Global Mouse Up

[tulamide]

I want to start by saying, that this is mostly outdated! But, it seems there is an issue with the right mouse button up trigger, so maybe you can adapt this example for your needs. For left mouse button always use the existing "...captured" methods!!!

So, back in the days, I didn't know of the existence of mouseLUpCaptured (it was never documented). And of course I ran into problems, as soon as I dragged the mouse outside of the panel view, because a mouseLUp will then never be caught.

My solution was this. It is an excerpt from a longer code.

Code: Select all

def event i, v
   releaseMouse if i == 'externalMouseUp'
   redraw if i != 'display'
end

def isInMousePoint x, y
   true
end

def mouseLDown x, y
   if y > @sl_off + @pos * @sl_net and y < @sl_w + @sl_off + @pos * @sl_net
      if x > @sl_off and x < @sl_width + @sl_off
         @delta = y - @pos * @sl_net
         captureMouse
      end
   end
end

def mouseMoveCaptured x, y
   nx = (y - @sl_off - @delta) / @sl_net
   @pos = [0, nx, 1].sort[1]
   redraw
   if @outs[0] != (@pos * @rows).round
      output 'current', (@pos * @rows).round
   end
end

def mouseLUp x, y
   redraw
   output 'current', (@pos * @rows).round
   releaseMouse
end

def mouseCursor x, y
   2
end

As you can see, it uses mouseLUp, not mouseLUpcaptured, but it works reliably. Why? Have a look at the event method defintion. releaseMouse if i == 'externalMouseUp' releases the mouse when a trigger arrives at an input that I called externalMouseUp. You can call it whatever you like. But you need an input and an instruction to release the mouse when it triggers.

To this input you connect a wireless receiver.

mouse_up001.png (12.61 KiB) Viewed 11509 times

Then you need to go to the top layer. The top MGUI, to be precise. Here we add a wireless module. It contains simple code to catch a mouse up and send a trigger.

mouse_up002.png (10.2 KiB) Viewed 11509 times

mouse_up003.png (12.3 KiB) Viewed 11509 times

This works, because a mouse up event doesn't vanish, if it isn't handled on that layer. It will be transmitted to all layers that are connected by the MGUI's yellow "V" link. All of them build a chain, with the top layer MGUI being the last to receive that unhandled mouse up event. It catches it and sends a trigger, and each RubyEdit receiving it will release the mouse. It isn't harmful to release the mouse when it was already released by another RubyEdit.

But, remember, this is just a workaround for a problem that doesn't exist anymore for years. It could only be helpful for the right mouse button. But I didn't test it.