From 3deceaa2c18bdf4978edb7978ba95c7c979863bf Mon Sep 17 00:00:00 2001
From: Teppo Kurki <teppo.kurki@vaadin.com>
Date: Thu, 4 Jun 2015 23:06:01 +0300
Subject: [PATCH] Forget GridLayout column expand ratios when removing columns
 (#18068)

Change-Id: I49e3e54a3e408a2c82ff5d2a0d51c037f60397c5
---
 server/src/com/vaadin/ui/GridLayout.java      |  9 +-
 .../vaadin/ui/GridLayoutExpandRatioTest.java  | 82 +++++++++++++++++++
 2 files changed, 90 insertions(+), 1 deletion(-)
 create mode 100644 server/tests/src/com/vaadin/ui/GridLayoutExpandRatioTest.java

diff --git a/server/src/com/vaadin/ui/GridLayout.java b/server/src/com/vaadin/ui/GridLayout.java
index 35110b39ab..e510fa09fb 100644
--- a/server/src/com/vaadin/ui/GridLayout.java
+++ b/server/src/com/vaadin/ui/GridLayout.java
@@ -782,7 +782,14 @@ public class GridLayout extends AbstractLayout implements
                 }
             }
         }
-        // TODO forget expands for removed columns
+
+        // Forget expands for removed columns
+        if (columns < getColumns()) {
+            for (int i = columns - 1; i < getColumns(); i++) {
+                columnExpandRatio.remove(i);
+                getState().explicitColRatios.remove(i);
+            }
+        }
 
         getState().columns = columns;
     }
diff --git a/server/tests/src/com/vaadin/ui/GridLayoutExpandRatioTest.java b/server/tests/src/com/vaadin/ui/GridLayoutExpandRatioTest.java
new file mode 100644
index 0000000000..685befaab4
--- /dev/null
+++ b/server/tests/src/com/vaadin/ui/GridLayoutExpandRatioTest.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2000-2014 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.ui;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+import com.vaadin.server.Sizeable.Unit;
+
+public class GridLayoutExpandRatioTest {
+
+    private GridLayout gridLayout;
+
+    @Test
+    public void testColExpandRatioIsForgotten() {
+        gridLayout = new GridLayout(4, 1);
+        gridLayout.setWidth(100, Unit.PERCENTAGE);
+        gridLayout.setSpacing(true);
+
+        addComponents(true);
+
+        gridLayout.setColumnExpandRatio(1, 1);
+        gridLayout.setColumnExpandRatio(3, 1);
+
+        assertTrue(gridLayout.getColumnExpandRatio(0) == 0);
+        assertTrue(gridLayout.getColumnExpandRatio(1) == 1);
+        assertTrue(gridLayout.getColumnExpandRatio(2) == 0);
+        assertTrue(gridLayout.getColumnExpandRatio(3) == 1);
+        assertFalse(gridLayout.getState().explicitColRatios.contains(0));
+        assertTrue(gridLayout.getState().explicitColRatios.contains(1));
+        assertFalse(gridLayout.getState().explicitColRatios.contains(2));
+        assertTrue(gridLayout.getState().explicitColRatios.contains(3));
+
+        remove();
+
+        assertTrue(gridLayout.getColumnExpandRatio(0) == 0);
+        assertTrue(gridLayout.getColumnExpandRatio(1) == 1);
+        assertTrue(gridLayout.getColumnExpandRatio(2) == 0);
+        assertTrue(gridLayout.getColumnExpandRatio(3) == 0);
+        assertFalse(gridLayout.getState().explicitColRatios.contains(0));
+        assertTrue(gridLayout.getState().explicitColRatios.contains(1));
+        assertFalse(gridLayout.getState().explicitColRatios.contains(2));
+        assertFalse(gridLayout.getState().explicitColRatios.contains(3));
+
+    }
+
+    private void remove() {
+        gridLayout.removeAllComponents();
+        gridLayout.setColumns(3);
+        addComponents(false);
+    }
+
+    private void addComponents(boolean includeLastOne) {
+        gridLayout.addComponent(label("{1}"));
+        gridLayout.addComponent(label("{2}"));
+        gridLayout.addComponent(label("{3}"));
+        if (includeLastOne) {
+            gridLayout.addComponent(label("{4}"));
+        }
+    }
+
+    private Label label(String content) {
+        Label label = new Label(content);
+        label.setSizeUndefined();
+        return label;
+    }
+}
-- 
2.39.5