Fixes scrollToLine while resizing Grid via split position (#18424)

Change-Id: I5ecd8a91bd1ebea809d04a54307fcd752fbe3f39

client/src/com/vaadin/client/widgets/Escalator.java

@@ -6022,10 +6022,14 @@ public class Escalator extends Widget implements RequiresResize,
     public void scrollToRow(final int rowIndex,
             final ScrollDestination destination, final int padding)
             throws IndexOutOfBoundsException, IllegalArgumentException {
-        validateScrollDestination(destination, padding);
-        verifyValidRowIndex(rowIndex);
-
-        scroller.scrollToRow(rowIndex, destination, padding);
+        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
+            @Override
+            public void execute() {
+                validateScrollDestination(destination, padding);
+                verifyValidRowIndex(rowIndex);
+                scroller.scrollToRow(rowIndex, destination, padding);
+            }
+        });
     }
 
     private void verifyValidRowIndex(final int rowIndex) {
@@ -6086,55 +6090,62 @@ public class Escalator extends Widget implements RequiresResize,
      *             {@code destination == null}; or if {@code rowIndex == -1} and
      *             there is no spacer open at that index.
      */
-    public void scrollToRowAndSpacer(int rowIndex,
-            ScrollDestination destination, int padding)
+    public void scrollToRowAndSpacer(final int rowIndex,
+            final ScrollDestination destination, final int padding)
             throws IllegalArgumentException {
-        validateScrollDestination(destination, padding);
-        if (rowIndex != -1) {
-            verifyValidRowIndex(rowIndex);
-        }
+        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
+            @Override
+            public void execute() {
+                validateScrollDestination(destination, padding);
+                if (rowIndex != -1) {
+                    verifyValidRowIndex(rowIndex);
+                }
 
-        // row range
-        final Range rowRange;
-        if (rowIndex != -1) {
-            int rowTop = (int) Math.floor(body.getRowTop(rowIndex));
-            int rowHeight = (int) Math.ceil(body.getDefaultRowHeight());
-            rowRange = Range.withLength(rowTop, rowHeight);
-        } else {
-            rowRange = Range.withLength(0, 0);
-        }
+                // row range
+                final Range rowRange;
+                if (rowIndex != -1) {
+                    int rowTop = (int) Math.floor(body.getRowTop(rowIndex));
+                    int rowHeight = (int) Math.ceil(body.getDefaultRowHeight());
+                    rowRange = Range.withLength(rowTop, rowHeight);
+                } else {
+                    rowRange = Range.withLength(0, 0);
+                }
 
-        // get spacer
-        final SpacerContainer.SpacerImpl spacer = body.spacerContainer
-                .getSpacer(rowIndex);
+                // get spacer
+                final SpacerContainer.SpacerImpl spacer = body.spacerContainer
+                        .getSpacer(rowIndex);
 
-        if (rowIndex == -1 && spacer == null) {
-            throw new IllegalArgumentException("Cannot scroll to row index "
-                    + "-1, as there is no spacer open at that index.");
-        }
+                if (rowIndex == -1 && spacer == null) {
+                    throw new IllegalArgumentException(
+                            "Cannot scroll to row index "
+                                    + "-1, as there is no spacer open at that index.");
+                }
 
-        // make into target range
-        final Range targetRange;
-        if (spacer != null) {
-            final int spacerTop = (int) Math.floor(spacer.getTop());
-            final int spacerHeight = (int) Math.ceil(spacer.getHeight());
-            Range spacerRange = Range.withLength(spacerTop, spacerHeight);
+                // make into target range
+                final Range targetRange;
+                if (spacer != null) {
+                    final int spacerTop = (int) Math.floor(spacer.getTop());
+                    final int spacerHeight = (int) Math.ceil(spacer.getHeight());
+                    Range spacerRange = Range.withLength(spacerTop,
+                            spacerHeight);
 
-            targetRange = rowRange.combineWith(spacerRange);
-        } else {
-            targetRange = rowRange;
-        }
+                    targetRange = rowRange.combineWith(spacerRange);
+                } else {
+                    targetRange = rowRange;
+                }
 
