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sdgui: make an attempt at smooth scrolling

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This commit is contained in:
Přemysl Eric Janouch 2021-10-20 09:46:06 +02:00
parent aa3ad12d44
commit dd7b258698
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 7 additions and 5 deletions
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12
src/stardict-view.c
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@ -395,8 +395,9 @@ stardict_view_realize (GtkWidget *widget)
// Input-only would presumably also work (as in GtkPathBar, e.g.),
// 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,
};
@ -481,15 +482,16 @@ stardict_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
switch (event->direction)
{
case GDK_SCROLL_UP:
self->top_offset -= 3 * natural_row_size (widget);
adjust_for_offset (self);
stardict_view_scroll (self, GTK_SCROLL_STEPS, -3);
return TRUE;
case GDK_SCROLL_DOWN:
self->top_offset += 3 * natural_row_size (widget);
stardict_view_scroll (self, GTK_SCROLL_STEPS, +3);
return TRUE;
case GDK_SCROLL_SMOOTH:
self->top_offset += event->delta_y;
adjust_for_offset (self);
return TRUE;
default:
// GDK_SCROLL_SMOOTH doesn't fit the intended way of usage
return FALSE;
}
}