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Diffstat (limited to 'silx/gui/plot/items/axis.py')
| -rw-r--r-- | silx/gui/plot/items/axis.py | 569 |
1 files changed, 0 insertions, 569 deletions
diff --git a/silx/gui/plot/items/axis.py b/silx/gui/plot/items/axis.py deleted file mode 100644 index be85e6a..0000000 --- a/silx/gui/plot/items/axis.py +++ /dev/null @@ -1,569 +0,0 @@ -# coding: utf-8 -# /*########################################################################## -# -# Copyright (c) 2017-2020 European Synchrotron Radiation Facility -# -# Permission is hereby granted, free of charge, to any person obtaining a copy -# of this software and associated documentation files (the "Software"), to deal -# in the Software without restriction, including without limitation the rights -# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -# copies of the Software, and to permit persons to whom the Software is -# furnished to do so, subject to the following conditions: -# -# The above copyright notice and this permission notice shall be included in -# all copies or substantial portions of the Software. -# -# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -# THE SOFTWARE. -# -# ###########################################################################*/ -"""This module provides the class for axes of the :class:`PlotWidget`. -""" - -__authors__ = ["V. Valls"] -__license__ = "MIT" -__date__ = "22/11/2018" - -import datetime as dt -import enum -import logging - -import dateutil.tz - -from ... import qt - - -_logger = logging.getLogger(__name__) - - -class TickMode(enum.Enum): - """Determines if ticks are regular number or datetimes.""" - DEFAULT = 0 # Ticks are regular numbers - TIME_SERIES = 1 # Ticks are datetime objects - - -class Axis(qt.QObject): - """This class describes and controls a plot axis. - - Note: This is an abstract class. - """ - # States are half-stored on the backend of the plot, and half-stored on this - # object. - # TODO It would be good to store all the states of an axis in this object. - # i.e. vmin and vmax - - LINEAR = "linear" - """Constant defining a linear scale""" - - LOGARITHMIC = "log" - """Constant defining a logarithmic scale""" - - _SCALES = set([LINEAR, LOGARITHMIC]) - - sigInvertedChanged = qt.Signal(bool) - """Signal emitted when axis orientation has changed""" - - sigScaleChanged = qt.Signal(str) - """Signal emitted when axis scale has changed""" - - _sigLogarithmicChanged = qt.Signal(bool) - """Signal emitted when axis scale has changed to or from logarithmic""" - - sigAutoScaleChanged = qt.Signal(bool) - """Signal emitted when axis autoscale has changed""" - - sigLimitsChanged = qt.Signal(float, float) - """Signal emitted when axis limits have changed""" - - def __init__(self, plot): - """Constructor - - :param silx.gui.plot.PlotWidget.PlotWidget plot: Parent plot of this - axis - """ - qt.QObject.__init__(self, parent=plot) - self._scale = self.LINEAR - self._isAutoScale = True - # Store default labels provided to setGraph[X|Y]Label - self._defaultLabel = '' - # Store currently displayed labels - # Current label can differ from input one with active curve handling - self._currentLabel = '' - - def _getPlot(self): - """Returns the PlotWidget this Axis belongs to. - - :rtype: PlotWidget - """ - plot = self.parent() - if plot is None: - raise RuntimeError("Axis no longer attached to a PlotWidget") - return plot - - def _getBackend(self): - """Returns the backend - - :rtype: BackendBase - """ - return self._getPlot()._backend - - def getLimits(self): - """Get the limits of this axis. - - :return: Minimum and maximum values of this axis as tuple - """ - return self._internalGetLimits() - - def setLimits(self, vmin, vmax): - """Set this axis limits. - - :param float vmin: minimum axis value - :param float vmax: maximum axis value - """ - vmin, vmax = self._checkLimits(vmin, vmax) - if self.getLimits() == (vmin, vmax): - return - - self._internalSetLimits(vmin, vmax) - self._getPlot()._setDirtyPlot() - - self._emitLimitsChanged() - - def _emitLimitsChanged(self): - """Emit axis sigLimitsChanged and PlotWidget limitsChanged event""" - vmin, vmax = self.getLimits() - self.sigLimitsChanged.emit(vmin, vmax) - self._getPlot()._notifyLimitsChanged(emitSignal=False) - - def _checkLimits(self, vmin, vmax): - """Makes sure axis range is not empty - - :param float vmin: Min axis value - :param float vmax: Max axis value - :return: (min, max) making sure min < max - :rtype: 2-tuple of float - """ - if vmax < vmin: - _logger.debug('%s axis: max < min, inverting limits.', self._defaultLabel) - vmin, vmax = vmax, vmin - elif vmax == vmin: - _logger.debug('%s axis: max == min, expanding limits.', self._defaultLabel) - if vmin == 0.: - vmin, vmax = -0.1, 0.1 - elif vmin < 0: - vmin, vmax = vmin * 1.1, vmin * 0.9 - else: # xmin > 0 - vmin, vmax = vmin * 0.9, vmin * 1.1 - - return vmin, vmax - - def isInverted(self): - """Return True if the axis is inverted (top to bottom for the y-axis), - False otherwise. It is always False for the X axis. - - :rtype: bool - """ - return False - - def setInverted(self, isInverted): - """Set the axis orientation. - - This is only available for the Y axis. - - :param bool flag: True for Y axis going from top to bottom, - False for Y axis going from bottom to top - """ - if isInverted == self.isInverted(): - return - raise NotImplementedError() - - def getLabel(self): - """Return the current displayed label of this axis. - - :param str axis: The Y axis for which to get the label (left or right) - :rtype: str - """ - return self._currentLabel - - def setLabel(self, label): - """Set the label displayed on the plot for this axis. - - The provided label can be temporarily replaced by the label of the - active curve if any. - - :param str label: The axis label - """ - self._defaultLabel = label - self._setCurrentLabel(label) - self._getPlot()._setDirtyPlot() - - def _setCurrentLabel(self, label): - """Define the label currently displayed. - - If the label is None or empty the default label is used. - - :param str label: Currently displayed label - """ - if label is None or label == '': - label = self._defaultLabel - if label is None: - label = '' - self._currentLabel = label - self._internalSetCurrentLabel(label) - - def getScale(self): - """Return the name of the scale used by this axis. - - :rtype: str - """ - return self._scale - - def setScale(self, scale): - """Set the scale to be used by this axis. - - :param str scale: Name of the scale ("log", or "linear") - """ - assert(scale in self._SCALES) - if self._scale == scale: - return - - # For the backward compatibility signal - emitLog = self._scale == self.LOGARITHMIC or scale == self.LOGARITHMIC - - self._scale = scale - - # TODO hackish way of forcing update of curves and images - plot = self._getPlot() - for item in plot.getItems(): - item._updated() - plot._invalidateDataRange() - - if scale == self.LOGARITHMIC: - self._internalSetLogarithmic(True) - elif scale == self.LINEAR: - self._internalSetLogarithmic(False) - else: - raise ValueError("Scale %s unsupported" % scale) - - plot._forceResetZoom() - - self.sigScaleChanged.emit(self._scale) - if emitLog: - self._sigLogarithmicChanged.emit(self._scale == self.LOGARITHMIC) - - def _isLogarithmic(self): - """Return True if this axis scale is logarithmic, False if linear. - - :rtype: bool - """ - return self._scale == self.LOGARITHMIC - - def _setLogarithmic(self, flag): - """Set the scale of this axes (either linear or logarithmic). - - :param bool flag: True to use a logarithmic scale, False for linear. - """ - flag = bool(flag) - self.setScale(self.LOGARITHMIC if flag else self.LINEAR) - - def getTimeZone(self): - """Sets tzinfo that is used if this axis plots date times. - - None means the datetimes are interpreted as local time. - - :rtype: datetime.tzinfo of None. - """ - raise NotImplementedError() - - def setTimeZone(self, tz): - """Sets tzinfo that is used if this axis' tickMode is TIME_SERIES - - The tz must be a descendant of the datetime.tzinfo class, "UTC" or None. - Use None to let the datetimes be interpreted as local time. - Use the string "UTC" to let the date datetimes be in UTC time. - - :param tz: datetime.tzinfo, "UTC" or None. - """ - raise NotImplementedError() - - def getTickMode(self): - """Determines if axis ticks are number or datetimes. - - :rtype: TickMode enum. - """ - raise NotImplementedError() - - def setTickMode(self, tickMode): - """Determines if axis ticks are number or datetimes. - - :param TickMode tickMode: tick mode enum. - """ - raise NotImplementedError() - - def isAutoScale(self): - """Return True if axis is automatically adjusting its limits. - - :rtype: bool - """ - return self._isAutoScale - - def setAutoScale(self, flag=True): - """Set the axis limits adjusting behavior of :meth:`resetZoom`. - - :param bool flag: True to resize limits automatically, - False to disable it. - """ - self._isAutoScale = bool(flag) - self.sigAutoScaleChanged.emit(self._isAutoScale) - - def _setLimitsConstraints(self, minPos=None, maxPos=None): - raise NotImplementedError() - - def setLimitsConstraints(self, minPos=None, maxPos=None): - """ - Set a constraint on the position of the axes. - - :param float minPos: Minimum allowed axis value. - :param float maxPos: Maximum allowed axis value. - :return: True if the constaints was updated - :rtype: bool - """ - updated = self._setLimitsConstraints(minPos, maxPos) - if updated: - plot = self._getPlot() - xMin, xMax = plot.getXAxis().getLimits() - yMin, yMax = plot.getYAxis().getLimits() - y2Min, y2Max = plot.getYAxis('right').getLimits() - plot.setLimits(xMin, xMax, yMin, yMax, y2Min, y2Max) - return updated - - def _setRangeConstraints(self, minRange=None, maxRange=None): - raise NotImplementedError() - - def setRangeConstraints(self, minRange=None, maxRange=None): - """ - Set a constraint on the position of the axes. - - :param float minRange: Minimum allowed left-to-right span across the - view - :param float maxRange: Maximum allowed left-to-right span across the - view - :return: True if the constaints was updated - :rtype: bool - """ - updated = self._setRangeConstraints(minRange, maxRange) - if updated: - plot = self._getPlot() - xMin, xMax = plot.getXAxis().getLimits() - yMin, yMax = plot.getYAxis().getLimits() - y2Min, y2Max = plot.getYAxis('right').getLimits() - plot.setLimits(xMin, xMax, yMin, yMax, y2Min, y2Max) - return updated - - -class XAxis(Axis): - """Axis class defining primitives for the X axis""" - - # TODO With some changes on the backend, it will be able to remove all this - # specialised implementations (prefixel by '_internal') - - def getTimeZone(self): - return self._getBackend().getXAxisTimeZone() - - def setTimeZone(self, tz): - if isinstance(tz, str) and tz.upper() == "UTC": - tz = dateutil.tz.tzutc() - elif not(tz is None or isinstance(tz, dt.tzinfo)): - raise TypeError("tz must be a dt.tzinfo object, None or 'UTC'.") - - self._getBackend().setXAxisTimeZone(tz) - self._getPlot()._setDirtyPlot() - - def getTickMode(self): - if self._getBackend().isXAxisTimeSeries(): - return TickMode.TIME_SERIES - else: - return TickMode.DEFAULT - - def setTickMode(self, tickMode): - if tickMode == TickMode.DEFAULT: - self._getBackend().setXAxisTimeSeries(False) - elif tickMode == TickMode.TIME_SERIES: - self._getBackend().setXAxisTimeSeries(True) - else: - raise ValueError("Unexpected TickMode: {}".format(tickMode)) - - def _internalSetCurrentLabel(self, label): - self._getBackend().setGraphXLabel(label) - - def _internalGetLimits(self): - return self._getBackend().getGraphXLimits() - - def _internalSetLimits(self, xmin, xmax): - self._getBackend().setGraphXLimits(xmin, xmax) - - def _internalSetLogarithmic(self, flag): - self._getBackend().setXAxisLogarithmic(flag) - - def _setLimitsConstraints(self, minPos=None, maxPos=None): - constrains = self._getPlot()._getViewConstraints() - updated = constrains.update(xMin=minPos, xMax=maxPos) - return updated - - def _setRangeConstraints(self, minRange=None, maxRange=None): - constrains = self._getPlot()._getViewConstraints() - updated = constrains.update(minXRange=minRange, maxXRange=maxRange) - return updated - - -class YAxis(Axis): - """Axis class defining primitives for the Y axis""" - - # TODO With some changes on the backend, it will be able to remove all this - # specialised implementations (prefixel by '_internal') - - def _internalSetCurrentLabel(self, label): - self._getBackend().setGraphYLabel(label, axis='left') - - def _internalGetLimits(self): - return