-        // get params
-        int targetStart = targetRange.getStart();
-        int targetEnd = targetRange.getEnd();
-        double viewportStart = getScrollTop();
-        double viewportEnd = viewportStart + body.getHeightOfSection();
+                // get params
+                int targetStart = targetRange.getStart();
+                int targetEnd = targetRange.getEnd();
+                double viewportStart = getScrollTop();
+                double viewportEnd = viewportStart + body.getHeightOfSection();
 
-        double scrollPos = getScrollPos(destination, targetStart, targetEnd,
-                viewportStart, viewportEnd, padding);
+                double scrollPos = getScrollPos(destination, targetStart,
+                        targetEnd, viewportStart, viewportEnd, padding);
 
-        setScrollTop(scrollPos);
+                setScrollTop(scrollPos);
+            }
+        });
     }
 
     private static void validateScrollDestination(

uitest/src/com/vaadin/tests/components/grid/GridScrollToLineWhileResizing.java

@@ -0,0 +1,73 @@
+/*
+ * 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.tests.components.grid;
+
+import com.vaadin.data.Item;
+import com.vaadin.data.util.IndexedContainer;
+import com.vaadin.event.SelectionEvent;
+import com.vaadin.event.SelectionEvent.SelectionListener;
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.ui.Grid;
+import com.vaadin.ui.Grid.SelectionMode;
+import com.vaadin.ui.VerticalSplitPanel;
+
+public class GridScrollToLineWhileResizing extends AbstractTestUI {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+
+        final VerticalSplitPanel vsp = new VerticalSplitPanel();
+        vsp.setWidth(500, Unit.PIXELS);
+        vsp.setHeight(500, Unit.PIXELS);
+        vsp.setSplitPosition(100, Unit.PERCENTAGE);
+        addComponent(vsp);
+
+        IndexedContainer indexedContainer = new IndexedContainer();
+        indexedContainer.addContainerProperty("column1", String.class, "");
+
+        for (int i = 0; i < 100; i++) {
+            Item addItem = indexedContainer.addItem(i);
+            addItem.getItemProperty("column1").setValue("cell" + i);
+        }
+
+        final Grid grid = new Grid(indexedContainer);
+        grid.setSizeFull();
+
+        grid.setSelectionMode(SelectionMode.SINGLE);
+        grid.addSelectionListener(new SelectionListener() {
+
+            @Override
+            public void select(SelectionEvent event) {
+                vsp.setSplitPosition(50, Unit.PERCENTAGE);
+                grid.scrollTo(event.getSelected().iterator().next());
+            }
+        });
+
+        vsp.setFirstComponent(grid);
+    }
+
+    @Override
+    protected String getTestDescription() {
+        return "Tests scrollToLine while moving SplitPanel split position to resize the Grid on the same round-trip.";
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return null;
+    }
+
+}

uitest/src/com/vaadin/tests/components/grid/GridScrollToLineWhileResizingTest.java

@@ -0,0 +1,49 @@
+/*
+ * 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.tests.components.grid;
+
+import static org.junit.Assert.assertTrue;
+
+import java.util.List;
+
+import org.junit.Test;
+import org.openqa.selenium.By;
+import org.openqa.selenium.WebElement;
+
+import com.vaadin.testbench.elements.GridElement;
+import com.vaadin.testbench.parallel.TestCategory;
+import com.vaadin.tests.tb3.MultiBrowserTest;
+
+@TestCategory("grid")
+public class GridScrollToLineWhileResizingTest extends MultiBrowserTest {
+
+    @Test
+    public void testScrollToLineWorksWhileMovingSplitProgrammatically() {
+        openTestURL();
+
+        $(GridElement.class).first().getCell(21, 0).click();
+
+        List<WebElement> cells = findElements(By.className("v-grid-cell"));
+        boolean foundCell21 = false;
+        for (WebElement cell : cells) {
+            if ("cell21".equals(cell.getText())) {
+                foundCell21 = true;
+            }
+        }
+
+        assertTrue(foundCell21);
+    }
+}