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+#!/usr/bin/env python
+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2016-2017 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.
+#
+# ###########################################################################*/
+"""
+Example to show the use of `ColorBarWidget` widget.
+It can be associated to a plot.
+
+In this exqmple the `ColorBarWidget` widget will display the colormap of the
+active image.
+
+To change the active image slick on the image you want to set active.
+"""
+
+__authors__ = ["H. Payno"]
+__license__ = "MIT"
+__date__ = "03/05/2017"
+
+
+from silx.gui import qt
+import numpy
+from silx.gui.plot import Plot2D
+from silx.gui.plot.ColorBar import ColorBarWidget
+
+image = numpy.exp(numpy.random.rand(100, 100) * 10)
+
+app = qt.QApplication([])
+
+plot = Plot2D()
+colorbar = ColorBarWidget(parent=None, plot=plot)
+colorbar.setLegend('my colormap')
+colorbar.show()
+plot.show()
+
+clm = plot.getDefaultColormap()
+clm['normalization'] = 'log'
+clm['name'] = 'viridis'
+plot.addImage(data=image, colormap=clm, legend='image')
+plot.setActiveImage('image')
+
+app.exec_()