324 lines
8.5 KiB
C
324 lines
8.5 KiB
C
/* Path/Spinner
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*
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* This demo shows how to use GskPath to draw a simple animation
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* that could be used as a spinner.
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*/
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#include <glib/gi18n.h>
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#include <gtk/gtk.h>
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#include "paintable.h"
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#undef SHOW_CONTROLS
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#define GTK_TYPE_SPINNER_PAINTABLE (gtk_spinner_paintable_get_type ())
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G_DECLARE_FINAL_TYPE (GtkSpinnerPaintable, gtk_spinner_paintable, GTK, SPINNER_PAINTABLE, GObject)
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struct _GtkSpinnerPaintable
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{
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GObject parent_instance;
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gint64 start_time;
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int width;
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double angle;
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double completion;
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GskPath *circle;
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GskPath *path;
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GskStroke *stroke;
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GdkRGBA color;
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GdkRGBA circle_color;
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#ifdef SHOW_CONTROLS
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GskPath *controls;
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GdkRGBA control_color;
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#endif
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};
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struct _GtkSpinnerPaintableClass
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{
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GObjectClass parent_class;
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};
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static int
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gtk_spinner_paintable_get_intrinsic_width (GdkPaintable *paintable)
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{
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GtkSpinnerPaintable *self = GTK_SPINNER_PAINTABLE (paintable);
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return self->width;
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}
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static int
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gtk_spinner_paintable_get_intrinsic_height (GdkPaintable *paintable)
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{
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GtkSpinnerPaintable *self = GTK_SPINNER_PAINTABLE (paintable);
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return self->width;
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}
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static void
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gtk_spinner_paintable_snapshot (GdkPaintable *paintable,
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GdkSnapshot *snapshot,
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double width,
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double height)
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{
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GtkSpinnerPaintable *self = GTK_SPINNER_PAINTABLE (paintable);
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gtk_snapshot_append_stroke (snapshot, self->circle, self->stroke, &self->circle_color);
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gtk_snapshot_append_stroke (snapshot, self->path, self->stroke, &self->color);
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#ifdef SHOW_CONTROLS
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GskStroke *stroke = gsk_stroke_new (1);
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gtk_snapshot_append_stroke (snapshot, self->controls, stroke, &self->control_color);
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gsk_stroke_free (stroke);
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#endif
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}
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static GdkPaintableFlags
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gtk_spinner_paintable_get_flags (GdkPaintable *paintable)
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{
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return GDK_PAINTABLE_STATIC_SIZE;
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}
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static void
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gtk_spinner_paintable_paintable_init (GdkPaintableInterface *iface)
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{
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iface->get_intrinsic_width = gtk_spinner_paintable_get_intrinsic_width;
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iface->get_intrinsic_height = gtk_spinner_paintable_get_intrinsic_height;
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iface->snapshot = gtk_spinner_paintable_snapshot;
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iface->get_flags = gtk_spinner_paintable_get_flags;
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}
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/* When defining the GType, we need to implement the GdkPaintable interface */
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G_DEFINE_TYPE_WITH_CODE (GtkSpinnerPaintable, gtk_spinner_paintable, G_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (GDK_TYPE_PAINTABLE,
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gtk_spinner_paintable_paintable_init))
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static void
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gtk_spinner_paintable_dispose (GObject *object)
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{
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GtkSpinnerPaintable *self = GTK_SPINNER_PAINTABLE (object);
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gsk_path_unref (self->circle);
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gsk_path_unref (self->path);
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#ifdef SHOW_CONTROLS
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gsk_path_unref (self->controls);
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#endif
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gsk_stroke_free (self->stroke);
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G_OBJECT_CLASS (gtk_spinner_paintable_parent_class)->dispose (object);
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}
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static void
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gtk_spinner_paintable_class_init (GtkSpinnerPaintableClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->dispose = gtk_spinner_paintable_dispose;
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}
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static void
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gtk_spinner_paintable_init (GtkSpinnerPaintable *self)
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{
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}
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static GdkPaintable *
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gtk_spinner_paintable_new (void)
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{
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GtkSpinnerPaintable *self;
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GskPathBuilder *builder;
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self = g_object_new (GTK_TYPE_SPINNER_PAINTABLE, NULL);
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builder = gsk_path_builder_new ();
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gsk_path_builder_add_circle (builder, &GRAPHENE_POINT_INIT (50, 50), 40);
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self->circle = gsk_path_builder_free_to_path (builder);
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self->width = 100;
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self->angle = 0;
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self->completion = 1;
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gdk_rgba_parse (&self->color, "green");
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gdk_rgba_parse (&self->circle_color, "lightgray");
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#ifdef SHOW_CONTROLS
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gdk_rgba_parse (&self->control_color, "black");
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#endif
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self->stroke = gsk_stroke_new (5);
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return GDK_PAINTABLE (self);
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}
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#ifdef SHOW_CONTROLS
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static gboolean
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add_controls (GskPathOperation op,
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const graphene_point_t *pts,
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gsize n_pts,
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float weight,
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gpointer data)
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{
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GskPathBuilder *builder = data;
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switch (op)
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{
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case GSK_PATH_MOVE:
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gsk_path_builder_move_to (builder, pts[0].x, pts[0].y);
