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+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2016-2018 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.
+#
+# ###########################################################################*/
+"""A toolbar to display and edit limits of a PlotWidget
+"""
+
+
+from __future__ import division
+
+__authors__ = ["V.A. Sole", "T. Vincent"]
+__license__ = "MIT"
+__date__ = "16/10/2017"
+
+
+from ... import qt
+from ...widgets.FloatEdit import FloatEdit
+
+
+class LimitsToolBar(qt.QToolBar):
+ """QToolBar displaying and controlling the limits of a :class:`PlotWidget`.
+
+ To run the following sample code, a QApplication must be initialized.
+ First, create a PlotWindow:
+
+ >>> from silx.gui.plot import PlotWindow
+ >>> plot = PlotWindow() # Create a PlotWindow to add the toolbar to
+
+ Then, create the LimitsToolBar and add it to the PlotWindow.
+
+ >>> from silx.gui import qt
+ >>> from silx.gui.plot.tools import LimitsToolBar
+
+ >>> toolbar = LimitsToolBar(plot=plot) # Create the toolbar
+ >>> plot.addToolBar(qt.Qt.BottomToolBarArea, toolbar) # Add it to the plot
+ >>> plot.show() # To display the PlotWindow with the limits toolbar
+
+ :param parent: See :class:`QToolBar`.
+ :param plot: :class:`PlotWidget` instance on which to operate.
+ :param str title: See :class:`QToolBar`.
+ """
+
+ def __init__(self, parent=None, plot=None, title='Limits'):
+ super(LimitsToolBar, self).__init__(title, parent)
+ assert plot is not None
+ self._plot = plot
+ self._plot.sigPlotSignal.connect(self._plotWidgetSlot)
+
+ self._initWidgets()
+
+ @property
+ def plot(self):
+ """The :class:`PlotWidget` the toolbar is attached to."""
+ return self._plot
+
+ def _initWidgets(self):
+ """Create and init Toolbar widgets."""
+ xMin, xMax = self.plot.getXAxis().getLimits()
+ yMin, yMax = self.plot.getYAxis().getLimits()
+
+ self.addWidget(qt.QLabel('Limits: '))
+ self.addWidget(qt.QLabel(' X: '))
+ self._xMinFloatEdit = FloatEdit(self, xMin)
+ self._xMinFloatEdit.editingFinished[()].connect(
+ self._xFloatEditChanged)
+ self.addWidget(self._xMinFloatEdit)
+
+ self._xMaxFloatEdit = FloatEdit(self, xMax)
+ self._xMaxFloatEdit.editingFinished[()].connect(
+ self._xFloatEditChanged)
+ self.addWidget(self._xMaxFloatEdit)
+
+ self.addWidget(qt.QLabel(' Y: '))
+ self._yMinFloatEdit = FloatEdit(self, yMin)
+ self._yMinFloatEdit.editingFinished[()].connect(
+ self._yFloatEditChanged)
+ self.addWidget(self._yMinFloatEdit)
+
+ self._yMaxFloatEdit = FloatEdit(self, yMax)
+ self._yMaxFloatEdit.editingFinished[()].connect(
+ self._yFloatEditChanged)
+ self.addWidget(self._yMaxFloatEdit)
+
+ def _plotWidgetSlot(self, event):
+ """Listen to :class:`PlotWidget` events."""
+ if event['event'] not in ('limitsChanged',):
+ return
+
+ xMin, xMax = self.plot.getXAxis().getLimits()
+ yMin, yMax = self.plot.getYAxis().getLimits()
+
+ self._xMinFloatEdit.setValue(xMin)
+ self._xMaxFloatEdit.setValue(xMax)
+ self._yMinFloatEdit.setValue(yMin)
+ self._yMaxFloatEdit.setValue(yMax)
+
+ def _xFloatEditChanged(self):
+ """Handle X limits changed from the GUI."""
+ xMin, xMax = self._xMinFloatEdit.value(), self._xMaxFloatEdit.value()
+ if xMax < xMin:
+ xMin, xMax = xMax, xMin
+
+ self.plot.getXAxis().setLimits(xMin, xMax)
+
+ def _yFloatEditChanged(self):
+ """Handle Y limits changed from the GUI."""
+ yMin, yMax = self._yMinFloatEdit.value(), self._yMaxFloatEdit.value()
+ if yMax < yMin:
+ yMin, yMax = yMax, yMin
+
+ self.plot.getYAxis().setLimits(yMin, yMax)