Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.swt / src / org / simantics / browsing / ui / swt / ViewerCellReference.java

diff --git a/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/ViewerCellReference.java b/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/ViewerCellReference.java
new file mode 100644 (file)
index 0000000..39e318e
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/ViewerCellReference.java
@@ -0,0 +1,66 @@
+package org.simantics.browsing.ui.swt;\r
+\r
+import org.eclipse.jface.viewers.ViewerCell;\r
+import org.simantics.browsing.ui.common.internal.UIElementReference;\r
+\r
+/**\r
+ * "Reference" to a viewer cell.\r
+ * \r
+ * ViewerCell is an object, which is not immutable, and has a very short lifespan. Hence we store its element and columnIndex.\r
+ * \r
+ * \r
+ * @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
+ *\r
+ */\r
+public class ViewerCellReference implements UIElementReference{\r
+       \r
+       private final Object element;\r
+       private final int column;\r
+       \r
+       public static ViewerCellReference create(ViewerCell cell) {\r
+               return new ViewerCellReference(cell);\r
+       }\r
+       \r
+       private ViewerCellReference(ViewerCell cell) {\r
+               this.element = cell.getElement();\r
+               this.column = cell.getColumnIndex();\r
+       }\r
+       \r
+       @Override\r
+       public boolean hasReference() {\r
+               return element != null;\r
+       }\r
+       \r
+       @Override\r
+       public boolean isDisposed() {\r
+               if (element == null)\r
+                       return true;\r
+               return false;\r
+       }\r
+       \r
+       public Object getElement() {\r
+               return element;\r
+       }\r
+       \r
+       public int getColumn() {\r
+               return column;\r
+       }\r
+       \r
+       @Override\r
+       public int hashCode() {\r
+               return element.hashCode() + column;\r
+               \r
+       }\r
+       \r
+       @Override\r
+       public boolean equals(Object obj) {\r
+               if (obj == null)\r
+                       return false;\r
+               if (obj.getClass() != getClass())\r
+                       return false;\r
+               ViewerCellReference other = (ViewerCellReference)obj;\r
+               if (column != other.column)\r
+                       return false;\r
+               return element.equals(other.element);\r
+       }\r
+}\r