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devicemanager,xi2: Implement smooth scrolling

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XInput >= 2.1 allows for implementing smooth scrolling,
reporting the different scrolling axes as valuators.
Any change in those will be reported as GdkEventScroll
events with delta_x/y information.

the older kind of scroll events is still handled, and
emulated in devices able to provide smooth scrolling,
setting _gdk_event_set_pointer_emulated() in that case.
This commit is contained in:
Carlos Garnacho
2012-01-24 00:49:52 +01:00
committed by Matthias Clasen
parent f941c78969
commit 147cdd8465
3 changed files with 206 additions and 3 deletions
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9
gdk/x11/gdkprivate-x11.h
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@ -255,6 +255,15 @@ gint _gdk_x11_device_xi2_get_id (GdkX11DeviceXI2 *device);
GdkDevice * _gdk_x11_device_manager_xi2_lookup (GdkX11DeviceManagerXI2 *device_manager_xi2,
gint device_id);
void _gdk_x11_device_xi2_add_scroll_valuator (GdkX11DeviceXI2 *device,
guint n_valuator,
GdkScrollDirection direction);
gboolean _gdk_x11_device_xi2_get_scroll_delta (GdkX11DeviceXI2 *device,
guint n_valuator,
gdouble valuator_value,
GdkScrollDirection *direction_ret,
gdouble *delta_ret);
void _gdk_device_xi2_reset_scroll_valuators (GdkX11DeviceXI2 *device);
#endif