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authorPicca Frédéric-Emmanuel <picca@debian.org>2017-10-07 07:59:01 +0200
committerPicca Frédéric-Emmanuel <picca@debian.org>2017-10-07 07:59:01 +0200
commitbfa4dba15485b4192f8bbe13345e9658c97ecf76 (patch)
treefb9c6e5860881fbde902f7cbdbd41dc4a3a9fb5d /silx/gui/plot/LimitsHistory.py
parentf7bdc2acff3c13a6d632c28c4569690ab106eed7 (diff)
New upstream version 0.6.0+dfsg
Diffstat (limited to 'silx/gui/plot/LimitsHistory.py')
-rw-r--r--silx/gui/plot/LimitsHistory.py83
1 files changed, 83 insertions, 0 deletions
diff --git a/silx/gui/plot/LimitsHistory.py b/silx/gui/plot/LimitsHistory.py
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+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2017 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 handling of :class:`PlotWidget` limits history.
+"""
+
+__authors__ = ["T. Vincent"]
+__license__ = "MIT"
+__date__ = "19/07/2017"
+
+
+from .. import qt
+
+
+class LimitsHistory(qt.QObject):
+ """Class handling history of limits of a :class:`PlotWidget`.
+
+ :param PlotWidget parent: The plot widget this object is bound to.
+ """
+
+ def __init__(self, parent):
+ self._history = []
+ super(LimitsHistory, self).__init__(parent)
+ self.setParent(parent)
+
+ def setParent(self, parent):
+ """See :meth:`QObject.setParent`.
+
+ :param PlotWidget parent: The PlotWidget this object is bound to.
+ """
+ self.clear() # Clear history when changing parent
+ super(LimitsHistory, self).setParent(parent)
+
+ def push(self):
+ """Append current limits to the history."""
+ plot = self.parent()
+ xmin, xmax = plot.getXAxis().getLimits()
+ ymin, ymax = plot.getYAxis(axis='left').getLimits()
+ y2min, y2max = plot.getYAxis(axis='right').getLimits()
+ self._history.append((xmin, xmax, ymin, ymax, y2min, y2max))
+
+ def pop(self):
+ """Restore previously limits stored in the history.
+
+ :return: True if limits were restored, False if history was empty.
+ :rtype: bool
+ """
+ plot = self.parent()
+ if self._history:
+ limits = self._history.pop(-1)
+ plot.setLimits(*limits)
+ return True
+ else:
+ plot.resetZoom()
+ return False
+
+ def clear(self):
+ """Clear stored limits states."""
+ self._history = []
+
+ def __len__(self):
+ return len(self._history)