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sdgui: use smooth scrolling

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Přemysl Eric Janouch 2022-07-24 21:36:57 +02:00
parent 4e4ba67025
commit 2c69937ef5
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 9 additions and 5 deletions
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14
src/stardict-view.c
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@ -395,9 +395,8 @@ stardict_view_realize (GtkWidget *widget)
// but it merely seems to involve more work.
.wclass = GDK_INPUT_OUTPUT,
.visual = gtk_widget_get_visual (widget),
// GDK_SMOOTH_SCROLL_MASK is useless, will stop sending UP/DOWN
.event_mask = gtk_widget_get_events (widget) | GDK_SCROLL_MASK,
.event_mask = gtk_widget_get_events (widget) | GDK_SCROLL_MASK
| GDK_SMOOTH_SCROLL_MASK,
};
// We need this window to receive input events at all.
@ -487,9 +486,14 @@ stardict_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
stardict_view_scroll (self, GTK_SCROLL_STEPS, +3);
return TRUE;
case GDK_SCROLL_SMOOTH:
self->top_offset += event->delta_y;
adjust_for_offset (self);
{
// On GDK/Wayland, the mouse wheel will typically create 1.5 deltas,
// after dividing a 15 degree click angle from libinput by 10.
// On X11, as libinput(4) indicates, the delta will always be 1.0.
double delta = CLAMP(event->delta_y, -1, +1);
stardict_view_scroll (self, GTK_SCROLL_STEPS, 3 * delta);
return TRUE;
}
default:
return FALSE;
}