<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt">Hi,<br><br>I've made a small data entry program where a picture of a hand-written, scanned form is shown next to several text entries. The design has been largely 'bottom up', although of course I started with a rough sketch. I started with the following classes: Menu (responsible for the widget creation), Autocomplete (a subclass of the tkinter text entry widget which I've found on the internet, I wanted to keep this intact), Convert (responsible for the conversion/cropping of the images, which is somewhat tedious) and Events (here's the pain spot: this has become a mixed bag). Originally, the Events class was supposed to contain all the commands behind the widgets, but it has slowly gotten more responsibilities. Notably, all methods that deal with reading/writing the data also live here. The
program is about 500 lines of code now, including blanks.<br><br>I'd like to rewrite to entire program so that (1) all classes have just one responsibility (2) classes connect to as little other classes (so it becomes easy to e.g. change to another widget set). I'd love to hear some thoughts or advice on the new design from you (I hope my description wasn't too short). Is there a specific design pattern that could be used?<br><br>One specific, additional question: the program has a title bar that shows something like "processing file X (1 of 3; 33%)". My colleague suggested to use the Iterator pattern (gang of four) for this. Is this (a) overkill (b) a simple opportunity to apply this pattern? <br><br>Thank you in advance for your advice!<br><br>Cheers!!<br>Albert-Jan<br><br><div>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation,
roads, a fresh water system, and public health, what have the Romans ever done for us?<br>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<div><br></div></div>
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