first draft watermark on flex plot

rowers/interactiveplots.py

@@ -25,6 +25,8 @@ from bokeh.models import (
     SaveTool,	ResizeTool, ResetTool, TapTool,CrosshairTool,BoxZoomTool,
     Span, Label
 )
+from bokeh.models.glyphs import ImageURL
+
 #from bokeh.models.widgets import Slider, Select, TextInput
 from bokeh.core.properties import value
 
@@ -1326,6 +1328,28 @@ def interactive_flex_chart2(id=0,promember=0,
 		  toolbar_sticky=False
 		  )
 
+
+    url = "/static/img/logo7.png"
+    watermarksource = ColumnDataSource(dict(
+        url = [url],
+        x = [x1mean],
+        y = [y1mean]))
+
+    watermarkrange = Range1d(start=0,end=1)
+    
+    plot.extra_y_ranges = {"watermark": watermarkrange}
+    plot.extra_x_ranges = {"watermark": watermarkrange}
+
+    plot.image_url([url],0.5,0.5,400,74,
+                   global_alpha=0.6,
+                   w_units='screen',
+                   h_units='screen',
+                   anchor='center',
+                   dilate=True,
+                   x_range_name = "watermark",
+                   y_range_name = "watermark",
+                   )
+    
     x1means = Span(location=x1mean,dimension='height',line_color='green',
 		   line_dash=[6,6], line_width=2)
 
@@ -1411,9 +1435,11 @@ def interactive_flex_chart2(id=0,promember=0,
 		minutes = ["%M"]
 	    )
 
+        
     if yparam2 != 'None':
 	yrange2 = Range1d(start=yaxminima[yparam2],end=yaxmaxima[yparam2])
-	plot.extra_y_ranges = {"yax2": yrange2}
+	plot.extra_y_ranges["yax2"] = yrange2
+        #= {"yax2": yrange2}
 
 	if plottype=='line':
 	    plot.line('x1','y2',color="red",y_range_name="yax2",
@@ -1463,7 +1489,8 @@ def interactive_flex_chart2(id=0,promember=0,
                                     y2label=y2label,
                                     xlabel=xlabel,
                                     annolabel=annolabel,
-				    y2means=y2means), code="""
+				    y2means=y2means,
+    ), code="""
        var data = source.data
        var data2 = source2.data
        var x1 = data['x1']