| kandc |
Posted - Dec 01 2014 : 12:38:46
Hi,
I have an ImageEnMView and ImageEnVect working together on one form to perform editing on multipage Tiff files. Essentially, the user opens the file, has the ability to edit one or more pages, adding annotations, before saving the entire tiff back to disk. The ImageEnMView is used for thumbnails and selecting the page, while the ImageEnVect is used to perform annotations.
Because ImageEnMView does not support displaying of annotations, I have had to create two ImageEnMViews, one for display only (call it MDisplay) and the other is a working copy (call it MWorking - nonvisual). Basically, as annotations are made, they are saved back to MWorking as annotations and they are burned to MDisplay so that the annotations will appear on screen. Since MWorking has the official copy of the multipage Tiff, I can still work with the objects. If the page is changed, the current annotations are saved to MWorking and they are burned to MDisplay. When the new page is loaded into Vect, it is loaded from MWorking with the annotations. Visually, this has the effect of displaying annotations on thumbnails.
Problem: My MView does not have a parent, it is created solely for working purposes and I receive random, "control has no parent." The problem goes away if a parent is established. Seems like a bug.
Question: Is there a better way of working with a multipage tiff than using a background copy of MView?
Suggestion: Provide an option in MView that simulates the burning of annotations onto the bitmap for display purposes only so that a separate working copy does not have to be maintained. Others have requested annotations be viewable on MView, this might be a way around the problem?
Thanks,
Kevin
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