From cbcf59df3b8faddf9e2e967b43ece2f0f0987ab2 Mon Sep 17 00:00:00 2001
From: Marc Englund <marc.englund@itmill.com>
Date: Fri, 2 Nov 2007 14:13:07 +0000
Subject: [PATCH] Null selection changes (#574)

svn changeset:2694/svn branch:trunk
---
 src/com/itmill/toolkit/ui/AbstractSelect.java | 25 ++++++++++++++++---
 src/com/itmill/toolkit/ui/Table.java          | 16 +++++++++++-
 src/com/itmill/toolkit/ui/Tree.java           |  8 ++++++
 3 files changed, 45 insertions(+), 4 deletions(-)

diff --git a/src/com/itmill/toolkit/ui/AbstractSelect.java b/src/com/itmill/toolkit/ui/AbstractSelect.java
index 939cdd248d..aa928548d7 100644
--- a/src/com/itmill/toolkit/ui/AbstractSelect.java
+++ b/src/com/itmill/toolkit/ui/AbstractSelect.java
@@ -407,7 +407,11 @@ public abstract class AbstractSelect extends AbstractField implements
 				LinkedList s = new LinkedList();
 				for (int i = 0; i < ka.length; i++) {
 					Object id = this.itemIdMapper.get(ka[i]);
-					if (id != null && containsId(id)) {
+					if (!isNullSelectionAllowed()
+							&& (id == null || id == getNullSelectionItemId())) {
+						// skip empty selection if nullselection is not allowed
+						requestRepaint();
+					} else if (id != null && containsId(id)) {
 						s.add(id);
 					} else if (this.itemIdMapper.isNewIdKey(ka[i])
 							&& newitem != null && newitem.length() > 0) {
@@ -415,6 +419,12 @@ public abstract class AbstractSelect extends AbstractField implements
 					}
 				}
 
+				if (!isNullSelectionAllowed() && s.size() < 1) {
+					// empty selection not allowed, keep old value
+					requestRepaint();
+					return;
+				}
+
 				// Limits the deselection to the set of visible items
 				// (non-visible items can not be deselected)
 				Collection visible = getVisibleItemIds();
@@ -431,8 +441,14 @@ public abstract class AbstractSelect extends AbstractField implements
 				}
 			} else {
 				// Single select mode
+				if (!isNullSelectionAllowed()
+						&& (ka.length == 0 || ka[0] == null || ka[0] == getNullSelectionItemId())) {
+					requestRepaint();
+					return;
+				}
 				if (ka.length == 0) {
-					// Allows deselection only if the deselected item is visible
+					// Allows deselection only if the deselected item is
+					// visible
 					Object current = getValue();
 					Collection visible = getVisibleItemIds();
 					if (visible != null && visible.contains(current)) {
@@ -440,7 +456,10 @@ public abstract class AbstractSelect extends AbstractField implements
 					}
 				} else {
 					Object id = this.itemIdMapper.get(ka[0]);
-					if (id != null && id.equals(getNullSelectionItemId())) {
+					if (!isNullSelectionAllowed() && id == null) {
+						requestRepaint();
+					} else if (id != null
+							&& id.equals(getNullSelectionItemId())) {
 						setValue(null, true);
 					} else if (this.itemIdMapper.isNewIdKey(ka[0])) {
 						setValue(newitem);
diff --git a/src/com/itmill/toolkit/ui/Table.java b/src/com/itmill/toolkit/ui/Table.java
index 6d5a699116..5a9762db9e 100644
--- a/src/com/itmill/toolkit/ui/Table.java
+++ b/src/com/itmill/toolkit/ui/Table.java
@@ -1322,6 +1322,13 @@ public class Table extends AbstractSelect implements Action.Container,
 	 */
 	public void changeVariables(Object source, Map variables) {
 
+		if (!isSelectable() && variables.containsKey("selected")) {
+			// Not-selectable is a special case, AbstractSelect does not support
+			// TODO could be optimized.
+			variables = new HashMap(variables);
+			variables.remove("selected");
+		}
+
 		super.changeVariables(source, variables);
 
 		// Page start index
@@ -1522,9 +1529,16 @@ public class Table extends AbstractSelect implements Action.Container,
 		}
 		target.startTag("rows");
 		for (int i = 0; i < cells[0].length; i++) {
-			target.startTag("tr");
 			Object itemId = cells[CELL_ITEMID][i];
 
+			if (!isNullSelectionAllowed() && getNullSelectionItemId() != null
+					&& itemId == getNullSelectionItemId()) {
+				// Remove null selection item if null selection is not allowed
+				continue;
+			}
+
+			target.startTag("tr");
+
 			// tr attributes
 			if (rowheads) {
 				if (cells[CELL_ICON][i] != null) {
diff --git a/src/com/itmill/toolkit/ui/Tree.java b/src/com/itmill/toolkit/ui/Tree.java
index 0aaa22a3c7..3c5552c256 100644
--- a/src/com/itmill/toolkit/ui/Tree.java
+++ b/src/com/itmill/toolkit/ui/Tree.java
@@ -31,6 +31,7 @@ package com.itmill.toolkit.ui;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.LinkedHashSet;
@@ -336,6 +337,13 @@ public class Tree extends AbstractSelect implements Container.Hierarchical,
 	 */
 	public void changeVariables(Object source, Map variables) {
 
+		if (!isSelectable() && variables.containsKey("selected")) {
+			// Not-selectable is a special case, AbstractSelect does not support
+			// TODO could be optimized.
+			variables = new HashMap(variables);
+			variables.remove("selected");
+		}
+
 		// Collapses the nodes
 		if (variables.containsKey("collapse")) {
 			String[] keys = (String[]) variables.get("collapse");
-- 
2.39.5