Created a pixmap rotation routine in Utils for handling those rotated labels.

[debian/gnuradio] / grc / gui / Utils.py

diff --git a/grc/gui/Utils.py b/grc/gui/Utils.py
index 83036a4b858c0c4eb5460738be7eb2f3e4002e6d..b5489d56e7ac5cc2c866ee385f9625605a40e750 100644 (file)
--- a/grc/gui/Utils.py
+++ b/grc/gui/Utils.py
@@ -19,8 +19,31 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 
 from Constants import POSSIBLE_ROTATIONS
 from Cheetah.Template import Template
+import pygtk
+pygtk.require('2.0')
+import gtk
 import gobject
 
+def rotate_pixmap(gc, src_pixmap, dst_pixmap, angle=gtk.gdk.PIXBUF_ROTATE_COUNTERCLOCKWISE):
+       """
+       Load the destination pixmap with a rotated version of the source pixmap.
+       The source pixmap will be loaded into a pixbuf, rotated, and drawn to the destination pixmap.
+       The pixbuf is a client-side drawable, where a pixmap is a server-side drawable.
+       @param gc the graphics context
+       @param src_pixmap the source pixmap
+       @param dst_pixmap the destination pixmap
+       @param angle the angle to rotate by
+       """
+       width, height = src_pixmap.get_size()
+       pixbuf = gtk.gdk.Pixbuf(
+               colorspace=gtk.gdk.COLORSPACE_RGB,
+               has_alpha=False, bits_per_sample=8,
+               width=width, height=height,
+       )
+       pixbuf.get_from_drawable(src_pixmap, src_pixmap.get_colormap(), 0, 0, 0, 0, -1, -1)
+       pixbuf = pixbuf.rotate_simple(angle)
+       dst_pixmap.draw_pixbuf(gc, pixbuf, 0, 0, 0, 0)
+
 def get_rotated_coordinate(coor, rotation):
        """
        Rotate the coordinate by the given rotation.