From: Matti Tahvonen <matti.tahvonen@itmill.com>
Date: Thu, 2 Aug 2007 05:38:03 +0000 (+0000)
Subject: added scroll position indicator when scrolling to area with unrendered rows
X-Git-Tag: 6.7.0.beta1~6147
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=e3b1c83bbe4e337b53eb2b0a8e7015c096811169;p=vaadin-framework.git

added scroll position indicator when scrolling to area with unrendered rows

svn changeset:1931/svn branch:trunk
---

diff --git a/src/com/itmill/toolkit/terminal/gwt/client/ui/IScrollTable.java b/src/com/itmill/toolkit/terminal/gwt/client/ui/IScrollTable.java
index 7a55fc9972..a28255cc66 100644
--- a/src/com/itmill/toolkit/terminal/gwt/client/ui/IScrollTable.java
+++ b/src/com/itmill/toolkit/terminal/gwt/client/ui/IScrollTable.java
@@ -87,6 +87,7 @@ public class IScrollTable extends Composite implements Paintable, ITable, Scroll
 	private HashMap actionMap = new HashMap();
 	private String[] visibleColOrder;
 	private boolean initialContentReceived = false;
+	private Element scrollPositionElement;
 	
 	public IScrollTable() {
 		// TODO move headerContainer and column selector into TableHead
@@ -181,6 +182,7 @@ public class IScrollTable extends Composite implements Paintable, ITable, Scroll
 				sizeInit();
 			}
 		}
+		hideScrollPositionAnnotation();
 	}
 	
 	private void updateVisibleColumns(UIDL uidl) {
@@ -474,6 +476,14 @@ public class IScrollTable extends Composite implements Paintable, ITable, Scroll
 			preLimit = 0;
 		int lastRendered = tBody.getLastRendered();
 		int firstRendered = tBody.getFirstRendered();
+		
+		// tell scroll position to user if currently "visible"  rows are not rendered
+		if( (lastRendered < firstRowInViewPort + pageLength) ||
+				(firstRowInViewPort <  firstRendered)) {
+			announceScrollPosition();
+		}
+		
+		
 		if( postLimit <= lastRendered && preLimit >= firstRendered ) {
 			client.updateVariable(this.paintableId, "firstvisible", firstRowInViewPort, false);
 			return; // scrolled withing "non-react area"
@@ -507,6 +517,35 @@ public class IScrollTable extends Composite implements Paintable, ITable, Scroll
 		
 	}
 
+	private void announceScrollPosition() {
+		client.console.log(""+firstRowInViewPort);
+		if(scrollPositionElement == null) {
+			scrollPositionElement = DOM.createDiv();
+			DOM.setAttribute(scrollPositionElement, "className", "i-table-scrollposition");
+			DOM.appendChild(getElement(), scrollPositionElement);
+		}
+		DOM.setStyleAttribute(scrollPositionElement, "left",
+				(
+						DOM.getAbsoluteLeft(getElement()) + 
+						DOM.getIntAttribute(getElement(), "offsetWidth")/2 
+						- 75
+				)  + "px");
+		DOM.setStyleAttribute(scrollPositionElement, "top",
+				(
+						DOM.getAbsoluteTop(getElement()) + 
+						DOM.getIntAttribute(getElement(), "offsetHeight")/2 
+						- 20
+				)  + "px");
+		DOM.setInnerHTML(scrollPositionElement, 
+				firstRowInViewPort + " - " + (firstRowInViewPort + pageLength) + "...");
+		DOM.setStyleAttribute(scrollPositionElement, "display", "block");
+	}
+	
+	private void hideScrollPositionAnnotation() {
+		if(scrollPositionElement != null)
+			DOM.setStyleAttribute(scrollPositionElement, "display", "none");
+	}
+
 	private class RowRequestHandler extends Timer {
 		
 		private int reqFirstRow = 0;
diff --git a/src/com/itmill/toolkit/terminal/gwt/public/component-themes/table/css/table.css b/src/com/itmill/toolkit/terminal/gwt/public/component-themes/table/css/table.css
index 18e547b1e2..3f98208424 100644
--- a/src/com/itmill/toolkit/terminal/gwt/public/component-themes/table/css/table.css
+++ b/src/com/itmill/toolkit/terminal/gwt/public/component-themes/table/css/table.css
@@ -144,9 +144,15 @@
 	opacity: 0.5;
 	filter: alpha(opacity=50);
 }
-
-
-
+
+.i-table-scrollposition {
+	display: none;
+	position: absolute;
+	width: 150px;
+	padding: 4px;
+	border: 1px solid black;
+	background: yellow;
+}
 
 /* IE specific styles */
 * html .i-table-header-wrap {