用java swt實現的一個2d效果,很漂亮!

代碼如下:

import? java.io.IOException;
import? java.io.InputStream;
import? java.util.HashSet;
import? java.util.Iterator;
import? java.util.MissingResourceException;
import? java.util.Random;
import? java.util.ResourceBundle;
import? java.util.Vector;

import? org.eclipse.swt.SWT;
import? org.eclipse.swt.SWTException;
import? org.eclipse.swt.graphics.Color;
import? org.eclipse.swt.graphics.Font;
import? org.eclipse.swt.graphics.FontData;
import? org.eclipse.swt.graphics.GC;
import? org.eclipse.swt.graphics.Image;
import? org.eclipse.swt.graphics.Path;
import? org.eclipse.swt.graphics.Point;
import? org.eclipse.swt.graphics.RGB;
import? org.eclipse.swt.graphics.Rectangle;
import? org.eclipse.swt.layout.GridData;
import? org.eclipse.swt.layout.GridLayout;
import? org.eclipse.swt.layout.RowLayout;
import? org.eclipse.swt.widgets.Canvas;
import? org.eclipse.swt.widgets.ColorDialog;
import? org.eclipse.swt.widgets.Combo;
import? org.eclipse.swt.widgets.Composite;
import? org.eclipse.swt.widgets.Control;
import? org.eclipse.swt.widgets.Display;
import? org.eclipse.swt.widgets.Event;
import? org.eclipse.swt.widgets.Group;
import? org.eclipse.swt.widgets.Label;
import? org.eclipse.swt.widgets.Listener;
import? org.eclipse.swt.widgets.Menu;
import? org.eclipse.swt.widgets.MenuItem;
import? org.eclipse.swt.widgets.MessageBox;
import? org.eclipse.swt.widgets.Sash;
import? org.eclipse.swt.widgets.Shell;
import? org.eclipse.swt.widgets.Spinner;
import? org.eclipse.swt.widgets.ToolBar;
import? org.eclipse.swt.widgets.ToolItem;
import? org.eclipse.swt.widgets.Tree;
import? org.eclipse.swt.widgets.TreeItem;

public?class? GraphicsExample? {

?? Composite?parent;

?? GraphicsTab []? tabs;

?? GraphicsTab?tab;

?? Object []? tabBackground;

?? boolean? animate;

?? Listener?redrawListener;

?? ToolBar?toolBar;

?? Tree?tabList;

?? Canvas?canvas;

?? Composite?controlPanel,?tabPanel;

?? ToolItem?playItem,?pauseItem,?backItem,?dbItem;

?? Spinner?timerSpinner;

?? Menu?backMenu;

?? MenuItem?customMI;

?? Image?customImage;

?? Color?customColor;

?? Vector?images;

?? static? boolean? advanceGraphics,?advanceGraphicsInit;

?? static?final? int? TIMER?=? 30 ;

?? public? GraphicsExample ( final? Composite?parent )?{
???? this .parent?=?parent;
???? redrawListener?=? new? Listener ()?{
?????? public? void? handleEvent ( Event?e )?{
???????? redraw () ;
?????? }
???? } ;
???? GridData?data;
???? GridLayout?layout?=? new? GridLayout ( 3 ,? false ) ;
???? layout.horizontalSpacing?=? 1 ;
???? parent.setLayout ( layout ) ;
???? tabs?=?createTabs () ;
???? images?=? new? Vector () ;
???? createToolBar ( parent ) ;
???? createTabList ( parent ) ;
???? final? Sash?sash?=? new? Sash ( parent,?SWT.VERTICAL ) ;
???? createTabPanel ( parent ) ;
???? data?=? new? GridData ( SWT.FILL,?SWT.CENTER,?true,? false ) ;
???? data.horizontalSpan?=? 3 ;
???? toolBar.setLayoutData ( data ) ;
???? data?=? new? GridData ( SWT.CENTER,?SWT.FILL,?false,? true ) ;
???? data.widthHint?=?tabList.computeSize ( SWT.DEFAULT,?SWT.DEFAULT ) .x?+? 50 ;
???? tabList.setLayoutData ( data ) ;
???? data?=? new? GridData ( SWT.CENTER,?SWT.FILL,?false,? true ) ;
???? sash.setLayoutData ( data ) ;
???? data?=? new? GridData ( SWT.FILL,?SWT.FILL,?true,? true ) ;
???? tabPanel.setLayoutData ( data ) ;
???? sash.addListener ( SWT.Selection,? new? Listener ()?{
?????? public? void? handleEvent ( Event?event )?{
???????? if? ( event.detail?!=?SWT.DRAG )?{
?????????? GridData?data?=? ( GridData )? tabList.getLayoutData () ;
?????????? data.widthHint?=?event.x
?????????????? -?tabList.computeTrim ( 0 ,? 0 ,? 0 ,? 0 ) .width;
?????????? parent.layout ( true ) ;
?????????? animate?=?pauseItem.getEnabled () ;
???????? }? else? {
?????????? animate?=? false ;
???????? }
?????? }
???? }) ;
???? setTab ( tab ) ;
???? startAnimationTimer () ;
?? }

