My first .Net app : C# Analog Clock

Finally, my first try on a simple .NET app is done. I created a analog clock widget using C#. I think it's quite challenging for a beginner because it will require simple background of Math, image processing, and 3D graphics programming.

With the mouse hit-test, anti-aliasing graphics and flicker-free double buffering, you couldn't even tell the difference between it and Sidebar gadget. Yet it is in C#, and it reduces the pain to deal with Win32 API directly.

To draw the hour-hand, minute-hand and second-hand needs a little trick.

1) Set the origin of form to center, from left-top (so that following rotation can be taken place)
2) Save the current state

3) Rotate the new graphics objects

4) Draw the second-hand (or any hands) at new origin, new orientation

5) Restore the saved state

6) Rotate the new graphics objects
7) Draw the minute-hand (or any hands left) at new origin, new orientation

8) Reload the identity / Reset the origin and orientation (Restore the saved state seems failed)
9) Rotate the new graphics objects

10) Draw the hour-hand (or any hands left) at new origin, new orientation

Voila!

You can get the source here or get the exe here!

#p/s: thanks for the Fasticon for its free icon provided.