How to change Designator text size by script in Altium 17 or newer

Question

For the assembly drawing I have to move all the designators to a prefefined layer, rotate them as needed and set the text size. I know this is possible via "find similar objects" but I would like to do it via a script. I found a Vb script which is able to set the layer and rotation but the VB API does seems to not supporting a change of the text size. CompDes.Name.Height=0.5 does not work. Our default text font is "TrueType".

This VB script will rotate the designators in one of two ways, center them on the component and move it to the desired layer.

Please help me to set the Text size via script. (Conversion of the script to Delphi is also an option)

Sub RotateDesignators
Dim Board
Dim Component
Dim CompDes
Dim I

Set Board = PCBServer.GetCurrentPCBBoard
If Board is Nothing Then Exit Sub

Iterator = Board.BoardIterator_Create

Iterator.AddFilter_ObjectSet(MkSet(eComponentObject))
Iterator.AddFilter_LayerSet(AllLayers)
Iterator.AddFilter_Method(eProcessAll)

Set CompDes = Iterator.FirstPCBObject
PCBServer.PreProcess
I = 0

'Mech Layer 1 Layer Idx = 57
MechL1 = 57
TopDesignator = MechL1 + 12
BotDesignator = MechL1 + 13

While Not (CompDes Is Nothing)

Call PCBServer.SendMessageToRobots(CompDes.Name.I_ObjectAddress, c_Broadcast, PCBM_BeginModify, c_NoEventData)
I = I + 1

    If CompDes.Layer = eTopLayer then           'Component is on the top

       Select Case CompDes.Rotation
           Case 0, 180, 360
                CompDes.Name.Rotation  = 0
           Case 90, 270
                CompDes.Name.Rotation  = 90
       End Select
       CompDes.Name.Layer = TopDesignator

    else                                     'Component is on the bottom

       Select Case CompDes.Rotation
           Case 0, 180, 360
                CompDes.Name.Rotation  = 0
           Case 90, 270
                CompDes.Name.Rotation  = 270
       End Select
       CompDes.Name.Layer = BotDesignator
    End If
    Call PCBServer.SendMessageToRobots(CompDes.Name.I_ObjectAddress, c_Broadcast, PCBM_EndModify , c_NoEventData)

    Call PCBServer.SendMessageToRobots(CompDes.Name.I_ObjectAddress, c_Broadcast, PCBM_BeginModify, c_NoEventData)
    CompDes.ChangeNameAutoposition = eAutoPos_CenterCenter
    Call PCBServer.SendMessageToRobots(CompDes.Name.I_ObjectAddress, c_Broadcast, PCBM_EndModify , c_NoEventData)

       Set CompDes = Iterator.NextPCBObject
Wend

'ShowMessage(I & " were found") 'Uncomment this line if you want a message after it has finished.
Board.BoardIterator_Destroy(Iterator)

Pcbserver.PostProcess
Call AddStringParameter("Action", "Redraw")
RunProcess("PCB:Zoom")
End Sub

Answer 1

See this page for an example: Altium Designer example script

The relevant part is:

OldUseTTFonts := Designator.UseTTFonts;
OldItalic     := Designator.Italic;
OldBold       := Designator.Bold;
OldInverted   := Designator.Inverted;
OldFontName   := Designator.FontName;
OldFontID     := Designator.FontID;
OldRotation   := Designator.Rotation;

to save the current status, the other way round to assign some new settings. You'll neeed to find out if FontId is still relevant (trial and error)

Here is a reference to ADs IPCB_Text object with the associated methods/properties. You'll need to scroll down pretty far or do a search for "IPCB_Text interface".