MachForm Community Forums Topic: How to add a field that calculates the sum of other fields ?

MachForm Community Forums Topic: How to add a field that calculates the sum of other fields ? https://www.machform.com/forums/ MachForm Community Forums Topic: How to add a field that calculates the sum of other fields ? en Sun, 03 May 2026 23:30:19 +0000 daltx7 on "How to add a field that calculates the sum of other fields ?" https://www.machform.com/forums/topic/how-to-add-a-field-that-calculates-the-sum-of-other-fields-#post-20449 Thu, 13 Mar 2014 23:51:08 +0000 daltx7 20449@https://www.machform.com/forums/ <p>Because of the time before the first message, I am trying to find the code in order to insert my own calculation field, but the code no longer exists. Was there ever a resolution with this or is there a way to do this now? I can work with the existing script using my own element fields, but need to know where to insert the code and whether it works. Maybe someone can help with MachForm3. BTW, Major Release 4.0 and no calculation fields? </p> atteam on "How to add a field that calculates the sum of other fields ?" https://www.machform.com/forums/topic/how-to-add-a-field-that-calculates-the-sum-of-other-fields-#post-14118 Mon, 26 Mar 2012 14:50:58 +0000 atteam 14118@https://www.machform.com/forums/ <p>I've tried this but doesn't work.<br /> No error though...<br /> can you help?</p> <p>thanks a lot </p> redityo on "How to add a field that calculates the sum of other fields ?" https://www.machform.com/forums/topic/how-to-add-a-field-that-calculates-the-sum-of-other-fields-#post-6887 Mon, 10 Aug 2009 17:33:01 +0000 redityo 6887@https://www.machform.com/forums/ <p>Hmmm .. It's possible to use a javascript for calculation and add a "hidden" field for calculation result. To do so edit "includes/view-functions.php" file and try to follow these steps - It's quite long ;) - :</p> <p>1. Go to line 1818 ~ 1822, you will see these code : </p> <pre><code>if($has_calendar){ $calendar_js = '<script type="text/javascript" src="js/calendar.js"></script>'; }else{ $calendar_js = ''; }</code></pre> <p>Put these code exactly bellow that line </p> <pre><code>if ($_GET['id'] == 3) { $calculate_js = <<<EOT <script type="text/javascript"> function calculate() { //reset text box value $('#element_4').val('0'); sum_data = parseInt($('#element_1').val()) + parseInt($('#element_2').val()) + parseInt($('#element_3').val()) ; $('#element_4').val (sum_data); } </script> EOT; }</code></pre> <p>2. Go to line 1851 and you will see this code </p> <pre><code><script type="text/javascript" src="js/view.js"></script></code></pre> <p>put this code exactly bellow that line </p> <pre><code><script type="text/javascript" src="js/jquery/jquery-core.js"></script> {$calculate_js}</code></pre> <p>3. Go to around line 40, you'll see this code :</p> <pre><code>$element_markup = <<<EOT</code></pre> <p>put these code above that line </p> <pre><code>if ($_GET['id'] == 3) { $onchange_script = ' onchange="javascript:calculate();" '; }</code></pre> <p>4. Go to line 44, you will see this code :</p> <pre><code><input id="element_{$element->id}" name="element_{$element->id}" class="element text {$element->size}" type="text" value="{$element->default_value}" /></code></pre> <p>change to</p> <pre><code><input {$onchange_script} id="element_{$element->id}" name="element_{$element->id}" class="element text {$element->size}" type="text" value="{$element->default_value}" /></code></pre> <p>I there I assume your form id = 3 and the text box id to be calculated are 1,2,3, with field result id = 4.</p> <p>Anyway for the result, I suggest to use a hidden field instead an admin only field, to hide the result field (element_4), you can add this CSS code to your CSS form : </p> <pre><code>#li_4 { display:none !important; }</code></pre> <p>Make sure you've change those id. </p> Leopard on "How to add a field that calculates the sum of other fields ?" https://www.machform.com/forums/topic/how-to-add-a-field-that-calculates-the-sum-of-other-fields-#post-6883 Sun, 09 Aug 2009 22:57:08 +0000 Leopard 6883@https://www.machform.com/forums/ <p>Any idea ? </p> Leopard on "How to add a field that calculates the sum of other fields ?" https://www.machform.com/forums/topic/how-to-add-a-field-that-calculates-the-sum-of-other-fields-#post-6835 Wed, 05 Aug 2009 03:53:12 +0000 Leopard 6835@https://www.machform.com/forums/ <p>i need a field which is visible for admin only this field calculates the sum of other fields:</p> <p>element_4 = element_1 + element_2 + element_3 </p> <p>the field must be generated automatically and can be changed only if the the other fields changed so the sum will be changed </p> <p>Thanks :) </p>