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Hi Tom & Widget Afficionados.<br>
<br>
Thanks for the help so far.<br>
<br>
My problem is now this:<br>
<br>
From this code (which Tom supplied), how do I code the logic (in
bold) <br>
<pre wrap="">
def _toFieldValue(self, input):
data = super(ImageWidget, self)._toFieldValue(input)
if data is not None:
img = Image(data)
notify(ObjectCreatedEvent(img))
return img
<b>else: #data is None, ie. the File input field was left blank and we don't want to
#replace the current value of the Image Widget with an empty value.
currentImg = the Image object which the field is being rendered for
return currentImg
</b></pre>
I can't rely on <br>
<br>
<blockquote>
<pre> field = self.context</pre>
<pre> image = field.get(field.context)</pre>
</blockquote>
<br>
logic to find the data, because my schema can contain:<br>
<br>
<pre>class Iclaim(IContained):</pre>
<pre> """Claim"""</pre>
<pre> supDoc = List(title=_(u"Supporting Docs List"), value_type=Object(IImage, __name__='ImgItem', title=_(u"Image")))</pre>
<pre> img = Object(IImage, title=_(u"Single img"), required=False)</pre>
<br>
And hence, the self.context.context points to the claim object, not
the list inside when rendering supDoc<br>
Again, any help is much appreciated.<br>
Regards,<br>
Adam<br>
<br>
Tom Dossis wrote:
<blockquote cite="mid457DEF84.9030209@yoma.com.au" type="cite">
<pre wrap="">Adam Summers wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi,
I have the following widgets.
class MyImageDisplayWidget(DisplayWidget):
class_ = Image
def __call__(self):
mycontent = u"oops! no img"
if self._renderedValueSet():
mycontent = "<img src=\<a class="moz-txt-link-rfc2396E" href="data:image/gif;base64,">"data:image/gif;base64, "</a> +
b64encode(self._data.data) + " \" />"
return mycontent
MyImageListDisplayWidget = CustomWidgetFactory(SequenceDisplayWidget,
subwidget = MyImageDisplayWidget)
class MyImageWidget(FileWidget):
class_ = Image
def _toFieldValue(self, input):
value = super(MyImageWidget, self)._toFieldValue(input)
return self.class_(value)
MyImageListWidget = CustomWidgetFactory(ListSequenceWidget, subwidget =
MyImageWidget)
I want to build a better input widget (MyImageWidget), so that we can do
the following:
* If the field has no data, display a file input.
* If the field has data, display the image.
I know that there are design shortcomings in this, but I need a simple
example (and I only use the files in lists anyway, so I can delete images).
Any pointers on how to go about this would be much appreciated; as always
</pre>
</blockquote>
<pre wrap=""><!---->
Hi Adam,
I'm not exactly sure of your use case, but I've included a widget
implementation (see below) which you may find useful. I've used this
widget for an attribute which is an IImage, e.g.
</pre>
</blockquote>
<br>
<snip><br>
<blockquote cite="mid457DEF84.9030209@yoma.com.au" type="cite">
<pre wrap="">
class ImageInputWidget(FileWidget):
def _toFieldValue(self, input):
data = super(ImageWidget, self)._toFieldValue(input)
if data is not None:
img = Image(data)
notify(ObjectCreatedEvent(img))
return img
def __call__(self):
input_widget = super(ImageWidget, self).__call__()
try:
image = ImageDisplayWidget(self.context, self.request)()
info = self.info()
return u'<br />'.join([image, info, input_widget])
except AttributeError:
# This happens because the context is IAdding
return input_widge</pre>
</blockquote>
</snippet><br>
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