?? boolean? checkAdvancedGraphics ()?{
???? if? ( advanceGraphicsInit )
?????? return? advanceGraphics;
???? advanceGraphicsInit?=? true ;
???? Display?display?=?Display.getCurrent () ;
???? try? {
?????? Path?path?=? new? Path ( display ) ;
?????? path.dispose () ;
???? }? catch? ( SWTException?e )?{
?????? Shell?shell?=?display.getActiveShell () ,?newShell?=? null ;
?????? if? ( shell?==? null )
???????? shell?=?newShell?=? new? Shell ( display ) ;
?????? MessageBox?dialog?=? new? MessageBox ( shell,?SWT.ICON_WARNING?|?SWT.OK ) ;
?????? dialog.setText ( "Warning" ) ;? //$NON-NLS-1$
?????? dialog.setMessage ( "LibNotFound" ) ;? //$NON-NLS-1$
?????? dialog.open () ;
?????? if? ( newShell?!=? null )
???????? newShell.dispose () ;
?????? return?false ;
???? }
???? return? advanceGraphics?=? true ;
?? }

?? void? createCanvas ( Composite?parent )?{
???? canvas?=? new? Canvas ( parent,?SWT.NO_BACKGROUND ) ;
???? canvas.addListener ( SWT.Paint,? new? Listener ()?{
?????? public? void? handleEvent ( Event?event )?{
???????? GC?gc;
???????? Rectangle?rect?=?canvas.getClientArea () ;
???????? Image?buffer?=? null ;
???????? if? ( dbItem.getSelection ())?{
?????????? buffer?=? new? Image ( canvas.getDisplay () ,?rect ) ;
?????????? gc?=? new? GC ( buffer ) ;
???????? }? else? {
?????????? gc?=?event.gc;
???????? }
???????? paintBackground ( gc,?rect ) ;
???????? GraphicsTab?tab?=?getTab () ;
???????? if? ( tab?!=? null )
?????????? tab.paint ( gc,?rect.width,?rect.height ) ;
???????? if? ( gc?!=?event.gc )
?????????? gc.dispose () ;
???????? if? ( buffer?!=? null )?{
?????????? event.gc.drawImage ( buffer,? 0 ,? 0 ) ;
?????????? buffer.dispose () ;
???????? }
?????? }
???? }) ;
?? }

?? void? createControlPanel ( Composite?parent )?{
???? Group?group;
???? controlPanel?=?group?=? new? Group ( parent,?SWT.NONE ) ;
???? group.setText ( getResourceString ( "Settings" )) ;? //$NON-NLS-1$
???? controlPanel.setLayout ( new? RowLayout ()) ;
?? }

?? void? createTabPanel ( Composite?parent )?{
???? tabPanel?=? new? Composite ( parent,?SWT.NONE ) ;
???? GridData?data;
???? GridLayout?layout?=? new? GridLayout ( 1 ,? false ) ;
???? layout.marginHeight?=?layout.marginWidth?=? 0 ;
???? tabPanel.setLayout ( layout ) ;
???? createCanvas ( tabPanel ) ;
???? createControlPanel ( tabPanel ) ;
???? data?=? new? GridData ( SWT.FILL,?SWT.FILL,?true,? true ) ;
???? canvas.setLayoutData ( data ) ;
???? data?=? new? GridData ( SWT.FILL,?SWT.CENTER,?true,? false ) ;
???? controlPanel.setLayoutData ( data ) ;
?? }

?? void? createToolBar ( final? Composite?parent )?{
???? final? Display?display?=?parent.getDisplay () ;

