LCDSystemSensor Class Reference
[Sensors]

#include "api/LCDSystemSensor.h"

Inheritance diagram for LCDSystemSensor:

[legend]Collaboration diagram for LCDSystemSensor:

[legend]List of all members.

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Detailed Description

This sensor takes a shell command (that can call external programs) and returns first line of its output.

Definition at line 12 of file LCDSystemSensor.h.

Public Member Functions
virtual void	waitForChange ()
	Returns when a change occured on the measured value.
virtual std::string	getCurrentValue ()
	Get the current value measured by the sensor.
	LCDSystemSensor (const std::string &command)
	Default constructor.
std::string	intToString (int value)
	Convert an integer to a string.
std::string	executeCommand (const std::string &cmd)
	Execute an external command.
void	addOnChangeWidget (LCDWidget *widget)
	Add a new widget that must be set when the sensor value changes.
void	addOnTimeOutWidget (LCDWidget *widget, int timeOut)
	Add a new widget that must be changed regularly.
void	removeOnChangeWidget (LCDWidget *widget)
	Remove a widget that was added with addOnChangeWidget.
void	removeOnChangeWidget (std::string id)
	Remove a widget that was added with addOnChangeWidget.
void	removeOnTimeOutWidget (LCDWidget *widget)
	Remove a widget that was added with addOnTimeOutWidget.
void	removeOnTimeOutWidget (std::string id)
	Remove a widget that was added with addOnTimeOutWidget.

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Constructor & Destructor Documentation

LCDSystemSensor (  const std::string &  command  )

Used to build such a sensor. Parameters: command  A string containing the shell command to execute. Definition at line 10 of file LCDSystemSensor.cpp.

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Member Function Documentation

void addOnChangeWidget (  LCDWidget *  widget  )  [inherited]

This method is used to associate a wiget to a sensor. When the sensor value change, the widget value will be changed accordingly. Parameters: widget  The widget to associate with this sensor. Examples: client.cpp. Definition at line 108 of file LCDSensor.cpp.

void addOnTimeOutWidget (  LCDWidget *  widget, int  timeOut )  [inherited]

This method is used to associate a wiget to a sensor. Each time the specified timeout ellapsed, widget value is changed. Parameters: widget  The widget to associate with this sensor. timeOut  The time to wait between each update (second tenths). Definition at line 137 of file LCDSensor.cpp.

string executeCommand (  const std::string &  cmd  )  [inherited]

This method can be used to invoke another program and get its output. Only the first line is returned. Parameters: cmd  The command to execute as if a shell is used. Returns: A string containing the first line of the command output. Definition at line 88 of file LCDSensor.cpp.

string getCurrentValue (   )  [virtual]

This virtual function should be implemented by a real sensor. It should return the current value as a string. Returns: Current value of the sensor. Implements LCDSensor. Definition at line 20 of file LCDSystemSensor.cpp.

string intToString (  int  value  )  [inherited]

Utility function to convert an integer to a string so it can be returned by getCurrentValue. It should return the current value as a string. Parameters: value  The integer value to convert. Returns: String version of the value. Definition at line 83 of file LCDSensor.cpp.

void removeOnChangeWidget (  std::string  id  )  [inherited]

This method is used to delete the association between a wiget and a sensor. Parameters: id  The identifier of the widget to remove from sensor configuration. Definition at line 124 of file LCDSensor.cpp.

void removeOnChangeWidget (  LCDWidget *  widget  )  [inherited]

This method is used to delete the association between a wiget and a sensor. Parameters: widget  The widget to remove from sensor configuration. Definition at line 119 of file LCDSensor.cpp.

void removeOnTimeOutWidget (  std::string  id  )  [inherited]

This method is used to delete the association between a wiget and a sensor. Parameters: id  The identifier of the widget to remove from sensor configuration. Definition at line 155 of file LCDSensor.cpp.

void removeOnTimeOutWidget (  LCDWidget *  widget  )  [inherited]

This method is used to delete the association between a wiget and a sensor. Parameters: widget  The widget to remove from sensor configuration. Definition at line 150 of file LCDSensor.cpp.

void waitForChange (   )  [virtual]

This virtual function should be implemented by a real sensor. It should wait for the value to change and then just return. Implements LCDSensor. Definition at line 15 of file LCDSystemSensor.cpp.

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