scrawl-canvas

<!DOCTYPE html> <html> <head> <title>Demo Canvas 063</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="viewport" content="width=device-width, target-densitydpi=160dpi, initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"> <link rel="stylesheet" media="all" href="../docco.css" /> </head> <body> <div id="container"> <div id="background"></div> <ul id="jump_to"> <li> <a class="large" href="javascript:void(0);">Jump To …</a> <a class="small" href="javascript:void(0);">+</a> <div id="jump_wrapper"> <div id="jump_page_wrapper"> <div id="jump_page"> <a class="source" href="canvas-001.html"> ./demo/canvas-001.js </a> <a class="source" href="canvas-002.html"> ./demo/canvas-002.js </a> <a class="source" href="canvas-003.html"> ./demo/canvas-003.js </a> <a class="source" href="canvas-004.html"> ./demo/canvas-004.js </a> <a class="source" href="canvas-005.html"> ./demo/canvas-005.js </a> <a class="source" href="canvas-006.html"> ./demo/canvas-006.js </a> <a 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class="sswrap "> <a class="ss" href="#section-1">§</a> </div> <h1 id="demo-canvas-063">Demo Canvas 063</h1> <p>Semi-accessible Minimap; multiple drag zones</p> </div> </li> <li id="section-2"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-2">§</a> </div> <p><a href="../../demo/filters-063.html">Run code</a></p> </div> <div class="content"><div class='highlight'><pre><span class="hljs-keyword">import</span> * <span class="hljs-keyword">as</span> scrawl <span class="hljs-keyword">from</span> <span class="hljs-string">'../source/scrawl.js'</span>; <span class="hljs-keyword">import</span> { reportSpeed } <span class="hljs-keyword">from</span> <span class="hljs-string">'./utilities.js'</span>;</pre></div></div> </li> <li id="section-3"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-3">§</a> </div> <h4 id="scene-setup">Scene setup</h4> </div> <div class="content"><div class='highlight'><pre><span class="hljs-keyword">const</span> canvas = scrawl.<span class="hljs-property">library</span>.<span class="hljs-property">canvas</span>.<span class="hljs-property">mycanvas</span>; canvas.<span class="hljs-title function_">set</span>({ <span class="hljs-attr">includeInTabNavigation</span>: <span class="hljs-literal">true</span>, }).<span class="hljs-title function_">setBase</span>({</pre></div></div> </li> <li id="section-4"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-4">§</a> </div> <p>The base Cell needs to compile after the other Cells</p> </div> <div class="content"><div class='highlight'><pre> <span class="hljs-attr">compileOrder</span>: <span class="hljs-number">2</span> });</pre></div></div> </li> <li id="section-5"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-5">§</a> </div> <p>Magic numbers</p> </div> <div class="content"><div class='highlight'><pre><span class="hljs-keyword">const</span> mainDimensions = <span class="hljs-number">1600</span>; <span class="hljs-keyword">const</span> mapDimensions = <span class="hljs-number">200</span>; <span class="hljs-keyword">const</span> mainMapRatio = mainDimensions / mapDimensions; <span class="hljs-keyword">let</span> [displayWidth, displayHeight] = canvas.<span class="hljs-title function_">get</span>(<span class="hljs-string">"dimensions"</span>); <span class="hljs-keyword">let</span> frameWidth = (displayWidth / mainDimensions) * mapDimensions; <span class="hljs-keyword">let</span> frameHeight = (displayHeight / mainDimensions) * mapDimensions;</pre></div></div> </li> <li id="section-6"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-6">§</a> </div> <p>Build out the large Cell (1600px x 1600px)</p> <ul> <li>we don’t actually display this Cell</li> </ul> </div> <div class="content"><div class='highlight'><pre><span class="hljs-keyword">const</span> mainCell = canvas.<span class="hljs-title function_">buildCell</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"main-cell"</span>, <span class="hljs-attr">dimensions</span>: [mainDimensions, mainDimensions], <span class="hljs-attr">shown</span>: <span class="hljs-literal">false</span>, <span class="hljs-attr">compileOrder</span>: <span class="hljs-number">0</span>, <span class="hljs-attr">backgroundColor</span>: <span class="hljs-string">"ivory"</span> });</pre></div></div> </li> <li id="section-7"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-7">§</a> </div> <p>Populate the large Cell with some shapes</p> </div> <div class="content"><div class='highlight'><pre><span class="hljs-keyword">const</span> myColorFactory = scrawl.<span class="hljs-title function_">makeColor</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"my-color-factory"</span>, <span class="hljs-attr">minimumColor</span>: <span class="hljs-string">"orange"</span>, <span class="hljs-attr">maximumColor</span>: <span class="hljs-string">"green"</span> }); <span class="hljs-keyword">const</span> myCircleGroup = scrawl.