self._getBackend().getGraphYLimits(axis='left') - - def _internalSetLimits(self, ymin, ymax): - self._getBackend().setGraphYLimits(ymin, ymax, axis='left') - - def _internalSetLogarithmic(self, flag): - self._getBackend().setYAxisLogarithmic(flag) - - def setInverted(self, flag=True): - """Set the axis orientation. - - This is only available for the Y axis. - - :param bool flag: True for Y axis going from top to bottom, - False for Y axis going from bottom to top - """ - flag = bool(flag) - if self.isInverted() == flag: - return - self._getBackend().setYAxisInverted(flag) - self._getPlot()._setDirtyPlot() - self.sigInvertedChanged.emit(flag) - - def isInverted(self): - """Return True if the axis is inverted (top to bottom for the y-axis), - False otherwise. It is always False for the X axis. - - :rtype: bool - """ - return self._getBackend().isYAxisInverted() - - def _setLimitsConstraints(self, minPos=None, maxPos=None): - constrains = self._getPlot()._getViewConstraints() - updated = constrains.update(yMin=minPos, yMax=maxPos) - return updated - - def _setRangeConstraints(self, minRange=None, maxRange=None): - constrains = self._getPlot()._getViewConstraints() - updated = constrains.update(minYRange=minRange, maxYRange=maxRange) - return updated - - -class YRightAxis(Axis): - """Proxy axis for the secondary Y axes. It manages it own label and limit - but share the some state like scale and direction with the main axis.""" - - # TODO With some changes on the backend, it will be able to remove all this - # specialised implementations (prefixel by '_internal') - - def __init__(self, plot, mainAxis): - """Constructor - - :param silx.gui.plot.PlotWidget.PlotWidget plot: Parent plot of this - axis - :param Axis mainAxis: Axis which sharing state with this axis - """ - Axis.__init__(self, plot) - self.__mainAxis = mainAxis - - @property - def sigInvertedChanged(self): - """Signal emitted when axis orientation has changed""" - return self.__mainAxis.sigInvertedChanged - - @property - def sigScaleChanged(self): - """Signal emitted when axis scale has changed""" - return self.__mainAxis.sigScaleChanged - - @property - def _sigLogarithmicChanged(self): - """Signal emitted when axis scale has changed to or from logarithmic""" - return self.__mainAxis._sigLogarithmicChanged - - @property - def sigAutoScaleChanged(self): - """Signal emitted when axis autoscale has changed""" - return self.__mainAxis.sigAutoScaleChanged - - def _internalSetCurrentLabel(self, label): - self._getBackend().setGraphYLabel(label, axis='right') - - def _internalGetLimits(self): - return self._getBackend().getGraphYLimits(axis='right') - - def _internalSetLimits(self, ymin, ymax): - self._getBackend().setGraphYLimits(ymin, ymax, axis='right') - - def setInverted(self, flag=True): - """Set the Y axis orientation. - - :param bool flag: True for Y axis going from top to bottom, - False for Y axis going from bottom to top - """ - return self.__mainAxis.setInverted(flag) - - def isInverted(self): - """Return True if Y axis goes from top to bottom, False otherwise.""" - return self.__mainAxis.isInverted() - - def getScale(self): - """Return the name of the scale used by this axis. - - :rtype: str - """ - return self.__mainAxis.getScale() - - def setScale(self, scale): - """Set the scale to be used by this axis. - - :param str scale: Name of the scale ("log", or "linear") - """ - self.__mainAxis.setScale(scale) - - def _isLogarithmic(self): - """Return True if Y axis scale is logarithmic, False if linear.""" - return self.__mainAxis._isLogarithmic() - - def _setLogarithmic(self, flag): - """Set the Y axes scale (either linear or logarithmic). - - :param bool flag: True to use a logarithmic scale, False for linear. - """ - return self.__mainAxis._setLogarithmic(flag) - - def isAutoScale(self): - """Return True if Y axes are automatically adjusting its limits.""" - return self.__mainAxis.isAutoScale() - - def setAutoScale(self, flag=True): - """Set the Y axis limits adjusting behavior of :meth:`PlotWidget.resetZoom`. - - :param bool flag: True to resize limits automatically, - False to disable it. - """ - return self.__mainAxis.setAutoScale(flag) |