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Viewport limitation workaround???
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Information générale
Forum:
Visual FoxPro
Catégorie:
Problèmes
Divers
Thread ID:
00857574
Message ID:
00857813
Vues:
24
That's an interesting idea. I wish it were just a simple display issue. The image being displayed is also being edited (cropped, resized, annotated with labels and arrows)... all in VFP with the help of an image-processing DLL. So I need to be able to drag-drop onto the image and also know just where on the image (which may be scrolled H or V) the object was dropped. Do you know if the "viewport" coordinates for a scrolled webbrowser control are accessible? Can it pass drag-drop, mousedown, mouseup, mousemove events back to vfp?


>Mark,
>
>Why not just use a Webbrowser control on a form to display the image?
>
>>I've found that when using scrollbars to display a large object (image) in a viewport, there seem to be some undocumented maximums imposed. For example, the largest image height I can use is about 2400 pixels. Anything on an image taller than that (assuming image TOP=1 on form) is clipped from the bottom of the image with no warnings or error messages.
>>
>>Can somebody fill me in on what the rules are here and what's really going on? I don't think this is the famous (disappearing) scrollbars bug. It seems to be an OS limitation or something.
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