<span class="hljs-title function_">makeGroup</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"my-circle-group"</span>, <span class="hljs-attr">host</span>: mainCell.<span class="hljs-property">name</span> }); <span class="hljs-keyword">for</span> (<span class="hljs-keyword">let</span> i = <span class="hljs-number">0</span>; i < <span class="hljs-number">50</span>; i++) { scrawl.<span class="hljs-title function_">makeWheel</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">`just-a-wheel-<span class="hljs-subst">${i}</span>`</span>, <span class="hljs-attr">group</span>: <span class="hljs-string">"my-circle-group"</span>, <span class="hljs-attr">startX</span>: <span class="hljs-number">50</span> + <span class="hljs-title class_">Math</span>.<span class="hljs-title function_">random</span>() * (mainDimensions - <span class="hljs-number">100</span>), <span class="hljs-attr">startY</span>: <span class="hljs-number">50</span> + <span class="hljs-title class_">Math</span>.<span class="hljs-title function_">random</span>() * (mainDimensions - <span class="hljs-number">100</span>), <span class="hljs-attr">radius</span>: <span class="hljs-number">20</span> + <span class="hljs-title class_">Math</span>.<span class="hljs-title function_">random</span>() * <span class="hljs-number">30</span>, <span class="hljs-attr">fillStyle</span>: myColorFactory.<span class="hljs-title function_">getRangeColor</span>(<span class="hljs-title class_">Math</span>.<span class="hljs-title function_">random</span>()), <span class="hljs-attr">method</span>: <span class="hljs-string">"fillThenDraw"</span> }); }</pre></div></div> </li> <li id="section-8"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-8">§</a> </div> <p>Display the large Cell in the base Cell</p> </div> <div class="content"><div class='highlight'><pre><span class="hljs-keyword">const</span> mainCellPicture = scrawl.<span class="hljs-title function_">makePicture</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"main-cell-picture"</span>, <span class="hljs-attr">group</span>: canvas.<span class="hljs-property">base</span>.<span class="hljs-property">name</span>, <span class="hljs-attr">asset</span>: <span class="hljs-string">"main-cell"</span>, <span class="hljs-attr">dimensions</span>: [displayWidth, displayHeight], <span class="hljs-attr">copyDimensions</span>: [displayWidth, displayHeight] });</pre></div></div> </li> <li id="section-9"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-9">§</a> </div> <p>Functionality to enable drag-drop on main Cell</p> </div> <div class="content"><div class='highlight'><pre>scrawl.<span class="hljs-title function_">makeDragZone</span>({ <span class="hljs-attr">zone</span>: canvas, <span class="hljs-attr">collisionGroup</span>: <span class="hljs-string">"my-circle-group"</span>, <span class="hljs-attr">coordinateSource</span>: mainCell, <span class="hljs-attr">endOn</span>: [<span class="hljs-string">"up"</span>, <span class="hljs-string">"leave"</span>], <span class="hljs-attr">preventTouchDefaultWhenDragging</span>: <span class="hljs-literal">true</span>, <span class="hljs-attr">processingOrder</span>: <span class="hljs-number">2</span>, });</pre></div></div> </li> <li id="section-10"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-10">§</a> </div> <p>Build out the smaller map Cell (200px x 200px)</p> <ul> <li>this will initially display in the top right corner</li> <li>it will be draggable too</li> </ul> </div> <div class="content"><div class='highlight'><pre><span class="hljs-keyword">const</span> pivotGroup = scrawl.<span class="hljs-title function_">makeGroup</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"map-pivot-group"</span>, <span class="hljs-attr">host</span>: canvas.<span class="hljs-property">base</span>.<span class="hljs-property">name</span> }); <span class="hljs-keyword">const</span> myMapPivot = scrawl.<span class="hljs-title function_">makeBlock</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"map-pivot"</span>, <span class="hljs-attr">group</span>: <span class="hljs-string">"map-pivot-group"</span>, <span class="hljs-attr">start</span>: [displayWidth - mapDimensions, <span class="hljs-number">0</span>], <span class="hljs-attr">dimensions</span>: [mapDimensions, mapDimensions], <span class="hljs-attr">method</span>: <span class="hljs-string">"none"</span> });</pre></div></div> </li> <li id="section-11"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-11">§</a> </div> <p>Functionality so we can drag-drop the map Cell around the base Cell</p> </div> <div class="content"><div class='highlight'><pre>scrawl.<span class="hljs-title function_">makeDragZone</span>({ <span class="hljs-attr">zone</span>: canvas, <span class="hljs-attr">collisionGroup</span>: <span class="hljs-string">"map-pivot-group"</span>, <span class="hljs-attr">coordinateSource</span>: canvas.