Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.g2d / src / org / simantics / g2d / multileveldiagram / ZoomTransitionParticipant.java

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/multileveldiagram/ZoomTransitionParticipant.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/multileveldiagram/ZoomTransitionParticipant.java
new file mode 100644 (file)
index 0000000..161885f
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/multileveldiagram/ZoomTransitionParticipant.java
@@ -0,0 +1,148 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.g2d.multileveldiagram;\r
+\r
+import java.awt.geom.AffineTransform;\r
+import java.util.List;\r
+\r
+import org.simantics.g2d.canvas.Hints;\r
+import org.simantics.g2d.canvas.ICanvasContext;\r
+import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;\r
+import org.simantics.g2d.canvas.impl.HintReflection.HintListener;\r
+import org.simantics.g2d.diagram.DiagramHints;\r
+import org.simantics.g2d.diagram.IDiagram;\r
+import org.simantics.g2d.diagram.impl.Diagram;\r
+import org.simantics.g2d.diagram.participant.AbstractDiagramParticipant;\r
+import org.simantics.g2d.multileveldiagram.LayerComposition.LayerInfo;\r
+import org.simantics.g2d.participant.TransformUtil;\r
+import org.simantics.g2d.utils.GeometryUtils;\r
+import org.simantics.utils.datastructures.hints.IHintListener;\r
+import org.simantics.utils.datastructures.hints.IHintObservable;\r
+import org.simantics.utils.datastructures.hints.IHintContext.Key;\r
+\r
+/**\r
+ * This participant changes the diagram according to zoom level.\r
+ * \r
+ * @author Toni Kalajainen\r
+ */\r
+public class ZoomTransitionParticipant extends AbstractDiagramParticipant {\r
+\r
+    @Dependency TransformUtil util;\r
+\r
+    /** Set dirty if transform changes */\r
+    @HintListener(Class=Hints.class, Field="KEY_CANVAS_TRANSFORM")\r
+    public void transformChanged(\r
+            IHintObservable sender,\r
+            Key key,\r
+            Object oldValue,\r
+            Object newValue)\r
+    {\r
+        if (composition==null) return;\r
+        if (newValue==null) return;\r
+        AffineTransform at = (AffineTransform) newValue;\r
+        _setZoom(at);\r
+    }\r
+\r
+    IHintListener compositeHintListener = new IHintListener() {\r
+        @Override\r
+        public void hintChanged(IHintObservable sender, Key key, Object oldValue, Object newValue) {\r
+            composition = (List<LayerInfo>) newValue;\r
+            AffineTransform at = util.getTransform();\r
+            _setZoom(at);\r
+        }\r
+\r
+        @Override\r
+        public void hintRemoved(IHintObservable sender, Key key, Object oldValue) {\r
+            composition = null;\r
+        }};\r
+\r
+        List<LayerInfo> composition;\r
+        TransitionFunction function;\r
+\r
+        public ZoomTransitionParticipant(TransitionFunction function) {\r
+            super();\r
+            this.function = function;\r
+        }\r
+\r
+        @Override\r
+        public void addedToContext(ICanvasContext ctx) {\r
+            AffineTransform at = ctx.getHintStack().getHint(Hints.KEY_CANVAS_TRANSFORM);\r
+            _setZoom(at);\r
+            super.addedToContext(ctx);\r
+        }\r
+\r
+\r
+        @Override\r
+        protected void onDiagramSet(IDiagram newDiagram, IDiagram oldDiagram) {\r
+            if (newDiagram==oldDiagram) return;\r
+            if (oldDiagram!=null && newDiagram==null && composition!=null&& oldDiagram.getHint(DiagramHints.KEY_LAYER_COMPOSITION)==composition) {\r
+                composition = null;\r
+                oldDiagram.removeKeyHintListener(DiagramHints.KEY_LAYER_COMPOSITION, compositeHintListener);\r
+            }\r
+            if (newDiagram!=null && composition==null && newDiagram.getHint(DiagramHints.KEY_LAYER_COMPOSITION)!=null) {\r
+                newDiagram.addKeyHintListener(DiagramHints.KEY_LAYER_COMPOSITION, compositeHintListener);\r
+                composition = newDiagram.getHint(DiagramHints.KEY_LAYER_COMPOSITION);\r
+            }\r
+            if (newDiagram != null && util!=null)\r
+                _setZoom(util.getTransform());\r
+        }\r
+\r
+        private void _setDiagramAndPhase(IDiagram d, Double newPhase)\r
+        {\r
+            Double oldPhase = diagram.getHint(TransitionDiagram.KEY_PHASE);\r
+            IDiagram currentDiagram = diagram;\r
+            IDiagram nextDiagram = d;\r
+            if (currentDiagram!=nextDiagram) {\r
+                setHint(DiagramHints.KEY_DIAGRAM, nextDiagram);\r
+                System.out.println("Switching to "+nextDiagram);\r
+                setDirty();\r
+            }\r
+            if (newPhase!=null) {\r
+                diagram.setHint(TransitionDiagram.KEY_PHASE, newPhase);\r
+                setDirty();\r
+            } else if (oldPhase!=null) {\r
+                diagram.removeHint(TransitionDiagram.KEY_PHASE);\r
+                setDirty();\r
+            }\r
+        }\r
+\r
+        private void _setZoom(double zoomLevel) {\r
+            if (composition==null) return;\r
+            IDiagram d = Diagram.EMPTY_DIAGRAM;\r
+            double phase = 0.0;\r
+            for (int i=0; i<composition.size(); i++)\r
+            {\r
+                LayerInfo li = composition.get(i);\r
+                if (li.ll>=zoomLevel && li.ul<=zoomLevel)\r
+                {\r
+                    d = li.diagram;\r
+                    phase = (zoomLevel - li.ul) / (li.ll - li.ul);\r
+                    phase = function.f(phase);\r
+                    phase = Math.min(phase, 1);\r
+                    phase = Math.max(phase, 0);\r
+                    break;\r
+                }\r
+            }\r
+            _setDiagramAndPhase(d, phase);\r
+        }\r
+\r
+        private void _setZoom(AffineTransform at) {\r
+            if (diagram==null) return;\r
+            if (at==null) {\r
+                _setZoom(1.0);\r
+                return;\r
+            }\r
+            double scale = GeometryUtils.getScale(at);\r
+            _setZoom(scale);\r
+        }\r
+\r
+}\r