660 lines
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660 lines
23 KiB
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<div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">com.mxgraph.canvas</a></div>
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<h2 title="Class mxBasicCanvas" class="title">Class mxBasicCanvas</h2>
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<li>java.lang.Object</li>
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<li>com.mxgraph.canvas.mxBasicCanvas</li>
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<dt>Direct Known Subclasses:</dt>
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<dd><code><a href="mxGraphics2DCanvas.html" title="class in com.mxgraph.canvas">mxGraphics2DCanvas</a></code>, <code><a href="mxHtmlCanvas.html" title="class in com.mxgraph.canvas">mxHtmlCanvas</a></code>, <code><a href="mxSvgCanvas.html" title="class in com.mxgraph.canvas">mxSvgCanvas</a></code>, <code><a href="mxVmlCanvas.html" title="class in com.mxgraph.canvas">mxVmlCanvas</a></code></dd>
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<pre>public abstract class <span class="typeNameLabel">mxBasicCanvas</span>
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extends java.lang.Object
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implements <a href="mxICanvas.html" title="interface in com.mxgraph.canvas">mxICanvas</a></pre>
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<caption><span>Fields</span><span class="tabEnd"> </span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colSecond" scope="col">Field</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static java.lang.String</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#DEFAULT_IMAGEBASEPATH">DEFAULT_IMAGEBASEPATH</a></span></code></th>
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<td class="colLast">
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<div class="block">Defines the default value for the imageBasePath in all GDI canvases.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>protected boolean</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#drawLabels">drawLabels</a></span></code></th>
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<td class="colLast">
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<div class="block">Specifies whether labels should be painted.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>protected java.lang.String</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#imageBasePath">imageBasePath</a></span></code></th>
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<td class="colLast">
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<div class="block">Defines the base path for images with relative paths.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>protected java.util.Hashtable<java.lang.String,​java.awt.image.BufferedImage></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#imageCache">imageCache</a></span></code></th>
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<td class="colLast">
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<div class="block">Cache for images.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static boolean</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#PRESERVE_IMAGE_ASPECT">PRESERVE_IMAGE_ASPECT</a></span></code></th>
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<td class="colLast">
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<div class="block">Specifies if image aspect should be preserved in drawImage.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>protected double</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#scale">scale</a></span></code></th>
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<td class="colLast">
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<div class="block">Specifies the current scale.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>protected <a href="../util/mxPoint.html" title="class in com.mxgraph.util">mxPoint</a></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#translate">translate</a></span></code></th>
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<td class="colLast">
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<div class="block">Specifies the current translation.</div>
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</td>
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</tr>
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</table>
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</li>
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</ul>
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
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<th class="colFirst" scope="col">Constructor</th>
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<th class="colLast" scope="col">Description</th>
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<tr class="altColor">
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">mxBasicCanvas</a></span>()</code></th>
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<td class="colLast"> </td>
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<h3>Method Summary</h3>
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<table class="memberSummary">
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colSecond" scope="col">Method</th>
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<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#flushImageCache()">flushImageCache</a></span>()</code></th>
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<td class="colLast"> </td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code>java.lang.String</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getImageBasePath()">getImageBasePath</a></span>()</code></th>
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<td class="colLast"> </td>
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</tr>
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<tr id="i2" class="altColor">
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<td class="colFirst"><code>java.lang.String</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getImageForStyle(java.util.Map)">getImageForStyle</a></span>​(java.util.Map<java.lang.String,​java.lang.Object> style)</code></th>
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<td class="colLast">
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<div class="block">Gets the image path from the given style.</div>
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</td>
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</tr>
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<tr id="i3" class="rowColor">
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<td class="colFirst"><code>double</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getScale()">getScale</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Returns the scale.</div>
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</td>
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</tr>
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<tr id="i4" class="altColor">
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<td class="colFirst"><code><a href="../util/mxPoint.html" title="class in com.mxgraph.util">mxPoint</a></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTranslate()">getTranslate</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Returns the current translate.</div>
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</td>
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</tr>
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<tr id="i5" class="rowColor">
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<td class="colFirst"><code>boolean</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isDrawLabels()">isDrawLabels</a></span>()</code></th>
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<td class="colLast"> </td>
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</tr>
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<tr id="i6" class="altColor">
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<td class="colFirst"><code>java.awt.image.BufferedImage</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#loadImage(java.lang.String)">loadImage</a></span>​(java.lang.String image)</code></th>
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<td class="colLast">
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<div class="block">Returns an image instance for the given URL.</div>
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</td>
