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POhandler design for dynamically created listboxes
 

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    <p>I'm trying to make a UI that allow users to select an action for each agenda item in a spreadsheet. After a user select an action, I would like to update the spreadsheet with the selection. Since the data in the spreadsheet are not static, the UI was written dynamically. </p> <p>This is how I created the listboxes :</p> <pre><code>// add labels and a drop down box of actions for each agenda item mark for today for (i = 0; i &lt; labels.length; i++) { // labels is an array of objects var topic = labels[i]['topic']; // add label to grid myGrid.setWidget(i, 0, myApp.createLabel(topic)); // the id of each listbox is the content of its corresponding label var id = ObjApp.camelString(topic) var lboxActions = myApp.createListBox().setId(id); //add items to listbox lboxActions.addItem('Select'); lboxActions.addItem('Add to agenda'); lboxActions.addItem('Move to another meeting'); lboxActions.addItem('Move to a special meetin'); lboxActions.addItem('Move to email'); //add drop down list to grid myGrid.setWidget(i, 1, lboxActions); } </code></pre> <p>I have 3 questions:</p> <h2>1) Which is a better design?</h2> <p>a) <strong>Design 1</strong>: a save button next to each listbox. </p> <p>b) <strong>Design 2</strong>: one submit button at the bottom to save every entry</p> <h2>2) How would I collect information on what the user select? How would I write such handlers? I added the following code for each design but I don't think I'm doing it right.</h2> <p>a) <strong>Design 1</strong>: the following lines of code were added to the for loop described above</p> <pre><code>var buttonSave = myApp.createButton('Save'); myGrid.setWidget(i, 2, buttonSave); var handlerSelection = myApp.createServerHandler('selectAction'); handlerSelection.addCallbackElement(mainPanel); buttonSave.addClickHandler(handlerSelection); </code></pre> <p>b) <strong>Design 2</strong>: the following lines of code were added outside the for loop</p> <pre><code>//update spreadsheet when user click "submit" var handlerUpdate = myApp.createServerHandler('responseToSubmit'); handlerUpdate.addCallbackElement(mainPanel); buttonSubmit.addClickHandler(handlerUpdate); mainPanel.add(myGrid); mainPanel.add(buttonSubmit); myApp.add(mainPanel); </code></pre> <h2>3) How do I write functions for the handlers? These are not correct because I wasn't able to extract the information from the list boxes.</h2> <p>a) <strong>Design 1</strong></p> <pre><code>function responseToSave(e) { var name = e.parameter.source; var selection = e.parameter.name; var selectionObj = new Object(); selectionObj['status'] = selection; selectionObj['name'] = name; choicesMade.push(selectionObj) Logger.log(choicesMade); return choicesMade; } </code></pre> <p>b) <strong>Design 2</strong></p> <pre><code>function responseToSubmit(e) { var myApp = UiApp.getActiveApplication(); for (i=0; i &lt; labels.length; i++) { var lboxId = ObjApp.camelString(labels[i]['topic']); //[EDIT] e.parameter.lboxId would not work because lboxId is a string var selection = e.parameter[lboxId]; choicesMade[labels[i]] = selection; } Logger.log(choicesMade); return choicesMade; } </code></pre> <p>Thanks</p>
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    1. COI decided to go with Design 2 (one submit button to save all dropdowns) because Design 1 is just too much work and Design 3, as suggested by Srik is too dangerous (update spreadsheet right after the dropdown box is changed).
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