???? toolBar?=? new? ToolBar ( parent,?SWT.FLAT ) ;
???? Listener?toolBarListener?=? new? Listener ()?{
?????? public? void? handleEvent ( Event?event )?{
???????? switch? ( event.type )?{
???????? case? SWT.Selection:? {
?????????? if? ( event.widget?==?playItem )?{
???????????? animate?=? true ;
???????????? playItem.setEnabled ( !animate ) ;
???????????? pauseItem.setEnabled ( animate ) ;
?????????? }? else?if? ( event.widget?==?pauseItem )?{
???????????? animate?=? false ;
???????????? playItem.setEnabled ( !animate ) ;
???????????? pauseItem.setEnabled ( animate ) ;
?????????? }? else?if? ( event.widget?==?backItem )?{
???????????? final? ToolItem?toolItem?=? ( ToolItem )? event.widget;
???????????? final? ToolBar?toolBar?=?toolItem.getParent () ;
???????????? Rectangle?toolItemBounds?=?toolItem.getBounds () ;
???????????? Point?point?=?toolBar.toDisplay ( new? Point (
???????????????? toolItemBounds.x,?toolItemBounds.y )) ;
???????????? backMenu.setLocation ( point.x,?point.y
???????????????? +?toolItemBounds.height ) ;
???????????? backMenu.setVisible ( true ) ;
?????????? }
???????? }
?????????? break ;
???????? }
?????? }
???? } ;

???? playItem?=? new? ToolItem ( toolBar,?SWT.PUSH ) ;
???? playItem.setText ( getResourceString ( "Play" )) ;? //$NON-NLS-1$
???? playItem.setImage ( loadImage ( display,? "play.gif" )) ;? //$NON-NLS-1$
???? playItem.addListener ( SWT.Selection,?toolBarListener ) ;

???? pauseItem?=? new? ToolItem ( toolBar,?SWT.PUSH ) ;
???? pauseItem.setText ( getResourceString ( "Pause" )) ;? //$NON-NLS-1$
???? pauseItem.setImage ( loadImage ( display,? "pause.gif" )) ;? //$NON-NLS-1$
???? pauseItem.addListener ( SWT.Selection,?toolBarListener ) ;

???? backItem?=? new? ToolItem ( toolBar,?SWT.PUSH ) ;
???? backItem.setText ( getResourceString ( "Background" )) ;? //$NON-NLS-1$
???? backItem.addListener ( SWT.Selection,?toolBarListener ) ;
???? String []? names?=? new? String []?{? getResourceString ( "White" ) ,? //$NON-NLS-1$
???????? getResourceString ( "Black" ) ,? //$NON-NLS-1$
???????? getResourceString ( "Red" ) ,? //$NON-NLS-1$
???????? getResourceString ( "Green" ) ,? //$NON-NLS-1$
???????? getResourceString ( "Blue" ) ,? //$NON-NLS-1$
???????? getResourceString ( "CustomColor" ) ,? //$NON-NLS-1$
???? } ;
???? Color []? colors?=? new? Color []?{? display.getSystemColor ( SWT.COLOR_WHITE ) ,
???????? display.getSystemColor ( SWT.COLOR_BLACK ) ,
???????? display.getSystemColor ( SWT.COLOR_RED ) ,
???????? display.getSystemColor ( SWT.COLOR_GREEN ) ,
???????? display.getSystemColor ( SWT.COLOR_BLUE ) ,?null,? } ;
???? backMenu?=? new? Menu ( parent ) ;
???? Listener?listener?=? new? Listener ()?{
?????? public? void? handleEvent ( Event?event )?{
???????? MenuItem?item?=? ( MenuItem )? event.widget;
???????? if? ( customMI?==?item )?{
?????????? ColorDialog?dialog?=? new? ColorDialog ( parent.getShell ()) ;
?????????? RGB?rgb?=?dialog.open () ;
?????????? if? ( rgb?==? null )
???????????? return ;
?????????? if? ( customColor?!=? null )
???????????? customColor.dispose () ;
?????????? customColor?=? new? Color ( display,?rgb ) ;
?????????? if? ( customImage?!=? null )
???????????? customImage.dispose () ;
?????????? customImage?=?createImage ( display,?customColor ) ;
?????????? item.setData ( new? Object []?{? customColor,?customImage? }) ;
?????????? item.setImage ( customImage ) ;
???????? }
???????? tabBackground?=? ( Object [])? item.getData () ;
???????? backItem.setImage (( Image )? tabBackground [ 1 ]) ;
???????? canvas.redraw () ;
?????? }
???? } ;
???? for? ( int? i?=? 0 ;?i?<?names.length;?i++ )?{
?????? MenuItem?item?=? new? MenuItem ( backMenu,?SWT.NONE ) ;
?????? item.setText ( names [ i ]) ;
?????? item.addListener ( SWT.Selection,?listener ) ;
?????? Image?image?=? null ;
?????? if? ( colors [ i ]? !=? null )?{
???????? image?=?createImage ( display,?colors [ i ]) ;
???????? images.addElement ( image ) ;
???????? item.setImage ( image ) ;
?????? }? else? {
???????? //?custom?menu?item
???????? customMI?=?item;
?????? }
?????? item.setData ( new? Object []?{? colors [ i ] ,?image? }) ;
?????? if? ( tabBackground?==? null )?{
???????? tabBackground?=? ( Object [])? item.getData () ;
???????? backItem.setImage (( Image )? tabBackground [ 1 ]) ;
?????? }
???? }

