From 7218ba4e48d6b58dd031397486aa9e2f6b72099c Mon Sep 17 00:00:00 2001
From: Bruno Sinou <bsinou@argeo.org>
Date: Fri, 25 Oct 2013 12:24:11 +0000
Subject: [PATCH] Centralize static methods that are widely used in JCR based
 UI https://www.argeo.org/bugzilla/show_bug.cgi?id=186

git-svn-id: https://svn.argeo.org/commons/branches/1.x@6571 4cfe0d0a-d680-48aa-b62c-e0a02a3f76cc
---
 .../org/argeo/eclipse/ui/jcr/JcrUiUtils.java  | 146 ++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 base/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/JcrUiUtils.java

diff --git a/base/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/JcrUiUtils.java b/base/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/JcrUiUtils.java
new file mode 100644
index 000000000..8ee13aab0
--- /dev/null
+++ b/base/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/JcrUiUtils.java
@@ -0,0 +1,146 @@
+package org.argeo.eclipse.ui.jcr;
+
+import java.util.Calendar;
+
+import javax.jcr.Node;
+import javax.jcr.PropertyType;
+import javax.jcr.RepositoryException;
+
+import org.argeo.ArgeoException;
+import org.argeo.eclipse.ui.jcr.lists.NodeViewerComparator;
+import org.argeo.eclipse.ui.jcr.lists.RowViewerComparator;
+import org.eclipse.jface.viewers.TableViewer;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.widgets.Table;
+
+/** Utility methods to simplify UI development using eclipse and JCR. */
+public class JcrUiUtils {
+
+	/**
+	 * Centralizes management of updating property value. Among other to avoid
+	 * infinite loop when the new value is the same as the ones that is already
+	 * stored in JCR.
+	 * 
+	 * @return true if the value as changed
+	 */
+	public static boolean setJcrProperty(Node node, String propName,
+			int propertyType, Object value) {
+		try {
+			// int propertyType = getPic().getProperty(propName).getType();
+			switch (propertyType) {
+			case PropertyType.STRING:
+				if ("".equals((String) value)
+						&& (!node.hasProperty(propName) || node
+								.hasProperty(propName)
+								&& "".equals(node.getProperty(propName)
+										.getString())))
+					// workaround the fact that the Text widget value cannot be
+					// set to null
+					return false;
+				else if (node.hasProperty(propName)
+						&& node.getProperty(propName).getString()
+								.equals((String) value))
+					// nothing changed yet
+					return false;
+				else {
+					node.setProperty(propName, (String) value);
+					return true;
+				}
+			case PropertyType.BOOLEAN:
+				if (node.hasProperty(propName)
+						&& node.getProperty(propName).getBoolean() == (Boolean) value)
+					// nothing changed yet
+					return false;
+				else {
+					node.setProperty(propName, (Boolean) value);
+					return true;
+				}
+			case PropertyType.DATE:
+				if (node.hasProperty(propName)
+						&& node.getProperty(propName).getDate()
+								.equals((Calendar) value))
+					// nothing changed yet
+					return false;
+				else {
+					node.setProperty(propName, (Calendar) value);
+					return true;
+				}
+			case PropertyType.LONG:
+				Long lgValue = (Long) value;
+
+				if (lgValue == null)
+					lgValue = 0L;
+
+				if (node.hasProperty(propName)
+						&& node.getProperty(propName).getLong() == lgValue)
+					// nothing changed yet
+					return false;
+				else {
+					node.setProperty(propName, lgValue);
+					return true;
+				}
+
+			default:
+				throw new ArgeoException("Unimplemented property save");
+			}
+		} catch (RepositoryException re) {
+			throw new ArgeoException("Unexpected error while setting property",
+					re);
+		}
+	}
+
+	/**
+	 * Creates a new selection adapter in order to provide sorting abitily on a
+	 * swt table that display a row list
+	 **/
+	public static SelectionAdapter getRowSelectionAdapter(final int index,
+			final int propertyType, final String selectorName,
+			final String propertyName, final RowViewerComparator comparator,
+			final TableViewer viewer) {
+		SelectionAdapter selectionAdapter = new SelectionAdapter() {
+			@Override
+			public void widgetSelected(SelectionEvent e) {
+				Table table = viewer.getTable();
+				comparator.setColumn(propertyType, selectorName, propertyName);
+				int dir = table.getSortDirection();
+				if (table.getSortColumn() == table.getColumn(index)) {
+					dir = dir == SWT.UP ? SWT.DOWN : SWT.UP;
+				} else {
+					dir = SWT.DOWN;
+				}
+				table.setSortDirection(dir);
+				table.setSortColumn(table.getColumn(index));
+				viewer.refresh();
+			}
+		};
+		return selectionAdapter;
+	}
+
+	/**
+	 * Creates a new selection adapter in order to provide sorting abitily on a
+	 * swt table that display a row list
+	 **/
+	public static SelectionAdapter getNodeSelectionAdapter(final int index,
+			final int propertyType, final String propertyName,
+			final NodeViewerComparator comparator, final TableViewer viewer) {
+		SelectionAdapter selectionAdapter = new SelectionAdapter() {
+			@Override
+			public void widgetSelected(SelectionEvent e) {
+				Table table = viewer.getTable();
+				comparator.setColumn(propertyType, propertyName);
+				int dir = table.getSortDirection();
+				if (table.getSortColumn() == table.getColumn(index)) {
+					dir = dir == SWT.UP ? SWT.DOWN : SWT.UP;
+				} else {
+					dir = SWT.DOWN;
+				}
+				table.setSortDirection(dir);
+				table.setSortColumn(table.getColumn(index));
+				viewer.refresh();
+			}
+		};
+		return selectionAdapter;
+	}
+}
-- 
2.30.2