1 files changed, 27 insertions, 9 deletions
diff --git a/examples/printPreview.py b/examples/printPreview.py
index 7567adb..cae1018 100755
--- a/examples/printPreview.py
+++ b/examples/printPreview.py
@@ -1,8 +1,7 @@
 #!/usr/bin/env python
-# coding: utf-8
 # /*##########################################################################
 #
-# Copyright (c) 2016-2018 European Synchrotron Radiation Facility
+# 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
@@ -42,27 +41,45 @@ from silx.gui import qt
 from silx.gui.plot import PlotWidget
 from silx.gui.plot import PrintPreviewToolButton
 
+
+class MyPrintPreviewButton(PrintPreviewToolButton.PrintPreviewToolButton):
+    """This class illustrates how to subclass PrintPreviewToolButton
+    to add a title and a comment."""
+
+    def getTitle(self):
+        return "Widget 1's plot"
+
+    def getCommentAndPosition(self):
+        legends = self.getPlot().getAllCurves(just_legend=True)
+        comment = "Curves displayed in widget 1:\n\t"
+        if legends:
+            comment += ", ".join(legends)
+        else:
+            comment += "none"
+        return comment, "CENTER"
+
+
 app = qt.QApplication([])
 
 x = numpy.arange(1000)
 
-# first widget has a standalone print preview action
+# first widget has a standalone preview action with custom title and comment
 pw1 = PlotWidget()
 pw1.setWindowTitle("Widget 1 with standalone print preview")
 toolbar1 = qt.QToolBar(pw1)
-toolbutton1 = PrintPreviewToolButton.PrintPreviewToolButton(parent=toolbar1,
-                                                            plot=pw1)
+toolbutton1 = MyPrintPreviewButton(parent=toolbar1, plot=pw1)
 pw1.addToolBar(toolbar1)
 toolbar1.addWidget(toolbutton1)
 pw1.show()
 pw1.addCurve(x, numpy.tan(x * 2 * numpy.pi / 1000))
 
-# next two plots share a common print preview
+# next two plots share a common standard print preview
 pw2 = PlotWidget()
 pw2.setWindowTitle("Widget 2 with shared print preview")
 toolbar2 = qt.QToolBar(pw2)
 toolbutton2 = PrintPreviewToolButton.SingletonPrintPreviewToolButton(
-        parent=toolbar2, plot=pw2)
+    parent=toolbar2, plot=pw2
+)
 pw2.addToolBar(toolbar2)
 toolbar2.addWidget(toolbutton2)
 pw2.show()
@@ -73,11 +90,12 @@ pw3 = PlotWidget()
 pw3.setWindowTitle("Widget 3 with shared print preview")
 toolbar3 = qt.QToolBar(pw3)
 toolbutton3 = PrintPreviewToolButton.SingletonPrintPreviewToolButton(
-        parent=toolbar3, plot=pw3)
+    parent=toolbar3, plot=pw3
+)
 pw3.addToolBar(toolbar3)
 toolbar3.addWidget(toolbutton3)
 pw3.show()
 pw3.addCurve(x, numpy.cos(x * 2 * numpy.pi / 1000))
 
 
-app.exec_()
+app.exec()