From: Marc Englund <marc.englund@itmill.com>
Date: Thu, 1 Nov 2007 16:27:41 +0000 (+0000)
Subject: Added CachingDemo; a small client-side caching demo.
X-Git-Tag: 6.7.0.beta1~5716
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=6c66e8bd084a8e2011c50b2dac25022f26208edf;p=vaadin-framework.git

Added CachingDemo; a small client-side caching demo.

svn changeset:2662/svn branch:trunk
---

diff --git a/src/com/itmill/toolkit/demo/CachingDemo.java b/src/com/itmill/toolkit/demo/CachingDemo.java
new file mode 100644
index 0000000000..afec85424f
--- /dev/null
+++ b/src/com/itmill/toolkit/demo/CachingDemo.java
@@ -0,0 +1,50 @@
+package com.itmill.toolkit.demo;
+
+import com.itmill.toolkit.terminal.PaintException;
+import com.itmill.toolkit.terminal.PaintTarget;
+import com.itmill.toolkit.ui.Label;
+import com.itmill.toolkit.ui.TabSheet;
+import com.itmill.toolkit.ui.Window;
+
+/**
+ * This example is a (simple) demonstration of client-side caching. The content
+ * in one tab is intentionally made very slow to produce server-side. When the
+ * user changes to this tab for the first time, there will be a 3 second wait
+ * before the content shows up, but the second time it shows up immediately
+ * since the content has not changed and is cached client-side.
+ * 
+ * @author IT Mill Ltd.
+ */
+public class CachingDemo extends com.itmill.toolkit.Application {
+
+	public void init() {
+
+		Window main = new Window("Client-side caching example");
+		setMainWindow(main);
+
+		setTheme("example");
+
+		TabSheet ts = new TabSheet();
+		ts.setCaption("setHeigth(300)");
+		main.addComponent(ts);
+		ts.setHeight(300);
+		Label l = new Label(
+				"A normal label, quick to render. The second tab will be slow to render the first time, after that it will be as quick as this one.");
+		ts.addTab(l, "Normal", null);
+		l = new Label(
+				"The first time you change to this tab, this label is very slow to produce (server-side). However, it will seem fast the second time you change to this tab, because it has not changed and is cached client-side.") {
+			public void paintContent(PaintTarget target) throws PaintException {
+				try {
+					Thread.sleep(3000);
+				} catch (Exception e) {
+					// IGNORED
+				}
+				super.paintContent(target);
+			}
+
+		};
+		ts.addTab(l, "Slow", null);
+
+	}
+
+}