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# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 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.
#
# ###########################################################################*/
"""This example illustrates the use of :class:`CurveLegendsWidget`.
:class:`CurveLegendsWidget` display curves style and legend currently visible
in a :class:`~silx.gui.plot.PlotWidget`
"""
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "20/07/2018"
import functools
import numpy
from silx.gui import qt
from silx.gui.plot import Plot1D
from silx.gui.plot.tools.CurveLegendsWidget import CurveLegendsWidget
from silx.gui.widgets.BoxLayoutDockWidget import BoxLayoutDockWidget
class MyCurveLegendsWidget(CurveLegendsWidget):
"""Extension of CurveLegendWidget.
This widget adds:
- Set a curve as active with a left click its the legend
- Adds a context menu with content specific to the hovered legend
:param QWidget parent: See QWidget
"""
def __init__(self, parent=None):
super(MyCurveLegendsWidget, self).__init__(parent)
# Activate/Deactivate curve with left click on the legend widget
self.sigCurveClicked.connect(self._switchCurveActive)
# Add a custom context menu
self.setContextMenuPolicy(qt.Qt.CustomContextMenu)
self.customContextMenuRequested.connect(self._contextMenu)
def _switchCurveActive(self, curve):
"""Set a curve as active.
This is called from the context menu and when a legend is clicked.
:param silx.gui.plot.items.Curve curve:
"""
plot = curve.getPlot()
plot.setActiveCurve(
curve.getLegend() if curve != plot.getActiveCurve() else None)
def _switchCurveVisibility(self, curve):
"""Toggle the visibility of a curve
:param silx.gui.plot.items.Curve curve:
"""
curve.setVisible(not curve.isVisible())
def _switchCurveYAxis(self, curve):
"""Change the Y axis a curve is attached to.
:param silx.gui.plot.items.Curve curve:
"""
yaxis = curve.getYAxis()
curve.setYAxis('left' if yaxis is 'right' else 'right')
def _contextMenu(self, pos):
"""Create a show the context menu.
:param QPoint pos: Position in this widget
"""
curve = self.curveAt(pos) # Retrieve curve from hovered legend
if curve is not None:
menu = qt.QMenu() # Create the menu
# Add an action to activate the curve
activeCurve = curve.getPlot().getActiveCurve()
menu.addAction('Unselect' if curve == activeCurve else 'Select',
functools.partial(self._switchCurveActive, curve))
# Add an action to switch the Y axis of a curve
yaxis = 'right' if curve.getYAxis() == 'left' else 'left'
menu.addAction('Map to %s' % yaxis,
functools.partial(self._switchCurveYAxis, curve))
# Add an action to show/hide the curve
menu.addAction('Hide' if curve.isVisible() else 'Show',
functools.partial(self._switchCurveVisibility, curve))
globalPosition = self.mapToGlobal(pos)
menu.exec_(globalPosition)
# First create the QApplication
app = qt.QApplication([])
# Create a plot and add some curves
window = Plot1D()
window.setWindowTitle("CurveLegendWidgets demo")
x = numpy.linspace(-numpy.pi, numpy.pi, 100)
window.addCurve(x, 2. * numpy.random.random(100) - 1.,
legend='random',
symbol='s', linestyle='--',
color='red')
window.addCurve(x, numpy.sin(x),
legend='sin',
symbol='o', linestyle=':',
color='blue')
window.addCurve(x, numpy.cos(x),
legend='cos',
symbol='', linestyle='-',
color='blue')
# Create a MyCurveLegendWidget associated to the plot
curveLegendsWidget = MyCurveLegendsWidget()
curveLegendsWidget.setPlotWidget(window)
# Add the CurveLegendsWidget as a dock widget to the plot
dock = BoxLayoutDockWidget()
dock.setWindowTitle('Curve legends')
dock.setWidget(curveLegendsWidget)
window.addDockWidget(qt.Qt.RightDockWidgetArea, dock)
# Show the plot and run the QApplication
window.setAttribute(qt.Qt.WA_DeleteOnClose)
window.show()
app.exec_()
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