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CImageView:GetZoom
The GetZoom method returns the image magnification, or "zoom" factor in the CImageView window.
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nZoom = CImageView:GetZoom() |
nZoom is an integer
zoom number. See Remarks, below.
Mira displays images with the following zoom factors: 1/16, 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16. This is encoded as the integer zoom numbers -16, -8, -4, -2, 1, 2, 4 , 8, and 16. The value ofnZoom must be one of these integer numbers.
Suppose a CImageI is displayed in a CImageView objectV. The following script fragment retrieves the zoom factor and redisplays the image at twice the current zoom.
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nZoom = V:GetZoom() |
-- retrieve the current zoom factor |
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if ( nZoom == -2 ) then |
-- bump zoom=-2 up to zoom=1 |
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nZoom = 1 |
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elseif ( nZoom < 0 ) then |
-- for example: turn -4 into -2 |
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nZoom = nZoom / 2 |
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else |
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nZoom = nZoom * 2 |
-- for example: turn 2 into 4 |
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end |
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V:SetZoom( nZoom ) |
-- redisplay with 2x the previous zoom. |