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ClutterVirtualInputDevice: Add discrete scrolling

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Add emitting of discrete scrolling events (such as mouse scroll
wheel-like events).

https://bugzilla.gnome.org/show_bug.cgi?id=784199
This commit is contained in:
Jonas Ådahl 2016-08-23 15:39:02 +08:00
parent d3c559a917
commit a10ad577a7
3 changed files with 77 additions and 0 deletions
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13
clutter/clutter/clutter-virtual-input-device.c
View File

@ -115,6 +115,19 @@ clutter_virtual_input_device_notify_keyval (ClutterVirtualInputDevice *virtual_d
klass->notify_keyval (virtual_device, time_us, keyval, key_state);
}
void
clutter_virtual_input_device_notify_discrete_scroll (ClutterVirtualInputDevice *virtual_device,
uint64_t time_us,
ClutterScrollDirection direction,
ClutterScrollSource scroll_source)
{
ClutterVirtualInputDeviceClass *klass =
CLUTTER_VIRTUAL_INPUT_DEVICE_GET_CLASS (virtual_device);
klass->notify_discrete_scroll (virtual_device, time_us,
direction, scroll_source);
}
/**
* clutter_virtual_input_device_get_manager:
* @virtual_device: a virtual device

12
clutter/clutter/clutter-virtual-input-device.h
View File

@ -76,6 +76,11 @@ struct _ClutterVirtualInputDeviceClass
uint64_t time_us,
uint32_t keyval,
ClutterKeyState key_state);
void (*notify_discrete_scroll) (ClutterVirtualInputDevice *virtual_device,
uint64_t time_us,
ClutterScrollDirection direction,
ClutterScrollSource scroll_source);
};
CLUTTER_AVAILABLE_IN_ALL
@ -108,6 +113,13 @@ void clutter_virtual_input_device_notify_keyval (ClutterVirtualInputDevice *virt
uint32_t keyval,
ClutterKeyState key_state);
CLUTTER_AVAILABLE_IN_ALL
void clutter_virtual_input_device_notify_discrete_scroll (ClutterVirtualInputDevice *virtual_device,
uint64_t time_us,
ClutterScrollDirection direction,
ClutterScrollSource scroll_source);
CLUTTER_AVAILABLE_IN_ALL
ClutterDeviceManager * clutter_virtual_input_device_get_manager (ClutterVirtualInputDevice *virtual_device);

52
clutter/clutter/evdev/clutter-virtual-input-device-evdev.c
View File

@ -397,6 +397,57 @@ clutter_virtual_input_device_evdev_notify_keyval (ClutterVirtualInputDevice *vir
apply_level_modifiers (virtual_device, time_us, level, key_state);
}
static void
direction_to_discrete (ClutterScrollDirection direction,
double *discrete_dx,
double *discrete_dy)
{
switch (direction)
{
case CLUTTER_SCROLL_UP:
*discrete_dx = 0.0;
*discrete_dy = -1.0;
break;
case CLUTTER_SCROLL_DOWN:
*discrete_dx = 0.0;
*discrete_dy = 1.0;
break;
case CLUTTER_SCROLL_LEFT:
*discrete_dx = -1.0;
*discrete_dy = 0.0;
break;
case CLUTTER_SCROLL_RIGHT:
*discrete_dx = 1.0;
*discrete_dy = 0.0;
break;
case CLUTTER_SCROLL_SMOOTH:
g_assert_not_reached ();
break;
}
}
static void
clutter_virtual_input_device_evdev_notify_discrete_scroll (ClutterVirtualInputDevice *virtual_device,
uint64_t time_us,
ClutterScrollDirection direction,
ClutterScrollSource scroll_source)
{
ClutterVirtualInputDeviceEvdev *virtual_evdev =
CLUTTER_VIRTUAL_INPUT_DEVICE_EVDEV (virtual_device);
double discrete_dx = 0.0, discrete_dy = 0.0;
if (time_us == CLUTTER_CURRENT_TIME)
time_us = g_get_monotonic_time ();
direction_to_discrete (direction, &discrete_dx, &discrete_dy);
clutter_seat_evdev_notify_discrete_scroll (virtual_evdev->seat,
virtual_evdev->device,
time_us,
discrete_dx, discrete_dy,
scroll_source);
}
static void
clutter_virtual_input_device_evdev_get_property (GObject *object,
guint prop_id,
@ -500,6 +551,7 @@ clutter_virtual_input_device_evdev_class_init (ClutterVirtualInputDeviceEvdevCla
virtual_input_device_class->notify_button = clutter_virtual_input_device_evdev_notify_button;
virtual_input_device_class->notify_key = clutter_virtual_input_device_evdev_notify_key;
virtual_input_device_class->notify_keyval = clutter_virtual_input_device_evdev_notify_keyval;
virtual_input_device_class->notify_discrete_scroll = clutter_virtual_input_device_evdev_notify_discrete_scroll;
obj_props[PROP_SEAT] = g_param_spec_pointer ("seat",
P_("ClutterSeatEvdev"),