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#!/usr/bin/env python
# /*##########################################################################
#
# Copyright (c) 2016-2021 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 script is a simple (trivial) example of how to create a :class:`~silx.gui.plot.PlotWindow`,
create a custom :class:`~silx.gui.plot.actions.PlotAction` and add it to the toolbar.
The action simply shifts the selected curve up by 1 unit by adding 1 to each
value of y.
"""
__authors__ = ["P. Knobel"]
__license__ = "MIT"
__date__ = "12/01/2017"
import sys
from silx.gui import qt
from silx.gui.plot import PlotWindow
from silx.gui.plot.actions import PlotAction
class ShiftUpAction(PlotAction):
"""QAction shifting up a curve by one unit
:param plot: :class:`.PlotWidget` instance on which to operate
:param parent: See :class:`QAction`
"""
def __init__(self, plot, parent=None):
PlotAction.__init__(
self,
plot,
icon="shape-circle",
text="Shift up",
tooltip="Shift active curve up by one unit",
triggered=self.shiftActiveCurveUp,
parent=parent,
)
def shiftActiveCurveUp(self):
"""Get the active curve, add 1 to all y values, use this new y
array to replace the original curve"""
# By inheriting from PlotAction, we get access to attribute self.plot
# which is a reference to the PlotWindow
activeCurve = self.plot.getActiveCurve()
if activeCurve is None:
qt.QMessageBox.information(
self.plot, "Shift Curve", "Please select a curve."
)
else:
# Unpack curve data.
# Each curve is represented by an object with methods to access:
# the curve data, its legend, associated information and curve style
# Here we retrieve the x and y data of the curve
x0 = activeCurve.getXData()
y0 = activeCurve.getYData()
# Add 1 to all values in the y array
# and assign the result to a new array y1
y1 = y0 + 1.0
# Set the active curve data with the shifted y values
activeCurve.setData(x0, y1)
# creating QApplication is mandatory in order to use qt widget
app = qt.QApplication([])
sys.excepthook = qt.exceptionHandler
# create a PlotWindow
plotwin = PlotWindow()
# Add a new toolbar
toolbar = qt.QToolBar("My toolbar")
plotwin.addToolBar(toolbar)
# Get a reference to the PlotWindow's menu bar, add a menu
menubar = plotwin.menuBar()
actions_menu = menubar.addMenu("Custom actions")
# Initialize our action, give it plotwin as a parameter
myaction = ShiftUpAction(plotwin)
# Add action to the menubar and toolbar
toolbar.addAction(myaction)
actions_menu.addAction(myaction)
# Plot a couple of curves with synthetic data
x = [0, 1, 2, 3, 4, 5, 6]
y1 = [0, 1, 0, 1, 0, 1, 0]
y2 = [0, 1, 2, 3, 4, 5, 6]
plotwin.addCurve(x, y1, legend="triangle shaped curve")
plotwin.addCurve(x, y2, legend="oblique line")
plotwin.show()
app.exec()
|
