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https://github.com/brl/mutter.git
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x11: Add support for scroll valuators on XInput2.2
This commit is contained in:
Emmanuele Bassi
parent
6b07f8a3df
commit
676a317439
@ -50,6 +50,16 @@ typedef struct _ClutterKeyInfo
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ClutterModifierType modifiers;
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} ClutterKeyInfo;
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typedef struct _ClutterScrollInfo
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{
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guint axis_id;
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ClutterScrollDirection direction;
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gdouble increment;
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gdouble last_value;
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guint last_value_valid : 1;
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} ClutterScrollInfo;
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struct _ClutterInputDevice
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{
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GObject parent_instance;
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@ -102,6 +112,8 @@ struct _ClutterInputDevice
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guint n_keys;
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GArray *keys;
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GArray *scroll_info;
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guint has_cursor : 1;
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guint is_enabled : 1;
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};
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@ -170,6 +182,17 @@ gboolean _clutter_input_device_translate_axis (ClutterInputDev
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gdouble value,
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gdouble *axis_value);
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void _clutter_input_device_add_scroll_info (ClutterInputDevice *device,
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guint index_,
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ClutterScrollDirection direction,
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gdouble increment);
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void _clutter_input_device_reset_scroll_info (ClutterInputDevice *device);
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gboolean _clutter_input_device_get_scroll_delta (ClutterInputDevice *device,
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guint index_,
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gdouble value,
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ClutterScrollDirection *direction_p,
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gdouble *delta_p);
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G_END_DECLS
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#endif /* __CLUTTER_DEVICE_MANAGER_PRIVATE_H__ */
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@ -1444,3 +1444,99 @@ clutter_input_device_keycode_to_evdev (ClutterInputDevice *device,
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hardware_keycode,
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evdev_keycode);
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}
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void
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_clutter_input_device_add_scroll_info (ClutterInputDevice *device,
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guint index_,
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ClutterScrollDirection direction,
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gdouble increment)
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{
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ClutterScrollInfo info;
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g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
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g_return_if_fail (index_ < clutter_input_device_get_n_axes (device));
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info.axis_id = index_;
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info.direction = direction;
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info.increment = increment;
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info.last_value_valid = FALSE;
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if (device->scroll_info == NULL)
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{
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device->scroll_info = g_array_new (FALSE,
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FALSE,
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sizeof (ClutterScrollInfo));
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}
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g_array_append_val (device->scroll_info, info);
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}
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gboolean
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_clutter_input_device_get_scroll_delta (ClutterInputDevice *device,
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guint index_,
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gdouble value,
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ClutterScrollDirection *direction_p,
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gdouble *delta_p)
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{
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guint i;
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g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), FALSE);
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g_return_val_if_fail (index_ < clutter_input_device_get_n_axes (device), FALSE);
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if (device->scroll_info == NULL)
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return FALSE;
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for (i = 0; i < device->scroll_info->len; i++)
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{
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ClutterScrollInfo *info = &g_array_index (device->scroll_info,
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ClutterScrollInfo,
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i);
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if (info->axis_id == index_)
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{
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if (direction_p != NULL)
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*direction_p = info->direction;
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if (delta_p != NULL)
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*delta_p = 0.0;
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if (info->last_value_valid)
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{
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if (delta_p != NULL)
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{
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*delta_p = (value - info->last_value)
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/ info->increment;
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}
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info->last_value = value;
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}
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else
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{
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info->last_value = value;
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info->last_value_valid = TRUE;
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}
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return TRUE;
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}
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}
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return FALSE;
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}
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void
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_clutter_input_device_reset_scroll_info (ClutterInputDevice *device)
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{
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guint i;
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if (device->scroll_info == NULL)
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return;
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for (i = 0; i < device->scroll_info->len; i++)
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{
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ClutterScrollInfo *info = &g_array_index (device->scroll_info,
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ClutterScrollInfo,
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i);
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info->last_value_valid = FALSE;
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}
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}
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@ -239,7 +239,12 @@ clutter_backend_x11_create_device_manager (ClutterBackendX11 *backend_x11)
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{
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#ifdef HAVE_XINPUT_2
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int major = 2;
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#ifdef HAVE_XINPUT_2_2
