I’m using the CanvasScrolling example that is supplied with 2016R3 . I’m using Win7. I’ve implemented the code from the example into my code and it works fine except for a couple of issues/gripes.
The scrolling using the mouse wheel is veeerrrry slow, also scrolling using the up/down arrow keys and the scroll bar, are all way too slow. What does work as expected is the scrollbar “thumb” thingy, and the mouse drag up/down works great.
I double checked and ran the supplied example, and it’s the same - so no problem with my code. The example is under Graphics and Multimedia/CanvasScrolling
All I could figure out to adjust was kScrollUnit (I’ve removed the horizontal scrollbar because I don’t need it):
Const kUpArrow = 30
Const kDownArrow = 31
Const kScrollUnit = 8 // pixels to scroll per keypress
// Move the scrollbar based on the key that was pressed
Select Case Asc(Key)
VerticalScrollBar.Value = VerticalScrollBar.Value - kScrollUnit
VerticalScrollBar.Value = VerticalScrollBar.Value + kScrollUnit
Adjusting kScrollUnit from 8 to any other random number makes no difference whatsoever, in my code, or the example.
Interesting. It’s not a big issue but preferable if it worked as per the usual - ie. what you see in this forum is the mouse wheel moves the window contents as expected. I have noticed in Xojo’s own IDE that the mouse wheel moves much more, but seems to be “stepped”?
In any case, MouseWheel, Scrollbar (select) and key dow/up and almost not worth being there. Waay toooo slowww. Perhaps it’s an OS settings issue?
Your thoughts much appreciated.