Styling

Style options, such as color, line thickness, and fonts, may be set at the global level (all Schemdraw Drawings), at the Drawing level, or on individual Elements.

Individual Elements

Element styling methods include color, fill, linewidth, and linestyle. If a style method is not called when creating an Element, its value is obtained from from the drawing or global defaults.

Color and fill parameters accept any named SVG color or a hex color string such as ‘#6A5ACD’. Linestyle parameters may be ‘-’, ‘–’, ‘:’, or ‘-.’.

# All elements are blue with lightgray fill unless specified otherwise
d = schemdraw.Drawing(color='blue', fill='lightgray')

d += elm.Diode()
d += elm.Diode().fill('red')        # Fill overrides drawing color here
d += elm.Resistor().fill('purple')  # Fill has no effect on non-closed elements
d += elm.RBox().linestyle('--').color('orange')
d += elm.Resistor().linewidth(5)
../_images/styles_2_01.svg

The label method also accepts color, font, and fontsize parameters, allowing labels with different style as their elements.

Drawing style

Styles may be applied to an entire drawing using the schemdraw.Drawing.config() method. These parameters include color, linewidth, font, fontsize, linestyle, fill, and background color. Additionally, the config method allows specification of the default 2-Terminal element length.

Global style

Styles may be applied to every new drawing created by Schemdraw (during the Python session) using schemdraw.config(), using the same arguments as the Drawing config method.

schemdraw.config(lw=1, font='serif')
with schemdraw.Drawing() as d:
    d += elm.Resistor().label('100KΩ')
    d += elm.Capacitor().down().label('0.1μF', loc='bottom')
    d += elm.Line().left()
    d += elm.Ground()
    d += elm.SourceV().up().label('10V')
../_images/styles_3_0.svg

Global Element Configuration

The schemdraw.elements.Element.style() can be used to configure styles on individual element classes that apply to all Drawings. It may be used, for example, to fill all Diode elements by default, without requiring the fill() method on every Diode instance.

Its argument is a dictionary of {name: Element} class pairs. Combined with functools.partial from the standard library, parameters to elements can be set globally. For example, the following code fills all Diode elements:

from functools import partial

elm.style({'Diode': partial(elm.Diode, fill=True)})

with schemdraw.Drawing() as d:
    d += elm.Diode()
    d += elm.Diode()
../_images/styles_5_0.svg

Be careful, though, because the style method can overwrite existing elements in the namespace.

U.S. versus European Style

The main use of schemdraw.elements.Element.style() is to reconfigure elements in IEEE/U.S. style or IEC/European style. The schemdraw.elements.STYLE_IEC and schemdraw.elements.STYLE_IEEE are dictionaries for use in the style method to change configuration of various elements that use different standard symbols (resistor, variable resistor, photo resistor, etc.)

To configure IEC/European style, use the style method with the elm.STYLE_IEC dictionary.

elm.style(elm.STYLE_IEC)
d += elm.Resistor()
../_images/styles_8_0.svg
elm.style(elm.STYLE_IEEE)
d += elm.Resistor()
../_images/styles_11_0.svg

To see all the elements that change between IEEE and IEC, see Styled Elements.

Themes

Schemdraw also supports themeing, to enable dark mode, for example. The defined themes match those in the Jupyter Themes package:

  • default (black on white)

  • dark (white on black)

  • solarizedd

  • solarizedl

  • onedork

  • oceans16

  • monokai

  • gruvboxl

  • gruvboxd

  • grade3

  • chesterish

They are enabled using schemdraw.theme():

schemdraw.theme('monokai')
with schemdraw.Drawing() as d:
    d += elm.Resistor().label('100KΩ')
    d += elm.Capacitor().down().label('0.1μF', loc='bottom')
    d += elm.Line().left()
    d += elm.Ground()
    d += elm.SourceV().up().label('10V')
../_images/styles_12_0.svg