else. I had a picture with a known size in pixels that needed to be cropped. Not entirely sure the calculation is completely accurate, but it is working so far.
dim noArgs()
dim emptyDocComponent as object
dim document as object
dim dispatcher as object
emptyDocComponent = StarDesktop.LoadComponentFromUrl("private:factory/swriter", "_blank", 0, noArgs())
frame = ThisComponent.CurrentController.Frame
dispatcher = createUnoService("com.sun.star.frame.DispatchHelper")
dim args1(3) as new com.sun.star.beans.PropertyValue
args1(0).Name = "FileName"
args1(0).Value = "file://" & inputPath
args1(1).Name = "FilterName"
args1(1).Value = "<All formats>"
args1(2).Name = "AsLink"
args1(2).Value = false
args1(3).Name = "Style"
args1(3).Value = "Graphics"
dispatcher.executeDispatch(frame, ".uno:InsertGraphic", "", 0, args1())
selection = ThisComponent.CurrentSelection
If selection.ImplementationName <> "SwXTextGraphicObject" Then
Exit Sub
End If
' size = (pixels / pixelsPerInch) * mm/in * scaling * actual graphic / displayed graphic
imageWidth = (int(pixelWidth) / int(xPixelsPerInch)) * 25.4 * 110 * (selection.actualSize.Width / selection.Width)
imageHeight = (int(pixelHeight) / int(yPixelsPerInch)) * 25.4 * 110 * (selection.actualSize.Height / selection.Height)
GraphicCrop = selection.GraphicCrop
GraphicCrop.Top = selection.actualSize.Height - imageHeight
GraphicCrop.Bottom = 0
GraphicCrop.Left = 0
GraphicCrop.Right = selection.actualSize.Width - imageWidth
selection.GraphicCrop = GraphicCrop

Answer 1

TextGraphicObject has a struct called GraphicCrop.
The following code was adapted from https://forum.openoffice.org/en/forum/viewtopic.php?f=25&t=72496.
selection = ThisComponent.CurrentSelection
If selection.ImplementationName <> "SwXTextGraphicObject" Then
Exit Sub
End If
pxPerInch = 100*25.6
cropFig = selection.GraphicCrop
cropFig.Left = 0.27*pxPerInch
cropFig.Right = 1.34*pxPerInch
cropFig.Top = 0.31*pxPerInch
cropFig.Bottom = 0.18*pxPerInch
selection.GraphicCrop = cropFig

Answer 2

Search the net for "DannyB" (in combination with OpenOffice) to find his very useful libraries on StarBasic macros for the Drawcomponent.
I'm pretty sure he has an example.
Other resource to look into: Andrew Pitonyak's "OpenOffice Macros Explained", might have an example as well.