???? dbItem?=? new? ToolItem ( toolBar,?SWT.CHECK ) ;
???? dbItem.setText ( getResourceString ( "DoubleBuffer" )) ;? //$NON-NLS-1$
???? dbItem.setImage ( loadImage ( display,? "db.gif" )) ;? //$NON-NLS-1$

???? ToolItem?separator?=? new? ToolItem ( toolBar,?SWT.SEPARATOR ) ;
???? Composite?comp?=? new? Composite ( toolBar,?SWT.NONE ) ;
???? GridData?data;
???? GridLayout?layout?=? new? GridLayout ( 1 ,? false ) ;
???? layout.verticalSpacing?=? 0 ;
???? layout.marginWidth?=?layout.marginHeight?=? 3 ;
???? comp.setLayout ( layout ) ;
???? timerSpinner?=? new? Spinner ( comp,?SWT.BORDER?|?SWT.WRAP ) ;
???? data?=? new? GridData ( SWT.CENTER,?SWT.CENTER,?false,? false ) ;
???? timerSpinner.setLayoutData ( data ) ;
???? Label?label?=? new? Label ( comp,?SWT.NONE ) ;
???? label.setText ( getResourceString ( "Animation" )) ;? //$NON-NLS-1$
???? data?=? new? GridData ( SWT.CENTER,?SWT.CENTER,?false,? false ) ;
???? label.setLayoutData ( data ) ;
???? timerSpinner.setMaximum ( 1000 ) ;
???? timerSpinner.setSelection ( TIMER ) ;
???? timerSpinner.setSelection ( TIMER ) ;
???? separator.setControl ( comp ) ;
???? separator.setWidth ( comp.computeSize ( SWT.DEFAULT,?SWT.DEFAULT ) .x ) ;
?? }

?? Image?createImage ( Display?display,?Color?color )?{
???? Image?image?=? new? Image ( display,? 16 ,? 16 ) ;
???? GC?gc?=? new? GC ( image ) ;
???? gc.setBackground ( color ) ;
???? Rectangle?rect?=?image.getBounds () ;
???? gc.fillRectangle ( rect ) ;
???? if? ( color.equals ( display.getSystemColor ( SWT.COLOR_BLACK )))?{
?????? gc.setForeground ( display.getSystemColor ( SWT.COLOR_WHITE )) ;
???? }
???? gc.drawRectangle ( rect.x,?rect.y,?rect.width?-? 1 ,?rect.height?-? 1 ) ;
???? gc.dispose () ;
???? return? image;
?? }

