Documentation > nControl > API Reference
Level Crossing Light Tile
nControl™ 2021.0
These tiles control level crossing lights.
Introduction
When you click on the tile it switches the level crossing lights on or off unless you override it by a custom procedure.
Event Scripts
Level crossing light tiles support the following event scripts:
  • Activate tile event: is executed when the tile is activated by switching to simulation of operational mode.
  • Deactivate tile event: is executed when the tile is deactivated by switching to design of configuration mode.
  • Mouse click event: is executed when the user clicks on the tile.
API Functions
Tile Specific Functions
nLevelCrossingLightTile.clickTile()
Simulates a mouse click on the tile; this executes the mouse click event script.
nLevelCrossingLightTile.getState()
Returns the current state of the level crossing lights:
  • nConst.LC_OFF
  • nConst.LC_ON
nLevelCrossingLightTile.getStyle()
Returns the flashing style of level crossing lights:
  • nConst.LC_INPHASE:
  • nConst.LC_ANTIPHASE:
nLevelCrossingLightTile.publish(topic, data)
Publishes a message through the internal MQTT broker using the specified topic and data.
nLevelCrossingLightTile.sendMessage(data)
Sends the ASCII message data to a generic controller, e.g. a Arduino board.
nLevelCrossingLightTile.setOff()
Switches the level crossing light off.
nLevelCrossingLightTile.setOn()
Switches the level crossing light on.
Inherited from nTile
nLevelCrossingLightTile.clearScreen()
Clear all the text in the console window.
nLevelCrossingLightTile.getTile(label)
Returns the tile object specified by label. If there is no tile with the specified label, the function returns a None value.
nLevelCrossingLightTile.print(text)
Prints text in the console window. If the console window it not yet visible, printing text will make it visible.
nLevelCrossingLightTile.showConsole(mode)
Shows (mode = True) or hides (mode = False) the console window.
nLevelCrossingLightTile.sleep(duration)
Stops the execution of the script for the the given number of seconds. Note that duration can be a floating point number, e.g. to suspend the script for half a seconds use self.sleep(0.5).
nLevelCrossingLightTile.timestamp()
Returns the number of seconds that passed since nControl™ was launched. It returns a floating point value with the highest possible time resolution supported by your system. The difference between two time stamps provides the number of seconds elapsed between those two events.
nLevelCrossingLightTile.localVars
Base property to which you can add local variables that retain their value after the event script finishes. For example self.localVars.myVar = 5 adds a new property myVar to self.localVars and gives it the value 5. The localVars property is local to the current tile meaning that each tile has its own independent localVars property.
nLevelCrossingLightTile.globalVars
Base property to which you can add global variables that retain their value after the event script finishes. For example self.globalVars.myVar = 5 adds a new property myVar to self.globalVars and gives it the value 5. The globalVars property is global to nControl meaning that all tiles use the same globalVars property. As such globalVars can be used to exchange information between the tiles.