Hand style movement inside a NSScrollView
Hand style movement inside a NSScrollView
- Subject: Hand style movement inside a NSScrollView
- From: Steve Sheets <email@hidden>
- Date: Fri, 18 Apr 2008 15:49:10 -0400
Does someone have any suggestions or hints about how to do this?
I am using NSScrollView to display some graphical data. The Scroll
View displays a section of my custom view which displays the
graphics. The user can drag the horizontal and vertical scrollers to
change the visible position inside the graphics. It function the way
you would expect any graphic program to work.
Depending on the current selected too, when the user clicks in the
scroll view on my custom view and drags, if the drag goes outside the
view area, the scrolled automatically scrolls to show more area. I
called setScrollsDynamically:TRUE for my scroll view, and the object
handles this automatically (Thank you Apple). Again, it is what you
expect from a well behaved draw program.
However, I also want to implement a "Hand" style tool. One that allows
the user to simple click inside the Scroll View and draw the graphics
around. This function is different then the scrollsDynamically flag
(which auto scrolls if you go outside the view display rectangle).
Does anyone have any suggestions on how to implement? Or better yet,
some examples? I would have thought this call would be implemented by
the NSScrollView object (it is more difficult then
scrollsDynamically), but I can not find any suggestions on how to do it.
Thank you,
Steve Sheets
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