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@@ -1,51 +1,51 b'' | |||
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1 | 1 | """ContainerWidget class. |
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2 | 2 | |
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3 | 3 | Represents a container that can be used to group other widgets. |
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4 | 4 | """ |
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5 | 5 | #----------------------------------------------------------------------------- |
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6 | 6 | # Copyright (c) 2013, the IPython Development Team. |
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7 | 7 | # |
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8 | 8 | # Distributed under the terms of the Modified BSD License. |
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9 | 9 | # |
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10 | 10 | # The full license is in the file COPYING.txt, distributed with this software. |
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11 | 11 | #----------------------------------------------------------------------------- |
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12 | 12 | |
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13 | 13 | #----------------------------------------------------------------------------- |
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14 | 14 | # Imports |
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15 | 15 | #----------------------------------------------------------------------------- |
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16 | 16 | from .widget import DOMWidget |
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17 |
from IPython.utils.traitlets import Unicode, |
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17 | from IPython.utils.traitlets import Unicode, Tuple, Instance | |
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18 | 18 | |
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19 | 19 | #----------------------------------------------------------------------------- |
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20 | 20 | # Classes |
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21 | 21 | #----------------------------------------------------------------------------- |
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22 | 22 | class ContainerWidget(DOMWidget): |
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23 | 23 | _view_name = Unicode('ContainerView', sync=True) |
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24 | 24 | |
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25 | 25 | # Keys, all private and managed by helper methods. Flexible box model |
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26 | 26 | # classes... |
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27 |
children = |
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28 |
_children = |
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27 | children = Tuple(Instance(DOMWidget)) | |
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28 | _children = Tuple(Instance(DOMWidget), sync=True) | |
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29 | 29 | |
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30 | 30 | def _children_changed(self, name, old, new): |
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31 | 31 | """Validate children list. |
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32 | 32 | |
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33 | 33 | Makes sure only one instance of any given model can exist in the |
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34 | 34 | children list. |
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35 | 35 | An excellent post on uniqifiers is available at |
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36 | 36 | http://www.peterbe.com/plog/uniqifiers-benchmark |
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37 | 37 | which provides the inspiration for using this implementation. Below |
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38 | 38 | I've implemented the `f5` algorithm using Python comprehensions.""" |
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39 | 39 | if new is not None and isinstance(new, list): |
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40 | 40 | seen = {} |
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41 | 41 | def add_item(i): |
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42 | 42 | seen[i.model_id] = True |
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43 | 43 | return i |
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44 | 44 | self._children = [add_item(i) for i in new if not i.model_id in seen] |
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45 | 45 | |
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46 | 46 | |
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47 | 47 | class PopupWidget(ContainerWidget): |
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48 | 48 | _view_name = Unicode('PopupView', sync=True) |
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49 | 49 | |
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50 | 50 | description = Unicode(sync=True) |
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51 | 51 | button_text = Unicode(sync=True) |
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