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+# /*##########################################################################
+#
+# Copyright (c) 2023 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 an abstract PlotToolButton that can be use to create
+plot tools for a toolbar.
+"""
+
+from __future__ import annotations
+
+__authors__ = ["V. Valls"]
+__license__ = "MIT"
+__date__ = "20/12/2023"
+
+
+import logging
+import weakref
+
+from silx.gui import qt
+
+
+_logger = logging.getLogger(__name__)
+
+
+class PlotToolButton(qt.QToolButton):
+ """A QToolButton connected to a :class:`~silx.gui.plot.PlotWidget`."""
+
+ def __init__(self, parent: qt.QWidget | None = None, plot=None):
+ super(PlotToolButton, self).__init__(parent)
+ self._plotRef = None
+ if plot is not None:
+ self.setPlot(plot)
+
+ def plot(self):
+ """
+ Returns the plot connected to the widget.
+ """
+ return None if self._plotRef is None else self._plotRef()
+
+ def setPlot(self, plot):
+ """
+ Set the plot connected to the widget
+
+ :param plot: :class:`.PlotWidget` instance on which to operate.
+ """
+ previousPlot = self.plot()
+
+ if previousPlot is plot:
+ return
+ if previousPlot is not None:
+ self._disconnectPlot(previousPlot)
+
+ if plot is None:
+ self._plotRef = None
+ else:
+ self._plotRef = weakref.ref(plot)
+ self._connectPlot(plot)
+
+ def _connectPlot(self, plot):
+ """
+ Called when the plot is connected to the widget
+
+ :param plot: :class:`.PlotWidget` instance
+ """
+ pass
+
+ def _disconnectPlot(self, plot):
+ """
+ Called when the plot is disconnected from the widget
+
+ :param plot: :class:`.PlotWidget` instance
+ """
+ pass