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GTK: Handle smooth scrolling according to the documentation

pull/1470/head
ruevs 2024-07-07 17:03:57 +03:00
parent a431c8b474
commit da71570570
1 changed files with 12 additions and 9 deletions
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13
src/platform/guigtk.cpp
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@ -571,22 +571,25 @@ protected:
bool on_scroll_event(GdkEventScroll *gdk_event) override {
double dx, dy;
GdkScrollDirection dir;
double delta;
// for gtk4 ??
// gdk_scroll_event_get_deltas((GdkEvent*)gdk_event, &dx, &dy);
// gdk_scroll_event_get_direction((GdkEvent*)gdk_event, &dir);
gdk_event_get_scroll_direction((GdkEvent*)gdk_event, &dir);
gdk_event_get_scroll_deltas((GdkEvent*)gdk_event, &dx, &dy);
double delta;
if(abs(dy) > 0) {
if(gdk_event_get_scroll_deltas((GdkEvent*)gdk_event, &dx, &dy)) {
delta = dy;
} else if(dir == GDK_SCROLL_UP) {
} else if(gdk_event_get_scroll_direction((GdkEvent*)gdk_event, &dir)) {
if(dir == GDK_SCROLL_UP) {
delta = 1;
} else if(dir == GDK_SCROLL_DOWN) {
delta = -1;
} else {
return false;
}
} else {
return false;
}
double x,y;
gdk_event_get_coords((GdkEvent*)gdk_event, &x, &y);