651 lines
17 KiB
HTML
651 lines
17 KiB
HTML
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<html>
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<head>
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<style type="text/css">
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div.guess {
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border: thick double black;
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padding: 1em;
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width: 50%;
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font-family: Arial, Helvetica, sans-serif;
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}
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div.guess h2 {
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margin: 0;
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padding: 0;
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text-align: center;
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margin-left: 1em;
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margin-right: 1em;
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}
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div.guess input {
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font-size: 100%;
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}
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div.guess p.input {
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margin: 0;
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padding: 0;
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font-size: 150%;
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margin-top: .5em;
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margin-bottom: .5em;
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text-align: center;
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margin-left: 1em;
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margin-right: 1em;
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}
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div.guess input.button {
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margin: 0;
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padding: 0;
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display: inline;
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padding-left: .5em;
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padding-right: .5em;
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padding-top: .25em;
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padding-bottom: .25em;
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}
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div#alert1 {
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position: absolute;
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width: 25%;
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border:medium solid black;
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display: none;
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background-color: white;
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color: black;
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text-align: center;
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padding-bottom: 1em;
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font-family: Arial, Helvetica, sans-serif;
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}
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div#alert1 p.title {
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margin: 0;
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padding: 0;
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color: white;
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background-color: black;
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text-align: center;
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font-weight: bold;
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border-top: thin solid white;
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border-left: thin solid white;
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border-right: thin solid white;
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}
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</style>
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<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
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<script type="text/javascript">
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$(document).ready(function () {
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var guess1 = new guess(1, 10, 'guess1', 'guess1_text', 'guess1_check', 'guess1_again', 'alert1');
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});
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//
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// keyCodes is an object that defines keycodes for the key handlers
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//
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function keyCodes () {
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// Define values for keycodes
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this.tab = 9;
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this.enter = 13;
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this.esc = 27;
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this.space = 32;
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}
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//
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// alertDlg() is a class to implement a modal alert dialog
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//
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// @param (alert_id string) alert_id is the id of the dialog to create
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//
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// @param (game_id string) game_id is the id to attach the dialog to
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// @return N/A
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//
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function alertDlg(alert_id, game_id) {
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var dlg = '<div id="' + alert_id + '" role="alertdialog" tabindex="-1" aria-hidden="true" aria-labeledby="' +
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alert_id + '_title"><p id="' + alert_id + '_title" class="title">Alert Box</p><p id="' +
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alert_id + '_message">No Message</p><input id="' +
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alert_id + '_close" type="button" value="Close" /></div>';
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// append the dialog to the document
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$('div#' + game_id).append(dlg);
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// Define the object properties
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this.$dlg = $('#' + alert_id); // the object pointer of the dialog
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this.$game = $('#' + game_id); // the object pointer of the containing div for the game
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this.$msg = $('#' + alert_id + '_message'); // the object pointer of the alert message area
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this.$button = $('#' + alert_id + '_close'); // the object pointer of the alert close button
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this.$focus; // the object pointer of a page element to give focus to on dialog dismissal
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this.keys = new keyCodes();
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// bind handlers
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this.bindHandlers();
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} // end alertDlg constructor
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//
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// showMsg() is a member function to set the message text of the alertDlg
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//
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// @param (msg string) msg is the message to display in the dialog box.
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//
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// @param (focusId string) focusId is the id of the element to give focus to when the dialog is dismissed.
