From 5c52721648f617bc26f6353255abb351dbc591e5 Mon Sep 17 00:00:00 2001
From: John Alhroos <john.ahlroos@itmill.com>
Date: Fri, 19 Aug 2011 11:29:53 +0000
Subject: [PATCH] Fixes pageLength=0 in TreeTable #7292

svn changeset:20506/svn branch:6.7
---
 .../terminal/gwt/client/ui/VScrollTable.java  | 20 +++++++++++------
 .../terminal/gwt/client/ui/VTreeTable.java    | 22 ++++++++++++-------
 2 files changed, 27 insertions(+), 15 deletions(-)

diff --git a/src/com/vaadin/terminal/gwt/client/ui/VScrollTable.java b/src/com/vaadin/terminal/gwt/client/ui/VScrollTable.java
index f0db3e55b2..a96ad3cb4e 100644
--- a/src/com/vaadin/terminal/gwt/client/ui/VScrollTable.java
+++ b/src/com/vaadin/terminal/gwt/client/ui/VScrollTable.java
@@ -884,7 +884,7 @@ public class VScrollTable extends FlowPanel implements Table, ScrollHandler,
                     updateBody(rowData, uidl.getIntAttribute("firstrow"),
                             uidl.getIntAttribute("rows"));
                     if (headerChangedDuringUpdate) {
-                        lazyAdjustColumnWidths.schedule(1);
+                        triggerLazyColumnAdjustment(true);
                     } else {
                         // webkits may still bug with their disturbing scrollbar
                         // bug, see #3457
@@ -1075,7 +1075,7 @@ public class VScrollTable extends FlowPanel implements Table, ScrollHandler,
         }
     }
 
-    private void updatePageLength(UIDL uidl) {
+    protected void updatePageLength(UIDL uidl) {
         int oldPageLength = pageLength;
         if (uidl.hasAttribute("pagelength")) {
             pageLength = uidl.getIntAttribute("pagelength");
@@ -3030,7 +3030,7 @@ public class VScrollTable extends FlowPanel implements Table, ScrollHandler,
                 } else {
                     tHead.removeCell(colKey);
                     collapsedColumns.add(colKey);
-                    lazyAdjustColumnWidths.schedule(1);
+                    triggerLazyColumnAdjustment(true);
                 }
 
                 // update variable to server
@@ -5488,8 +5488,7 @@ public class VScrollTable extends FlowPanel implements Table, ScrollHandler,
             setContentWidth(innerPixels);
 
             // readjust undefined width columns
-            lazyAdjustColumnWidths.cancel();
-            lazyAdjustColumnWidths.schedule(LAZY_COLUMN_ADJUST_TIMEOUT);
+            triggerLazyColumnAdjustment(false);
 
         } else {
             // Undefined width
@@ -5499,8 +5498,7 @@ public class VScrollTable extends FlowPanel implements Table, ScrollHandler,
             sizeInit();
 
             // readjust undefined width columns
-            lazyAdjustColumnWidths.cancel();
-            lazyAdjustColumnWidths.schedule(LAZY_COLUMN_ADJUST_TIMEOUT);
+            triggerLazyColumnAdjustment(false);
         }
 
         /*
@@ -6607,4 +6605,12 @@ public class VScrollTable extends FlowPanel implements Table, ScrollHandler,
             return function(){ return false; };
     }-*/;
 
+    protected void triggerLazyColumnAdjustment(boolean now) {
+        lazyAdjustColumnWidths.cancel();
+        if (now) {
+            lazyAdjustColumnWidths.run();
+        } else {
+            lazyAdjustColumnWidths.schedule(LAZY_COLUMN_ADJUST_TIMEOUT);
+        }
+    }
 }
diff --git a/src/com/vaadin/terminal/gwt/client/ui/VTreeTable.java b/src/com/vaadin/terminal/gwt/client/ui/VTreeTable.java
index b21a5dfdce..aa2ebed23d 100644
--- a/src/com/vaadin/terminal/gwt/client/ui/VTreeTable.java
+++ b/src/com/vaadin/terminal/gwt/client/ui/VTreeTable.java
@@ -26,7 +26,6 @@ import com.vaadin.terminal.gwt.client.BrowserInfo;
 import com.vaadin.terminal.gwt.client.ComputedStyle;
 import com.vaadin.terminal.gwt.client.RenderSpace;
 import com.vaadin.terminal.gwt.client.UIDL;
-import com.vaadin.terminal.gwt.client.VConsole;
 import com.vaadin.terminal.gwt.client.ui.VScrollTable.VScrollTableBody.VScrollTableRow;
 import com.vaadin.terminal.gwt.client.ui.VTreeTable.VTreeTableScrollBody.VTreeTableRow;
 
@@ -64,10 +63,21 @@ public class VTreeTable extends VScrollTable {
 
             int scrollPosition2 = widget.getScrollPosition();
             if (scrollPosition != scrollPosition2) {
-                VConsole.log("TT scrollpos from " + scrollPosition + " to "
-                        + scrollPosition2);
                 widget.setScrollPosition(scrollPosition);
             }
+
+            /*
+             * Triggers row calculations, removes cached rows etc. Basically
+             * cleans up state. Be careful if touching this, you will brake
+             * pageLength=0 if you remove this.
+             */
+            onScroll(null);
+
+            /*
+             * Ensure that possibly removed/added scrollbars are considered.
+             */
+            triggerLazyColumnAdjustment(true);
+
             collapseRequest = false;
         }
         if (uidl.hasAttribute("focusedRow")) {
@@ -765,10 +775,6 @@ public class VTreeTable extends VScrollTable {
         // Make sure that initializedAndAttached & al are not reset when the
         // totalrows are updated on expand/collapse requests.
         int newTotalRows = uidl.getIntAttribute("totalrows");
-        if (collapseRequest) {
-            setTotalRows(newTotalRows);
-        } else {
-            super.setTotalRows(newTotalRows);
-        }
+        setTotalRows(newTotalRows);        
     }
 }
-- 
2.39.5