friendica-addons/calc/calc.php

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<?php
/**
* Name: Calculator App
* Description: Simple Calculator Application
* Version: 1.0
* Author: Mike Macgirvin <http://macgirvin.com/profile/mike>
*/
use Friendica\App;
use Friendica\Core\Hook;
use Friendica\DI;
function calc_install() {
Hook::register('app_menu', 'addon/calc/calc.php', 'calc_app_menu');
}
function calc_app_menu(array &$b)
{
$b['app_menu'][] = '<div class="app-title"><a href="calc">Calculator</a></div>';
}
/**
* This is a statement rather than an actual function definition. The simple
* existence of this method is checked to figure out if the addon offers a
* module.
*/
function calc_module() {}
function calc_init()
{
$x = <<< EOT
<script language="JavaScript">
/**************************************
* www.FemaleNerd.com *
**************************************/
// Declare global variables
var displayText = ""
var num1
var num2
var operatorType
// Write to display
function addDisplay(n){
id = document.getElementById("display");
id.value = ""
displayText += n
id.value = displayText
}
// Addition
function addNumbers() {
if (displayText == "") {
displayText = result
}
num1 = parseFloat(displayText)
operatorType = "add"
displayText = ""
}
// Subtraction
function subtractNumbers() {
if (displayText == "") {
displayText = result
}
num1 = parseFloat(displayText)
operatorType = "subtract"
displayText = ""
}
// Multiplication
function multiplyNumbers() {
if (displayText == "") {
displayText = result
}
num1 = parseFloat(displayText)
operatorType = "multiply"
displayText = ""
}
// Division
function divideNumbers() {
if (displayText == "") {
displayText = result
}
num1 = parseFloat(displayText)
operatorType = "divide"
displayText = ""
}
// Sine
function sin() {
id = document.getElementById("display");
if (displayText == "") {
num1 = result
}
else {
num1 = parseFloat(displayText)
}
if (num1 != "") {
result = Math.sin(num1)
id.value = result
displayText = ""
}
else {
alert("Please write the number first")
}
}
// Cosine
function cos() {
id = document.getElementById("display");
if (displayText == "") {
num1 = result
}
else {
num1 = parseFloat(displayText)
}
if (num1 != "") {
result = Math.cos(num1)
id.value = result
displayText = ""
}
else {
alert("Please write the number first")
}
}
// ArcSine
function arcSin() {
id = document.getElementById("display");
if (displayText == "") {
num1 = result
}
else {
num1 = parseFloat(displayText)
}
if (num1 != "") {
result = Math.asin(num1)
id.value = result
displayText = ""
}
else {
alert("Please write the number first")
}
}
// ArcCosine
function arcCos() {
id = document.getElementById("display");
if (displayText == "") {
num1 = result
}
else {
num1 = parseFloat(displayText)
}
if (num1 != "") {
result = Math.acos(num1)
id.value = result
displayText = ""
}
else {
alert("Please write the number first")
}
}
// Square root
function sqrt() {
id = document.getElementById("display");
if (displayText == "") {
num1 = result
}
else {
num1 = parseFloat(displayText)
}
if (num1 != "") {
result = Math.sqrt(num1)
id.value = result
displayText = ""
}
else {
alert("Please write the number first")
}
}
// Square number (number to the power of two)
function square() {
id = document.getElementById("display");
if (displayText == "") {
num1 = result
}
else {
num1 = parseFloat(displayText)
}
if (num1 != "") {
result = num1 * num1
id.value = result
displayText = ""
}
else {
alert("Please write the number first")
}
}
// Convert degrees to radians
function degToRad() {
id = document.getElementById("display");
if (displayText == "") {
num1 = result
}
else {
num1 = parseFloat(displayText)
}
if (num1 != "") {
result = num1 * Math.PI / 180
id.value = result
displayText = ""
}
else {
alert("Please write the number first")
}
}
// Convert radians to degrees
function radToDeg() {
id = document.getElementById("display");
if (displayText == "") {
num1 = result
}
else {
num1 = parseFloat(displayText)
}
if (num1 != "") {
result = num1 * 180 / Math.PI
id.value = result
displayText = ""
}
else {
alert("Please write the number first")
}
}
// Calculations
function calculate() {
id = document.getElementById("display");
if (displayText != "") {
num2 = parseFloat(displayText)
// Calc: Addition
if (operatorType == "add") {
result = num1 + num2
id.value = result
}
// Calc: Subtraction
if (operatorType == "subtract") {
result = num1 - num2
id.value = result
}
// Calc: Multiplication
if (operatorType == "multiply") {
result = num1 * num2
id.value = result
}
// Calc: Division
if (operatorType == "divide") {
result = num1 / num2
id.value = result
}
displayText = ""
}
else {
id.value = "Oops! Error!"
