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<p class="MsoNormal"><span style="color:#1F497D">Hi Peter,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I’m not sure what language you are using but for we use python and tkinter. I would have the order displayed in a listbox and a delete button with a function such as:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">def delete_item():<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> try:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> # get selected line index<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> index = listbox1.curselection()[0]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> listbox1.delete(index)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> except IndexError:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> pass<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">IMO, validation is an important skill to assess in this outcome. I would suggest a file that contains a list of the menu items that is loaded into an appropriate selection object such as a drop down list (good
validation). I would then have quantity as a separate entry. The quantity entry box would also have a type and range check put on it. A button would add the selected item and quantity to an orders 2d array.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">For custom items or notes you could have an entry box and a separate button to place additional items into the order.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Here is something similar we made in my class a couple of years ago:<o:p></o:p></span></p>
<p class="MsoNormal"><img width="474" height="341" id="Picture_x0020_1" src="cid:image003.jpg@01CE832B.1109CB50"><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Hope this helps you out. I’m sure others will have some other ideas.
</span><span style="font-family:Wingdings;color:#1F497D">J</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Heath Matheson<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Mount Beauty Secondary College<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> sofdev-bounces@edulists.com.au [mailto:sofdev-bounces@edulists.com.au]
<b>On Behalf Of </b>Langham, Peter P<br>
<b>Sent:</b> Wednesday, 17 July 2013 1:00 PM<br>
<b>To:</b> Year 12 Software Development Teachers' Mailing List<br>
<b>Subject:</b> [Year 12 SofDev] U4O1 - Coding help<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Good afternoon,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I’ve been working on the Trentham Spud Inn case study available on edulists, created by Elizabeth Wells, as a guide and as practice material for my teaching for U4O1.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">In short, it’s a Pizza Restaurant ordering system that requires the following tasks:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Allow the waiter/waitress to enter the table’s order<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Allow the waiter/waitress to confirm the order with the diners at the table –
<b><span style="background:yellow;mso-highlight:yellow">removing</span> </b>or adding any requested items.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Allow special requests to be appended to the order or to individual dishes.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Save all of the collected data into a text file<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">What is the best way to <b>remove</b> an item from the order?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I’ve been treating the order as one large string, where the diners may place an order as follows:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">String Order = “1 x Spudtastic, 1 x Butternut Pumpkin and fresh figs, 1 x Chicken breast and white truffle oil”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I think I’ll use a splitting function to separate the string at each comma so we’d end up with<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">String Order[0] = 1 x Spudtastic<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">String Order[1] = 1 x Butternut Pumpkin and fresh figs<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">String Order[2] = 1 x Chicken breast and white truffle oil<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">To remove the Butternut Pumpkin and fresh figs order<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">String Order[1] = String Order[2]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">String Order[2] = Null or “”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Is there a better way to do this?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Peter Langham<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Narre Warren South P12<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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