Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.g2d / src / org / simantics / g2d / tooltip / TooltipParticipant.java

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/tooltip/TooltipParticipant.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/tooltip/TooltipParticipant.java
new file mode 100644 (file)
index 0000000..79345f1
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/tooltip/TooltipParticipant.java
@@ -0,0 +1,95 @@
+/*******************************************************************************\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.tooltip;\r
+\r
+import org.simantics.g2d.diagram.IDiagram;\r
+import org.simantics.g2d.diagram.IDiagram.CompositionListener;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.Clickable.PressStatus;\r
+import org.simantics.g2d.element.handler.impl.AbstractClickable;\r
+import org.simantics.utils.datastructures.hints.IHintContext.Key;\r
+import org.simantics.utils.datastructures.hints.IHintListener;\r
+import org.simantics.utils.datastructures.hints.IHintObservable;\r
+\r
+/**\r
+ * Tooltip support\r
+ * \r
+ * @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
+ *\r
+ */\r
+public class TooltipParticipant extends BaseTooltipParticipant implements CompositionListener {\r
+\r
+    private final ElementHoverListener listener = new ElementHoverListener();\r
+\r
+    public TooltipParticipant() {\r
+    }\r
+\r
+    @Override\r
+    protected void onDiagramSet(IDiagram newValue, IDiagram oldValue) {\r
+        if (oldValue == newValue)\r
+            return;\r
+        if (oldValue != null) {\r
+            for (IElement e : oldValue.getElements()) {\r
+                removeElement(e);\r
+            }\r
+            oldValue.removeCompositionListener(this);\r
+        }\r
+        if (newValue != null) {\r
+            for (IElement e : newValue.getElements()) {\r
+                addElement(e);\r
+            }\r
+            newValue.addCompositionListener(this);\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public void onElementAdded(IDiagram d, IElement e) {\r
+        addElement(e);\r
+    }\r
+\r
+    @Override\r
+    public void onElementRemoved(IDiagram d, IElement e) {\r
+        removeElement(e);\r
+    }\r
+\r
+    private void addElement(IElement e) {\r
+        e.addKeyHintListener(AbstractClickable.PRESS_STATUS_KEY, listener);\r
+    }\r
+\r
+    private void removeElement(IElement e) {\r
+        e.removeKeyHintListener(AbstractClickable.PRESS_STATUS_KEY, listener);\r
+    }\r
+\r
+\r
+\r
+    class ElementHoverListener implements IHintListener {\r
+\r
+        @Override\r
+        public void hintChanged(IHintObservable sender, Key key,\r
+                Object oldValue, Object newValue) {\r
+            IElement element = (IElement)sender;\r
+            PressStatus status = (PressStatus)newValue;\r
+            if (status == PressStatus.HOVER) {\r
+                showTooltipFor(element);\r
+            } else {\r
+                hideTooltip();\r
+            }\r
+            //System.out.println("ttp element changed " + element + " " + status);\r
+        }\r
+\r
+        @Override\r
+        public void hintRemoved(IHintObservable sender, Key key, Object oldValue) {\r
+\r
+        }\r
+    }\r
+\r
+}\r