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+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2016-2020 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.
+#
+# ###########################################################################*/
+"""Tests from interaction state machines"""
+
+__authors__ = ["T. Vincent"]
+__license__ = "MIT"
+__date__ = "18/02/2016"
+
+
+import unittest
+
+from silx.gui.plot import Interaction
+
+
+class TestInteraction(unittest.TestCase):
+ def testClickOrDrag(self):
+ """Minimalistic test for click or drag state machine."""
+ events = []
+
+ class TestClickOrDrag(Interaction.ClickOrDrag):
+ def click(self, x, y, btn):
+ events.append(('click', x, y, btn))
+
+ def beginDrag(self, x, y, btn):
+ events.append(('beginDrag', x, y, btn))
+
+ def drag(self, x, y, btn):
+ events.append(('drag', x, y, btn))
+
+ def endDrag(self, start, end, btn):
+ events.append(('endDrag', start, end, btn))
+
+ clickOrDrag = TestClickOrDrag()
+
+ # click
+ clickOrDrag.handleEvent('press', 10, 10, Interaction.LEFT_BTN)
+ self.assertEqual(len(events), 0)
+
+ clickOrDrag.handleEvent('release', 10, 10, Interaction.LEFT_BTN)
+ self.assertEqual(len(events), 1)
+ self.assertEqual(events[0], ('click', 10, 10, Interaction.LEFT_BTN))
+
+ # drag
+ events = []
+ clickOrDrag.handleEvent('press', 10, 10, Interaction.LEFT_BTN)
+ self.assertEqual(len(events), 0)
+ clickOrDrag.handleEvent('move', 15, 10)
+ self.assertEqual(len(events), 2) # Received beginDrag and drag
+ self.assertEqual(events[0], ('beginDrag', 10, 10, Interaction.LEFT_BTN))
+ self.assertEqual(events[1], ('drag', 15, 10, Interaction.LEFT_BTN))
+ clickOrDrag.handleEvent('move', 20, 10)
+ self.assertEqual(len(events), 3)
+ self.assertEqual(events[-1], ('drag', 20, 10, Interaction.LEFT_BTN))
+ clickOrDrag.handleEvent('release', 20, 10, Interaction.LEFT_BTN)
+ self.assertEqual(len(events), 4)
+ self.assertEqual(events[-1], ('endDrag', (10, 10), (20, 10), Interaction.LEFT_BTN))