From 26aa4b4f4cd640620e8db2a60912000f63c6c5b8 Mon Sep 17 00:00:00 2001
From: Daniel Francis <francis@sugarlabs.org>
Date: Fri, 20 Jul 2012 01:23:22 +0000
Subject: Show G cleff

---
diff --git a/.gitignore b/.gitignore
index 1e4c0c4..39406f6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 *.pyo
 *.mo
 *~
+clefs.svg
diff --git a/clef.py b/clef.py
new file mode 100644
index 0000000..61f935a
--- /dev/null
+++ b/clef.py
@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright 2012 S. Daniel Francis <francis@sugarlabs.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+import os
+
+import cairo
+import rsvg
+
+CLEF_C3 = 0
+CLEF_C4 = 1
+CLEF_F = 2
+CLEF_G = 3
+
+
+class Clef:
+    clef_type = CLEF_G
+    clefs = [None, None, None, rsvg.Handle(file=os.path.join(
+                    os.environ['SUGAR_BUNDLE_PATH'], 'symbols/Gclef.svg'))]
+
+    def __init__(self):
+        pass
+
+    def draw(self, context, xcorner, ytop, width, height):
+        svg = self.clefs[self.clef_type]
+        matrix = cairo.Matrix(xx=width / svg.props.width,
+                              yy=height / svg.props.height,
+                              x0=xcorner,
+                              y0=ytop)
+        context.transform(matrix)
+        svg.render_cairo(context)
diff --git a/instruments/instrument.py b/instruments/instrument.py
index d6871b4..3d3f3fc 100644
--- a/instruments/instrument.py
+++ b/instruments/instrument.py
@@ -39,7 +39,8 @@ class Instrument:
         self.svg = rsvg.Handle(file=os.path.join(
             os.environ['SUGAR_BUNDLE_PATH'], 'symbols/accolade.svg'))
 
-    def draw(self, context, width, lmarg, rmarg, linespacing, bracket_cr):
+    def draw(self, window, width, lmarg, rmarg, linespacing):
+        accolade_cr = window.cairo_create()
 
         xx = lmarg * 0.20 / self.svg.props.width
         x0 = lmarg
@@ -50,15 +51,15 @@ class Instrument:
             staff.rmarg = rmarg
             staff.spacing = linespacing
             staff.y = self.ymax
-            staff.draw(context, width)
+            staff.draw(window, width)
             self.ymax = staff.ymax
         yy = (self.ymax - self.ymin - linespacing * 4) / self.svg.props.height
         matrix = cairo.Matrix(xx=xx,
                               yy=yy,
                               x0=x0,
                               y0=y0)
-        bracket_cr.transform(matrix)
-        self.svg.render_cairo(bracket_cr)
+        accolade_cr.transform(matrix)
+        self.svg.render_cairo(accolade_cr)
 
     def guess_height(self, linespace):
         return len(self.staves) * linespace * 9
diff --git a/instruments/piano.py b/instruments/piano.py
index 127a06c..b3cd48d 100644
--- a/instruments/piano.py
+++ b/instruments/piano.py
@@ -22,6 +22,7 @@ from gettext import gettext as _
 
 from staff import Staff
 from instrument import Instrument
+import clef
 
 
 class Piano(Instrument):
@@ -29,5 +30,9 @@ class Piano(Instrument):
 
     def __init__(self):
         Instrument.__init__(self)
-        self.staves.append(Staff())
-        self.staves.append(Staff())
+        top_staff = Staff()
+        top_staff.clef = clef.Clef()
+        bottom_staff = Staff()
+        bottom_staff.clef = clef.Clef()
+        self.staves.append(top_staff)
+        self.staves.append(bottom_staff)
diff --git a/staff.py b/staff.py
index 18f2dbb..710c9a0 100644
--- a/staff.py
+++ b/staff.py
@@ -25,21 +25,22 @@ class Staff:
     rmarg = 0
     spacing = 0
     ymax = 0
+    clef = None
 
     def __init__(self):
         pass
 
-    def draw(self, context, width, margin=None):
+    def draw(self, window, width):
+        context = window.cairo_create()
         context.set_source_rgb(0, 0, 0)
         context.set_line_width(2)
         line_y = self.y + self.spacing * 2
         for i in range(5):
-            if margin != None:
-                x = margin
-            else:
-                x = self.lmarg
+            x = self.lmarg
             context.move_to(x, line_y)
             context.line_to(width - self.rmarg, line_y)
             line_y += self.spacing
         self.ymax = line_y + self.spacing * 2
         context.stroke()
+        self.clef.draw(window.cairo_create(), self.lmarg * 1.1, self.y,
+            self.lmarg * 0.3, self.ymax - self.y - self.spacing)
diff --git a/track.py b/track.py
index e4a21ae..0489145 100644
--- a/track.py
+++ b/track.py
@@ -47,8 +47,8 @@ class Track:
         context.move_to(5,
             self.linespacing * 10 * len(self.piano.staves) / 2 - height / 2)
         context.show_layout(layout)
-        self.piano.draw(context, width, text_width + 10,
-                                rmarg, self.linespacing, window.cairo_create())
+        self.piano.draw(window, width, text_width + 10,
+                                rmarg, self.linespacing)
 
         #start and end line
         context.set_line_width(2)
--
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