Class Ruler

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Instance Methods

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set_range(lower, upper, position, max_size)
Sets range and current value of a ruler.

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draw_pos()
Draws a position marker.

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get_range(lower, upper, position, max_size)
Retrieves values indicating the range and current position of a Ruler. source code

set_si_unit(units)
Sets the base units a ruler displays.

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get_si_unit()
Returns the base units a ruler uses.

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get_units_placement()
Gets current units placement of ruler ruler. source code

set_units_placement(placement)
Sets whether and where units should be placed on the ruler.

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Method Details

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set_range(lower, upper, position, max_size)

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Sets range and current value of a ruler.

Parameters:

lower - Lower limit of the ruler. (float)
upper - Upper limit of the ruler. (float)
position - Current position of the mark on the ruler. (float)
max_size - Maximum value used for calculating size of text labels. (float)

draw_pos()

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Draws a position marker.

This method is intended primarily for subclass implementation.

get_range(lower, upper, position, max_size)

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Retrieves values indicating the range and current position of a Ruler. See Ruler.set_range().

Parameters:

lower - Location to store lower limit of the ruler, or NULL (float)
upper - Location to store upper limit of the ruler, or NULL (float)
position - Location to store the current position of the mark on the ruler, or NULL (float)
max_size - Location to store the maximum size of the ruler used when calculating the space to leave for the text, or NULL. (float)

set_si_unit(units)

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Sets the base units a ruler displays.

Setting units to NULL effectively disables them.

Parameters:

units - The base units this ruler should display. (SIUnit)

get_si_unit()

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Returns the base units a ruler uses.

Returns:: The units the rules uses.

get_units_placement()

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Gets current units placement of ruler ruler.

Returns:: The units placement.

set_units_placement(placement)

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Sets whether and where units should be placed on the ruler.

Parameters:

placement - Units placement specification. (UnitsPlacement)