https://bugs.kde.org/show_bug.cgi?id=467182
jacob ham <jacobryan...@gmail.com> changed:
What |Removed |Added
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CC| |jacobryan...@gmail.com
--- Comment #1 from jacob ham <jacobryan...@gmail.com> ---
This phenomenon happens because of an unfortunate reaction between the zoom
desktop effect and the way that multimonitor is implemented. Plasma is not the
only desktop to have it; I noticed the same thing on Windows (7 and 10, though
I imagine it still exists today) as well. When displays have a vertical
physical offset Kwin renders black boxes corresponding to those offsets to make
the whole frame a rectangle. These boxes also define the bounds for where the
mouse can move the zoomed frame, because they lay beyond what would normally be
usable screen space it would not normally make sense to allow the mouse or
windows to move into these unseen spaces. Because the mouse can't move into the
boxes and the Zoom effect scales the whole frame, trying to the displayed zoom
region up to the lower monitor's top does suggest seemingly inaccessible areas.
It is actually possible to access that screen portion, however:
1. Move the cursor to the uppermost offset screen region and push the zoom area
to the top of the screen.
2. Move the cursor back down (without moving the zoomed region) and push the
region back towards the lower display.
3. Eventually, when you cross the virtual screen boundary that corresponds to
the where the displays meet horizontally in the frame you'll see a black box
occupy the topmost portion of your lower display. Below the box is the top of
your lower screen, and you can push the zoom frame over the area you couldn't
see before.
Alternatively, switching to proportional or centered mouse tracking lets you
see all areas of the frame like you describe iun the expected behaviour section
without doing the annoying maneuver outlined above.
Writing the above made me wonder why us blind users don't have a window manager
that just creates an infinite plane that we can push around the viewport of,
since zoom and magnification challenges the notion of physical display
boundaries.
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