com.java4less.rchart.swt
Class ChartViewer

java.lang.Object
  |
  +--Composite
        |
        +--com.java4less.rchart.swt.ChartViewer

public class ChartViewer

extends Composite

This class is a SWT control which can be added to any SWT Control or window. The viewer implements the following features: 
- It displays the chart you set with the setChart() method.
- It implements scroll bars and zoom in/out buttons. 
- It can automatically change the cursor when the pointer moves over a value in the chart.
 
The following is a very simple SWT java program which uses the chart viewer:

Display display = new Display();
// set Rchart SWT mode
GraphicsProvider.setMode(GraphicsProvider.MODE_SWT); 
SwtGraphicsProvider.setDefaultDisplay(display);


Shell shell = new Shell(display);
shell.setSize(300,300);
shell.setBounds(100,100,400,400);

// create chart
ChartLoader cloader=new ChartLoader();
cloader.loadFromFile("areaChart.txt",false); // load chart parameters from file
Chart chart=cloader.build(false,false);

// create chart viewer and set the chart
ChartViewer chartViewer=new ChartViewer(shell,SWT.NONE);
chartViewer.setBounds(0,0,400,400); 
chartViewer.setChart(chart);

shell.open();


while(!shell.isDisposed())
if(!display.readAndDispatch())
display.sleep();
display.dispose();
chart.dispose();

See Also:

Serialized Form

Field Summary

boolean	allowZoom if TRUE the +/- zoom buttons will be made visible.
boolean	changePointer change mouse pointer when we are over a point
int	currentZoom current value of zoom (initial value is 100)
int	maxZoom maximum zoom in %.
int	minZoom minimum zoom in %.
int	zoomIncrement zoom increment in % for the +/- buttons.

Constructor Summary

ChartViewer(Composite parent, int style)

Method Summary

void	dispose() dispose control
Chart	getChart() get chart to display
void	redrawChart() force the chart to be repainted
void	setChart(Chart c) set chart to display

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

allowZoom

public boolean allowZoom

if TRUE the +/- zoom buttons will be made visible.

maxZoom

public int maxZoom

maximum zoom in %. The default is 300.

minZoom

public int minZoom

minimum zoom in %. The default is 50.

currentZoom

public int currentZoom

current value of zoom (initial value is 100)

zoomIncrement

public int zoomIncrement

zoom increment in % for the +/- buttons. The default is 25.

changePointer

public boolean changePointer

change mouse pointer when we are over a point

Constructor Detail

ChartViewer

public ChartViewer(Composite parent,
                   int style)

Method Detail

getChart

public Chart getChart()

get chart to display

Returns:

setChart

public void setChart(Chart c)

set chart to display

Parameters:

c -

dispose

public void dispose()

dispose control

redrawChart

public void redrawChart()

force the chart to be repainted