diff options
Diffstat (limited to 'gtk/gtkstyle.c')
| -rw-r--r-- | gtk/gtkstyle.c | 118 |
1 files changed, 117 insertions, 1 deletions
diff --git a/gtk/gtkstyle.c b/gtk/gtkstyle.c index 769fe79143..01f8ff02a6 100644 --- a/gtk/gtkstyle.c +++ b/gtk/gtkstyle.c @@ -313,6 +313,14 @@ static void gtk_default_draw_resize_grip (GtkStyle *style, gint y, gint width, gint height); +static void gtk_default_draw_spinner (GtkStyle *style, + GdkWindow *window, + GtkStateType state_type, + guint step, + gint x, + gint y, + gint width, + gint height); static void rgb_to_hls (gdouble *r, gdouble *g, @@ -511,6 +519,7 @@ gtk_style_class_init (GtkStyleClass *klass) klass->draw_expander = gtk_default_draw_expander; klass->draw_layout = gtk_default_draw_layout; klass->draw_resize_grip = gtk_default_draw_resize_grip; + klass->draw_spinner = gtk_default_draw_spinner; g_type_class_add_private (object_class, sizeof (GtkStylePrivate)); @@ -1764,8 +1773,9 @@ gtk_style_get_style_property (GtkStyle *style, GtkRcPropertyParser parser; const GValue *peek_value; - klass = g_type_class_peek (widget_type); + klass = g_type_class_ref (widget_type); pspec = gtk_widget_class_find_style_property (klass, property_name); + g_type_class_unref (klass); if (!pspec) { @@ -5598,6 +5608,80 @@ gtk_default_draw_resize_grip (GtkStyle *style, } } +static void +gtk_default_draw_spinner (GtkStyle *style, + GdkWindow *window, + GtkStateType state_type, + guint step, + gint x, + gint y, + gint width, + gint height) +{ + GdkColor *color; + cairo_t *cr; + guint num_steps; + gdouble dx, dy; + gdouble radius; + gdouble half; + gint i; + guint real_step; + + gtk_style_get (style, GTK_TYPE_SPINNER, + "num-steps", &num_steps, + NULL); + real_step = step % num_steps; + + /* get cairo context */ + cr = gdk_cairo_create (window); + + /* set a clip region for the expose event */ + cairo_rectangle (cr, x, y, width, height); + cairo_clip (cr); + + cairo_translate (cr, x, y); + + /* draw clip region */ + cairo_set_operator (cr, CAIRO_OPERATOR_OVER); + + color = &style->fg[state_type]; + 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 - real_step) + % num_steps) / num_steps; + + cairo_save (cr); + + cairo_set_source_rgba (cr, + color->red / 65535., + color->green / 65535., + color->blue / 65535., + 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); + } + + /* free memory */ + cairo_destroy (cr); +} + void _gtk_style_shade (const GdkColor *a, GdkColor *b, @@ -6632,6 +6716,38 @@ gtk_paint_resize_grip (GtkStyle *style, } /** + * gtk_paint_spinner: + * @style: a #GtkStyle + * @window: a #GdkWindow + * @state_type: a state + * @widget: the widget + * @step: the nth step, a value between 0 and GtkSpinner::num-steps + * @x: the x origin of the rectangle in which to draw the resize grip + * @y: the y origin of the rectangle in which to draw the resize grip + * @width: the width of the rectangle in which to draw the resize grip + * @height: the height of the rectangle in which to draw the resize grip + * + * Draws a spinner on @window using the given parameters. + */ +void +gtk_paint_spinner (GtkStyle *style, + GdkWindow *window, + GtkStateType state_type, + guint step, + gint x, + gint y, + gint width, + gint height) +{ + g_return_if_fail (GTK_IS_STYLE (style)); + g_return_if_fail (GTK_STYLE_GET_CLASS (style)->draw_spinner != NULL); + g_return_if_fail (style->depth == gdk_drawable_get_depth (window)); + + GTK_STYLE_GET_CLASS (style)->draw_spinner (style, window, state_type, + step, x, y, width, height); +} + +/** * gtk_border_new: * * Allocates a new #GtkBorder structure and initializes its elements to zero. |