?? void? createTabList ( Composite?parent )?{
???? tabList?=? new? Tree ( parent,?SWT.SINGLE?|?SWT.H_SCROLL?|?SWT.V_SCROLL
???????? |?SWT.BORDER ) ;
???? HashSet?set?=? new? HashSet () ;
???? for? ( int? i?=? 0 ;?i?<?tabs.length;?i++ )?{
?????? GraphicsTab?tab?=?tabs [ i ] ;
?????? set.add ( tab.getCategory ()) ;
???? }
???? for? ( Iterator?iter?=?set.iterator () ;?iter.hasNext () ; )?{
?????? String?text?=? ( String )? iter.next () ;
?????? TreeItem?item?=? new? TreeItem ( tabList,?SWT.NONE ) ;
?????? item.setText ( text ) ;
???? }
???? TreeItem []? items?=?tabList.getItems () ;
???? for? ( int? i?=? 0 ;?i?<?items.length;?i++ )?{
?????? TreeItem?item?=?items [ i ] ;
?????? for? ( int? j?=? 0 ;?j?<?tabs.length;?j++ )?{
???????? GraphicsTab?tab?=?tabs [ j ] ;
???????? if? ( item.getText () .equals ( tab.getCategory ()))?{
?????????? TreeItem?item1?=? new? TreeItem ( item,?SWT.NONE ) ;
?????????? item1.setText ( tab.getText ()) ;
?????????? item1.setData ( tab ) ;
???????? }
?????? }
???? }
???? tabList.addListener ( SWT.Selection,? new? Listener ()?{
?????? public? void? handleEvent ( Event?event )?{
???????? TreeItem?item?=? ( TreeItem )? event.item;
???????? if? ( item?!=? null )?{
?????????? setTab (( GraphicsTab )? item.getData ()) ;
???????? }
?????? }
???? }) ;
?? }

?? GraphicsTab []? createTabs ()?{
???? return?new? GraphicsTab []?{? new? LineTab ( this ) ,? new? StarPolyTab ( this ) ,
???????? tab?=? new? IntroTab ( this ) ,? new? BlackHoleTab ( this ) ,? } ;
?? }

?? /**
??? *?Disposes?all?resources?created?by?the?receiver.
??? */
?? public? void? dispose ()?{
???? if? ( tabs?!=? null )?{
?????? for? ( int? i?=? 0 ;?i?<?tabs.length;?i++ )?{
???????? GraphicsTab?tab?=?tabs [ i ] ;
???????? tab.dispose () ;
?????? }
???? }
???? tabs?=? null ;
???? if? ( images?!=? null )?{
?????? for? ( int? i?=? 0 ;?i?<?images.size () ;?i++ )?{
???????? (( Image )? images.elementAt ( i )) .dispose () ;
?????? }
???? }
???? images?=? null ;
???? if? ( customColor?!=? null )
?????? customColor.dispose () ;
???? customColor?=? null ;
???? if? ( customImage?!=? null )
?????? customImage.dispose () ;
???? customImage?=? null ;
?? }

?? TreeItem?findItemByData ( TreeItem []? items,?Object?data )?{
???? for? ( int? i?=? 0 ;?i?<?items.length;?i++ )?{
?????? TreeItem?item?=?items [ i ] ;
?????? if? ( item.getData ()? ==?data )
???????? return? item;
?????? item?=?findItemByData ( item.getItems () ,?data ) ;
?????? if? ( item?!=? null )
???????? return? item;
???? }
???? return?null ;
?? }

?? /**
??? *?Gets?the?current?tab.
??? */
?? public? GraphicsTab?getTab ()?{
???? return? tab;
?? }

?? Listener?getRedrawListener ()?{
???? return? redrawListener;
?? }

?? /**
??? *?Gets?a?string?from?the?resource?bundle.?We?don't?want?to?crash?because?of
??? *?a?missing?String.?Returns?the?key?if?not?found.
??? */
?? static? String?getResourceString ( String?key )?{
?????? return? "key" ;
?? }

?? static? Image?loadImage ( Display?display,?Class?clazz,?String?string )?{
???? InputStream?stream?=?clazz.getResourceAsStream ( string ) ;
???? if? ( stream?==? null )
?????? return?null ;
???? Image?image?=? null ;
???? try? {
?????? image?=? new? Image ( display,?stream ) ;
???? }? catch? ( SWTException?ex )?{
???? }? finally? {
?????? try? {
???????? stream.close () ;
?????? }? catch? ( IOException?ex )?{
?????? }
???? }
???? return? image;
?? }

?? Image?loadImage ( Display?display,?String?name )?{
???? Image?image?=?loadImage ( display,?GraphicsExample.class,?name ) ;
???? if? ( image?!=? null )
?????? images.addElement ( image ) ;
???? return? image;
?? }

?? void? paintBackground ( GC?gc,?Rectangle?rect )?{
???? gc.setBackground (( Color )? tabBackground [ 0 ]) ;
???? gc.fillRectangle ( rect ) ;
?? }

?? /**
??? *?Redraws?the?current?tab.
??? */
?? public? void? redraw ()?{
???? canvas.redraw () ;
?? }

