[pitivi] curve.py: draw value label around focused keyframe

[Edward Hervey <edwardrv src gnome org>]

commit 8b0877a53363d26df3026e38f7421fcdba75c464
Author: Brandon Lewis <brandon_lewis berkeley edu>
Date:   Mon Aug 17 15:41:26 2009 -0700

    curve.py: draw value label around focused keyframe

 pitivi/ui/curve.py |   22 +++++++++++++++++++++-
 1 files changed, 21 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/ui/curve.py b/pitivi/ui/curve.py
index 47f79a7..a20bf8b 100644
--- a/pitivi/ui/curve.py
+++ b/pitivi/ui/curve.py
@@ -31,7 +31,7 @@ from pitivi.ui.zoominterface import Zoomable
 import pitivi.ui.previewer as previewer
 from pitivi.ui.view import View
 from pitivi.ui.controller import Controller
-from pitivi.ui.common import LAYER_HEIGHT_EXPANDED
+from pitivi.ui.common import LAYER_HEIGHT_EXPANDED, roundedrec
 import pitivi.ui.point as point
 from pitivi.utils import between
 
@@ -45,6 +45,13 @@ KW_WIDTH2 = KW_WIDTH / 2
 KW_HEIGHT2 = KW_HEIGHT / 2
 KW_MOUSE_WIDTH = KW_WIDTH2 + 1
 KW_MOUSE_HEIGHT = KW_HEIGHT2 + 1
+KW_LABEL_X_OFFSET = KW_WIDTH2 + 5
+KW_LABEL_Y_OFFSET = -10
+KW_LABEL_HPAD = 4
+KW_LABEL_VPAD = 4
+KW_LABEL_HPAD2 = KW_LABEL_VPAD / 2
+KW_LABEL_VPAD2 = KW_LABEL_VPAD / 2
+
 CURVE_STROKE_WIDTH = 2.0
 HAND = gtk.gdk.Cursor(gtk.gdk.HAND2)
 
@@ -227,6 +234,19 @@ class Curve(goocanvas.ItemSimple, goocanvas.Item, View, Zoomable):
                 cr.set_source_rgb(1, 1, 1)
                 cr.stroke()
 
+                x, y = self.keyframes[self._focused_kf]
+                x += KW_LABEL_X_OFFSET
+                y += KW_LABEL_Y_OFFSET
+                text = self.interpolator.formatValue(self._focused_kf.value)
+                w, h = cr.text_extents("0" * len(text))[2:4]
+
+                roundedrec(cr, x - KW_LABEL_HPAD2, y - KW_LABEL_VPAD2, 
+                    w + KW_LABEL_HPAD, h + KW_LABEL_VPAD, r=10)
+                cr.fill()
+                cr.set_source_rgb(1, 0, 0)
+                cr.move_to(x, y + h)
+                cr.show_text(text)
+
     def make_curve(self, cr):
         if not self.interpolator:
             return