<?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-samegame3-example.html">QML Advanced Tutorial 3 - Implementing the Game Logic</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/samegame3/samegame.js</span> <!-- $$$tutorials/samegame/samegame3/samegame.js-description --> <div class="descr"> <a name="details"></a> <pre class="js"> <span class="comment">/* This script file handles the game logic */</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">//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">gameCanvas</span>.<span class="name">width</span> <span class="operator">/</span> <span class="name">gameCanvas</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">gameCanvas</span>.<span class="name">height</span> <span class="operator">/</span> <span class="name">gameCanvas</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">//Close dialogs</span> <span class="name">dialog</span>.<span class="name">hide</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="name">gameCanvas</span>.<span class="name">score</span> <span class="operator">=</span> <span class="number">0</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">gameCanvas</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">type</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">floor</span>(<span class="name">Math</span>.<span class="name">random</span>() <span class="operator">*</span> <span class="number">3</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">gameCanvas</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">gameCanvas</span>.<span class="name">blockSize</span>; <span class="name">dynamicObject</span>.<span class="name">width</span> <span class="operator">=</span> <span class="name">gameCanvas</span>.<span class="name">blockSize</span>; <span class="name">dynamicObject</span>.<span class="name">height</span> <span class="operator">=</span> <span class="name">gameCanvas</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>; } var <span class="name">fillFound</span>; <span class="comment">//Set after a floodFill call to the number of blocks found</span> var <span class="name">floodBoard</span>; <span class="comment">//Set to 1 if the floodFill reaches off that node</span> <span class="keyword">function</span> <span class="name">handleClick</span>(<span class="name">xPos</span>, yPos) { var <span class="name">column</span> = <span class="name">Math</span>.<span class="name">floor</span>(<span class="name">xPos</span> <span class="operator">/</span> <span class="name">gameCanvas</span>.<span class="name">blockSize</span>); var <span class="name">row</span> = <span class="name">Math</span>.<span class="name">floor</span>(<span class="name">yPos</span> <span class="operator">/</span> <span class="name">gameCanvas</span>.<span class="name">blockSize</span>); <span class="keyword">if</span> (<span class="name">column</span> <span class="operator">>=</span> <span class="name">maxColumn</span> <span class="operator">||</span> <span class="name">column</span> <span class="operator"><</span> <span class="number">0</span> <span class="operator">||</span> <span class="name">row</span> <span class="operator">>=</span> <span class="name">maxRow</span> <span class="operator">||</span> <span class="name">row</span> <span class="operator"><</span> <span class="number">0</span>) <span class="keyword">return</span>; <span class="keyword">if</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="number">null</span>) <span class="keyword">return</span>; <span class="comment">//If it's a valid block, remove it and all connected (does nothing if it's not connected)</span> <span class="name">floodFill</span>(<span class="name">column</span>, <span class="name">row</span>, -<span class="number">1</span>); <span class="keyword">if</span> (<span class="name">fillFound</span> <span class="operator"><=</span> <span class="number">0</span>) <span class="keyword">return</span>; <span class="name">gameCanvas</span>.<span class="name">score</span> <span class="operator">+=</span> (<span class="name">fillFound</span> <span class="operator">-</span> <span class="number">1</span>) <span class="operator">*</span> (<span class="name">fillFound</span> <span class="operator">-</span> <span class="number">1</span>); <span class="name">shuffleDown</span>(); <span class="name">victoryCheck</span>(); } <span class="keyword">function</span> <span class="name">floodFill</span>(<span class="name">column</span>, row, type) { <span class="keyword">if</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="number">null</span>) <span class="keyword">return</span>; var <span class="name">first</span> = <span class="number">false</span>; <span class="keyword">if</span> (<span class="name">type</span> <span class="operator">==</span> -<span class="number">1</span>) { <span class="name">first</span> <span class="operator">=</span> <span class="number">true</span>; <span class="name">type</span> <span class="operator">=</span> <span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)].<span class="name">type</span>; <span class="comment">//Flood fill initialization</span> <span class="name">fillFound</span> <span class="operator">=</span> <span class="number">0</span>; <span class="name">floodBoard</span> <span class="operator">=</span> new <span class="name">Array</span>(<span class="name">maxIndex</span>); } <span class="keyword">if</span> (<span class="name">column</span> <span class="operator">>=</span> <span class="name">maxColumn</span> <span class="operator">||</span> <span class="name">column</span> <span class="operator"><</span> <span class="number">0</span> <span class="operator">||</span> <span class="name">row</span> <span class="operator">>=</span> <span class="name">maxRow</span> <span class="operator">||</span> <span class="name">row</span> <span class="operator"><</span> <span class="number">0</span>) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">floodBoard</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)] <span class="operator">==</span> <span class="number">1</span> <span class="operator">||</span> (!<span class="name">first</span> <span class="operator">&&</span> <span class="name">type</span> <span class="operator">!=</span> <span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)].<span class="name">type</span>)) <span class="keyword">return</span>; <span class="name">floodBoard</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)] <span class="operator">=</span> <span class="number">1</span>; <span class="name">floodFill</span>(<span class="name">column</span> <span class="operator">+</span> <span class="number">1</span>, <span class="name">row</span>, <span class="name">type</span>); <span class="name">floodFill</span>(<span class="name">column</span> <span class="operator">-</span> <span class="number">1</span>, <span class="name">row</span>, <span class="name">type</span>); <span class="name">floodFill</span>(<span class="name">column</span>, <span class="name">row</span> <span class="operator">+</span> <span class="number">1</span>, <span class="name">type</span>); <span class="name">floodFill</span>(<span class="name">column</span>, <span class="name">row</span> <span class="operator">-</span> <span class="number">1</span>, <span class="name">type</span>); <span class="keyword">if</span> (<span class="name">first</span> <span class="operator">==</span> <span class="number">true</span> <span class="operator">&&</span> <span class="name">fillFound</span> <span class="operator">==</span> <span class="number">0</span>) <span class="keyword">return</span>; <span class="comment">//Can't remove single blocks</span> <span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)].