org.vishia.gral.swt

Class SwtCurveView.CurveViewSwtWidget

java.lang.Object

Canvas

org.vishia.gral.swt.SwtCurveView.CurveViewSwtWidget

Enclosing class:

SwtCurveView

private class SwtCurveView.CurveViewSwtWidget
extends Canvas

Field Summary

Fields

Modifier and Type	Field and Description
(package private) FocusListener	focusListener
(package private) PaintListener	paintListener The paint event is forced by an handling on operation system, for example hide or show a window, resize etc. pp.

Constructor Summary

Constructors

Constructor and Description
CurveViewSwtWidget(Composite parent, int xPixel, int yPixel, int nrofXvalues)

Method Summary

Modifier and Type	Method and Description
void	drawBackground(GC g, int xView, int yView, int dxView, int dyView) This routine overrides
void	redrawData()
void	setGridHorizontal(float percentY, int periodStrongLine) Set distance for horizontal grid lines.
void	setGridVertical(int dataPointsBetweenGridLines, int periodStrongLine)

Methods inherited from class java.lang.Object

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

Field Detail

paintListener

PaintListener paintListener

The paint event is forced by an handling on operation system, for example hide or show a window, resize etc. pp. It is also forced by new data, from calling of SwtCurveView.redrawGthread().

focusListener

FocusListener focusListener

Constructor Detail

CurveViewSwtWidget

public CurveViewSwtWidget(Composite parent,
                          int xPixel,
                          int yPixel,
                          int nrofXvalues)

Method Detail

setGridVertical

public void setGridVertical(int dataPointsBetweenGridLines,
                            int periodStrongLine)

setGridHorizontal

public void setGridHorizontal(float percentY,
                              int periodStrongLine)

Set distance for horizontal grid lines.

Parameters:

percentY - percent of y-view for grid lines. For example 50.0: divide y-axis in 50 steps.

periodStrongLine - period for strong lines For example 5, any 5. line is stroke.

redrawData

public void redrawData()

drawBackground

public void drawBackground(GC g,
                           int xView,
                           int yView,
                           int dxView,
                           int dyView)

This routine overrides

See Also:

It is called in this class in {@link #paintListener} in the {@link PaintListener#paintControl(PaintEvent)} method. It draws the whole content.

Because of saving calculation time there will be drawn only a small peace on right side of the area with the new data normally. The rest inclusive grid lines, curves, text is moved to left. But if the whole window should be refreshed, the whole widget is drawn newly.