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touchpad: reduce button size, use physical sizes where possible

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The current 20% is excessive. On the t440s, the button size amounts to ~14mm
from the bottom. On the x220 it amounts to ~9mm, leaving only 31mm as actual
touchpad.

Reduce it to 15% instead, which amounts to 10.5mm on the t440 and 6mm on the
x220. Cap the button height further by making buttons a maximum height of
10mm, anything larger than that is excessive anyway.

Smaller buttons should be acceptable since we can rely on the bottom edge to
be a haptic feedback and thus a good hit-target, somewhat simliar to how
screen edges are good hit-targets.

The top software buttons stay the same size, but prefer a physical size of 6mm
instead (which is 1mm below the button marker line on the T440s). If no y
resolution is available, fall back to the 8% which is 5.6mm on the T440s.

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 2014-07-02 15:41:22 +10:00
parent 2219c12c3a
commit ebc087fbf6
1 changed files with 19 additions and 2 deletions
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21
src/evdev-mt-touchpad-buttons.c
View file

@ -605,11 +605,28 @@ tp_init_buttons(struct tp_dispatch *tp,
if (tp->buttons.is_clickpad && !tp->buttons.use_clickfinger) {
int xoffset = absinfo_x->minimum,
yoffset = absinfo_y->minimum;
tp->buttons.bottom_area.top_edge = height * .8 + yoffset;
int yres = absinfo_y->resolution;
/* button height: 10mm or 15% of the touchpad height,
whichever is smaller */
if (yres > 1 && (height * 0.15/yres) > 10) {
tp->buttons.bottom_area.top_edge =
absinfo_y->maximum - 10 * yres;
} else {
tp->buttons.bottom_area.top_edge = height * .85 + yoffset;
}
tp->buttons.bottom_area.rightbutton_left_edge = width/2 + xoffset;
if (tp->buttons.has_topbuttons) {
tp->buttons.top_area.bottom_edge = height * .08 + yoffset;
/* T440s has the top button line 5mm from the top,
make the buttons 6mm high */
if (yres > 1) {
tp->buttons.top_area.bottom_edge =
yoffset + 6 * yres;
} else {
tp->buttons.top_area.bottom_edge = height * .08 + yoffset;
}
tp->buttons.top_area.rightbutton_left_edge = width * .58 + xoffset;
tp->buttons.top_area.leftbutton_right_edge = width * .42 + xoffset;
} else {