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//
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// @return N/A
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//
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alertDlg.prototype.showMsg = function (msg, $focus) {
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// Store the focus ID
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this.$focus = $focus;
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// Set the message text
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this.$msg.html(msg);
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// Show the dialog
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this.showDlg();
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} // end showMsg()
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//
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// bindHandlers() is a member function to bind event handlers to the modal alert dialog
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//
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// @return N/A
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//
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alertDlg.prototype.bindHandlers = function () {
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var thisObj = this; // store the this pointer
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// bind a keydown handler
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this.$dlg.keydown(function(e) {
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return thisObj.handleDlgKeyDown(e);
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});
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// bind a keypress handler
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this.$dlg.keypress(function(e) {
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return thisObj.handleDlgKeyPress(e);
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});
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// bind a click handler
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this.$button.click(function(e) {
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return thisObj.handleCloseClick(e);
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});
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} // end bindhandlers()
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//
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// handleDlgKeyDown() is a member function to process keydown events for the alert dialog
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//
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// @param (evt obj) evt is the event object associated with the keydown event
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//
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// @return (boolean) true if propagating; false if consuming event
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//
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alertDlg.prototype.handleDlgKeyDown = function(evt) {
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if (evt.ctrlKey || evt.AltKey) {
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// do nothing
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return true;
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}
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switch (evt.keyCode) {
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case this.keys.tab: {
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// Consume the tab event and do nothing
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evt.stopPropagation;
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return false;
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}
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case this.keys.enter:
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case this.keys.esc:
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case this.keys.space: {
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// hide the dialog
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this.hideDlg();
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evt.stopPropagation;
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return false;
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break;
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}
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} // end switch
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return true;
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} // end handleDlgKeyDown()
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//
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// handleDlgKeyPress() is a member function to consume keypress events for the alert dialog
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//
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// @param (evt obj) evt is the event object associated with the keydown event
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//
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// @return (boolean) true if propagating; false if consuming event
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//
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alertDlg.prototype.handleDlgKeyPress = function(evt) {
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if (evt.ctrlKey || evt.AltKey) {
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// do nothing
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return true;
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}
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switch (evt.keyCode) {
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case this.keys.tab:
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case this.keys.enter:
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case this.keys.esc:
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case this.keys.space: {
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evt.stopPropagation;
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return false;
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break;
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}
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} // end switch
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return true;
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} // end handleDlgKeyPress()
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//
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// handleCloseClick() is a member function to process click events for the alert dialog close button
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//
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// @param (evt obj) evt is the event object associated with the click event
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//
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// @return (boolean) true if propagating; false if consuming event
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//
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alertDlg.prototype.handleCloseClick = function(evt) {
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if (evt.shiftKey || evt.ctrlKey || evt.AltKey) {
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// do nothing
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return true;
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}
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// Hide the dialog
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this.hideDlg();
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evt.stopPropagation;
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return false;
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} // end handleCloseClick()
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//
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// showDlg() is a member function to show the alert dialog and give it focus
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//
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// @return N/A
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//
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alertDlg.prototype.showDlg = function() {
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var thisObj = this;
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// Bind an event listener to the document to capture all mouse events to make dialog modal
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$(document).bind('click mousedown mouseup mousemove mouseover', function(e) {
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//ensure focus remains on the dialog
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thisObj.$dlg.focus();
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// Consume all mouse events and do nothing
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e.stopPropagation;
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return false;
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});
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// Position the dialog centered in the containing div
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this.$dlg.css('left', (this.$game.width() - this.$dlg.width()) / 2 + this.$game.offset().left + 'px');
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this.$dlg.css('top', (this.$game.height() - this.$dlg.height()) / 2 + this.$game.offset().top + 'px');
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// Display the dialog
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this.$dlg.show();
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this.$dlg.attr('aria-hidden', 'false');
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// Give the dialog focus
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this.$dlg.attr('tabindex', '0');
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this.$dlg.focus();
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} // end showDlg()
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//
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// hideDlg() is a member function to hide the alert dialog and return focus to the page
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//
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// @return N/A
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//
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alertDlg.prototype.hideDlg = function() {
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// set aria hidden attribute and remove dialog from tab order
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this.$dlg.attr('aria-hidden', 'true');
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this.$dlg.attr('tabindex', '-1');
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// hide the dialog
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this.$dlg.hide();
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// Unbind the document mouse event listeners
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$(document).unbind('click mousedown mouseup mousemove');
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// return focus to the specified page element
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if (this.$focus) {
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this.$focus.focus();
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}
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} // end hideDlg()
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///////////////////////////////////////////////////////////////////////////////////////////
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//
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// guess() is a class to implement a simple number guessing game
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//
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// @param (game_id) game_id is the id to attach the instance of the game to.
