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shell: Stop moving surfae after touch point 0 goes up 

The grab stays alive as long as at least one touch point is down.  If touch
point 0 is lifted while other touch points are down, the surface will jump
around when touch point 0 is put down again.

This change marks the grab as inactive once touch point 0 is lifted
and then ignores touch events until all touch points eventually are
lifted and the grab terminates.

https://bugs.freedesktop.org/show_bug.cgi?id=73750
This commit is contained in:
Kristian Høgsberg 2014-01-17 15:18:10 -08:00
parent 1be87e3c81
commit 8e80a31ba4
1 changed files with 6 additions and 1 deletions
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7
desktop-shell/shell.c
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@ -198,6 +198,7 @@ struct weston_move_grab {
struct weston_touch_move_grab {
struct shell_touch_grab base;
int active;
wl_fixed_t dx, dy;
};
@ -1313,6 +1314,9 @@ touch_move_grab_up(struct weston_touch_grab *grab, uint32_t time, int touch_id)
(struct weston_touch_move_grab *) container_of(
grab, struct shell_touch_grab, grab);
if (touch_id == 0)
move->active = 0;
if (grab->touch->num_tp == 0) {
shell_touch_grab_end(&move->base);
free(move);
@ -1329,7 +1333,7 @@ touch_move_grab_motion(struct weston_touch_grab *grab, uint32_t time,
int dx = wl_fixed_to_int(grab->touch->grab_x + move->dx);
int dy = wl_fixed_to_int(grab->touch->grab_y + move->dy);
if (!shsurf)
if (!shsurf || !move->active)
return;
es = shsurf->surface;
@ -1374,6 +1378,7 @@ surface_touch_move(struct shell_surface *shsurf, struct weston_seat *seat)
if (!move)
return -1;
move->active = 1;
move->dx = wl_fixed_from_double(shsurf->view->geometry.x) -
seat->touch->grab_x;
move->dy = wl_fixed_from_double(shsurf->view->geometry.y) -