<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>samegame.js Example File | Qt Quick 5.9</title>
<link rel="stylesheet" type="text/css" href="style/offline-simple.css" />
<script type="text/javascript">
document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css");
// loading style sheet breaks anchors that were jumped to before
// so force jumping to anchor again
setTimeout(function() {
var anchor = location.hash;
// need to jump to different anchor first (e.g. none)
location.hash = "#";
setTimeout(function() {
location.hash = anchor;
}, 0);
}, 0);
</script>
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<table><tr>
<td >Qt 5.9</td><td ><a href="qtquick-index.html">Qt Quick</a></td><td ><a href="qtquick-tutorials-samegame-samegame2-example.html">QML Advanced Tutorial 2 - Populating the Game Canvas</a></td><td >samegame.js Example File</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
</tr></table>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">samegame.js Example File</h1>
<span class="subtitle">tutorials/samegame/samegame2/samegame.js</span>
<!-- $$$tutorials/samegame/samegame2/samegame.js-description -->
<div class="descr"> <a name="details"></a>
<pre class="js">
var <span class="name">blockSize</span> = <span class="number">40</span>;
var <span class="name">maxColumn</span> = <span class="number">10</span>;
var <span class="name">maxRow</span> = <span class="number">15</span>;
var <span class="name">maxIndex</span> = <span class="name">maxColumn</span> <span class="operator">*</span> <span class="name">maxRow</span>;
var <span class="name">board</span> = new <span class="name">Array</span>(<span class="name">maxIndex</span>);
var <span class="name">component</span>;
<span class="comment">//Index function used instead of a 2D array</span>
<span class="keyword">function</span> <span class="name">index</span>(<span class="name">column</span>, row) {
<span class="keyword">return</span> <span class="name">column</span> <span class="operator">+</span> (<span class="name">row</span> <span class="operator">*</span> <span class="name">maxColumn</span>);
}
<span class="keyword">function</span> <span class="name">startNewGame</span>() {
<span class="comment">//Delete blocks from previous game</span>
<span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span> = <span class="number">0</span>; <span class="name">i</span> <span class="operator"><</span> <span class="name">maxIndex</span>; i++) {
<span class="keyword">if</span> (<span class="name">board</span>[<span class="name">i</span>] <span class="operator">!=</span> <span class="number">null</span>)
<span class="name">board</span>[<span class="name">i</span>].<span class="name">destroy</span>();
}
<span class="comment">//Calculate board size</span>
<span class="name">maxColumn</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">floor</span>(<span class="name">background</span>.<span class="name">width</span> <span class="operator">/</span> <span class="name">blockSize</span>);
<span class="name">maxRow</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">floor</span>(<span class="name">background</span>.<span class="name">height</span> <span class="operator">/</span> <span class="name">blockSize</span>);
<span class="name">maxIndex</span> <span class="operator">=</span> <span class="name">maxRow</span> <span class="operator">*</span> <span class="name">maxColumn</span>;
<span class="comment">//Initialize Board</span>
<span class="name">board</span> <span class="operator">=</span> new <span class="name">Array</span>(<span class="name">maxIndex</span>);
<span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">column</span> = <span class="number">0</span>; <span class="name">column</span> <span class="operator"><</span> <span class="name">maxColumn</span>; column++) {
<span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">row</span> = <span class="number">0</span>; <span class="name">row</span> <span class="operator"><</span> <span class="name">maxRow</span>; row++) {
<span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)] <span class="operator">=</span> <span class="number">null</span>;
<span class="name">createBlock</span>(<span class="name">column</span>, <span class="name">row</span>);
}
}
}
<span class="keyword">function</span> <span class="name">createBlock</span>(<span class="name">column</span>, row) {
<span class="keyword">if</span> (<span class="name">component</span> <span class="operator">==</span> <span class="number">null</span>)
<span class="name">component</span> <span class="operator">=</span> <span class="name">Qt</span>.<span class="name">createComponent</span>(<span class="string">"Block.qml"</span>);
<span class="comment">// Note that if Block.qml was not a local file, component.status would be</span>
<span class="comment">// Loading and we should wait for the component's statusChanged() signal to</span>
<span class="comment">// know when the file is downloaded and ready before calling createObject().</span>
<span class="keyword">if</span> (<span class="name">component</span>.<span class="name">status</span> <span class="operator">==</span> <span class="name">Component</span>.<span class="name">Ready</span>) {
var <span class="name">dynamicObject</span> = <span class="name">component</span>.<span class="name">createObject</span>(<span class="name">background</span>);
<span class="keyword">if</span> (<span class="name">dynamicObject</span> <span class="operator">==</span> <span class="number">null</span>) {
<span class="name">console</span>.<span class="name">log</span>(<span class="string">"error creating block"</span>);
<span class="name">console</span>.<span class="name">log</span>(<span class="name">component</span>.<span class="name">errorString</span>());
<span class="keyword">return</span> <span class="number">false</span>;
}
<span class="name">dynamicObject</span>.<span class="name">x</span> <span class="operator">=</span> <span class="name">column</span> <span class="operator">*</span> <span class="name">blockSize</span>;
<span class="name">dynamicObject</span>.<span class="name">y</span> <span class="operator">=</span> <span class="name">row</span> <span class="operator">*</span> <span class="name">blockSize</span>;
<span class="name">dynamicObject</span>.<span class="name">width</span> <span class="operator">=</span> <span class="name">blockSize</span>;
<span class="name">dynamicObject</span>.<span class="name">height</span> <span class="operator">=</span> <span class="name">blockSize</span>;
<span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)] <span class="operator">=</span> <span class="name">dynamicObject</span>;
} <span class="keyword">else</span> {
<span class="name">console</span>.<span class="name">log</span>(<span class="string">"error loading block component"</span>);
<span class="name">console</span>.<span class="name">log</span>(<span class="name">component</span>.<span class="name">errorString</span>());
<span class="keyword">return</span> <span class="number">false</span>;
}
<span class="keyword">return</span> <span class="number">true</span>;
}
</pre>
</div>
<!-- @@@tutorials/samegame/samegame2/samegame.js -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. </p>
</div>
</body>
</html>