<span class="hljs-property">base</span>, <span class="hljs-attr">endOn</span>: [<span class="hljs-string">"up"</span>, <span class="hljs-string">"leave"</span>], <span class="hljs-attr">preventTouchDefaultWhenDragging</span>: <span class="hljs-literal">true</span>, <span class="hljs-attr">processingOrder</span>: <span class="hljs-number">1</span>, }); <span class="hljs-keyword">const</span> mapCell = canvas.<span class="hljs-title function_">buildCell</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"map-cell"</span>, <span class="hljs-attr">dimensions</span>: [mapDimensions, mapDimensions],</pre></div></div> </li> <li id="section-12"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-12">§</a> </div> <p>We pivot the map Cell to the draggable Block entity</p> <ul> <li>wherever the Block goes, the map Cell will follow</li> </ul> </div> <div class="content"><div class='highlight'><pre> <span class="hljs-attr">pivot</span>: <span class="hljs-string">"map-pivot"</span>, <span class="hljs-attr">lockTo</span>: <span class="hljs-string">"pivot"</span>, <span class="hljs-attr">backgroundColor</span>: <span class="hljs-string">"white"</span>,</pre></div></div> </li> <li id="section-13"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-13">§</a> </div> <p>The map Cell needs to compile after the large Cell</p> </div> <div class="content"><div class='highlight'><pre> <span class="hljs-attr">compileOrder</span>: <span class="hljs-number">1</span> });</pre></div></div> </li> <li id="section-14"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-14">§</a> </div> <p>Now we can copy the large Cell into the map Cell</p> </div> <div class="content"><div class='highlight'><pre>scrawl.<span class="hljs-title function_">makePicture</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"map-cell-picture"</span>, <span class="hljs-attr">group</span>: <span class="hljs-string">"map-cell"</span>, <span class="hljs-attr">asset</span>: <span class="hljs-string">"main-cell"</span>, <span class="hljs-attr">dimensions</span>: [<span class="hljs-string">"100%"</span>, <span class="hljs-string">"100%"</span>], <span class="hljs-attr">copyDimensions</span>: [<span class="hljs-string">"100%"</span>, <span class="hljs-string">"100%"</span>], <span class="hljs-attr">lineWidth</span>: <span class="hljs-number">4</span>, <span class="hljs-attr">method</span>: <span class="hljs-string">"fillThenDraw"</span>, <span class="hljs-attr">globalAlpha</span>: <span class="hljs-number">0.5</span> });</pre></div></div> </li> <li id="section-15"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-15">§</a> </div> <p>Add the draggable map frame</p> </div> <div class="content"><div class='highlight'><pre><span class="hljs-keyword">const</span> myFrameGroup = scrawl.<span class="hljs-title function_">makeGroup</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"my-frame-group"</span>, <span class="hljs-attr">host</span>: mapCell.<span class="hljs-property">name</span> }); <span class="hljs-keyword">const</span> frame = scrawl.<span class="hljs-title function_">makeBlock</span>({ <span class="hljs-attr">name</span>: <span class="hljs-string">"my-frame"</span>, <span class="hljs-attr">group</span>: <span class="hljs-string">"my-frame-group"</span>, <span class="hljs-attr">dimensions</span>: [frameWidth, frameHeight], <span class="hljs-attr">strokeStyle</span>: <span class="hljs-string">"red"</span>, <span class="hljs-attr">lineWidth</span>: <span class="hljs-number">2</span>, <span class="hljs-attr">method</span>: <span class="hljs-string">"draw"</span> });</pre></div></div> </li> <li id="section-16"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-16">§</a> </div> <p>Functionality so we can drag-drop the frame around the map Cell</p> </div> <div class="content"><div class='highlight'><pre><span class="hljs-keyword">const</span> <span class="hljs-title function_">checkFrameDrag</span> = (<span class="hljs-params"></span>) => { <span class="hljs-keyword">if</span> (<span class="hljs-title function_">frameDragZone</span>()) { <span class="hljs-keyword">let</span> [x, y] = frame.<span class="hljs-title function_">get</span>(<span class="hljs-string">"position"</span>); <span class="hljs-keyword">let</span> newX = x * mainMapRatio, newY = y * mainMapRatio;</pre></div></div> </li> <li id="section-17"> <div class="annotation"> <div class="sswrap "> <a class="ss" href="#section-17">§</a> </div> <p>Adjust the position of the Picture wrt to the frame in the map</p> </div> <div class="content"><div class='highlight'><pre> mainCellPicture.<span class="hljs-title function_">set</span>({ <span class="hljs-attr">copyStartX</span>: newX, <span class="hljs-attr">copyStartY</span>: newY });</pre></div></div> </li> <li id="section-18"> <div class="annotation">