Last Updated: 3/4/97
Class NFStripChart
Class NFStripChart
public class NFStripChart extends NFDataChart
Strip chart base class. See NFStripChartApp for parameter
interface information.
Instance Variables
|
Type |
|
Name |
|
Description |
|
Default |
|
Vector |
|
bottomLabels |
|
Holds the bottom labels |
|
new Vector() |
|
Rectangle |
|
graphRect |
|
chart rectangle less titles/axes |
|
null |
|
int |
|
initialFill |
|
the side chart begins drawing on |
|
LEFT |
|
Color |
|
labelBackgroundColor |
|
color used for dynamic axes |
|
null |
|
int |
|
maxLookAhead |
|
buffer size |
|
100 |
|
int |
|
nslots |
|
number of steps in the X axis |
|
11 |
|
Vector |
|
topLabels |
|
Holds the top labels |
|
new Vector() |
|
String |
|
undefString |
|
undefined data string |
|
"-" |
|
Rectangle |
|
workRect |
|
chart rectangle less titles |
|
null |
Final Variables
|
Type |
|
Name |
|
Description |
|
int |
|
LEFT |
|
|
|
int |
|
RIGHT |
|
|
Constructors
Methods
- appendNewData(int dataset, double yvalue) throws Exception
- appendNextActiveSlot (NFDataSeries ds, int dsIndex, int xvalue, double yvalue)
- appendNextAxisLabel(boolean isTopLabels)
- appendNextSlot()
- configure(Graphics g, Rectangle workRect)
- defineParams ()
- defineStripAxisParams(NFParam p, String name)
- drawAxes(Graphics g, boolean resetLabels)
- drawData(Graphics g)
- drawDataLite(Graphics g)
- drawGraph(Graphics g, Rectangle r)
- drawGraphLite(Graphics g)
- drawGroupBars (Graphics g, boolean resetLabels)
- drawPoints (Graphics g, NFDataSeries ds, int dsIndex, boolean resetLabels)
- drawPoints (Graphics g, boolean resetLabels)
- drawStackedBars (Graphics g, boolean resetLabels)
- getMinMax (NFDataSeries ds, NFAxis axis, double minmax[])
- initStripChart()
- loadAxisParams (String name, NFAxis axis) throws Exception
- loadParams () throws Exception
- loadStripAxisParams(NFParam param, String axisName, NFAxis axis) throws Exception
- makeNewDataSet(Color c, NFGraphSymbol sym, NFLine line, Color fillColor)
- recomputeData()
- setupAxisTics (NFAxis axis, int slotsPerTic, boolean resetLabels)
- shiftActiveLabelArray()
- slotsChanged()
NFStripChart (Applet a)
-
Constructor for NFStripChart class.
-
NFStripChart (Applet a,
int x,
int y,
int w,
int h)
-
Constructor for NFStripChart class.
-
protected void appendNewData(int dataset,
double yvalue) throws Exception
-
appends the raw data value to the appropriate dataset.
-
protected void appendNextActiveSlot (NFDataSeries ds,
int dsIndex,
int xvalue,
double yvalue)
-
Appends another active label for the data set if necessary
-
protected void appendNextAxisLabel(boolean isTopLabels)
-
Manages the axis labels for the top and bottom axis. This is
a particularly tricky routine since there are several different
ways labels can be used.
o DYNAMIC feed from the left
o DYNAMIC feed from the right
o STATIC feed from the left
o STATIC feed from the right
o Autogenerated labels
o Passed in labels
o STATIC tics with dynamic data
o STATIC tics with static data
-
To do this, 3 label "queues" are used. The slotLabels queue is only
used for STATIC tics and holds a label for each possible slot. The
labels queue is what the axis will receive to display and should
contain the same number of labels as there are tics. The labelQueue
is a list of input labels that have not been displayed yet. The
labelQueue will hold labels entered using TopLabels/BottomLabels
attributes or labels generated automatically. When a new label is
needed, it is pulled from the labelQueue and put into either the
slotLabels queue or labels queue.
-
protected void appendNextSlot()
-
Extracts a point from each data set and computes its y value.
-
private void configure(Graphics g,
Rectangle workRect)
-
called if the size of the drawing area changes - recomputes relative
placement of axes and the chart.
-
protected void defineParams ()
-
Defines strip chart specific parameters
-
protected void defineStripAxisParams(NFParam p,
String name)
-
Generic routine to define an stripaxis parameter
-
void drawAxes(Graphics g,
boolean resetLabels)
-
draws the bottom and top axes
-
protected void drawData(Graphics g)
-
this method required by NFDataChart (abstract method)
-
protected void drawDataLite(Graphics g)
-
this method required by NFDataChart (abstract method)
-
protected void drawGraph(Graphics g,
Rectangle r)
-
does a complete Strip Chart redraw.
-
protected void drawGraphLite(Graphics g)
-
Provides for quick, incremental draws.
-
private void drawGroupBars (Graphics g,
boolean resetLabels)
-
Draw all bars in groups
-
private void drawPoints (Graphics g,
NFDataSeries ds,
int dsIndex,
boolean resetLabels)
-
Draw all of the points and/or lines for the given data set
-
private void drawPoints (Graphics g,
boolean resetLabels)
-
Draw all data sets. If resetLabels is true, then update
the positions of all active labels. Otherwise, simply
update the position of the last one drawn (which was
probably just added)
-
private void drawStackedBars (Graphics g,
boolean resetLabels)
-
Draw all bars as a stacked bar
-
protected double[] getMinMax (NFDataSeries ds,
NFAxis axis,
double minmax[])
-
Updates the min/max values for the given data set, along
the given axis. This method should be overridden by higher
level objects to deal with different data set types.
-
protected void initStripChart()
-
initialize axes and grids
-
protected NFAxis loadAxisParams (String name,
NFAxis axis) throws Exception
-
Overrides NFDataChart so that the top and bottom axis are loaded
using the strip chart definitions
-
protected synchronized void loadParams () throws Exception
-
overrides NFDataChart loadParams()
-
protected NFAxis loadStripAxisParams(NFParam param,
String axisName,
NFAxis axis) throws Exception
-
Generic routine to define an stripaxis parameter
-
private void makeNewDataSet(Color c,
NFGraphSymbol sym,
NFLine line,
Color fillColor)
-
creates a new strip chart data set
-
private void recomputeData()
-
Recompute the Y-value screen coordinates for all datasets
-
protected void setupAxisTics (NFAxis axis,
int slotsPerTic,
boolean resetLabels)
-
Setup the axis tic positions, using current dataCount
-
private void shiftActiveLabelArray()
-
active labels are stored in a 2 dimensional array to allow for
easy shifting to the left as more data is added. The actual objects
do not get shifted; only the data.
-
protected void slotsChanged()
-
Called when the number of slots or other slot-related parameter
changes. Adjusts tic positions and slot xvalues.
-