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</tr>
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<tr id="i7" class="rowColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setDrawLabels(boolean)">setDrawLabels</a></span>​(boolean drawLabels)</code></th>
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<td class="colLast"> </td>
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</tr>
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<tr id="i8" class="altColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setImageBasePath(java.lang.String)">setImageBasePath</a></span>​(java.lang.String imageBasePath)</code></th>
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<td class="colLast"> </td>
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</tr>
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<tr id="i9" class="rowColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setScale(double)">setScale</a></span>​(double scale)</code></th>
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<td class="colLast">
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<div class="block">Sets the scale for the following drawing requests.</div>
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</td>
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</tr>
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<tr id="i10" class="altColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setTranslate(double,double)">setTranslate</a></span>​(double dx,
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double dy)</code></th>
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<td class="colLast">
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<div class="block">Sets the current translate.</div>
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<h3>Methods inherited from class java.lang.Object</h3>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h3>Methods inherited from interface com.mxgraph.canvas.<a href="mxICanvas.html" title="interface in com.mxgraph.canvas">mxICanvas</a></h3>
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<code><a href="mxICanvas.html#drawCell(com.mxgraph.view.mxCellState)">drawCell</a>, <a href="mxICanvas.html#drawLabel(java.lang.String,com.mxgraph.view.mxCellState,boolean)">drawLabel</a></code></li>
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<h3>Field Detail</h3>
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<h4>PRESERVE_IMAGE_ASPECT</h4>
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<pre>public static boolean PRESERVE_IMAGE_ASPECT</pre>
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<div class="block">Specifies if image aspect should be preserved in drawImage. Default is true.</div>
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<h4>DEFAULT_IMAGEBASEPATH</h4>
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<pre>public static java.lang.String DEFAULT_IMAGEBASEPATH</pre>
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<div class="block">Defines the default value for the imageBasePath in all GDI canvases.
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Default is an empty string.</div>
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<h4>imageBasePath</h4>
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<pre>protected java.lang.String imageBasePath</pre>
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<div class="block">Defines the base path for images with relative paths. Trailing slash
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is required. Default value is DEFAULT_IMAGEBASEPATH.</div>
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<h4>translate</h4>
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<pre>protected <a href="../util/mxPoint.html" title="class in com.mxgraph.util">mxPoint</a> translate</pre>
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<div class="block">Specifies the current translation. Default is (0,0).</div>
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<h4>scale</h4>
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<pre>protected double scale</pre>
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<div class="block">Specifies the current scale. Default is 1.</div>
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<pre>protected boolean drawLabels</pre>
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<div class="block">Specifies whether labels should be painted. Default is true.</div>
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<pre>protected java.util.Hashtable<java.lang.String,​java.awt.image.BufferedImage> imageCache</pre>
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<pre>public mxBasicCanvas()</pre>
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<pre class="methodSignature">public void setTranslate​(double dx,
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<div class="block">Sets the current translate.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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<dd><code><a href="mxICanvas.html#setTranslate(double,double)">setTranslate</a></code> in interface <code><a href="mxICanvas.html" title="interface in com.mxgraph.canvas">mxICanvas</a></code></dd>
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<pre class="methodSignature">public <a href="../util/mxPoint.html" title="class in com.mxgraph.util">mxPoint</a> getTranslate()</pre>
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<div class="block">Returns the current translate.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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<dd><code><a href="mxICanvas.html#getTranslate()">getTranslate</a></code> in interface <code><a href="mxICanvas.html" title="interface in com.mxgraph.canvas">mxICanvas</a></code></dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>Returns the current translation.</dd>
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<pre class="methodSignature">public void setScale​(double scale)</pre>
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<div class="block">Sets the scale for the following drawing requests.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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<dd><code><a href="mxICanvas.html#setScale(double)">setScale</a></code> in interface <code><a href="mxICanvas.html" title="interface in com.mxgraph.canvas">mxICanvas</a></code></dd>
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<pre class="methodSignature">public double getScale()</pre>
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<div class="block">Returns the scale.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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<dd><code><a href="mxICanvas.html#getScale()">getScale</a></code> in interface <code><a href="mxICanvas.html" title="interface in com.mxgraph.canvas">mxICanvas</a></code></dd>
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<pre class="methodSignature">public void setDrawLabels​(boolean drawLabels)</pre>
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<pre class="methodSignature">public java.lang.String getImageBasePath()</pre>
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<pre class="methodSignature">public void setImageBasePath​(java.lang.String imageBasePath)</pre>
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<pre class="methodSignature">public boolean isDrawLabels()</pre>
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<pre class="methodSignature">public java.awt.image.BufferedImage loadImage​(java.lang.String image)</pre>
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<div class="block">Returns an image instance for the given URL. If the URL has
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been loaded before than an instance of the same instance is
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returned as in the previous call.</div>
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<pre class="methodSignature">public void flushImageCache()</pre>
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<pre class="methodSignature">public java.lang.String getImageForStyle​(java.util.Map<java.lang.String,​java.lang.Object> style)</pre>
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<div class="block">Gets the image path from the given style. If the path is relative (does
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not start with a slash) then it is appended to the imageBasePath.</div>
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