Compilation Error -Setting Popupmenu Value

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Thu, 03/04/2021 - 10:28 am

Hi,

 

Working on simple interface that filters a directory list of images bu key words in the filename.  But getting a compilation error that I don't quite get.

This button controls the key word filter. The error is when I try to set the filtered list to another popup menu where the user can pick the individual image. The compiler is flagging an error saying that Imagelist is not a string or string function.  But I have declared it as string.



Function PopUpStepSelction(pa) : PopupMenuControl
	STRUCT WMPopupAction &pa

	switch( pa.eventCode )
		case 2: // mouse up
			Variable popNum = pa.popNum
			String popStr = pa.popStr
			String ImageList
			ImageList = IndexedFile(DataFolder, -1, ".tif")
			variable index,maxindex
			Maxindex=itemsInList(ImageList)-1
			
			For(index =maxindex;index>0;index-=1)
				if(stringmatch(stringFromList(index,ImageList), ("*"+popStr+"*"))==0)
					imagelist = removeListItem(index,ImageList)
				endif
			endfor
			PopUpMenu ImagePick value=ImageList //this is where error is identified
			break
		case -1: // control being killed
			break
	endswitch

	return 0
End

So what completely obvious am I missing?

Andy

Hi,

Simplifying the issue:

 

This compiles:

Function PopUpStepSelction(pa) : PopupMenuControl
	STRUCT WMPopupAction &pa

	switch( pa.eventCode )
		case 2: // mouse up
			Variable popNum = pa.popNum
			String popStr = pa.popStr
			String ImageList
			ImageList = IndexedFile(DataFolder, -1, ".tif")			
//			PopUpMenu ImagePick value=imageList
			PopUpMenu ImagePick value=IndexedFile(DataFolder, -1, ".tif")	
			break
		case -1: // control being killed
			break
	endswitch

	return 0
End

This does not and the only difference is that I assign the result of the indexedfile function to an intermediate string variable.

Function PopUpStepSelction(pa) : PopupMenuControl
	STRUCT WMPopupAction &pa

	switch( pa.eventCode )
		case 2: // mouse up
			Variable popNum = pa.popNum
			String popStr = pa.popStr
			String ImageList
			ImageList = IndexedFile(DataFolder, -1, ".tif")			
			PopUpMenu ImagePick value=imageList
//			PopUpMenu ImagePick value=IndexedFile(DataFolder, -1, ".tif")	
			break
		case -1: // control being killed
			break
	endswitch

	return 0
End

I am officially confused.

Andy

March 4, 2021 at 10:52 am - Permalink

The help for PopUpMenu shows many scenarios for setting the PopUpMenu value, and the version that compiles is the recommended one in your situation.

If you need to use a local string variable as the value, the syntax is rather convoluted (for historical reasons):

String ImageList = "\""+IndexedFile(DataFolder, -1, ".tif")+"\""       
PopUpMenu ImagePick value=#ImageList

March 4, 2021 at 12:51 pm - Permalink

Hi Jim,

Thank you for quick reply and while I won't go as far as to say I understand, I am back in business which is the important thing.

Andy

March 4, 2021 at 01:04 pm - Permalink