ENH: Make plot span 100% of browser width by default

Author: kernc

backtesting/_plotting.py

@@ -69,7 +69,7 @@ def lightness(color, lightness=.94):
     return color.to_rgb()
 
 
-def plot(*, results, df, indicators, filename='', plot_width=1200,
+def plot(*, results, df, indicators, filename='', plot_width=None,
          plot_equity=True, plot_pl=True,
          plot_volume=True, plot_drawdown=False,
          smooth_equity=False, relative_equity=True, omit_missing=True,
@@ -550,13 +550,17 @@ def __eq__(self, other):
         wheelzoom_tool = next(wz for wz in f.tools if isinstance(wz, WheelZoomTool))
         wheelzoom_tool.maintain_focus = False
 
+    kwargs = {}
+    if plot_width is None:
+        kwargs['sizing_mode'] = 'stretch_width'
+
     fig = gridplot(
         plots,
         ncols=1,
         toolbar_location='right',
-        # sizing_mode='stretch_width',
         toolbar_options=dict(logo=None),
         merge_tools=True,
+        **kwargs
     )
     show(fig, browser=None if open_browser else 'none')
     return fig

backtesting/backtesting.py

@@ -934,7 +934,7 @@ def _round_timedelta(value, _period=_data_period(df)):
         s._trade_data = df  # Private API
         return s
 
-    def plot(self, *, results: pd.Series = None, filename=None, plot_width=1200,
+    def plot(self, *, results: pd.Series = None, filename=None, plot_width=None,
              plot_equity=True, plot_pl=True,
              plot_volume=True, plot_drawdown=False,
              smooth_equity=False, relative_equity=True,
@@ -953,11 +953,10 @@ def plot(self, *, results: pd.Series = None, filename=None, plot_width=1200,
         By default, a strategy/parameter-dependent file is created in the
         current working directory.
 
-        `plot_width` is the width of the plot in pixels. The height is
+        `plot_width` is the width of the plot in pixels. If None (default),
+        the plot is made to span 100% of browser width. The height is
         currently non-adjustable.
 
-        .. TODO:: Make Bokeh plot span 100% browser width by default.
-
         If `plot_equity` is `True`, the resulting plot will contain
         an equity (cash plus assets) graph section.
 

setup.py

@@ -33,7 +33,7 @@
             'typing ; python_version < "3.5"',
             'numpy',
             'pandas >= 0.21.0, != 0.25.0',
-            'bokeh >= 0.12.15',
+            'bokeh >= 1.1.0',
         ],
         extras_require={
             'doc': [