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Simplify the path spinner demo

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The transforms were obscuring a simple
calculation here.
This commit is contained in:
Matthias Clasen 2023-08-27 07:42:36 -04:00
parent 2297a353b8
commit 1db75e521d
1 changed files with 8 additions and 19 deletions
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27
demos/gtk-demo/path_spinner.c
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@ -56,9 +56,9 @@ gtk_spinner_paintable_get_intrinsic_height (GdkPaintable *paintable)
static void
gtk_spinner_paintable_snapshot (GdkPaintable *paintable,
GdkSnapshot *snapshot,
double width,
double height)
GdkSnapshot *snapshot,
double width,
double height)
{
GtkSpinnerPaintable *self = GTK_SPINNER_PAINTABLE (paintable);
@ -190,27 +190,16 @@ update_path (GtkSpinnerPaintable *self)
{
GskPathBuilder *builder;
GskPathPoint start, end;
GskTransform *t;
graphene_point_t p, p0, p1;
graphene_point_t p0, p1;
float start_angle, end_angle;
p = GRAPHENE_POINT_INIT (40, 0);
start_angle = self->angle;
end_angle = fmod (self->angle + 360 * self->completion / 100, 360);
t = gsk_transform_translate (
gsk_transform_rotate (
gsk_transform_translate (NULL, &GRAPHENE_POINT_INIT (50, 50)),
start_angle),
&GRAPHENE_POINT_INIT (-50, -50));
gsk_transform_transform_point (t, &p, &p0);
t = gsk_transform_translate (
gsk_transform_rotate (
gsk_transform_translate (NULL, &GRAPHENE_POINT_INIT (50, 50)),
end_angle),
&GRAPHENE_POINT_INIT (-50, -50));
gsk_transform_transform_point (t, &p, &p1);
p0 = GRAPHENE_POINT_INIT (50 + 40 * cos (M_PI * start_angle / 180),
50 + 40 * sin (M_PI * start_angle / 180));
p1 = GRAPHENE_POINT_INIT (50 + 40 * cos (M_PI * end_angle / 180),
50 + 40 * sin (M_PI * end_angle / 180));
g_clear_pointer (&self->path, gsk_path_unref);