gwy.GraphCurveModel

Module gwy :: Class GraphCurveModel

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Class GraphCurveModel

GraphCurveModel The ::data-changed signal is emitted whenever curve data is set with a function like Graph.curve_model_set_data().

('gwygraphcurvemodel', ' The #GwyGraphCurveModel which received the signal. ')

Method Summary
	`__init__()` Creates a new graph curve model.
	`get_ndata()` Return number of data points within the curve data
	`get_ranges(x_logscale, y_logscale, x_min, x_max, y_min, y_max)`
	`get_x_range(x_min, x_max)` Gets the abscissa range of a graph curve.
	`get_xdata()` Gets pointer to x data points.
	`get_y_range(y_min, y_max)` Gets the ordinate range of a graph curve.
	`get_ydata()` Gets pointer to y data points.
	`new_alike()` Creates new graph curve model object that has the same settings as `gcmodel`.
	`set_data(xdata, ydata, n)` Sets curve model data.
	`set_data_from_dataline(dline, from_index, to_index)` Sets the curve data from `DataLine`.

Method Details

init()
(Constructor)

Creates a new graph curve model.

Returns:: New empty graph curve model as a GObject.

get_ndata()

Returns:: number of data points within the curve data

get_x_range(x_min, x_max)

Gets the abscissa range of a graph curve.

The values are cached in the curve model therefore repeated calls to this function (with unchanged data) are cheap.

If there are no data points in the curve, x_min and x_max are untouched and the function returns False.

See also Graph.curve_model_get_ranges() for a more high-level function.

Parameters:: x_min - Location to store the minimum abscissa value, or NULL. (float); x_max - Location to store the maximum abscissa value, or NULL. (float)

Returns:: True if there are any data points in the curve and x_min, x_max were set.

get_xdata()

Gets pointer to x data points.

Data are used within the graph and cannot be freed.

Returns:: X data points, owned by the curve model.

get_y_range(y_min, y_max)

Gets the ordinate range of a graph curve.

The values are cached in the curve model therefore repeated calls to this function (with unchanged data) are cheap.

If there are no data points in the curve, x_min and x_max are untouched and the function returns False.

See also Graph.curve_model_get_ranges() for a more high-level function.

Parameters:: y_min - Location to store the minimum ordinate value, or NULL. (float); y_max - Location to store the maximum ordinate value, or NULL. (float)

Returns:: True if there are any data points in the curve and x_min, x_max were set.

get_ydata()

Gets pointer to y data points.

Data are used within the graph and cannot be freed.

Returns:: Y data points, owned by the curve model.

new_alike()

Creates new graph curve model object that has the same settings as gcmodel.

Curve data are not duplicated.

Returns:: New graph curve model.

set_data(xdata, ydata, n)

Sets curve model data.

Parameters:: xdata - X data points (array of size n). (const-gdouble*); ydata - Y data points (array of size n). (const-gdouble*); n - Number of points, i.e. items in xdata and ydata. (int)

set_data_from_dataline(dline, from_index, to_index)

Sets the curve data from DataLine. The range of import can be modified using parameters from_index and to_index that are interpreted directly as data indices within the DataLine. In the case that from_index == to_index, the full DataLine is used.

Parameters:: dline - A DataLine (DataLine); from_index - index where to start (int); to_index - where to stop (int)

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