Source code for silx.gui.plot._utils

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"""Miscellaneous utility functions for the Plot"""

__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "21/03/2017"


import numpy

from .panzoom import FLOAT32_SAFE_MIN, FLOAT32_MINPOS, FLOAT32_SAFE_MAX
from .panzoom import applyZoomToPlot, applyPan, checkAxisLimits, EnabledAxes


[docs] def addMarginsToLimits( margins, isXLog, isYLog, xMin, xMax, yMin, yMax, y2Min=None, y2Max=None ): """Returns updated limits by extending them with margins. :param margins: The ratio of the margins to add or None for no margins. :type margins: A 4-tuple of floats as (xMinMargin, xMaxMargin, yMinMargin, yMaxMargin) :return: The updated limits :rtype: tuple of 4 or 6 floats: Either (xMin, xMax, yMin, yMax) or (xMin, xMax, yMin, yMax, y2Min, y2Max) if y2Min and y2Max are provided. """ if margins is not None: xMinMargin, xMaxMargin, yMinMargin, yMaxMargin = margins if not isXLog: xRange = xMax - xMin xMin -= xMinMargin * xRange xMax += xMaxMargin * xRange elif xMin > 0.0 and xMax > 0.0: # Log scale # Do not apply margins if limits < 0 xMinLog, xMaxLog = numpy.log10(xMin), numpy.log10(xMax) xRangeLog = xMaxLog - xMinLog xMin = pow(10.0, xMinLog - xMinMargin * xRangeLog) xMax = pow(10.0, xMaxLog + xMaxMargin * xRangeLog) if not isYLog: yRange = yMax - yMin yMin -= yMinMargin * yRange yMax += yMaxMargin * yRange elif yMin > 0.0 and yMax > 0.0: # Log scale # Do not apply margins if limits < 0 yMinLog, yMaxLog = numpy.log10(yMin), numpy.log10(yMax) yRangeLog = yMaxLog - yMinLog yMin = pow(10.0, yMinLog - yMinMargin * yRangeLog) yMax = pow(10.0, yMaxLog + yMaxMargin * yRangeLog) if y2Min is not None and y2Max is not None: if not isYLog: yRange = y2Max - y2Min y2Min -= yMinMargin * yRange y2Max += yMaxMargin * yRange elif y2Min > 0.0 and y2Max > 0.0: # Log scale # Do not apply margins if limits < 0 yMinLog, yMaxLog = numpy.log10(y2Min), numpy.log10(y2Max) yRangeLog = yMaxLog - yMinLog y2Min = pow(10.0, yMinLog - yMinMargin * yRangeLog) y2Max = pow(10.0, yMaxLog + yMaxMargin * yRangeLog) if y2Min is None or y2Max is None: return xMin, xMax, yMin, yMax else: return xMin, xMax, yMin, yMax, y2Min, y2Max