1 files changed, 113 insertions, 0 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/widgets/AbstractValidatingDialog.java b/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/widgets/AbstractValidatingDialog.java
new file mode 100644
index 0000000000..1ff3f874cd
--- /dev/null
+++ b/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/widgets/AbstractValidatingDialog.java
@@ -0,0 +1,113 @@
+/*******************************************************************************
+ * Copyright (c) 2008 Oracle. All rights reserved.
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0, which accompanies this distribution
+ * and is available at http://www.eclipse.org/legal/epl-v10.html.
+ *
+ * Contributors:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.ui.internal.widgets;
+
+import org.eclipse.jpt.utility.internal.node.Node;
+import org.eclipse.jpt.utility.internal.node.Problem;
+import org.eclipse.osgi.util.NLS;
+import org.eclipse.swt.widgets.Shell;
+
+/**
+ * This dialog is similar to it superclass, <code>AbstractDialog</code>, with
+ * the added value of an error message label below the main panel. A subclass
+ * can set this error message as needed so that it can inform the user something
+ * incorrect has been entered.
+ * <p>
+ * If there is an error message, it will be shown. If there is a warning
+ * message, it will only be shown if there is no error message. Warning messages
+ * have a different icon than error messages.
+ *
+ * @version 2.0
+ * @since 2.0
+ */
+public abstract class AbstractValidatingDialog<T extends Node> extends AbstractDialog<T> {
+
+	/**
+	 * Creates a new <code>AbstractValidatingDialog</code>.
+	 *
+	 * @param parent The parent shell
+	 */
+	public AbstractValidatingDialog(Shell parent) {
+		super(parent);
+	}
+
+	/**
+	 * Creates a new <code>AbstractValidatingDialog</code>.
+	 *
+	 * @param parent The parent shell
+	 * @param title The dialog's title
+	 */
+	public AbstractValidatingDialog(Shell parent, String title) {
+		super(parent, title);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 */
+	@Override
+	Node.Validator buildValidator() {
+		return new Node.Validator() {
+			public void pause() {
+			}
+
+			public void resume() {
+			}
+
+			public void validate() {
+				AbstractValidatingDialog.this.validate();
+			}
+		};
+	}
+
+	protected void clearErrorMessage() {
+		setErrorMessage(null);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 */
+	@Override
+	boolean hasTitleArea() {
+		return true;
+	}
+
+	/**
+	 * convenience method for simple error message
+	 */
+	protected void setErrorMessageKey(String key, Object... argument) {
+		setErrorMessage(NLS.bind(key, argument));
+	}
+
+	/**
+	 * Updates the error message, either shows the first error problem or hides
+	 * the error pane. If the progress bar is shown, then the error message will
+	 * not be shown.
+	 */
+	private void updateErrorMessage() {
+		if (subject().hasBranchProblems()) {
+			Problem problem = subject().branchProblems().next();
+			setErrorMessageKey(problem.messageKey(), problem.messageArguments());
+		}
+		// TODO: It would be nice to add warnings to the model
+//		else if (this.subject().hasBranchWarnings()) {
+//			Problem problem = this.subject().branchWarnings().next();
+//			this.setWarningMessageKey(problem.getMessageKey(), problem.getMessageArguments());
+//		}
+		else {
+			clearErrorMessage();
+		}
+	}
+
+	private void validate() {
+		subject().validateBranch();
+		updateErrorMessage();
+		getButton(OK).setEnabled(!subject().hasBranchProblems());
+	}
+}