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break;
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case GSK_PATH_CLOSE:
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case GSK_PATH_LINE:
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gsk_path_builder_line_to (builder, pts[1].x, pts[1].y);
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break;
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case GSK_PATH_QUAD:
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case GSK_PATH_CONIC:
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gsk_path_builder_line_to (builder, pts[1].x, pts[1].y);
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gsk_path_builder_line_to (builder, pts[2].x, pts[2].y);
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break;
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case GSK_PATH_CUBIC:
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gsk_path_builder_line_to (builder, pts[1].x, pts[1].y);
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gsk_path_builder_line_to (builder, pts[2].x, pts[2].y);
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gsk_path_builder_line_to (builder, pts[3].x, pts[3].y);
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break;
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default:
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g_assert_not_reached ();
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}
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return TRUE;
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}
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#endif
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static void
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update_path (GtkSpinnerPaintable *self)
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{
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GskPathBuilder *builder;
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GskPathPoint start, end;
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graphene_point_t p0, p1;
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float start_angle, end_angle;
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start_angle = self->angle;
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end_angle = fmod (self->angle + 360 * self->completion / 100, 360);
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p0 = GRAPHENE_POINT_INIT (50 + 40 * cos (M_PI * start_angle / 180),
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50 + 40 * sin (M_PI * start_angle / 180));
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p1 = GRAPHENE_POINT_INIT (50 + 40 * cos (M_PI * end_angle / 180),
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50 + 40 * sin (M_PI * end_angle / 180));
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g_clear_pointer (&self->path, gsk_path_unref);
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gsk_path_get_closest_point (self->circle, &p0, INFINITY, &start, NULL);
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gsk_path_get_closest_point (self->circle, &p1, INFINITY, &end, NULL);
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builder = gsk_path_builder_new ();
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gsk_path_builder_add_segment (builder, self->circle, &start, &end);
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self->path = gsk_path_builder_free_to_path (builder);
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#ifdef SHOW_CONTROLS
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g_clear_pointer (&self->controls, gsk_path_unref);
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builder = gsk_path_builder_new ();
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gsk_path_foreach (self->path, -1, add_controls, builder);
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self->controls = gsk_path_builder_free_to_path (builder);
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#endif
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gdk_paintable_invalidate_contents (GDK_PAINTABLE (self));
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}
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static void
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gtk_spinner_paintable_set_completion (GtkSpinnerPaintable *self,
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float completion)
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{
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self->completion = CLAMP (completion, 0, 100);
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update_path (self);
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}
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static float
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gtk_spinner_paintable_get_completion (GtkSpinnerPaintable *self)
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{
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return self->completion;
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}
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static void
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gtk_spinner_paintable_set_frame_time (GtkSpinnerPaintable *self,
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gint64 time)
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{
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double delta;
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if (self->start_time == 0)
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self->start_time = time;
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delta = (time - self->start_time) / (double) G_TIME_SPAN_SECOND;
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self->angle = fmod (60 * delta, 360);
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update_path (self);
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}
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static gboolean
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tick_cb (GtkWidget *widget,
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GdkFrameClock *clock,
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gpointer data)
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{
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GtkSpinnerPaintable *self = data;
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gtk_spinner_paintable_set_frame_time (self, gdk_frame_clock_get_frame_time (clock));
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return G_SOURCE_CONTINUE;
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}
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static gboolean
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progress_timeout (gpointer data)
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{
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GtkSpinnerPaintable *self = data;
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static float progress_delta = 0.5;
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float progress;
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progress = gtk_spinner_paintable_get_completion (self);
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if (progress >= 100 || progress <= 0)
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progress_delta = -progress_delta;
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gtk_spinner_paintable_set_completion (self, progress + progress_delta);
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return G_SOURCE_CONTINUE;
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}
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static void
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unset_timeout (gpointer data)
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{
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g_source_remove (GPOINTER_TO_UINT (data));
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}
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GtkWidget *
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do_path_spinner (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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if (!window)
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{
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GtkWidget *picture;
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GdkPaintable *paintable;
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guint timeout_id;
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window = gtk_window_new ();
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gtk_window_set_resizable (GTK_WINDOW (window), TRUE);
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gtk_window_set_title (GTK_WINDOW (window), "Spinner");
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g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
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paintable = gtk_spinner_paintable_new ();
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picture = gtk_picture_new_for_paintable (paintable);
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gtk_picture_set_content_fit (GTK_PICTURE (picture), GTK_CONTENT_FIT_CONTAIN);
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gtk_picture_set_can_shrink (GTK_PICTURE (picture), FALSE);
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g_object_unref (paintable);
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gtk_widget_add_tick_callback (picture, tick_cb, paintable, NULL);
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timeout_id = g_timeout_add (100, progress_timeout, paintable);
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g_object_set_data_full (G_OBJECT (picture), "timeout", GUINT_TO_POINTER (timeout_id), unset_timeout);
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gtk_window_set_child (GTK_WINDOW (window), picture);
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}
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if (!gtk_widget_get_visible (window))
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gtk_window_present (GTK_WINDOW (window));
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else
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gtk_window_destroy (GTK_WINDOW (window));
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return window;
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}
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