_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_handle (priv->theming_engine, cr, x, y, width, height);
}
+
+void
+gtk_render_activity (GtkStyleContext *context,
+ cairo_t *cr,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height)
+{
+ GtkStyleContextPrivate *priv;
+ GtkThemingEngineClass *engine_class;
+
+ g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
+ g_return_if_fail (cr != NULL);
+
+ priv = context->priv;
+ engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
+
+ store_animation_region (context, x, y, width, height);
+
+ _gtk_theming_engine_set_context (priv->theming_engine, context);
+ engine_class->render_activity (priv->theming_engine, cr, x, y, width, height);
+}
gdouble y,
gdouble width,
gdouble height);
+static void gtk_theming_engine_render_activity (GtkThemingEngine *engine,
+ cairo_t *cr,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height);
G_DEFINE_TYPE (GtkThemingEngine, gtk_theming_engine, G_TYPE_OBJECT)
klass->render_frame_gap = gtk_theming_engine_render_frame_gap;
klass->render_extension = gtk_theming_engine_render_extension;
klass->render_handle = gtk_theming_engine_render_handle;
+ klass->render_activity = gtk_theming_engine_render_activity;
/**
* GtkThemingEngine:name:
gdk_rgba_free (bg_color);
}
+
+static void
+gtk_theming_engine_render_activity (GtkThemingEngine *engine,
+ cairo_t *cr,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height)
+{
+ if (gtk_theming_engine_has_class (engine, "spinner"))
+ {
+ GtkStateFlags state;
+ guint num_steps, step;
+ GdkRGBA *color;
+ gdouble dx, dy;
+ gdouble progress;
+ gdouble radius;
+ gdouble half;
+ gint i;
+
+ gtk_theming_engine_get_style (engine,
+ "num-steps", &num_steps,
+ NULL);
+
+ state = gtk_theming_engine_get_state (engine);
+ gtk_theming_engine_get (engine, state,
+ "color", &color,
+ NULL);
+ if (num_steps == 0)
+ num_steps = 12;
+
+ if (gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress))
+ step = (guint) (progress * num_steps);
+ else
+ step = 0;
+
+ cairo_save (cr);
+
+ cairo_translate (cr, x, y);
+
+ /* draw clip region */
+ cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+
+ dx = width / 2;
+ dy = height / 2;
+ radius = MIN (width / 2, height / 2);
+ 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 = (gdouble) ((i + num_steps - step)
+ % num_steps) / num_steps;
+
+ cairo_save (cr);
+
+ cairo_set_source_rgba (cr,
+ color->red,
+ color->green,
+ color->blue,
+ color->alpha * t);
+
+ cairo_set_line_width (cr, 2.0);
+ cairo_move_to (cr,
+ dx + (radius - inset) * cos (i * G_PI / half),
+ dy + (radius - inset) * sin (i * G_PI / half));
+ cairo_line_to (cr,
+ dx + radius * cos (i * G_PI / half),
+ dy + radius * sin (i * G_PI / half));
+ cairo_stroke (cr);
+
+ cairo_restore (cr);
+ }
+
+ cairo_restore (cr);
+
+ gdk_rgba_free (color);
+ }
+ else
+ {
+ gtk_theming_engine_render_background (engine, cr, x, y, width, height);
+ gtk_theming_engine_render_frame (engine, cr, x, y, width, height);
+ }
+}