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#!/usr/bin/env python
#############################################################################
##
# This file is part of Taurus
##
# http://taurus-scada.org
##
# Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
# Taurus is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
##
# Taurus is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
##
# You should have received a copy of the GNU Lesser General Public License
# along with Taurus. If not, see <http://www.gnu.org/licenses/>.
##
#############################################################################
__all__ = ["CurvesPropertiesTool"]
from taurus.external.qt import QtGui, Qt
from taurus.external.qt import QtCore
from taurus.qt.qtcore.configuration import BaseConfigurableClass
from taurus_pyqtgraph.curveproperties import (
get_properties_from_curves,
set_properties_on_curves,
CurvesAppearanceChooser,
)
import pyqtgraph
def _isStepModeSupported():
"""
check if pyqtgraph has left/right stepMode support (introduced in v>0.11.0)
"""
# TODO: to be removed when we bump pyqtgraph dependency to v> 0.11.0
import numpy
x = numpy.arange(4)
y = numpy.arange(3)
c = pyqtgraph.PlotCurveItem(stepMode="__nonexisting_step_mode__")
try:
c.generatePath(x, y)
except ValueError:
# will raise ValueError if
# https://github.com/pyqtgraph/pyqtgraph/pull/1360 is implemented
return True
return False
class CurvesPropertiesTool(QtGui.QAction, BaseConfigurableClass):
"""
This tool inserts an action in the menu of the :class:`pyqtgraph.PlotItem`
to which it is attached to show a dialog for editing curve properties.
It is implemented as an Action, and provides a method to attach it to a
PlotItem.
"""
autoApply = False
def __init__(self, parent=None):
BaseConfigurableClass.__init__(self)
QtGui.QAction.__init__(self, "Plot configuration", parent)
self.triggered.connect(self._onTriggered)
self.plot_item = None
self.Y2Axis = None
self.registerConfigProperty(
self._getCurveAppearanceProperties,
self._setCurveAppearanceProperties,
"CurveProperties",
)
self.registerConfigProperty(
self._getBackgroundColor,
self._setBackgroundColor,
"PlotBackground",
)
def _getBackgroundColor(self):
try:
return self.plot_item.scene().parent().backgroundBrush().color()
except Exception:
import taurus
taurus.debug("Cannot get plot background. Revert to 'default'")
return "default"
def _setBackgroundColor(self, color):
self.plot_item.scene().parent().setBackground(color)
def attachToPlotItem(self, plot_item, y2=None):
"""
Use this method to add this tool to a plot
:param plot_item: (PlotItem)
:param y2: (Y2ViewBox) instance of the Y2Viewbox attached to plot_item
if the axis change controls are to be used
"""
self.plot_item = plot_item
menu = plot_item.getViewBox().menu
menu.addAction(self)
self.Y2Axis = y2
def _onTriggered(self):
props = self._getCurveAppearanceProperties()
curves = self.getModifiableItems()
dlg = Qt.QDialog(parent=self.parent())
dlg.setWindowTitle("Plot Configuration")
layout = Qt.QVBoxLayout()
w = CurvesAppearanceChooser(
parent=dlg,
curvePropDict=props,
curvesDict=curves,
showButtons=True,
autoApply=self.autoApply,
plotItem=self.plot_item,
Y2Axis=self.Y2Axis,
)
if not _isStepModeSupported():
w.stepModeCB.setEnabled(False)
layout.addWidget(w)
dlg.setLayout(layout)
dlg.exec_()
def getModifiableItems(self):
"""
Return a list of curves in the plotItem to which this tool is attached
and which properties are modifiable with this tool. It ignores those
curves that define `._UImodifiable=False`
"""
data_items = self.plot_item.listDataItems()
# checks in all ViewBoxes from plot_item,
# looking for data_items (Curves).
for item in self.plot_item.scene().items():
if isinstance(item, pyqtgraph.ViewBox):
for data in item.addedItems:
if data not in data_items:
data_items.append(data)
# The dialog will ignore curves that define `._UImodifiable=False`
modifiable_items = {}
for item in data_items:
if getattr(item, "_UImodifiable", True):
modifiable_items[item.name()] = item
return modifiable_items
def _getCurveAppearanceProperties(self):
return get_properties_from_curves(self.getModifiableItems())
def _setCurveAppearanceProperties(self, props):
curves = self.getModifiableItems()
set_properties_on_curves(
props, curves, plotItem=self.plot_item, y2Axis=self.Y2Axis
)
if __name__ == "__main__":
import sys
import numpy
import pyqtgraph as pg
from taurus_pyqtgraph import TaurusPlotDataItem
from taurus.qt.qtgui.application import TaurusApplication
app = TaurusApplication()
# a standard pyqtgraph plot_item
w = pg.PlotWidget()
# add legend to the plot, for that we have to give a name to plot items
w.addLegend()
# add a Y2 axis
from taurus_pyqtgraph import Y2ViewBox
y2ViewBox = Y2ViewBox()
y2ViewBox.attachToPlotItem(w.getPlotItem())
# adding a regular data item (non-taurus)
c1 = pg.PlotDataItem(
name="st plot",
pen=dict(color="y", width=3, style=QtCore.Qt.DashLine),
fillLevel=0.3,
fillBrush="g",
)
c1.setData(numpy.arange(300) / 300.0)
w.addItem(c1)
# adding a taurus data item
c2 = TaurusPlotDataItem(
name="st2 plot", pen="r", symbol="o", symbolSize=10
)
c2.setModel("sys/tg_test/1/wave")
w.addItem(c2)
# attach tool to plot item of the PlotWidget
tool = CurvesPropertiesTool()
tool.attachToPlotItem(w.getPlotItem(), y2=y2ViewBox)
w.show()
# directly trigger the tool
tool.trigger()
sys.exit(app.exec_())
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