From 9d82b09b61eb6e838e1cbb7b5a72426b5a6b4727 Mon Sep 17 00:00:00 2001
From: Ray Speth <speth@mit.edu>
Date: Wed, 17 Mar 2010 15:50:09 -0400
Subject: [PATCH] Added javascript to calculate the dollar value of each share
 on-the-fly.

---
 bluechips/public/js/calculator.js    | 38 ++++++++++++++++++++++++++++
 bluechips/templates/spend/index.mako |  8 ++++--
 2 files changed, 44 insertions(+), 2 deletions(-)
 create mode 100644 bluechips/public/js/calculator.js

diff --git a/bluechips/public/js/calculator.js b/bluechips/public/js/calculator.js
new file mode 100644
index 0000000..3c5509f
--- /dev/null
+++ b/bluechips/public/js/calculator.js
@@ -0,0 +1,38 @@
+function validateSplit(input) {
+    if (!input.match(/^[\d\+\/\*\-\(\)\. ]*$/)) {
+        return Number.NaN;
+    }
+    if (input.match(/([\+\/\*\-])\1/)) {
+        return Number.NaN;
+    }
+    try {
+        v = eval(input);
+    } catch (err) {
+        return Number.NaN;
+    }
+    if (v == null) {
+        return 0;
+    }
+    return v;
+}
+
+function calcSplit() {
+    amount = document.getElementById("amount").value;
+    total = 0;
+        var values = new Array();
+    textvals = document.getElementsByClassName("share-text");
+    for (i=0; i<textvals.length; i++) {
+        v = validateSplit(textvals[i].value);
+        if (!isNaN(v)) {
+            total += v;
+        }
+        values[i] = v;
+    }
+    for (i=0; i<textvals.length; i++) {
+        id = textvals[i].id+'-calc';
+        val = (amount*values[i]/total).toFixed(2);
+        document.getElementById(id).innerHTML = val;
+    }
+}
+
+window.onload=calcSplit;
diff --git a/bluechips/templates/spend/index.mako b/bluechips/templates/spend/index.mako
index 1b0c6e3..916a307 100644
--- a/bluechips/templates/spend/index.mako
+++ b/bluechips/templates/spend/index.mako
@@ -9,7 +9,7 @@
     </tr>
     <tr>
       <th><label for="amount">Amount</label></th>
-      <td>${h.currency('amount', c.expenditure.amount, size=8)}</td>
+      <td>${h.currency('amount', c.expenditure.amount, size=8, onkeyup="calcSplit();")}</td>
     </tr>
     <tr>
       <th><label for="date">Date</label></th>
@@ -32,9 +32,12 @@
       <tr>
         <th><label for="shares-${ii}amount">${user.name}</label></th>
         <td>
-          ${h.text('shares-%d.amount' % ii, percent)}
+          ${h.text('shares-%d.amount' % ii, percent, class_="share-text", onkeyup="calcSplit();")}
           ${h.hidden('shares-%d.user_id' % ii, user.id)}
         </td>
+        <td id="shares-${ii}amount-calc" align="right">
+          0.00
+        </td>
       </tr>
     % endfor
     <tr>
@@ -44,3 +47,4 @@
     </tr>
   </table>
 </form>
+${h.javascript_link('%s/js/calculator.js' % request.script_name)}
-- 
2.45.2