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Allow for a 0 button on button scrolling

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This effectively disables the button scrolling, but since 0 is the default
button for most devices, we should allow setting the default button.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Peter Hutterer 2014-11-19 11:22:17 +10:00
parent 617bab3731
commit c7bf6fb0e2
2 changed files with 3 additions and 1 deletions
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2
src/libinput.c
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@ -1591,7 +1591,7 @@ libinput_device_config_scroll_set_button(struct libinput_device *device,
LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN) == 0)
return LIBINPUT_CONFIG_STATUS_UNSUPPORTED;
if (!libinput_device_has_button(device, button))
if (button && !libinput_device_has_button(device, button))
return LIBINPUT_CONFIG_STATUS_INVALID;
return device->config.scroll_mode->set_button(device, button);

2
src/libinput.h
View file

@ -2169,6 +2169,8 @@ libinput_device_config_scroll_get_default_mode(struct libinput_device *device);
* @note Setting the button does not change the scroll mode. To change the
* scroll mode call libinput_device_config_scroll_set_mode().
*
* If the button is 0, button scrolling is effectively disabled.
*
* @param device The device to configure
* @param button The button which when pressed switches to sending scroll events
*