Implement #1490 add postProcess() to Preview's Renderer

modules/PreviewAPI/src/main/java/org/gephi/preview/PreviewControllerImpl.java

@@ -191,7 +191,7 @@ public class PreviewControllerImpl implements PreviewController {
             }
         }
 
-        //Destrow view
+        //Destroy view
         if (previewModel.getProperties().getFloatValue(PreviewProperty.VISIBILITY_RATIO) < 1f) {
             graphModel.destroyView(graph.getView());
         }
@@ -245,6 +245,7 @@ public class PreviewControllerImpl implements PreviewController {
                 int tasks = 0;
                 for (Renderer r : renderers) {
                     if (!mousePressed || r instanceof MouseResponsiveRenderer) {
+                        tasks++;
                         for (String type : previewModel.getItemTypes()) {
                             for (Item item : previewModel.getItems(type)) {
                                 if (r.isRendererForitem(item, properties)) {
@@ -269,14 +270,21 @@ public class PreviewControllerImpl implements PreviewController {
                                 Progress.progress(progressTicket);
                                 if (target instanceof AbstractRenderTarget) {
                                     if (((AbstractRenderTarget) target).isCancelled()) {
+                                        Progress.finish(progressTicket);
                                         return;
                                     }
                                 }
                             }
                         }
                     }
+
+                    // Call post-process
+                    r.postProcess(previewModel, target, properties);
+                    Progress.progress(progressTicket);
                 }
             }
+
+            Progress.finish(progressTicket);
         }
     }
 

modules/PreviewAPI/src/main/java/org/gephi/preview/spi/Renderer.java

@@ -148,6 +148,17 @@ public interface Renderer {
      */
     void render(Item item, RenderTarget target, PreviewProperties properties);
 
+    /**
+     * This method is called after rendering all items to perform post-processing.
+     * <p>
+     * This method has access to the <code>model</code> but also to the <code>target</code> and <code>properties</code>.
+     *
+     * @param previewModel the model to get items from
+     * @param target     the target to render the item on
+     * @param properties the central properties
+     */
+    void postProcess(PreviewModel previewModel, RenderTarget target, PreviewProperties properties);
+
     /**
      * Returns all associated properties for this renderer. Properties can be built
      * using static <code>PreviewProperty.createProperty()</code> methods.

modules/PreviewPlugin/src/main/java/org/gephi/preview/plugin/renderers/ArrowRenderer.java

@@ -139,6 +139,10 @@ public class ArrowRenderer implements Renderer {
         }
     }
 
+    @Override
+    public void postProcess(PreviewModel previewModel, RenderTarget renderTarget, PreviewProperties properties) {
+    }
+
     @Override
     public CanvasSize getCanvasSize(
         final Item item,

modules/PreviewPlugin/src/main/java/org/gephi/preview/plugin/renderers/EdgeLabelRenderer.java

@@ -232,6 +232,10 @@ public class EdgeLabelRenderer implements Renderer {
         }
     }
 
+    @Override
+    public void postProcess(PreviewModel previewModel, RenderTarget renderTarget, PreviewProperties properties) {
+    }
+
     @Override
     public CanvasSize getCanvasSize(
         final Item item,

modules/PreviewPlugin/src/main/java/org/gephi/preview/plugin/renderers/EdgeRenderer.java

@@ -296,6 +296,10 @@ public class EdgeRenderer implements Renderer {
         }
     }
 
+    @Override
+    public void postProcess(PreviewModel previewModel, RenderTarget renderTarget, PreviewProperties properties) {
+    }
+
     @Override
     public CanvasSize getCanvasSize(Item item, PreviewProperties properties) {
         if (isSelfLoopEdge(item)) {

modules/PreviewPlugin/src/main/java/org/gephi/preview/plugin/renderers/NodeLabelRenderer.java

@@ -212,6 +212,10 @@ public class NodeLabelRenderer implements Renderer {
         }
     }
 
+    @Override
+    public void postProcess(PreviewModel previewModel, RenderTarget renderTarget, PreviewProperties properties) {
+    }
+
     @Override
     public CanvasSize getCanvasSize(
         final Item item,

modules/PreviewPlugin/src/main/java/org/gephi/preview/plugin/renderers/NodeRenderer.java

@@ -94,6 +94,10 @@ public class NodeRenderer implements Renderer {
         }
     }
 
+    @Override
+    public void postProcess(PreviewModel previewModel, RenderTarget renderTarget, PreviewProperties properties) {
+    }
+
     @Override
     public CanvasSize getCanvasSize(
         final Item item,

src/main/javadoc/overview.html

@@ -16,7 +16,7 @@
         <hr>
         <h2>API Changes</h2>
         <h3>0.9.3</h3>
-        <h4>Graph API (stable)</h4>
+        <h4>Graph API</h4>
         <ul>
             <li>Add <code>getEdges(int type)</code> to <code>Graph</code> to allow retrieval of only edges of a specific type.</li>
             <li>Add <code>getEdgeTypeLabels(boolean)</code> to <code>GraphModel</code>.</li>
@@ -30,7 +30,7 @@
             <li>Add <code>getElementIndex()</code> methods to <code>GraphModel</code> when providing a <code>Table</code>.</li>
             <li>Add <code>isNodeTable()</code> and <code>isEdgeTable()</code> methods to <code>Table</code>.</li>
         </ul>
-        <h4>Appearance API (unstable)</h4>
+        <h4>Appearance API (under development)</h4>
         <ul>
             <li><code>Partition</code> and <code>Ranking</code> now always receive the <code>Graph</code> as parameter for all methods that do need access to the underlying index to facilitate local scale support.</li>
             <li>Add <code>getColumn()</code> to <code>Ranking</code> so it aligns with <code>Partition</code>.</li>
@@ -42,6 +42,10 @@
             <li>Make <code>Function</code> getters in <code>AppearanceModel</code> independent from <code>Graph</code> as this should be handled automatically based on the local/global state.</li>
             <li>Only keep <code>getNodeFunctions()</code> and <code>getEdgeFunctions()</code> in <code>AppearanceModel</code> to keep it simple. Filtering can easily be achieved by the client instead.</li>
         </ul>
+        <h4>Preview API</h4>
+        <ul>
+            <li>A <code>postProcess()</code> method has been added to the <code>Renderer</code> SPI to allow customization once all items have been rendered.</li>
+        </ul>
         <h3>Archive</h3>
         <ul>
             <li>