dynamic - Clickable clock making sound

I have a moving clock

Dynamic[Refresh[ClockGauge[], UpdateInterval -> 1]]

which should be clickable.

Program should make a sound when hand of a clock will touch the point where I clicked before.

I found something like this:

EventHandler[
Framed@"Play", {"MouseClicked" :> 
EmitSound[Sound@SoundNote["C", 10*^10, "Flute"]],
"MouseExited" :> EmitSound[Sound@SoundNote[SoundVolume -> 0]]}]

to make a sound on click.

But I don't know how to get the position of clicked point.

Answer

Here is a quick first draft:

DynamicModule[{s = 0, pt = {0, 1}}, 

 Column@{ClickPane[
    Dynamic[Show[Refresh[Graphics[ClockGauge[]], UpdateInterval -> 1],
       Graphics[{Red, Point[pt]}]]], 
      (pt = #; s = 30*(1 + ArcTan[-pt[[2]], -pt[[1]]]/Pi)) &], 
   DynamicWrapper[Dynamic@s, 
    If[DateValue["Second"] == Round[s], 
     EmitSound[Sound@SoundNote["C", 0.5, "Flute"]]], 
    UpdateInterval -> 1]}]

I'll leave the further refinement to you.

In response to a comment.
Using the value of Clock:

DynamicModule[{pt = {0, 1}, secondHand = Line[{{0, 0}, {0, 55}}], clock = 0}, 
 Column@{ClickPane[
    Dynamic[Show[Graphics[Circle[{0, 0}, 60]], 
      Graphics[
       Dynamic[{Rotate[secondHand, (clock = Clock[{0, 59, 1}])*-Pi/30, {0, 0}]}]], 
      Graphics[{Red, Point[pt]}]]], 
    (pt = #; s = 30*(1 + ArcTan[-pt[[2]], -pt[[1]]]/Pi)) &], 

   DynamicWrapper[Dynamic@s, 
    If[clock == Round[s], 
     EmitSound[Sound@SoundNote["C", 0.5, "Flute"]]], 
    UpdateInterval -> 1]}]

Using the rotated secondHand:

DynamicModule[{pt = {0, 1}, secondHand = Line[{{0, 0}, {0, 55}}], rSH}, 
 Column@
  {ClickPane[
    Dynamic[Show[Graphics[Circle[{0, 0}, 60]], 

      Graphics[
       Dynamic[{rSH = Rotate[secondHand, Clock[{0, 59, 1}]*-Pi/30, {0, 0}]}]], 
      Graphics[{Red, Point[pt]}]]], 
    (pt = #; s = 30*(1 + ArcTan[-pt[[2]], -pt[[1]]]/Pi)) &], 
   DynamicWrapper[Dynamic@s, 
    If[rSH[[2]]*-30/Pi == Round[s], 
     EmitSound[Sound@SoundNote["C", 0.5, "Flute"]]], 
    UpdateInterval -> 1]}]

Comments

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