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Virtuoso graphical window - get absolute scale

caver456

What's the best way to determine the absolute scale (in the same definition as hiZoomAbsoluteScale) of an existing window?  I'd like to set one window to have the same absolute scale as another window - even if the windows are different sizes / aspect raios.

  • in reply to caver456

    I'm not sure that's really doable. You'd need to know the number of pixels on the canvas itself together with the hiGetViewBBox - and then use that to compute the equivalent zoom area in the other window using the canvas size of that window. You can find the screen coordinates (in pixels) of the entire window, but that includes the toolbars, assistants and so on, but not sure there's a way of finding the canvas area in pixels.

    Andrew.

  • in reply to Andrew Beckett

    I'll probably just go with the entire window size, figuring/hoping that it's "close enough", and see how that goes.  Regardless, thanks for your quick help.

  • in reply to caver456

    I'm not sure of your requirement. But registering and unregistering the zoom pan proc are not problematic and I was able to sync two windows. The implementation was quite simple; Get the window coordinates that come from the callback and apply to the target window.

    With ICADV20 version, I see only zoom events are getting triggered by hiRegZoomPanProc(). In previous versions, any layer visibility change was triggering the callback. I have not checked through the documentation for this behaviour

    -Ramakrishnan

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