diff options
Diffstat (limited to 'gtk/gtkcssimagebuiltin.c')
| -rw-r--r-- | gtk/gtkcssimagebuiltin.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/gtk/gtkcssimagebuiltin.c b/gtk/gtkcssimagebuiltin.c index 6562931c21..d3644962b9 100644 --- a/gtk/gtkcssimagebuiltin.c +++ b/gtk/gtkcssimagebuiltin.c @@ -732,17 +732,44 @@ gtk_css_image_builtin_draw_spinner (GtkCssImage *image, double height) { GtkCssImageBuiltin *builtin = GTK_CSS_IMAGE_BUILTIN (image); + guint num_steps; gdouble radius; + gdouble half; + gint i; radius = MIN (width / 2, height / 2); - cairo_save (cr); cairo_translate (cr, width / 2, height / 2); - gdk_cairo_set_source_rgba (cr, &builtin->fg_color); - gtk_render_paint_spinner (cr, radius, -1); + num_steps = 12; + + cairo_set_line_width (cr, 2.0); - cairo_restore (cr); + half = num_steps / 2; + + for (i = 0; i < num_steps; i++) + { + gint inset = 0.7 * radius; + /* transparency is a function of time and intial value */ + gdouble t = 1.0 - (gdouble) i / num_steps; + gdouble xscale = - sin (i * G_PI / half); + gdouble yscale = - cos (i * G_PI / half); + + cairo_move_to (cr, + (radius - inset) * xscale, + (radius - inset) * yscale); + cairo_line_to (cr, + radius * xscale, + radius * yscale); + + cairo_set_source_rgba (cr, + builtin->fg_color.red, + builtin->fg_color.green, + builtin->fg_color.blue, + builtin->fg_color.alpha * t); + + cairo_stroke (cr); + } } static void |