Merge pull request #21 from rbnvrw/master

Fix small bug when no canvas is available

Author: rbnvrw

pimsviewer/__init__.py

@@ -2,6 +2,7 @@
 from .plugins import (Plugin, ProcessPlugin, PlottingPlugin, AnnotatePlugin,
                       SelectionPlugin)
 from .widgets import Button, Slider, CheckBox
+from .run_gui import run
 
 try:
     from pimsviewer.qt import has_qt

pimsviewer/plugins.py

@@ -254,7 +254,9 @@ def attach(self, viewer):
         self.canvas = viewer.canvas
 
         self.viewer.original_image_changed.connect(self.process)
-        self.canvas.mpl_connect('pick_event', self.on_pick)
+
+        if self.canvas is not None:
+            self.canvas.mpl_connect('pick_event', self.on_pick)
 
         self._out = Text()
         self.add_widget(self._out)

pimsviewer/utils.py

@@ -4,6 +4,7 @@
 import functools
 
 import numpy as np
+import pims
 from pims import to_rgb, normalize
 from pims.base_frames import FramesSequence, FramesSequenceND
 from itertools import chain