}
}
// Clear the display
function clearDisplay() {
id = document.getElementById("display");
displayText = ""
id.value = ""
}
</script>
EOT;
DI::page()['htmlhead'] .= $x;
}
function calc_content($app) {
$o = '';
$o .= <<< EOT
<h3>Calculator</h3>
<br /><br />
<table>
<tbody><tr><td>
<table bgcolor="#af9999" border="1">
<tbody><tr><td>
<table border="1" cellpadding="2" cellspacing="2">
<form name="calc">
<!--
<TR><TD VALIGN=top colspan=6 ALIGN="center"> <H2>Calculator</H2> </TD>
-->
<tbody><tr>
<td colspan="5"><input size="22" id="display" name="display" type="text"></td>
</tr><tr align="left" valign="middle">
<td><input name="one" value="&nbsp;&nbsp;1&nbsp;&nbsp;&nbsp;" onclick="addDisplay(1)" type="button"></td>
<td><input name="two" value="&nbsp;&nbsp;2&nbsp;&nbsp;&nbsp;" onclick="addDisplay(2)" type="button"></td>
<td><input name="three" value="&nbsp;&nbsp;3&nbsp;&nbsp;&nbsp;" onclick="addDisplay(3)" type="button"></td>
<td><input name="plus" value="&nbsp;&nbsp;+&nbsp;&nbsp;&nbsp;" onclick="addNumbers()" type="button"></td>
</tr><tr align="left" valign="middle">
<td><input name="four" value="&nbsp;&nbsp;4&nbsp;&nbsp;&nbsp;" onclick="addDisplay(4)" type="button"></td>
<td><input name="five" value="&nbsp;&nbsp;5&nbsp;&nbsp;&nbsp;" onclick="addDisplay(5)" type="button"></td>
<td><input name="six" value="&nbsp;&nbsp;6&nbsp;&nbsp;&nbsp;" onclick="addDisplay(6)" type="button"></td>
<td><input name="minus" value="&nbsp;&nbsp;&nbsp;-&nbsp;&nbsp;&nbsp;" onclick="subtractNumbers()" type="button"></td>
</tr><tr align="left" valign="middle">
<td><input name="seven" value="&nbsp;&nbsp;7&nbsp;&nbsp;&nbsp;" onclick="addDisplay(7)" type="button"></td>
<td><input name="eight" value="&nbsp;&nbsp;8&nbsp;&nbsp;&nbsp;" onclick="addDisplay(8)" type="button"></td>
<td><input name="nine" value="&nbsp;&nbsp;9&nbsp;&nbsp;&nbsp;" onclick="addDisplay(9)" type="button"></td>
<td><input name="multiplication" value="&nbsp;&nbsp;*&nbsp;&nbsp;&nbsp;&nbsp;" onclick="multiplyNumbers()" type="button"></td>
</tr><tr align="left" valign="middle">
<td><input name="zero" value="&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;" onclick="addDisplay(0)" type="button"></td>
<td><input name="pi" value="&nbsp;Pi&nbsp;&nbsp;" onclick="addDisplay(Math.PI)" type="button"> </td>
<td><input name="dot" value="&nbsp;&nbsp;&nbsp;.&nbsp;&nbsp;&nbsp;" onclick='addDisplay(".")' type="button"></td>
<td><input name="division" value="&nbsp;&nbsp;&nbsp;/&nbsp;&nbsp;&nbsp;" onclick="divideNumbers()" type="button"></td>
</tr><tr align="left" valign="middle">
<td><input name="sqareroot" value="sqrt" onclick="sqrt()" type="button"></td>
<td><input name="squarex" value=" x^2" onclick="square()" type="button"></td>
<td><input name="deg-rad" value="d2r&nbsp;" onclick="degToRad()" type="button"></td>
<td><input name="rad-deg" value="r2d&nbsp;" onclick="radToDeg()" type="button"></td>
</tr><tr align="left" valign="middle">
<td><input name="sine" value="&nbsp;sin&nbsp;" onclick="sin()" type="button"></td>
<td><input name="arcsine" value="asin" onclick="arcSin()" type="button"></td>
<td><input name="cosine" value="cos" onclick="cos()" type="button"></td>
<td><input name="arccosine" value="acs" onclick="arcCos()" type="button"></td>
</tr><tr align="left" valign="middle">
<td colspan="2"><input name="clear" value="&nbsp;&nbsp;Clear&nbsp;&nbsp;" onclick="clearDisplay()" type="button"></td>
<td colspan="3"><input name="enter" value="&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" onclick="calculate()" type="button"></td>
</tr></tbody></table>
</form>
<!--
<TD VALIGN=top>
<B>NOTE:</B> All sine and cosine calculations are
<br>done in radians. Remember to convert first
<br>if using degrees.
</TD>
-->
</td></tr></tbody></table>
</td></tr></tbody></table>
EOT;
return $o;
}