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| <div class="sub-title"><span class="module-label-in-type">Module</span> <a href="../../../../../module-summary.html">org.apache.sis.gui</a></div> |
| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.sis.gui.map</a></div> |
| <h1 title="Class MapCanvas.Renderer" class="title">Class MapCanvas.Renderer</h1> |
| </div> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a> |
| <div class="inheritance">Renderer</div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><code><a href="MapCanvasAWT.Renderer.html" title="class in org.apache.sis.gui.map">MapCanvasAWT.Renderer</a></code></dd> |
| </dl> |
| <dl class="notes"> |
| <dt>Enclosing class:</dt> |
| <dd><code><a href="MapCanvas.html" title="class in org.apache.sis.gui.map">MapCanvas</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="modifiers">protected abstract static class </span><span class="element-name type-name-label">MapCanvas.Renderer</span> |
| <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span></div> |
| <div class="block">A snapshot of <a href="MapCanvas.html" title="class in org.apache.sis.gui.map"><code>MapCanvas</code></a> state to render as a map, together with rendering code. |
| This class is instantiated and used as below: |
| |
| <ol> |
| <li><a href="MapCanvas.html" title="class in org.apache.sis.gui.map"><code>MapCanvas</code></a> invokes <a href="MapCanvas.html#createRenderer()"><code>MapCanvas.createRenderer()</code></a> in the JavaFX thread. |
| That method shall take a snapshot of every information needed for performing the rendering |
| in a background thread.</li> |
| <li><a href="MapCanvas.html" title="class in org.apache.sis.gui.map"><code>MapCanvas</code></a> invokes <a href="#render()"><code>render()</code></a> in a background thread. That method creates or |
| updates the nodes to show in the canvas but without reading or writing any canvas property; |
| that method should use only the snapshot taken in step 1.</li> |
| <li><a href="MapCanvas.html" title="class in org.apache.sis.gui.map"><code>MapCanvas</code></a> invokes <a href="#commit(org.apache.sis.gui.map.MapCanvas)"><code>commit(MapCanvas)</code></a> in the JavaFX thread. The nodes prepared |
| at step 2 can be transferred to <a href="MapCanvas.html#floatingPane"><code>MapCanvas.floatingPane</code></a> in that method.</li> |
| </ol></div> |
| <dl class="notes"> |
| <dt>Since:</dt> |
| <dd>1.1</dd> |
| </dl> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <li> |
| <section class="constructor-summary" id="constructor-summary"> |
| <h2>Constructor Summary</h2> |
| <div class="caption"><span>Constructors</span></div> |
| <div class="summary-table three-column-summary"> |
| <div class="table-header col-first">Modifier</div> |
| <div class="table-header col-second">Constructor</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>protected </code></div> |
| <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">Renderer</a>()</code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">Creates a new renderer.</div> |
| </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
| <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab3" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab3', 3)" class="table-tab">Abstract Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div> |
| <div id="method-summary-table.tabpanel" role="tabpanel"> |
| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>protected abstract boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#commit(org.apache.sis.gui.map.MapCanvas)" class="member-name-link">commit</a><wbr>(<a href="MapCanvas.html" title="class in org.apache.sis.gui.map">MapCanvas</a> canvas)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Invoked in JavaFX thread after <a href="#render()"><code>render()</code></a> completion.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getHeight()" class="member-name-link">getHeight</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Returns the height (number of rows) of the view, in pixels.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getWidth()" class="member-name-link">getWidth</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Returns the width (number of columns) of the view, in pixels.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>protected abstract void</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#render()" class="member-name-link">render</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Invoked in a background thread for rendering the map.</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-Object">Methods inherited from class <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>()"> |
| <h3>Renderer</h3> |
| <div class="member-signature"><span class="modifiers">protected</span> <span class="element-name">Renderer</span>()</div> |
| <div class="block">Creates a new renderer. The <a href="#getWidth()">width</a> and <a href="#getHeight()">height</a> |
| are initially zero; they will get a non-zero values before <a href="#render()"><code>render()</code></a> is invoked.</div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="getWidth()"> |
| <h3>getWidth</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name">getWidth</span>()</div> |
| <div class="block">Returns the width (number of columns) of the view, in pixels.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>number of pixels to render horizontally.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getHeight()"> |
| <h3>getHeight</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name">getHeight</span>()</div> |
| <div class="block">Returns the height (number of rows) of the view, in pixels.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>number of pixels to render vertically.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="render()"> |
| <h3>render</h3> |
| <div class="member-signature"><span class="modifiers">protected abstract</span> <span class="return-type">void</span> <span class="element-name">render</span>() |
| throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Exception.html" title="class or interface in java.lang" class="external-link">Exception</a></span></div> |
| <div class="block">Invoked in a background thread for rendering the map. This method should not access any |
| <a href="MapCanvas.html" title="class in org.apache.sis.gui.map"><code>MapCanvas</code></a> property; if some canvas properties are needed, they should have been |
| copied at construction time.</div> |
| <dl class="notes"> |
| <dt>Throws:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Exception.html" title="class or interface in java.lang" class="external-link">Exception</a></code> - if an error occurred while preparing data or rendering them.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="commit(org.apache.sis.gui.map.MapCanvas)"> |
| <h3>commit</h3> |
| <div class="member-signature"><span class="modifiers">protected abstract</span> <span class="return-type">boolean</span> <span class="element-name">commit</span><wbr><span class="parameters">(<a href="MapCanvas.html" title="class in org.apache.sis.gui.map">MapCanvas</a> canvas)</span></div> |
| <div class="block">Invoked in JavaFX thread after <a href="#render()"><code>render()</code></a> completion. This method can update the |
| <a href="MapCanvas.html#floatingPane"><code>MapCanvas.floatingPane</code></a> children with the nodes (images, shaped, <i>etc.</i>) created by |
| <a href="#render()"><code>render()</code></a>.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>canvas</code> - the canvas where drawing has been done.</dd> |
| <dt>Returns:</dt> |
| <dd><code>true</code> on success, or <code>false</code> if the rendering should be redone |
| (for example because a change has been detected in the data).</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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