How to react on pressed keys
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## How to react on pressed keys

Put the following code into the on_key action of a lineedit field:

Example 5.13. Reacting on keyboard input

    key=hk_this.key()
    print "on_key=(",key.key(),")(",key.text(),")"
    if key.state()&key.state_ctrl:
      print "ctrl"
    if key.state()&key.state_shift:
      print "shift"
    if key.state()&key.state_alt:
      print "alt"

    if key.key()==key.key_F5:
     show_warningmessage("F5 pressed. This will be ignored")
     key.set_accept_key(False)

    if key.key()==key.key_M and key.state()&key.state_ctrl:
     show_warningmessage("ctrl m pressed")

when the on_key action is triggered an object of type hk_key is created and can be called via hk_this.key(). If you set the hk_key.set_accept_key() method to 'False', the key will not be accepted as input.

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