org.vishia.gral.swt

Class SwtWdgCanvas

java.lang.Object

Canvas

org.vishia.gral.swt.SwtWdgCanvas

Direct Known Subclasses:

SwtGridPanel.XXXSwtCanvasGridPanel

public class SwtWdgCanvas
extends Canvas

This class enhances the swt widget Canvas with some operations, especially the drawBackground from GralCanvasStorage.

See Also:

https://www.eclipse.org/articles/Article-SWT-graphics/SWT_graphics.html

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	SwtWdgCanvas.AccessFigure Inherited class only for protected access to GralCanvasStorage.Figure data.
private static class	SwtWdgCanvas.SwtFigureData This are data for only one widget.

Field Summary

Fields

Modifier and Type	Field and Description
private GralCanvasStorage	canvasStore
(package private) SwtWdgCanvas.AccessFigure	figAccess
protected PaintListener	paintListener The listener for paint events.
private java.util.Map<java.lang.String,SwtWdgCanvas.SwtFigureData>	swtFigures
private SwtMng	swtMng
private GralWidget.ImplAccess	wdggaccess

Constructor Summary

Constructors

Constructor and Description
SwtWdgCanvas(GralWidget.ImplAccess wdggaccess, SwtMng swtMng, GralCanvasStorage canvasStore, Composite parent, int style)

Method Summary

Modifier and Type	Method and Description
private void	drawArc(GC g, GralCanvasStorage.Figure order, GralCanvasStorage.Arcus arc)
void	drawBackground(GC g, int x, int y, int dx, int dy)
private void	drawPolyline(GC g, GralCanvasStorage.Figure order, GralCanvasStorage.PolyLine line)
private void	drawText(GC g, GralCanvasStorage.Figure figure, GralCanvasStorage.FigureText text)
private void	enhanceArea(int xmin, int ymin, int dx, int dy)
private GralPoint	getPixelScaling(GralCanvasStorage.Figure order)
private SwtWdgCanvas.SwtFigureData	getSwtFigureData(java.lang.String name, int size)
private void	prepareArc(GC g, GralCanvasStorage.Figure order, GralCanvasStorage.Arcus arc)
private void	preparePolyline(GC g, GralCanvasStorage.Figure order, GralCanvasStorage.PolyLine line)

Methods inherited from class java.lang.Object

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

Field Detail

canvasStore

private final GralCanvasStorage canvasStore

swtMng

private final SwtMng swtMng

wdggaccess

private final GralWidget.ImplAccess wdggaccess

swtFigures

private java.util.Map<java.lang.String,SwtWdgCanvas.SwtFigureData> swtFigures

figAccess

SwtWdgCanvas.AccessFigure figAccess

paintListener

protected PaintListener paintListener

The listener for paint events. It is called whenever the window is shown newly. It is used as PaintListener in the using SwtAccessGral classes to inform this SWT widget

Constructor Detail

SwtWdgCanvas

SwtWdgCanvas(GralWidget.ImplAccess wdggaccess,
             SwtMng swtMng,
             GralCanvasStorage canvasStore,
             Composite parent,
             int style)

Method Detail

drawBackground

public void drawBackground(GC g,
                           int x,
                           int y,
                           int dx,
                           int dy)

getSwtFigureData

private SwtWdgCanvas.SwtFigureData getSwtFigureData(java.lang.String name,
                                                    int size)

getPixelScaling

private GralPoint getPixelScaling(GralCanvasStorage.Figure order)

enhanceArea

private void enhanceArea(int xmin,
                         int ymin,
                         int dx,
                         int dy)

preparePolyline

private void preparePolyline(GC g,
                             GralCanvasStorage.Figure order,
                             GralCanvasStorage.PolyLine line)

drawPolyline

private void drawPolyline(GC g,
                          GralCanvasStorage.Figure order,
                          GralCanvasStorage.PolyLine line)

prepareArc

private void prepareArc(GC g,
                        GralCanvasStorage.Figure order,
                        GralCanvasStorage.Arcus arc)

drawArc

private void drawArc(GC g,
                     GralCanvasStorage.Figure order,
                     GralCanvasStorage.Arcus arc)

drawText

private void drawText(GC g,
                      GralCanvasStorage.Figure figure,
                      GralCanvasStorage.FigureText text)