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/*
* empathy-rounded-rectangle.c - Source for EmpathyRoundedRectangle
* Copyright (C) 2011 Collabora Ltd.
* @author Emilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <math.h>
#include <clutter/clutter.h>
#include "empathy-rounded-rectangle.h"
G_DEFINE_TYPE (EmpathyRoundedRectangle,
empathy_rounded_rectangle,
CLUTTER_TYPE_CAIRO_TEXTURE)
struct _EmpathyRoundedRectanglePriv
{
guint width, height;
ClutterColor border_color;
guint border_width;
guint round_factor;
};
static gboolean
draw_cb (ClutterCairoTexture *canvas,
cairo_t *cr)
{
EmpathyRoundedRectangle *self = EMPATHY_ROUNDED_RECTANGLE (canvas);
guint width, height;
guint border_width;
gdouble tmp_alpha;
gdouble radius;
width = self->priv->width;
height = self->priv->height;
radius = self->priv->height / self->priv->round_factor;
border_width = self->priv->border_width;
/* compute the composited opacity of the actor taking into
* account the opacity of the color set by the user */
tmp_alpha = (clutter_actor_get_paint_opacity (CLUTTER_ACTOR (self))
* self->priv->border_color.alpha) / 255.;
cairo_set_source_rgba (cr,
self->priv->border_color.red / 255.,
self->priv->border_color.green / 255.,
self->priv->border_color.blue / 255.,
tmp_alpha);
cairo_set_line_width (cr, border_width);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
/* make room for the portion of the border drawn on the outside */
cairo_translate (cr, border_width/2.0, border_width/2.0);
cairo_new_sub_path (cr);
cairo_arc (cr, width - radius, radius, radius,
-M_PI/2.0, 0);
cairo_arc (cr, width - radius, height - radius, radius,
0, M_PI/2.0);
cairo_arc (cr, radius, height - radius, radius,
M_PI/2.0, M_PI);
cairo_arc (cr, radius, radius, radius,
M_PI, -M_PI/2.0);
cairo_close_path (cr);
cairo_stroke (cr);
return TRUE;
}
static void
empathy_rounded_rectangle_init (EmpathyRoundedRectangle *self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
EMPATHY_TYPE_ROUNDED_RECTANGLE, EmpathyRoundedRectanglePriv);
self->priv->border_width = 1;
self->priv->round_factor = 2;
}
static void
empathy_rounded_rectangle_finalize (GObject *object)
{
G_OBJECT_CLASS (empathy_rounded_rectangle_parent_class)->finalize (object);
}
static void
empathy_rounded_rectangle_class_init (EmpathyRoundedRectangleClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = empathy_rounded_rectangle_finalize;
g_type_class_add_private (klass, sizeof (EmpathyRoundedRectanglePriv));
}
static void
empathy_rounded_rectangle_update_surface_size (EmpathyRoundedRectangle *self)
{
clutter_cairo_texture_set_surface_size (CLUTTER_CAIRO_TEXTURE (self),
self->priv->width + self->priv->border_width,
self->priv->height + self->priv->border_width);
}
EmpathyRoundedRectangle *
empathy_rounded_rectangle_new (guint width,
guint height,
guint round_factor)
{
EmpathyRoundedRectangle *self;
self = EMPATHY_ROUNDED_RECTANGLE (g_object_new (EMPATHY_TYPE_ROUNDED_RECTANGLE, NULL));
self->priv->width = width;
self->priv->height = height;
self->priv->round_factor = round_factor;
g_signal_connect (self, "draw", G_CALLBACK (draw_cb), NULL);
empathy_rounded_rectangle_update_surface_size (self);
clutter_cairo_texture_invalidate (CLUTTER_CAIRO_TEXTURE (self));
return self;
}
void
empathy_rounded_rectangle_set_border_width (EmpathyRoundedRectangle *self,
guint border_width)
{
self->priv->border_width = border_width;
empathy_rounded_rectangle_update_surface_size (self);
clutter_cairo_texture_invalidate (CLUTTER_CAIRO_TEXTURE (self));
}
void
empathy_rounded_rectangle_set_border_color (EmpathyRoundedRectangle *self,
const ClutterColor *color)
{
self->priv->border_color = *color;
clutter_cairo_texture_invalidate (CLUTTER_CAIRO_TEXTURE (self));
}
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