<span class="name">opacity</span> <span class="operator">=</span> <span class="number">0</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="number">null</span>; <span class="name">fillFound</span> <span class="operator">+=</span> <span class="number">1</span>; } <span class="keyword">function</span> <span class="name">shuffleDown</span>() { <span class="comment">//Fall down</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++) { var <span class="name">fallDist</span> = <span class="number">0</span>; <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">row</span> = <span class="name">maxRow</span> <span class="operator">-</span> <span class="number">1</span>; <span class="name">row</span> <span class="operator">>=</span> <span class="number">0</span>; row--) { <span class="keyword">if</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="number">null</span>) { <span class="name">fallDist</span> <span class="operator">+=</span> <span class="number">1</span>; } <span class="keyword">else</span> { <span class="keyword">if</span> (<span class="name">fallDist</span> <span class="operator">></span> <span class="number">0</span>) { var <span class="name">obj</span> = <span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)]; <span class="name">obj</span>.<span class="name">y</span> <span class="operator">+=</span> <span class="name">fallDist</span> <span class="operator">*</span> <span class="name">gameCanvas</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">fallDist</span>)] <span class="operator">=</span> <span class="name">obj</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="number">null</span>; } } } } <span class="comment">//Fall to the left</span> var <span class="name">fallDist</span> = <span class="number">0</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">if</span> (<span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">maxRow</span> <span class="operator">-</span> <span class="number">1</span>)] <span class="operator">==</span> <span class="number">null</span>) { <span class="name">fallDist</span> <span class="operator">+=</span> <span class="number">1</span>; } <span class="keyword">else</span> { <span class="keyword">if</span> (<span class="name">fallDist</span> <span class="operator">></span> <span class="number">0</span>) { <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++) { var <span class="name">obj</span> = <span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)]; <span class="keyword">if</span> (<span class="name">obj</span> <span class="operator">==</span> <span class="number">null</span>) <span class="keyword">continue</span>; <span class="name">obj</span>.<span class="name">x</span> <span class="operator">-=</span> <span class="name">fallDist</span> <span class="operator">*</span> <span class="name">gameCanvas</span>.<span class="name">blockSize</span>; <span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span> <span class="operator">-</span> <span class="name">fallDist</span>, <span class="name">row</span>)] <span class="operator">=</span> <span class="name">obj</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="number">null</span>; } } } } } <span class="keyword">function</span> <span class="name">victoryCheck</span>() { <span class="comment">//Award bonus points if no blocks left</span> var <span class="name">deservesBonus</span> = <span class="number">true</span>; <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">column</span> = <span class="name">maxColumn</span> <span class="operator">-</span> <span class="number">1</span>; <span class="name">column</span> <span class="operator">>=</span> <span class="number">0</span>; column--) <span class="keyword">if</span> (<span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">maxRow</span> <span class="operator">-</span> <span class="number">1</span>)] <span class="operator">!=</span> <span class="number">null</span>) <span class="name">deservesBonus</span> <span class="operator">=</span> <span class="number">false</span>; <span class="keyword">if</span> (<span class="name">deservesBonus</span>) <span class="name">gameCanvas</span>.<span class="name">score</span> <span class="operator">+=</span> <span class="number">500</span>; <span class="comment">//Check whether game has finished</span> <span class="keyword">if</span> (<span class="name">deservesBonus</span> <span class="operator">||</span> !(<span class="name">floodMoveCheck</span>(<span class="number">0</span>, <span class="name">maxRow</span> <span class="operator">-</span> <span class="number">1</span>, -<span class="number">1</span>))) <span class="name">dialog</span>.<span class="name">show</span>(<span class="string">"Game Over. Your score is "</span> <span class="operator">+</span> <span class="name">gameCanvas</span>.<span class="name">score</span>); } <span class="comment">//only floods up and right, to see if it can find adjacent same-typed blocks</span> <span class="keyword">function</span> <span class="name">floodMoveCheck</span>(<span class="name">column</span>, row, type) { <span class="keyword">if</span> (<span class="name">column</span> <span class="operator">>=</span> <span class="name">maxColumn</span> <span class="operator">||</span> <span class="name">column</span> <span class="operator"><</span> <span class="number">0</span> <span class="operator">||</span> <span class="name">row</span> <span class="operator">>=</span> <span class="name">maxRow</span> <span class="operator">||</span> <span class="name">row</span> <span class="operator"><</span> <span class="number">0</span>) <span class="keyword">return</span> <span class="number">false</span>; <span class="keyword">if</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="number">null</span>) <span class="keyword">return</span> <span class="number">false</span>; var <span class="name">myType</span> = <span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)].<span class="name">type</span>; <span class="keyword">if</span> (<span class="name">type</span> <span class="operator">==</span> <span class="name">myType</span>) <span class="keyword">return</span> <span class="number">true</span>; <span class="keyword">return</span> <span class="name">floodMoveCheck</span>(<span class="name">column</span> <span class="operator">+</span> <span class="number">1</span>, <span class="name">row</span>, <span class="name">myType</span>) <span class="operator">||</span> <span class="name">floodMoveCheck</span>(<span class="name">column</span>, <span class="name">row</span> <span class="operator">-</span> <span class="number">1</span>, <span class="name">board</span>[<span class="name">index</span>(<span class="name">column</span>, <span class="name">row</span>)].<span class="name">type</span>); } </pre> </div> <!-- @@@tutorials/samegame/samegame3/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>