Config¶

Methods:

The Config class provides access to Leap Motion system configuration information.

You can get and set gesture configuration parameters using the Config object obtained from a connected Controller object. The key strings required to identify a configuration parameter include:

Key string	Value type	Default value	Units
Gesture.Circle.MinRadius	float	5.0	mm
Gesture.Circle.MinArc	float	1.5 * pi	radians
Gesture.Swipe.MinLength	float	150	mm
Gesture.Swipe.MinVelocity	float	1000	mm/s
Gesture.KeyTap.MinDownVelocity	float	50	mm/s
Gesture.KeyTap.HistorySeconds	float	0.1	s
Gesture.KeyTap.MinDistance	float	3.0	mm
Gesture.ScreenTap.MinForwardVelocity	float	50	mm/s
Gesture.ScreenTap.HistorySeconds	float	0.1	s
Gesture.ScreenTap.MinDistance	float	5.0	mm

After setting a configuration value, you must call the Config::save() method to commit the changes. You can save after the Controller has connected to the Leap Motion service/daemon. In other words, after the Controller has dispatched the serviceConnected or connected events or Controller::isConnected is true. The configuration value changes are not persistent; your application needs to set the values every time it runs.

See

CircleGesture

See

KeyTapGesture

See

ScreenTapGesture

See

SwipeGesture

Since

1.0

Public Type

ValueType enum

Enumerates the possible data types for configuration values.

The Config::type() function returns an item from the ValueType enumeration.

Since

1.0

Values:

• TYPE_UNKNOWN = = 0 -

  The data type is unknown.

  Since

  1.0

• TYPE_BOOLEAN = = 1 -

  A boolean value.

  Since

  1.0

• TYPE_INT32 = = 2 -

  A 32-bit integer.

  Since

  1.0

• TYPE_FLOAT = = 6 -

  A floating-point number.

  Since

  1.0

• TYPE_STRING = = 8 -

  A string of characters.

  Since

  1.0

Public Functions

Config()

Constructs a Config object.

Do not create your own Config objects. Get a Config object using the Controller::config() function.

Leap::Config config = controller.config();

Since

1.0

bool getBool(const std::string & key)

Gets the boolean representation for the specified key.

bool booleanValue = controller.config().getBool("Key.For.Bool.Setting");

Since

1.0

float getFloat(const std::string & key)

Gets the floating point representation for the specified key.

float floatValue = controller.config().getFloat("Gesture.Swipe.MinLength");

Since

1.0

int32_t getInt32(const std::string & key)

Gets the 32-bit integer representation for the specified key.

int32_t intValue = controller.config().getInt32("Key.For.Integer.Setting");

Since

1.0

std::string getString(const std::string & key)

Gets the string representation for the specified key.

std::string stringValue = controller.config().getString("Key.For.String.Setting");

Since

1.0

bool save()

Saves the current state of the config.

Call save() after making a set of configuration changes. The save() function transfers the configuration changes to the Leap Motion service. You can save after the Controller has connected to the Leap Motion service/daemon. In other words, after the Controller has dispatched the serviceConnected or connected events or Controller::isConnected is true. The configuration value changes are not persistent; your application must set the values every time it runs.

controller.config().setFloat("Gesture.Circle.MinRadius", 15);
controller.config().setFloat("Gesture.Circle.MinArc", 1.7);
bool success = controller.config().save();

Return

true on success, false on failure.

Since

1.0

bool setBool(const std::string & key, bool value)

Sets the boolean representation for the specified key.

controller.config().setBool("tracking_tool_enabled", true);
controller.config().save();

Return

true on success, false on failure.

Since

1.0

bool setFloat(const std::string & key, float value)

Sets the floating point representation for the specified key.

controller.config().setFloat("Gesture.Circle.MinRadius", 15);
controller.config().save();

Return

true on success, false on failure.

Since

1.0

bool setInt32(const std::string & key, int32_t value)

Sets the 32-bit integer representation for the specified key.

controller.config().setInt32("background_app_mode", 2);
controller.config().save();

Return

true on success, false on failure.

Since

1.0

bool setString(const std::string & key, const std::string & value)

Sets the string representation for the specified key.

controller.config().setString("Key.For.String.Setting", "A String");
controller.config().save();

Return

true on success, false on failure.

Since

1.0

ValueType type(const std::string & key)

Reports the natural data type for the value related to the specified key.

Leap::Config::ValueType dataType = controller.config().type("Gesture.KeyTap.MinDistance");

Return

The native data type of the value, that is, the type that does not require a data conversion.

Since

1.0

Parameters

• key -

  The key for the looking up the value in the configuration dictionary.