Use cairo surface directly to show the chart in the canvas

Signed-off-by: Manuel Quiñones <manuq@laptop.org>
Signed-off-by: Agustin Zubiaga <aguzubiaga97@gmail.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/charts.py b/charts.py
index e291d2b..35fc44a 100644
--- a/charts.py
+++ b/charts.py
@@ -32,10 +32,6 @@ CHART_IMAGE = os.path.join("/tmp", "chart.png")
 
 
 class Chart(gobject.GObject):
-
-    __gsignals__ = {
-                  'ready': (gobject.SIGNAL_RUN_FIRST, None, [str])}
-
     def __init__(self, type="vertical", width=600, height=460):
         gobject.GObject.__init__(self)
 
@@ -119,5 +115,7 @@ class Chart(gobject.GObject):
         chart.addDataset(self.dataSet)
         chart.render()
 
+    def as_png(self):
+        # FIXME, don't use a temporal file
         self.surface.write_to_png(CHART_IMAGE)
-        self.emit("ready", CHART_IMAGE)
+        return CHART_IMAGE