DocView settings for a plugin

Question

Hi all,
I am writing a plug-in for Acrobat and eventually Reader 9.0 which will send the current page zoom setting, page size and maybe zoomed area size to my application for printing.
I am having trouble getting the raw data above for the page currently in the display.
For an average 8.5 x 11 PDF document, I can find the following
The crop box coordinates of the page.
left == 0
right == 51621336
top == 40045104
bottom == 0
the units are unknown, although this data appears to represent the size of the original page because it does not vary based on zoom or viewable area in the display.
I can also display the zoom number, and the top left x & y coordinates of the viewed page.
Typical output looks like
view datum are viewZoom 51652 viewX -30 viewY -4
left 0 right 51621336 top 40045104 bottom 0
for an 8 1/2 x 11 document opened at 78.8% zoom in full view in the window.
I understand the zoom number, however the units for the crop box don't match those for the viewX & viewY (top left corner)
How can I get the zoom number, the page size (in units X) and the top left corner of the zoomed area (in units X)
I could also substitute the zoomed area size for the top left corner coordinates as long as the units are the same.
Thanks for any input,
Jesse

Answer 1

Thanks Leonard! I really appreciate your input.
I use a callback ASPageViewDidChange to know when the page view has changed (including zoom setting change)
I am using AVDocViewGetDef to get the AVDocViewDef structure after the event.
In the structure, I am looking at
ASFixed pageViewZoom
AVDevCoord pageViewX
AVDevCoord pageViewY
AVScreenRect windowFrame
AVScreenRect is AVRect
AVRect is
AVSDKDependentInteger left
AVSDKDependentInteger top
AVSDKDependentInteger right
AVSDKDependentInteger bottom
AVSDKDependentInteger is ASInt32 and thats a long int.
51652 for pageViewZoom represents 78.8% zoom based on the formula:
1% zoom == 655.36 -> 51652 / 655.36 = 78.85. I use this number in my application to understand the zoom area size compared to the original page size (adjusting/compensating for aspect ratio in arbritrarily shaped windows)
Bottom line, I am not really concerned about this number.
pageViewX and pageViewY also make sense, I got -30 and -4 because the page view had a slight amount of blank space in the display when the image did not fill the display space. If I zoom to 85% the number increases to positive numbers. I would prefer coordinates of the top left corner of the zoomed image rather than the display corner. Actually, I would prefer the corners or sides of the entire zoom area in the display but not sure I can get that.
What I don't understand is the units of the cropBox or mediaBox.
They appear to be long int but their values are extremely large.
Although, If you divide them, they appear to indicate an aspect ratio equal to 8.5 / 11.
8.5 / 11 = .772727~
40045104 / 51621336 = .7757
What would these units be and how do they compare with the viewX and viewY coordinates?
I don't find an API to convert coordinates but I am also confused about which type I am getting from the viewDef.
We have an existing license for Adobe Reader 7. We are looking at upgrading to Adobe Reader 9 and Acrobat 9. I'll change code so I'll need to get a new key for Reader and an Adobe 9 SDK plus Acrobat seats. My manager and software deployment personnel will be handling this.
I am testing on Acrobat 9. So far everything looks good and I am impressed with the 3D stuff which we need.
This is really the sum total of my new code, I just need the information I outlined to complete the whole project. Our existing plugin code will be used along with the changes I have described.
Thanks,
Jesse Perry