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//
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// @param (max integer) min is the maximum number to guess.
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//
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// @param (text_id string) text_id is the id of the text box where player enters a guess.
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//
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// @param (check_id string) check_id is the id of the check guess button.
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//
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// @param (again_id string) again_id is the id of the play again button.
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//
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// @param (alertObj) alertObj is the modal dialog object where game messages will be printed.
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//
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// @return N/A
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//
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function guess(min, max, game_id, text_id, check_id, again_id, alert_id) {
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// define class properties
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this.minGuess = min; // the minimum number to guess
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this.maxGuess = max; // the maximum number to guess
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this.$text = $('#' + text_id); // the jQuery object pointer to the text box
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this.$check = $('#' + check_id); // the jQuery object pointer to the check guess button
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this.$again = $('#' + again_id); // the jQuery object pointer to the play again button
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this.alertDlg = new alertDlg('alert1', game_id); // the modal alert dialog to be displayed during the game
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this.guessVal = -1; // the number for the player to guess
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this.guessCount = 0; // the number of attempts the player has made
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this.keys = new keyCodes();
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// bind event handlers
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this.bindHandlers();
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// initialize the game
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this.newGame();
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} // end guess object constructor
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//
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// newGame() is a member function to set up a new game. The function chooses a number
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// between 1 and the max number specified at instantiation, sets the guess count to 0, and
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// show the user a message to make a guess.
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//
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// @return N/A
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guess.prototype.newGame = function () {
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// get a new random number for the player to guess
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this.guessVal = Math.floor(Math.random()*(this.maxGuess - this.minGuess + 1)) + this.minGuess;
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// reset the guess count
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this.guessCount = 0;
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// reset the guess text box
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this.$text.val('');
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this.$text.attr('aria-invalid', 'false');
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// Re-enable the buttons
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this.$text.removeAttr('disabled');
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this.$check.removeAttr('disabled');
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// Set focus on the guess text box
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this.$text.focus();
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} // end newGame
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//
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// bindHandlers() is a function to bind the event handlers for the game controls
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//
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// @return N/A
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//
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guess.prototype.bindHandlers = function () {
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var thisObj = this; // Store the this pointer
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// bind a focus handler for the guess text box
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this.$text.focus(function (e) {
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thisObj.handleTextFocus(e);
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return true;
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});
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// bind a keydown handler for the guess text box
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this.$text.keydown(function (e) {
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return thisObj.handleTextKeyDown(e);
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});
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||
|
|
// bind a keypress handler for the guess text box
|
||
|
|
this.$text.keypress(function (e) {
|
||
|
|
return thisObj.handleTextKeyPress(e);
|
||
|
|
});
|
||
|
|
|
||
|
|
// bind a click handler for the check guess button
|
||
|
|
this.$check.click(function (e) {
|
||
|
|
return thisObj.handleCheckClick(e);
|
||
|
|
});
|
||
|
|
|
||
|
|
// bind a click handler for the play again button
|
||
|
|
this.$again.click(function (e) {
|
||
|
|
return thisObj.handleAgainClick(e);
|
||
|
|
});
|
||
|
|
|
||
|
|
} // end bindHandlers()
|
||
|
|
|
||
|
|
//
|
||
|
|
// handleTextFocus() is a member function to process focus events for the guess text box
|
||
|
|
//
|
||
|
|
// @input (evt obj) evt is the event object associated with the keydown event
|
||
|
|
//
|
||
|
|
// @return N/A
|
||
|
|
//
|
||
|
|
guess.prototype.handleTextFocus = function(evt) {
|
||
|
|
|
||
|
|
// Select any text in the text box
|
||
|
|
this.$text.select();
|
||
|
|
|
||
|
|
} // end handleTextFocus()
|
||
|
|
|
||
|
|
//
|
||
|
|
// handleTextKeyDown() is a member function to process keydown events for the guess text box
|
||
|
|
//
|
||
|
|
// @input (evt obj) evt is the event object associated with the keydown event
|
||
|
|
//
|
||
|
|
// @return (boolean) false if consuming event, true if propagating
|
||
|
|
//
|
||
|
|
guess.prototype.handleTextKeyDown = function(evt) {
|
||
|
|
|
||
|
|
// do nothing if shift, alt, or ctrl key pressed.
