--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.ui.viewsupport;
+
+import org.eclipse.core.resources.IResource;
+
+/**
+ * Can be added to a ProblemMarkerManager to get notified about problem marker
+ * changes. Used to update error ticks.
+ */
+public interface IProblemChangedListener {
+
+ /**
+ * Called when problems changed. This call is posted in an aynch exec,
+ * therefore passed resources must not exist.
+ *
+ * @param changedElements
+ * A set with elements of type <code>IResource</code> that
+ * describe the resources that had an problem change.
+ * @param isMarkerChange
+ * If set to <code>true</code>, the change was a marker
+ * change, if <code>false</code>, the change came from an
+ * annotation model modification.
+ */
+ void problemsChanged(IResource[] changedResources, boolean isMarkerChange);
+
+}