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# Copyright (c) 2007, Enthought, Inc.
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Implementation of a HTMLEditor demo plugin for the Traits UI demo program.
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The HTML editor displays simple formatted HTML text in a Traits UI view.
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If the text is held in an HTML trait, then the HTMLEditor is the default. If
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the text is held in a Str trait, then you may specify the HTMLEditor explicitly
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if you wish to display it as HTML.
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The supported subset of HTML tags and features depends on the UI toolkit (WX or
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QT). This editor does not support style sheets. It does not support WYSIWYG
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editing of the text, though the unformatted text can be edited in a plain text
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The HTML editor can optionally be configured to do simple formatting of lists
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and paragraphs without HTML tags, by setting the editor's 'format_text'
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from traits.api import HasTraits, HTML
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from traitsui.api import Item, Group, View
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# Define the demo class:
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from traitsui.api import UItem, View, HTMLEditor
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# Sample text to display as HTML: header, plus module docstring, plus
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# some lists. The docstring and lists will be auto-formatted (format_text=True).
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<html><body><h1>HTMLEditor example</h1>
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<i>Here are some lists formatted in this way:</i>
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class HTMLEditorDemo ( HasTraits ):
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""" Defines the main HTMLEditor demo class. """
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# Define a HTML trait to view
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html_trait = HTML("""<html><body><p>A HTMLEditor displaying</p>
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<p>two paragraphs of text.</p></body></html>""")
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my_html_trait = HTML(sample_text)
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view = View(Group(Item('html_trait',
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UItem('my_html_trait',
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# we specify the editor explicitly in order to set format_text:
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editor=HTMLEditor(format_text=True)),
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title = 'HTMLEditor',
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examples/demo/Standard_Editors/HTMLEditor_demo.py
