Movie, not daughter, was disrespectful to father
I read the book first, and frankly, I don't remember much of either.
What I do remember is that however good a character Winn-Dixie was portrayed as in the movie, the movie still made her a worse character than in the book. In fact, EVERY character was made worse!
And her preacher father's sermons were something that the movie said were to be mocked. Basically, they made him seem completely clueless about his daughter because he was a preacher. That's not how the book was. Both the book and Opal were respectful to her father's occupation, with the only bad thing about it being that he was busy most of the time.
Every good message that was in here came out of the book. And unless you really don't like reading, you're better off reading than watching.
Still, it wasn't a bad movie... it just certainly wasn't great!