| IDLgrWindow zoomIn bug? [message #59697] |
Mon, 07 April 2008 04:03  |
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Erik[1]
Messages: 23
Registered: December 2006
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Junior Member |
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Hi Folks,
I have a problem using the ZoomIn function from the IDLgrWindow object
in IDL 6.3. According to the IDL help file I expected the following to
happen:
---
The IDLgrWindow::ZoomIn procedure method causes the current zoom
factor for this window to be increased (that is, multiplied by the
factor given by the window's ZOOM_BASE property). The current zoom
factor, the virtual canvas dimensions, and the location of the visible
portion of the window are updated to reflect the new zoom factor.
---
I already wrote some code to do the job for me, but what it doesn't do
is update the Roi's in the zoomed area. I thought this function could
help me out, but unfortunately I got some strange results. I use the
following code to zoom at a mouseclick (self.View is added to
self.Window);
self.Window->setProperty, ZOOM_BASE=2.0
self.Window->zoomIn
self.Window->Draw, self.View
self.Window->getProperty, Current_Zoom=cz, ZOOM_NSTEP=nstep
print, nstep
print, cz
What happens is that nstep and cz are updated as expected. On the
first zoom, the coordinates of the drawwidget suddenly changes to 0,0
so the drawwidget moves on my widget to the upper left corner... When
I click once more, the drawwidget jumps back to it's original position
again, and luckily stays there. Very strange... But even worse; there
is absolutely no zoom effect to be found in the drawwidget!
Given the fact this function is introduced in IDL 6.1 I expected it to
be functional in 6.3 (or is this too optimistical? ;-) ). Anyway I
would love to hear that this is my fault and not a bug, because this
function will be very useful!
Regards,
Erik
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