Added a DynamicWidgetContainer #718
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Thanks! This looks like a nice contribution!
If I understand correctly, this new class is needed, because although the JS Widget supports dynamically changing parents, this does not really work for the PyWidget, right? (Sorry, I have not actively used Flexx for a while).
I left a few comments, but none are big issues, I think.
| async_task = threading.Event() | ||
| pos = len(self.pages) | ||
| self.pages.append(async_task) # this is the new location for this instance | ||
| while self.pages[pos] is not async_task: | ||
| pos += 1 # in case some other thread added to the list |
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Shouldn't this block be dendented? (It's now under the if options is None.)
| @event.reaction("_emit_instantiate") | ||
| def __instantiate(self, *events): | ||
| with self: | ||
| with events[0]['widget_type'](events[0]['style']) as page: |
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Could you please add a few lines of comments explaining the flow. As I understand it, first a threading.task is appended to .pages and that is exchanged for an actual page instance here. Does this trick have to do with thread-safety?
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| class Example(flx.PyWidget): | ||
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| # The CSS is not used by flex in PyWiget but it should be applied to the top div: TODO |
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There are a few TODO's in this this PR's code. Do you plan to fix these in this PR, or do you think that's not needed?
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This todo will need fixing to have PyWidget work like a Widget. I'm just not shure how to do it at this point.
| @@ -0,0 +1,80 @@ | |||
| from flexx import flx | |||
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Could you please add a short docstring at the top of the examples to briefly explain the purpose of the examples?
Change to None comparision Co-authored-by: Almar Klein <[email protected]>
Co-authored-by: Almar Klein <[email protected]>
Yes, that is right. My goal is to have a flexx server that can dynamically serve a client application. The GUI of the client can change completely according to the user actions: view it as a web page that a user is browsing where the pages are dynamically generated by the flexx application. I'm currently working with that class and will try to put a better sample at one point. Especially the sample with the thread which is intended for a single client application and that should be extended to serve multiple browser clients. I will work on the requested changes (Though not right away for some of them; let me play more with the base class and come back with better samples). |
Hi Almarklein,
I've added a dynamic container for widgets. I'm using it for a few applications and I thought of sharing it as I see some questions regarding adding and removing widgets on the fly.
Look at the examples, it will show you what it is capable of.
Side note: The file flexx/event/_js.py was not working for me, there is some error in _clean_code_of_thread_stuff. It seem to block a lot of examples so you are probably on it. Just use the old version or the fixed one if you have one.
Have fun ;)