aboutsummaryrefslogtreecommitdiffstats
path: root/src/empathy-rounded-rectangle.c
diff options
context:
space:
mode:
authorEmilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>2011-08-17 20:20:29 +0800
committerEmilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>2011-08-19 17:27:27 +0800
commitc1eb12ebde6572a01744a8120440e630c8920d3a (patch)
treed07b5a0317af884a099e493b75337d7117f263d9 /src/empathy-rounded-rectangle.c
parentb11d6d385735ef43450271d7f07604448f751ce2 (diff)
downloadgsoc2013-empathy-c1eb12ebde6572a01744a8120440e630c8920d3a.tar
gsoc2013-empathy-c1eb12ebde6572a01744a8120440e630c8920d3a.tar.gz
gsoc2013-empathy-c1eb12ebde6572a01744a8120440e630c8920d3a.tar.bz2
gsoc2013-empathy-c1eb12ebde6572a01744a8120440e630c8920d3a.tar.lz
gsoc2013-empathy-c1eb12ebde6572a01744a8120440e630c8920d3a.tar.xz
gsoc2013-empathy-c1eb12ebde6572a01744a8120440e630c8920d3a.tar.zst
gsoc2013-empathy-c1eb12ebde6572a01744a8120440e630c8920d3a.zip
Add a rectangle actor with rounded corners
This is a ClutterCairoTexture subclass and uses Cairo for drawing as Cairo is antialiased while Cogl is not. https://bugzilla.gnome.org/show_bug.cgi?id=656576
Diffstat (limited to 'src/empathy-rounded-rectangle.c')
-rw-r--r--src/empathy-rounded-rectangle.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/src/empathy-rounded-rectangle.c b/src/empathy-rounded-rectangle.c
new file mode 100644
index 000000000..e06889d58
--- /dev/null
+++ b/src/empathy-rounded-rectangle.c
@@ -0,0 +1,133 @@
+/*
+ * 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 <math.h>
+
+#include <clutter/clutter.h>
+
+#include "empathy-rounded-rectangle.h"
+
+G_DEFINE_TYPE (EmpathyRoundedRectangle,
+ empathy_rounded_rectangle,
+ CLUTTER_TYPE_CAIRO_TEXTURE)
+
+struct _EmpathyRoundedRectanglePriv
+{
+ ClutterColor border_color;
+ guint border_width;
+};
+
+static void
+empathy_rounded_rectangle_paint (EmpathyRoundedRectangle *self)
+{
+ guint width, height;
+ guint tmp_alpha;
+ cairo_t *cr;
+
+#define RADIUS (height / 8.)
+
+ clutter_cairo_texture_get_surface_size (CLUTTER_CAIRO_TEXTURE (self),
+ &width, &height);
+
+ /* 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;
+
+ cr = clutter_cairo_texture_create (CLUTTER_CAIRO_TEXTURE (self));
+
+ cairo_set_source_rgba (cr,
+ self->priv->border_color.red,
+ self->priv->border_color.green,
+ self->priv->border_color.blue,
+ tmp_alpha);
+
+ cairo_set_line_width (cr, self->priv->border_width);
+
+ cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
+ cairo_paint (cr);
+ cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+
+ 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);
+ cairo_destroy (cr);
+
+#undef RADIUS
+}
+
+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;
+}
+
+static void
+empathy_rounded_rectangle_class_init (EmpathyRoundedRectangleClass *klass)
+{
+ g_type_class_add_private (klass, sizeof (EmpathyRoundedRectanglePriv));
+}
+
+ClutterActor *
+empathy_rounded_rectangle_new (guint width,
+ guint height)
+{
+ ClutterActor *self;
+
+ self = CLUTTER_ACTOR (g_object_new (EMPATHY_TYPE_ROUNDED_RECTANGLE, NULL));
+
+ clutter_cairo_texture_set_surface_size (CLUTTER_CAIRO_TEXTURE (self),
+ width, height);
+
+ empathy_rounded_rectangle_paint (EMPATHY_ROUNDED_RECTANGLE (self));
+
+ return self;
+}
+
+void
+empathy_rounded_rectangle_set_border_width (EmpathyRoundedRectangle *self,
+ guint border_width)
+{
+ self->priv->border_width = border_width;
+
+ empathy_rounded_rectangle_paint (self);
+}
+
+void
+empathy_rounded_rectangle_set_border_color (EmpathyRoundedRectangle *self,
+ const ClutterColor *color)
+{
+ self->priv->border_color = *color;
+
+ empathy_rounded_rectangle_paint (self);
+}