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ViewGroup: adjust scroll velocity for touchpads

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This commit is contained in:
Julian Winkler
2023-09-01 14:24:27 +02:00
parent 3b6e4dc217
commit 0461834be0
1 changed files with 8 additions and 0 deletions
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8
src/api-impl-jni/views/android_view_ViewGroup.c
View File

@@ -72,9 +72,17 @@ static GtkLayoutManager *android_layout_new(jobject view) {
return &layout->parent_instance; return &layout->parent_instance;
} }
#define MAGIC_SCROLL_FACTOR 32
static gboolean scroll_cb(GtkEventControllerScroll* self, gdouble dx, gdouble dy, jobject this) static gboolean scroll_cb(GtkEventControllerScroll* self, gdouble dx, gdouble dy, jobject this)
{ {
JNIEnv *env = get_jni_env(); JNIEnv *env = get_jni_env();
GdkScrollUnit scroll_unit = gtk_event_controller_scroll_get_unit (self);
if (scroll_unit == GDK_SCROLL_UNIT_SURFACE) {
dx /= MAGIC_SCROLL_FACTOR;
dy /= MAGIC_SCROLL_FACTOR;
}
jobject motion_event = (*env)->NewObject(env, handle_cache.motion_event.class, handle_cache.motion_event.constructor, SOURCE_CLASS_POINTER, MOTION_EVENT_ACTION_SCROLL, dx, -dy); jobject motion_event = (*env)->NewObject(env, handle_cache.motion_event.class, handle_cache.motion_event.constructor, SOURCE_CLASS_POINTER, MOTION_EVENT_ACTION_SCROLL, dx, -dy);
gboolean ret = (*env)->CallBooleanMethod(env, this, handle_cache.view.onGenericMotionEvent, motion_event); gboolean ret = (*env)->CallBooleanMethod(env, this, handle_cache.view.onGenericMotionEvent, motion_event);