[Zope3-Users] Custom Image Widget

[Adam Summers]

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=\"data:image/gif;base64, " +
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

Thanks and Regards,
Adam