Fix solitaire bugs

[dharamsk]

Addresses the following solitaire tutorial bugs:

1. game does not load because card.update() cannot be called before card is added to page during solitaire mount() operations: assert self.__page, "Control must be added to the page first."
2. cards cannot be moved due to other card.update() operations raising the same error.
3. card dragging was not being displayed, although drop/place worked fine.
4. after a win, clicking new game would create a second solitaire instance below the first.

Fixes applied:

• updated all card.update() calls to self.solitaire.update(), which might effect performance (?) but functions as expected in my few playthroughs (addressed 1, 2 and 3)
• added an on_dismiss to the on_win alert dialog

I also modified display_waste to function according to normal solitaire rules for 3-card stock draws, and hopefully simplified the behavior.

Note: In one of my early playthroughs, the 9 of spades went missing and I couldn't finish. I never figured out how/why.

[CLAassistant]

All committers have signed the CLA.

[dharamsk]

I was thinking my changes to display_waste() might need to be updated in the documentation: https://flet.dev/docs/tutorials/python-solitaire and in the earlier steps of the tutorial but I can't find where the source is for the tutorial.

[FeodorFitsner]

Thank you! It works now!

[dharamsk]

Thanks @FeodorFitsner. Really appreciate this project. Made it really simple to get something from nothing with no UI/Frontend experience 🙌🏼

I'm happy to update the tutorial also though I think the repo might be private? https://flet.dev/docs/tutorials/python-solitaire

[ndonkoHenri]

There's an "edit this page" button at the end of that page. You will land on the corresponding file from there.

[dharamsk]

There's an "edit this page" button at the end of that page. You will land on the corresponding file from there.

Ooh excellent, thanks, I totally missed that 🤦‍♂️