Your second PDF form with Scribus (and Javascript): Difference between revisions
Line 44: | Line 44: | ||
==Calculate form field values== | ==Calculate form field values== | ||
Now we would like to perform some simple calculations on form field values. In the following example, we will sum up the values of field1 and field2 and | Now we would like to perform some simple calculations on form field values. In the following example, we will sum up the values of field1 and field2 and increase the result by 20% depending of whether checkbox1 has been checked or not. The final result will be displayed in the third form field. The code snipped below has to be pasted into the '''MouseDown''' event of the red button too. | ||
<pre> | <pre> |
Revision as of 18:34, 10 February 2008
Work in progress!
Introduction
JavaScript functions in a PDF document
Teaching material (Scribus source file and PDF form) for download .
Adding new functions
Go to Edit/Javascripts... and click on Add. Choose a name for your new function and click on OK to launch the built-in JavaScript editor.
Let us call our first function RunOnLaunch and start with a simple alert that will be displayed on launching the PDF formular in Adobe Reader:
function RunOnLaunch() { app.alert('Welcome to the Scribus Demo Form!'); }
Launching JavaScript functions while opening documents
Go to File/Export/Save as PDF and click on the Viewer tab. Choose the JavaScript to be executed from the Special Actions drop down list. Save the PDF document and open in with the Adobe Reader to see how it works.
Adding JavaScript actions to form field events
Let us make some text fields and text frames first. We will also need an optional checkbox and a button for performing some JavaScript actions (see the picture below). If you do not know, how to create form fields, read this howto first.
Validate form fields
First, we want to prevent users from submitting empty form fields. Right click on the button, choose PDF Options / Field properties from the context menu, go to the Action tab, choose JavaScript from the Type drop down list and add the following snippet of JavaScript code to the MouseDown event:
if(!this.getField('field1').value) { app.alert('Please fill a number into field 1'); } else if (!this.getField('field2').value) { app.alert('Please fill a number into field 2'); }
Calculate form field values
Now we would like to perform some simple calculations on form field values. In the following example, we will sum up the values of field1 and field2 and increase the result by 20% depending of whether checkbox1 has been checked or not. The final result will be displayed in the third form field. The code snipped below has to be pasted into the MouseDown event of the red button too.
if(!this.getField('field1').value) { app.alert('Please fill a number into field 1'); } else if (!this.getField('field2').value) { app.alert('Please fill a number into field 2'); } else { app.alert('Adding field1 to field2 and putting the result into field3'); this.getField('field3').value = this.getField('field1').value + this.getField('field2').value; app.alert('and now add 20% VAT to the result, if checkbox1 is checked '); var v = this.getField('checkbox1'); if(v.value=='Yes') var vat = this.getField('field3').value * 0.2; else var vat = 0; this.getField('field3').value = this.getField('field3').value + vat; }
Changing field properties with a document wide script executed on button click
Create list boxes and combo boxes
Add a new JavaScript function
function SetFieldValues() { app.alert('Running a document wide script SetFieldValues. To see how it works, open the source document in Scribus and go to Edit/JavaScripts.'); app.alert('Changing the values of the combobox and the listbox'); //setting combobox value to 12 this.getField("combobox1").value = '12'; //setting listbox value to option 3 this.getField("listbox1").value = 'option 3'; // Get the current date and time var rightNow = new Date(); rightNow = rightNow.toLocaleDateString(); var fld = this.getField("date"); //Change the date field border to dark blue app.alert('Changing the date field border to dark blue, setting the date to current value, and changing the date text color to purple.'); fld.strokeColor = ["RGB",0.5,0.5,1]; //Change fill to light blue, won't work for unknown reason fld.Color = ["RGB",0,0,0.7]; //set the value of the date field to current date fld.value = rightNow; //Change text of the date field to purple fld.textColor = ["RGB", 0.5, 0, 0.5]; }
Assign the new JavaScript function to a button event
(c)
The content of this page is available under the Creative Commons Attribution-ShareAlike Licence and Free Documentation Licence
If you alter, transform, or build upon this work, you may distribute the resulting work either under one or under both of the abovementioned licences.