Eclipse plugin samples

I'm pretty new to the Eclipse IDE and I need to develop a paint plugin. I read that there is one in the plugin sdk, but it's not clear to me how to create a project which uses that.

I installed the plugin sdk as described here: http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse.platform.doc.isv/samples/org.eclipse.swt.examples/doc-html/swt_manual_setup.html

downloaded the plugin .zip sdk here: http://download.eclipse.org/eclipse/downloads/drops/R-3.6.2-201102101200/index.php#ExamplePlugins under "Example plug-ins"

and tried to create a new project from the existing jar file org.eclipse.swt.examples.paint.source_3.1.100.v3659b.jar

Since jars are actually zip files, I could import two source files: PaintPlugin.java and PaintView.java

But they are not complete! The example is far more elaborated than the few lines described in these two files, just to make it clear: running the SWT plugin "paint" allows开发者_如何学Go me to draw rectangles, circles, rounded-corners rectangles, change colors, etc... the lines in the abovementioned files instead allows me nothing!! The view won't even show

What am I missing? Can someone help making this clear or pointing me towards a simple/explanatory guide?

Did you install that jar correctly? (as by copying it to the dropins folder etc)

If nothing works out, check out the plugins directly from CVS. They are available here: http://dev.eclipse.org/viewcvs/viewvc.cgi/org.eclipse.swt.examples/

[Update] Eclipse moved to Git from CVS. Find the samples in Git: http://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.examples