Calculations

JavaScript enables on-the-fly calculations to be scripted for use in Notes as well as on the Web. If you have an application that will be used in both Notes and the Web, JavaScript allows you to code one solution for both. Here's how.

This example takes you through some simple math. The first thing you have to keep in mind is that all fields in JavaScript are evaluated literally. If the number field format is set to currency, the currency sign will be included in the calculation and will result in a NaN. In this example, a calccosts () function has been created in the JS Header on the problem report form in the sample database. Here's the code:

function calccosts() { 
myform = document.forms[0];
var result = eval(myform.Hours.value * myform.Rate.value);
myform.TotalCost.value = result;
}

This function multiplies the two fields Hours and Rate on the form and sets the var result with the result. The TotalCost field is then set with the value of the var result . The Hours, Rate, and TotalCost field formats are all set to a number, decimal, or varying data type on the form.

To call the function, place the calccosts() statement in the onBlur event of the Hours and Rate fields. When either field is exited, the calccosts() function is called. Figure 16.20 shows how it looks in Domino Designer.

Figure 16.20. Calling the calccosts() function in Domino Designer.

graphics/16fig20.jpg

Figure 16.21 shows how the result looks on the Web.

Figure 16.21. The calculation code results on the Web.

graphics/16fig21.jpg

Figure 16.22 shows how the same result looks in Notes.

Figure 16.22. The calculation code results in Notes.

graphics/16fig22.jpg

The differences are only in the client ”the JavaScript code works the same in both.

Part I. Introduction to Release 6

Whats New in Release 6?

The Release 6 Object Store

The Integrated Development Environment

Part II. Foundations of Application Design

Forms Design

Advanced Form Design

Designing Views

Using Shared Resources in Domino Applications

Using the Page Designer

Creating Outlines

Adding Framesets to Domino Applications

Automating Your Application with Agents

Part III. Programming Domino Applications

Using the Formula Language

Real-World Examples Using the Formula Language

Writing LotusScript for Domino Applications

Real-World LotusScript Examples

Writing JavaScript for Domino Applications

Real-World JavaScript Examples

Writing Java for Domino Applications

Real-World Java Examples

Enhancing Domino Applications for the Web

Part IV. Advanced Design Topics

Accessing Data with XML

Accessing Data with DECS and DCRs

Security and Domino Applications

Creating Workflow Applications

Analyzing Domino Applications

Part V. Appendices

Appendix A. HTML Reference

Appendix B. Domino URL Reference



Lotus Notes and Domino 6 Development
Lotus Notes and Domino 6 Development (2nd Edition)
ISBN: 0672325020
EAN: 2147483647
Year: 2005
Pages: 288

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