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Re: IDLgrPlot Axis scaling bug? [message #51651 is a reply to message #51650]

Fri, 01 December 2006 06:44

Laurens
Messages: 41
Registered: May 2006

Member

David Fanning wrote:
> Laurens writes:
>
>> in the above example, i want to follow the cursor with a red cross,
>> visible by lines drawn all over the plot (one horizontal, one vertical).
>> I managed to do this by adding two IDLgrPolyline objects to the model,
>> I've already fetched any movement of the cursor, but somehow - and it
>> makes me think it has to do with that resizing / scaling again - the
>> positions of the lines don't match the position of the cursor :(
>>
>> Screenshot:
>>
>> http://sophorus.mine.nu/IDLgrPolyline.jpg
>>
>> Code:
>>
>> self.xLine = Obj_New('IDLgrPolyline')
>> self.yLine = Obj_New('IDLgrPolyline')
>> self.Model->Add, self.xLine
>> self.Model->Add, self.yLine
>> self.xAxis->GetProperty, CRange=xrange
>> self.yAxis->GetProperty, CRange=yrange
>>
>> xs = Normalize(xrange)
>> ys = Normalize(yrange)
>>
>> self.xLine->SetProperty, XCoord_Conv=xs
>> self.yLine->SetProperty, YCoord_Conv=ys
>
> Isn't this backwards? Don't you want this:
>
> self.xLine->SetProperty, YCoord_Conv=ys
> self.yLine->SetProperty, XCoord_Conv=xs
>
> I'd probably scale both lines in BOTH directions. Why not?
>
> Cheers,
>
> David
>
err, you're right :) working too long without coffee it seems :)

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[Message index]

		Re: IDLgrPlot Axis scaling bug? By: David Fanning on Fri, 01 December 2006 06:54
		Re: IDLgrPlot Axis scaling bug? By: Laurens on Fri, 01 December 2006 06:45
		Re: IDLgrPlot Axis scaling bug? By: Laurens on Fri, 01 December 2006 06:44
		Re: IDLgrPlot Axis scaling bug? By: David Fanning on Fri, 01 December 2006 06:38
		Re: IDLgrPlot Axis scaling bug? By: Laurens on Fri, 01 December 2006 06:33
		Re: IDLgrPlot Axis scaling bug? By: David Fanning on Fri, 01 December 2006 06:32
		Re: IDLgrPlot Axis scaling bug? By: David Fanning on Fri, 01 December 2006 06:25
		Re: IDLgrPlot Axis scaling bug? By: Laurens on Fri, 01 December 2006 06:22

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