X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=swt%2Forg.argeo.cms.swt%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2FAbstractTreeContentProvider.java;fp=swt%2Forg.argeo.cms.swt%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2FAbstractTreeContentProvider.java;h=64ea2dbc9a193121ad47d0b60b94d1f2aefb8ecd;hb=7b242851c0094d13cbaca5b68261ad92c873a59f;hp=0000000000000000000000000000000000000000;hpb=dbb84b4ec2d313ec0724d035c32f482ac57974c5;p=lgpl%2Fargeo-commons.git

diff --git a/swt/org.argeo.cms.swt/src/org/argeo/eclipse/ui/AbstractTreeContentProvider.java b/swt/org.argeo.cms.swt/src/org/argeo/eclipse/ui/AbstractTreeContentProvider.java
new file mode 100644
index 000000000..64ea2dbc9
--- /dev/null
+++ b/swt/org.argeo.cms.swt/src/org/argeo/eclipse/ui/AbstractTreeContentProvider.java
@@ -0,0 +1,43 @@
+package org.argeo.eclipse.ui;
+
+import org.argeo.cms.ux.widgets.TreeParent;
+import org.eclipse.jface.viewers.ITreeContentProvider;
+import org.eclipse.jface.viewers.Viewer;
+
+/**
+ * Tree content provider dealing with tree objects and providing reasonable
+ * defaults.
+ */
+public abstract class AbstractTreeContentProvider implements
+		ITreeContentProvider {
+	private static final long serialVersionUID = 8246126401957763868L;
+
+	/** Does nothing */
+	public void dispose() {
+	}
+
+	/** Does nothing */
+	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
+	}
+
+	public Object[] getChildren(Object element) {
+		if (element instanceof TreeParent) {
+			return ((TreeParent) element).getChildren();
+		}
+		return new Object[0];
+	}
+
+	public Object getParent(Object element) {
+		if (element instanceof TreeParent) {
+			return ((TreeParent) element).getParent();
+		}
+		return null;
+	}
+
+	public boolean hasChildren(Object element) {
+		if (element instanceof TreeParent) {
+			return ((TreeParent) element).hasChildren();
+		}
+		return false;
+	}
+}
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