ocarina/image.py

This adds two new classes.  Image() inherits from a gtk.Image, and adds
set_height(x) to scale an image so it is x pixels high.  AlbumArt()
inherits from Image, and will display the album art of the currently
playing song.

ocarina/image.py

@@ -0,0 +1,49 @@
+# Bryan Schumaker (10/24/2010)
+import libsaria
+import gtk
+
+class Image(gtk.Image):
+	def __init__(self):
+		gtk.Image.__init__(self)
+		self.show()
+
+	def set_height(self, new_h):
+		buf = self.get_pixbuf()
+		if buf == None:
+			return
+		w = buf.get_width()
+		h = buf.get_height()
+		if h == new_h:
+			return
+		new_w = (float(w) / float(h)) * new_h
+		if new_w>0 and new_h>0:
+			buf = buf.scale_simple(int(new_w), int(new_h), gtk.gdk.INTERP_HYPER)
+			self.set_from_pixbuf(buf)
+
+
+class AlbumArt(Image):
+	def __init__(self):
+		Image.__init__(self)
+		self.hide()
+		self.file = None
+		libsaria.event.invite("PRELOAD", self.preload)
+		libsaria.event.invite("POSTGETART", self.set)
+
+	def preload(self, *args):
+		self.hide()
+
+	def set(self, file=None):
+		if file != None:
+			self.file = file
+		if self.file != None:
+			self.set_from_file(self.file)
+			self.set_height(64)
+			self.show()
+		else:
+			self.hide()
+
+	def set_height(self, new_h):
+		size = self.size_request()
+		if size[1] == new_h:
+			return
+		Image.set_height(self, new_h)