GuiGraphCtrl Class Reference
[Value Controls]

A control that plots one or more curves in a chart. More...

Inheritance diagram for GuiGraphCtrl:

[legend]

List of all members.

Public Member Functions
void	addAutoPlot (int plotId, string variable, int updateFrequency)
	Sets up the given plotting curve to automatically plot the value of the variable with a frequency of updateFrequency.
void	addDatum (int plotId, float value)
	Add a data point to the plot's curve.
float	getDatum (int plotId, int index)
	Get a data point on the given plotting curve.
void	matchScale (int plotID1, int plotID2,...)
	Set the scale of all specified plots to the maximum scale among them.
void	removeAutoPlot (int plotId)
	Stop automatic variable plotting for the given curve.
void	setGraphType (int plotId, GuiGraphType graphType)
	Change the charting type of the given plotting curve.
Public Attributes
Graph
float	centerY
	Ratio of where to place the center coordinate of the graph on the Y axis. 0.5=middle height of control.
ColorF	plotColor [6]
	Color to use for the plotting curves in the graph.
int	plotInterval [6]
	Interval between auto-plots of plotVariable for the respective curve (in milliseconds).
GuiGraphType	plotType [6]
	Charting type of the plotting curves.
string	plotVariable [6]
	Name of the variable to automatically plot on the curves. If empty, auto-plotting is disabled for the respective curve.

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Detailed Description

A control that plots one or more curves in a chart.

Up to 6 individual curves can be plotted in the graph. Each plotted curve can have its own display style including its own charting style (plotType) and color (plotColor).

The data points on each curve can be added in one of two ways:

• Manually by calling addDatum(). This causes new data points to be added to the left end of the plotting curve.
• Automatically by letting the graph plot the values of a variable over time. This is achieved by calling addAutoPlot and specifying the variable and update frequency.

Example:

// Create a graph that plots a red polyline graph of the FPS counter in a 1 second (1000 milliseconds) interval.
new GuiGraphCtrl( FPSGraph )
{
   plotType[ 0 ] = "PolyLine";
   plotColor[ 0 ] = "1 0 0";
   plotVariable[ 0 ] = "fps::real";
   plotInterval[ 0 ] = 1000;
};

Note:

Each curve has a maximum number of 200 data points it can have at any one time. Adding more data points to a curve will cause older data points to be removed.

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Member Function Documentation

void GuiGraphCtrl::addAutoPlot	(	int	plotId,
		string	variable,
		int	updateFrequency
	)

Sets up the given plotting curve to automatically plot the value of the variable with a frequency of updateFrequency.

Parameters:

	plotId	Index of the plotting curve. Must be 0<=plotId<6.
	variable	Name of the global variable.
	updateFrequency	Frequency with which to add new data points to the plotting curve (in milliseconds).

Example:

// Plot FPS counter at 1 second intervals.
%graph.addAutoPlot( 0, "fps::real", 1000 );

void GuiGraphCtrl::addDatum	(	int	plotId,
		float	value
	)

Add a data point to the plot's curve.

Parameters:

	plotId	Index of the plotting curve to which to add the data point. Must be 0<=plotId<6.
	value	Value of the data point to add to the curve.

Note:

Data values are added to the left end of the plotting curve.

A maximum number of 200 data points can be added to any single plotting curve at any one time. If this limit is exceeded, data points on the right end of the curve are culled.

float GuiGraphCtrl::getDatum	(	int	plotId,
		int	index
	)

Get a data point on the given plotting curve.

Parameters:

	plotId	Index of the plotting curve from which to fetch the data point. Must be 0<=plotId<6.
	index	Index of the data point on the curve.

Returns:

The value of the data point or -1 if plotId or index are out of range.

void GuiGraphCtrl::matchScale	(	int	plotID1,
		int	plotID2,
			...
	)

Set the scale of all specified plots to the maximum scale among them.

Parameters:

	plotID1	Index of plotting curve.
	plotID2	Index of plotting curve.

void GuiGraphCtrl::removeAutoPlot

(

int

plotId

)

Stop automatic variable plotting for the given curve.

Parameters:

plotId

Index of the plotting curve. Must be 0<=plotId<6.

void GuiGraphCtrl::setGraphType	(	int	plotId,
		GuiGraphType	graphType
	)

Change the charting type of the given plotting curve.

Parameters:

	plotId	Index of the plotting curve. Must be 0<=plotId<6.
	graphType	Charting type to use for the curve.

Note:

Instead of calling this method, you can directly assign to plotType.

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Member Data Documentation

float GuiGraphCtrl::centerY

Ratio of where to place the center coordinate of the graph on the Y axis. 0.5=middle height of control.

This allows to account for graphs that have only positive or only negative data points, for example.

ColorF GuiGraphCtrl::plotColor[6]

Color to use for the plotting curves in the graph.

int GuiGraphCtrl::plotInterval[6]

Interval between auto-plots of plotVariable for the respective curve (in milliseconds).

GuiGraphType GuiGraphCtrl::plotType[6]

Charting type of the plotting curves.

string GuiGraphCtrl::plotVariable[6]

Name of the variable to automatically plot on the curves. If empty, auto-plotting is disabled for the respective curve.