|
||
|
|
if (evt.shiftKey || evt.altKey || evt.ctrlKey) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (evt.keyCode == this.keys.enter) {
|
||
|
|
|
||
|
|
// validate the guess
|
||
|
|
if (this.validateGuess() == true) {
|
||
|
|
|
||
|
|
// increment the guess count
|
||
|
|
this.guessCount++;
|
||
|
|
|
||
|
|
// see if the player has won
|
||
|
|
if (this.checkGuess() == true) {
|
||
|
|
// disable the guess text box and the check guess button
|
||
|
|
this.$text.attr('disabled', 'true');
|
||
|
|
this.$check.attr('disabled', 'true');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
evt.stopPropagation;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
|
||
|
|
} // end handleTextKeyDown()
|
||
|
|
|
||
|
|
//
|
||
|
|
// handleTextKeyPress() is a member function to process keypress events for the guess text box. This function
|
||
|
|
// is included to handle browsers that perform window scrolling, etc. on keypress rather than keydown.
|
||
|
|
//
|
||
|
|
// @input (evt obj) evt is the event object associated with the keypress event
|
||
|
|
//
|
||
|
|
// @return (boolean) false if consuming event, true if propagating
|
||
|
|
//
|
||
|
|
guess.prototype.handleTextKeyPress = function(evt) {
|
||
|
|
|
||
|
|
// do nothing if shift, alt, or ctrl key pressed.
|
||
|
|
if (evt.shiftKey || evt.altKey || evt.ctrlKey) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (evt.keyCode == this.enterKey) {
|
||
|
|
|
||
|
|
// consume the event
|
||
|
|
evt.stopPropagation;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
|
||
|
|
} // end handleTextKeyPress()
|
||
|
|
|
||
|
|
//
|
||
|
|
// handleCheckClick() is a member function to process click events for the check guess button
|
||
|
|
//
|
||
|
|
// @input (evt obj) evt is the event object associated with the click event
|
||
|
|
//
|
||
|
|
// @return (boolean) false if consuming event, true if propagating
|
||
|
|
//
|
||
|
|
guess.prototype.handleCheckClick = function(evt) {
|
||
|
|
|
||
|
|
// do nothing if shift, alt, or ctrl key pressed.
|
||
|
|
if (evt.shiftKey || evt.altKey || evt.ctrlKey) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// validate the guess
|
||
|
|
if (this.validateGuess() == true) {
|
||
|
|
|
||
|
|
// increment the guess count
|
||
|
|
this.guessCount++;
|
||
|
|
|
||
|
|
// see if the player has won
|
||
|
|
if (this.checkGuess() == true) {
|
||
|
|
// disable the guess text box and the check guess button
|
||
|
|
this.$text.attr('disabled', 'true');
|
||
|
|
this.$check.attr('disabled', 'true');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
evt.stopPropagation;
|
||
|
|
return false;
|
||
|
|
|
||
|
|
} // end handleCheckClick()
|
||
|
|
|
||
|
|
//
|
||
|
|
// handleAgainClick() is a member function to process click events for the play again button
|
||
|
|
//
|
||
|
|
// @input (evt obj) evt is the event object associated with the click event
|
||
|
|
//
|
||
|
|
// @return (boolean) false if consuming event, true if propagating
|
||
|
|
//
|
||
|
|
guess.prototype.handleAgainClick = function(evt) {
|
||
|
|
|
||
|
|
// do nothing if shift, alt, or ctrl key pressed.