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int minor = 2;
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#else
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int minor = 0;
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#endif /* HAVE_XINPUT_2_2 */
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if (XIQueryVersion (backend_x11->xdpy, &major, &minor) != BadRequest)
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{
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@ -154,6 +154,32 @@ translate_device_classes (Display *xdisplay,
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(XIValuatorClassInfo *) class_info);
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break;
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#ifdef XINPUT_2_2
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case XIScrollClass:
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{
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XIScrollClassInfo *scroll_info = (XIScrollClassInfo *) class_info;
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ClutterScrollDirection direction;
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if (scroll_info->scroll_type == XIScrollTypeVertical)
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direction = CLUTTER_SCROLL_DOWN;
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else
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direction = CLUTTER_SCROLL_RIGHT;
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CLUTTER_NOTE (BACKEND, "Scroll valuator %d: %s, increment: %f",
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scroll_info->number,
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scroll_info->scroll_type == XIScrollTypeVertical
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? "vertical"
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: "horizontal",
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scroll_info->increment);
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_clutter_input_device_add_scroll_info (device,
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scroll_info->number,
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direction,
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scroll_info->increment);
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}
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break;
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#endif /* XINPUT_2_2 */
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default:
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break;
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}
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@ -541,6 +567,51 @@ translate_axes (ClutterInputDevice *device,
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return retval;
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}
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static gdouble
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scroll_valuators_changed (ClutterInputDevice *device,
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XIValuatorState *valuators,
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gdouble *dx_p,
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gdouble *dy_p)
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{
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gboolean retval = FALSE;
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guint n_axes, n_val, i;
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double *values;
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n_axes = clutter_input_device_get_n_axes (device);
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values = valuators->values;
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*dx_p = *dy_p = 0.0;
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n_val = 0;
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for (i = 0; i < MIN (valuators->mask_len * 8, n_axes); i++)
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{
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ClutterScrollDirection direction;
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gdouble delta;
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if (!XIMaskIsSet (valuators->mask, i))
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continue;
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if (_clutter_input_device_get_scroll_delta (device, i,
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values[n_val],
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&direction,
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&delta))
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{
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retval = TRUE;
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if (direction == CLUTTER_SCROLL_UP ||
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direction == CLUTTER_SCROLL_DOWN)
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*dx_p = delta;
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else
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*dy_p = delta;
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}
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n_val += 1;
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}
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return retval;
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}
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static ClutterTranslateReturn
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clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
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gpointer native,
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@ -793,6 +864,44 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
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case XI_Motion:
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{
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XIDeviceEvent *xev = (XIDeviceEvent *) xi_event;
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gdouble delta_x, delta_y;
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source_device = g_hash_table_lookup (manager_xi2->devices_by_id,
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GINT_TO_POINTER (xev->sourceid));
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if (scroll_valuators_changed (source_device,
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&xev->valuators,
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&delta_x, &delta_y))
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{
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event->scroll.type = event->type = CLUTTER_SCROLL;
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event->scroll.direction = CLUTTER_SCROLL_SMOOTH;
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event->scroll.stage = stage;
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event->scroll.time = xev->time;
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event->scroll.x = xev->event_x;
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event->scroll.y = xev->event_y;
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event->scroll.modifier_state =
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_clutter_input_device_xi2_translate_state (&xev->mods,
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&xev->buttons);
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clutter_event_set_scroll_delta (event, delta_x, delta_y);
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clutter_event_set_source_device (event, source_device);
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device = g_hash_table_lookup (manager_xi2->devices_by_id,
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GINT_TO_POINTER (xev->deviceid));
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clutter_event_set_device (event, device);
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CLUTTER_NOTE (EVENT,
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"smooth scroll: win:0x%x device:%s (x:%.2f, y:%.2f, delta:%f, %f)",
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(unsigned int) stage_x11->xwin,
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event->scroll.device->device_name,
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event->scroll.x,
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event->scroll.y,
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delta_x, delta_y);
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retval = CLUTTER_TRANSLATE_QUEUE;
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break;
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}
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event->motion.type = event->type = CLUTTER_MOTION;
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@ -805,8 +914,6 @@ clutter_device_manager_xi2_translate_event (ClutterEventTranslator *translator,
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_clutter_input_device_xi2_translate_state (&xev->mods,
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&xev->buttons);
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source_device = g_hash_table_lookup (manager_xi2->devices_by_id,
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GINT_TO_POINTER (xev->sourceid));
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clutter_event_set_source_device (event, source_device);
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device = g_hash_table_lookup (manager_xi2->devices_by_id,
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