edu.ufl.hcs.ppw.vis.ColorGradient Class Reference

Draws a color gradient with a key next to it; useful for visually showing numbers on a scale. More...

Inherits javax::swing::JPanel.

List of all members.

Public Member Functions
	ColorGradient (double max, String caption, int numLabels, String labelFormat)
	Constructor.
void	updateGradient (double max, String caption, int numLabels, String labelFormat)
	Update the gradient with new values.
Dimension	getMinimumSize ()
Dimension	getMaximumSize ()
Dimension	getPreferredSize ()
void	paintComponent (Graphics g)
	Override painter to draw gradient.
Static Public Member Functions
static Color	getColor (float pct)
	Gets a color for a percentage.
Package Attributes
int	numLabels
double	maxVal
String	sLabel
String	sFormat
Dimension	minDim
Dimension	maxDim
DecimalFormat	formatter
Static Package Attributes
static final int	STEPSIZE = 10
	To speed rendering, we draw the gradient this many pixels at a time.
static final int	PADDING = 5
	Padding between gradient and edge of panel, in pixels.
static final int	WIDTH = 125
	Width.
static final int	BARWIDTH = 25
	Width of color bars.
static final int	LABELHEIGHT = 50
	Height of label.

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Detailed Description

Draws a color gradient with a key next to it; useful for visually showing numbers on a scale.

Author:

Adam Leko

Max Billingsley III

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Constructor & Destructor Documentation

edu.ufl.hcs.ppw.vis.ColorGradient.ColorGradient	(	double	max,
		String	caption,
		int	numLabels,
		String	labelFormat
	)

Constructor.

See updateGradient() for an explanation of the parameters.

References edu.ufl.hcs.ppw.vis.ColorGradient.updateGradient(), and edu.ufl.hcs.ppw.vis.ColorGradient.WIDTH.

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Member Function Documentation

static Color edu.ufl.hcs.ppw.vis.ColorGradient.getColor

(

float

pct

)

[static]

Gets a color for a percentage.

Useful for other visualizations so that the colors displayed match the. Note that since the parameter is expressed in terms of a fraction, the color returned is independent of the current scale.

Additionally, depending on how getHSBColor() is implemented, we might be able to save a little bit on memory consumption by preloading a table of 100 or so colors and rounding all percentages to entries in that table. Since this function doesn't seem to be contributing much to overall execution time, it's probably worth it to keep this the way it is so we get more accurate colors.

Referenced by edu.ufl.hcs.ppw.vis.ColorGradient.paintComponent().

void edu.ufl.hcs.ppw.vis.ColorGradient.updateGradient	(	double	max,
		String	caption,
		int	numLabels,
		String	labelFormat
	)

Update the gradient with new values.

Parameters:

	max	Maximum value to show
	caption	Label (centered) to show underneath the gradient
	numLabels	Number of labels to show next to the gradient
	labelFormat	Formatting to use for each label

Referenced by edu.ufl.hcs.ppw.vis.ColorGradient.ColorGradient(), and edu.ufl.hcs.ppw.vis.comm.CommunicationPanel.update().

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The documentation for this class was generated from the following file:

• javasrc/src/edu/ufl/hcs/ppw/vis/ColorGradient.java