Cannot see rectangular black line around the legend

[crazyBaboon]

This happens in both devel and master branches.

I compile and run 'plot_stack.c' in the demos folder. It works fine but I cannot reproduce the black rectangular line around the legends of the plots. I can see, however, the opaque white rectangular box behind the legend text.

[elvismt]

The default is now to not show the black stroke. We still have to implement a function to customize it, but the functionality is already there. If you want it change this line

 priv->rect_stroke_color = SLOPE_COLOR_NULL;

to

 priv->rect_stroke_color = SLOPE_COLOR_BLACK;

in legend.c.

If you want also implement slope_legend_set_stroke_color() to set it.