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Bug 798474 - Windows 10: Mouse scroll wheel on register...

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only scrolls 1 pixel at a time (instead of 1 line at a time)

Gdk supports fine-resolution smooth scrolling on macOS only.
This commit is contained in:
John Ralls 2022-03-13 13:30:49 -07:00
parent 7fd17ac0ac
commit aca8351376
1 changed files with 11 additions and 0 deletions
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11
gnucash/register/register-gnome/gnucash-sheet.c
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@ -1377,6 +1377,7 @@ gnucash_scroll_event (GtkWidget *widget, GdkEventScroll *event)
GnucashSheet *sheet;
GtkAdjustment *vadj;
gfloat h_value, v_value;
int direction;
g_return_val_if_fail (widget != NULL, TRUE);
g_return_val_if_fail (GNUCASH_IS_SHEET(widget), TRUE);
@ -1394,12 +1395,22 @@ gnucash_scroll_event (GtkWidget *widget, GdkEventScroll *event)
case GDK_SCROLL_DOWN:
v_value += gtk_adjustment_get_step_increment (vadj);
break;
/* GdkQuartz reserves GDK_SCROLL_SMOOTH for high-resolution touchpad
* scrolling events, and in that case scrolling by line is much too
* fast. Gdk/Wayland and Gdk/Win32 pass GDK_SCROLL_SMOOTH for all
* scroll-wheel events and expect coarse resolution.
*/
case GDK_SCROLL_SMOOTH:
h_value = gtk_adjustment_get_value (sheet->hadj);
h_value += event->delta_x;
h_value = clamp_scrollable_value (h_value, sheet->hadj);
gtk_adjustment_set_value (sheet->hadj, h_value);
#if defined MAC_INTEGRATION
v_value += event->delta_y;
#else
direction = event->delta_y > 0 ? 1 : event->delta_y < 0 ? -1 : 0;
v_value += gtk_adjustment_get_step_increment (vadj) * direction;
#endif
break;
default:
return FALSE;