|
||
|
|
if (evt.shiftKey || evt.altKey || evt.ctrlKey) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Setup a new game
|
||
|
|
this.newGame();
|
||
|
|
|
||
|
|
evt.stopPropagation;
|
||
|
|
return false;
|
||
|
|
|
||
|
|
} // end handleTextKeyDown()
|
||
|
|
|
||
|
|
//
|
||
|
|
// validateGuess() is a member function to validate a player's guess. If the guess is not a number, is less than
|
||
|
|
// the minimum allowed guess, or is greater than the maximum allowed guess, the user is warned that the guess is invalid
|
||
|
|
//
|
||
|
|
// @return (boolean) true if guess is valid; false if guess is invalid
|
||
|
|
//
|
||
|
|
guess.prototype.validateGuess = function() {
|
||
|
|
var val = this.$text.val();
|
||
|
|
|
||
|
|
if (this.$text.val() == '') {
|
||
|
|
// guess is empty
|
||
|
|
this.$text.attr('aria-invalid', 'true');
|
||
|
|
this.alertDlg.showMsg('You must enter a number!', this.$text);
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
else if (isNaN(val) == true) {
|
||
|
|
|
||
|
|
// guess is not a number
|
||
|
|
this.$text.attr('aria-invalid', 'true');
|
||
|
|
this.alertDlg.showMsg('\'' + this.$text.val() + '\' is not a number!', this.$text);
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
else if (val < this.minGuess || val > this.maxGuess) {
|
||
|
|
|
||
|
|
// guess is out of range
|
||
|
|
this.$text.attr('aria-invalid', 'true');
|
||
|
|
this.alertDlg.showMsg('You must choose a number between ' + this.minGuess + ' and ' + this.maxGuess + '!', this.$text);
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
this.$text.attr('aria-invalid', 'false');
|
||
|
|
|
||
|
|
return true;
|
||
|
|
|
||
|
|
} // end validateGuess()
|
||
|
|
|
||
|
|
//
|
||
|
|
// checkGuess() is a member function to check the player's guess to see if he or she has won the game
|
||
|
|
//
|
||
|
|
// @return (boolean) true if the player has won; false if not
|
||
|
|
guess.prototype.checkGuess = function() {
|
||
|
|
|
||
|
|
var guess = this.$text.val();
|
||
|
|
|
||
|
|
if (guess == this.guessVal) {
|
||
|
|
|
||
|
|
// The player has won. Tell the player how many tries it took
|
||
|
|
|
||
|
|
if (this.guessCount == 1) {
|
||
|
|
this.alertDlg.showMsg('\'' + guess + '\' is right. You got it on your first try!', this.$again);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
this.alertDlg.showMsg('\'' + guess + '\' is right. It only took you ' + this.guessCount + ' tries!', this.$again);
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Player did not guess the correct number. Tell the player if he or she is too high or too low
|
||
|
|
if (guess < this.guessVal) {
|
||
|
|
this.alertDlg.showMsg('\'' + guess + '\' is too low. Try a higher number.', this.$text);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
this.alertDlg.showMsg('\'' + guess + '\' is too high. Try a lower number.', this.$text);
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
|
||
|
|
} // end checkGuess()
|
||
|
|
</script>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div role="application">
|
||
|
|
|
||
|
|
<div id="guess1" class="guess">
|
||
|
|
|
||
|
|
<h2>Number Guessing Game</h2>
|
||
|
|
|
||
|
|
<p><strong>Instructions:</strong> In this game you guess a number between 1 an 10 and then press the "Check My Guess" button to check your responses.
|
||
|
|
An <abbr title="Accessible Rich Internet Application">ARIA</abbr> dialog box will display the results of your guess. To start over again to press the "Play Again" button.</p>
|
||
|
|
|
||
|
|
<p class="input">
|
||
|
|
<label id="guess1_label" for="guess1_text">Guess a number between 1 and 10</label>
|
||
|
|
<input type="text" id="guess1_text" size="3" aria-labelledby="guess1_label" aria-invalid="false">
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<p class="input">
|
||
|
|
<input class="button" id="guess1_check" type="button" value="Check My Guess"/>
|
||
|
|
<input class="button" id="guess1_again" type="button" value="Play Again"/>
|
||
|
|
</p>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|