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Hi,
I'm using a picture box/image box combination with vertical and horizontal scroll bars for opening and scrolling through a bitmap. I use the picture box and a mousedown event for digitizing coordinates. Problems are coming up when I want to zoom into a bitmap. The scrollbars have a limitted size and when the bitmap becomes too wide/height, I can't scroll any further. Any suggestions for zooming in/out and keeping the internal coordinate system for a mousedown event ??
Harry
I think you would need to change the max or min value on the scrollbars according to your zoom factor, but I really don't know how you programmed it so I can't know.
keeping the system could be archieved by getting the offset (scrollbar.value) multiplying this value with the zoomfactor (or not depending on how you managed that before) + the x or y value you get from the mouse down event and depending on what you really want to archieve taking this times the zoomfactor too.
hope that was any clear
Just show the visible surface of the zoomed image instead of the whole zoomed image, you will also save a lot of memory resources!
I have the same proble but i don't know how can i make zoom to a zone of the picture loaded in a picturebox control. Haw can i do that, please?
Quote:
Originally posted by /\/\isanThr0p
I think you would need to change the max or min value on the scrollbars according to your zoom factor, but I really don't know how you programmed it so I can't know.
keeping the system could be archieved by getting the offset (scrollbar.value) multiplying this value with the zoomfactor (or not depending on how you managed that before) + the x or y value you get from the mouse down event and depending on what you really want to archieve taking this times the zoomfactor too.
hope that was any clear
hm I am sorry, but I don't understand your question.
Simple: using PaintPicture or BitBlt/StretchBlt