Because of our port of css animation and css transition to
progress tracker, we should not think of animated styles as
immutable objects that can map any timestamp to css values.
Rather, timestamps can correspond to different values depending
on the value of GTK_SLOWDOWN over the course of the animation.
To keep animated styles and style animations totally immutable,
we will not share styleanimations between animatedstyles, and
make a new copy of a styleanimation for each timestamp.
Not the ideal solution for this problem, but in practice leads to
much better performance on lower end hardware.
Stack does a double draw on the first frame of its animation, of
both the old contents (into a cairo surface) and the new contents.
Homogeneous stacks only need to reallocate contents on the first
frame.
On lower powered hardware where our frames will be a good deal
slower than the refresh rate anyway, we can assure a smother
experience by waiting a frame to start tweening where frame duration
will be more consistent.
glade-previewer places a gtkwindow inside another toplevel gtkwindow,
updating the shadow width for the client induces a busy loop where the
parent will grow continuously until it crashes gnome-shell/mutter.
To avoid the loop, do not update the shadow width if not dealing with a
toplevel window.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=761651
On wayland, such axes are per-tool, we must update device capabilities
on the fly as new tools enter proximity, first the slave device so
it matches the current tool, and then the master device so it looks
the same than the current slave device.
Only the management of tablets and tools is added so far. No tablet events
are yet interpreted.
As it's been the tradition in GTK+, erasers are split into their own device,
whereas the rest of the tools are meant to be routed through the
GDK_SOURCE_PEN device. Both pen/eraser devices are slaves to a master
pointer device, separate to wl_pointer's. This is so each tablet can
maintain its own cursor/positioning accounting.
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
This will enable multiple "pointers" to have separate data here.
Will come out useful when adding support for tablets, as they
will have a separate cursor for all purposes.
On wayland we get separate master/slaves for each tablet, we will
need to receive crossing events for each master pointer if there's
more than one around.
Axis labels are very X specific, and are not really possible to port to other
backends such as Wayland. As such, it makes more sense to use GdkAxisUse and
GdkAxisUseFlag in order to determine the axis capabilities of a device and draw
their axes.
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
Because there are multiple different types of styluses that can be used with
tablets, we have to have some sort of identifier for them attached to the
GdkDeviceTool, especially since knowing the actual tool type for a GdkDeviceTool
is necessary for matching up a GdkDeviceTool with it's appropriate
GdkInputSource in Wayland (eg. matching up a GdkDeviceTool eraser with the
GDK_SOURCE_ERASER GdkInputSource of a wayland tablet).
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
On the devices and backends that support it, this signal will be emitted
on slave/floating devices whenever the tool they are interacting with
changes. These notifications may also work as a sort of proximity events,
as the tool will be unset when the pen moves too far.
For backends, gdk_device_update_tool() has been included, all that should
be done on their side is just calling this whenever any tool might have
changed.
