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Implement 'unit' property #34

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Implement 'unit' property #34

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da11dd8
Implement 'unit' property
Matrx007 Aug 10, 2022
737b320
Improve documentation wording
Matrx007 Aug 10, 2022
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26 changes: 23 additions & 3 deletions kivy_garden/graph/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -337,6 +337,7 @@ def _update_labels(self):
ymax = self.ymax
xmin = self.xmin
precision = self.precision
unit = self.unit
x_overlap = False
y_overlap = False
# set up x and y axis labels
Expand Down Expand Up @@ -392,19 +393,25 @@ def _update_labels(self):
funcexp = exp10 if self.xlog else identity
funclog = log10 if self.xlog else identity
# find the distance from the end that'll fit the last tick label
xlabels[0].text = precision % funcexp(xpoints[-1])
xlabels[0].text = precision % (
funcexp(xpoints[-1]) / (unit if unit != 0 else 1) + 0
)
xlabels[0].texture_update()
xextent = x + width - xlabels[0].texture_size[0] / 2. - padding
# find the distance from the start that'll fit the first tick label
if not x_next:
xlabels[0].text = precision % funcexp(xpoints[0])
xlabels[0].text = precision % (
funcexp(xpoints[0]) / (unit if unit != 0 else 1) + 0
)
xlabels[0].texture_update()
x_next = padding + xlabels[0].texture_size[0] / 2.
xmin = funclog(xmin)
ratio = (xextent - x_next) / float(funclog(self.xmax) - xmin)
right = -1
for k in range(len(xlabels)):
xlabels[k].text = precision % funcexp(xpoints[k])
xlabels[k].text = precision % (
funcexp(xpoints[k]) / (unit if unit != 0 else 1) + 0
)
# update the size so we can center the labels on ticks
xlabels[k].texture_update()
xlabels[k].size = xlabels[k].texture_size
Expand Down Expand Up @@ -785,6 +792,19 @@ def to_data(self, x, y):
to False.
'''

unit = NumericProperty(1)
'''Determines the unit of x-axis values. The distance between the major
tick marks is divided by this number. Setting this to 0 will work as
if it was set to 0 to avoid division by 0. Negative numbers are allowed.

For example, setting this and x_ticks_major to 60 will display x-axis ticks
in minutes (by dividing major ticks by 60), assuming that data rate is once
per second.

:data:`unit` is a :class:`~kivy.properties.NumericProperty`, defaults
to 1.
'''

x_ticks_major = BoundedNumericProperty(0, min=0)
'''Distance between major tick marks on the x-axis.

Expand Down