gnome-shell/src/shell-arrow.c

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include "config.h"
#include "shell-arrow.h"
#include <clutter/clutter.h>
#include <gtk/gtk.h>
#include <cairo.h>
enum {
PROP_0,
PROP_DIRECTION
};
G_DEFINE_TYPE(ShellArrow, shell_arrow, CLUTTER_TYPE_CAIRO_TEXTURE);
struct _ShellArrowPrivate {
GtkArrowType direction;
};
static void shell_arrow_redraw (ShellArrow *self);
static void
shell_arrow_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ShellArrow *self = SHELL_ARROW (object);
switch (prop_id)
{
case PROP_DIRECTION:
self->priv->direction = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
shell_arrow_redraw (self);
}
static void
shell_arrow_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ShellArrow *self = SHELL_ARROW (object);
switch (prop_id)
{
case PROP_DIRECTION:
g_value_set_enum (value, self->priv->direction);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
shell_arrow_redraw (ShellArrow *self)
{
cairo_t *cr;
guint width, height;
g_object_get (G_OBJECT (self), "surface-width", &width,
"surface-height", &height,
NULL);
if (width == 0)
return;
cr = clutter_cairo_texture_create (CLUTTER_CAIRO_TEXTURE (self));
cairo_set_source_rgb (cr, 1, 1, 1);
switch (self->priv->direction)
{
case GTK_ARROW_RIGHT:
cairo_move_to (cr, 0, 0);
cairo_line_to (cr, width, height*0.5);
cairo_line_to (cr, 0, height);
break;
case GTK_ARROW_LEFT:
cairo_move_to (cr, width, 0);
cairo_line_to (cr, 0, height*0.5);
cairo_line_to (cr, width, height);
break;
case GTK_ARROW_UP:
cairo_move_to (cr, 0, height);
cairo_line_to (cr, width*0.5, 0);
cairo_line_to (cr, width, height);
break;
case GTK_ARROW_DOWN:
cairo_move_to (cr, 0, 0);
cairo_line_to (cr, width*0.5, height);
cairo_line_to (cr, width, height);
break;
case GTK_ARROW_NONE:
default:
break;
}
cairo_close_path (cr);
cairo_fill (cr);
cairo_destroy (cr);
}
static void
shell_arrow_class_init (ShellArrowClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (ShellArrowPrivate));
object_class->get_property = shell_arrow_get_property;
object_class->set_property = shell_arrow_set_property;
g_object_class_install_property (object_class,
PROP_DIRECTION,
g_param_spec_enum ("direction",
"Direction",
"Direction",
GTK_TYPE_ARROW_TYPE,
GTK_ARROW_NONE,
G_PARAM_READWRITE));
}
static void
shell_arrow_init (ShellArrow *actor)
{
actor->priv = G_TYPE_INSTANCE_GET_PRIVATE (actor, SHELL_TYPE_ARROW,
ShellArrowPrivate);
g_signal_connect (actor, "notify::surface-width", G_CALLBACK (shell_arrow_redraw), NULL);
}