?? /**
??? *?Grabs?input?focus.
??? */
?? public? void? setFocus ()?{
???? tabList.setFocus () ;
?? }

?? /**
??? *?Sets?the?current?tab.
??? */
?? public? void? setTab ( GraphicsTab?tab )?{
???? this .tab?=?tab;
???? Control []? children?=?controlPanel.getChildren () ;
???? for? ( int? i?=? 0 ;?i?<?children.length;?i++ )?{
?????? Control?control?=?children [ i ] ;
?????? control.dispose () ;
???? }
???? if? ( tab?!=? null )?{
?????? tab.createControlPanel ( controlPanel ) ;
?????? animate?=?tab.isAnimated () ;
???? }
???? playItem.setEnabled ( !animate ) ;
???? pauseItem.setEnabled ( animate ) ;
???? GridData?data?=? ( GridData )? controlPanel.getLayoutData () ;
???? children?=?controlPanel.getChildren () ;
???? data.exclude?=?children.length?==? 0 ;
???? controlPanel.setVisible ( !data.exclude ) ;
???? if? ( data.exclude )?{
?????? tabPanel.layout () ;
???? }? else? {
?????? tabPanel.layout ( children ) ;
???? }
???? if? ( tab?!=? null )?{
?????? TreeItem []? selection?=?tabList.getSelection () ;
?????? if? ( selection.length?==? 0? ||?selection [ 0 ] .getData ()? !=?tab )?{
???????? TreeItem?item?=?findItemByData ( tabList.getItems () ,?tab ) ;
???????? if? ( item?!=? null )
?????????? tabList.setSelection ( new? TreeItem []?{? item? }) ;
?????? }
???? }
???? canvas.redraw () ;
?? }

?? void? startAnimationTimer ()?{
???? final? Display?display?=?Display.getCurrent () ;
???? display.timerExec ( timerSpinner.getSelection () ,? new? Runnable ()?{
?????? public? void? run ()?{
???????? if? ( canvas.isDisposed ())
?????????? return ;
???????? if? ( animate )?{
?????????? GraphicsTab?tab?=?getTab () ;
?????????? if? ( tab?!=? null? &&?tab.isAnimated ())?{
???????????? Rectangle?rect?=?canvas.getClientArea () ;
???????????? tab.next ( rect.width,?rect.height ) ;
???????????? canvas.redraw () ;
???????????? canvas.update () ;
?????????? }
???????? }
???????? display.timerExec ( timerSpinner.getSelection () ,? this ) ;
?????? }
???? }) ;
?? }

?? public?static? void? main ( String []? args )?{
???? Display?display?=? new? Display () ;
???? Shell?shell?=? new? Shell ( display ) ;
???? shell.setText ( getResourceString ( "SWTGraphics" )) ;? //$NON-NLS-1$
???? final? GraphicsExample?example?=? new? GraphicsExample ( shell ) ;
???? shell.addListener ( SWT.Close,? new? Listener ()?{
?????? public? void? handleEvent ( Event?event )?{
???????? example.dispose () ;
?????? }
???? }) ;
???? shell.open () ;
???? while? ( !shell.isDisposed ())?{
?????? if? ( !display.readAndDispatch ())
???????? display.sleep () ;
???? }
?? }
}

/*******************************************************************************
? *?Copyright?(c)?2000,?2005?IBM?Corporation?and?others.?All?rights?reserved.
? *?This?program?and?the?accompanying?materials?are?made?available?under?the
? *?terms?of?the?Eclipse?Public?License?v1.0?which?accompanies?this?distribution,
? *?and?is?available?at?http://www.eclipse.org/legal/epl-v10.html
? *?
? *?Contributors:?IBM?Corporation?-?initial?API?and?implementation
? ******************************************************************************/
abstract?class? GraphicsTab? {

?? GraphicsExample?example;

?? public? GraphicsTab ( GraphicsExample?example )?{
???? this .example?=?example;
?? }

?? /**
??? *?Creates?the?widgets?used?to?control?the?drawing.
??? */
?? public? void? createControlPanel ( Composite?parent )?{
?? }

?? /**
??? *?Disposes?resources?created?by?the?receiver.
??? */
?? public? void? dispose ()?{
?? }

?? /**
??? *?Answer?the?receiver's?name.
??? */
?? public?abstract? String?getText () ;

?? /**
??? *?Answer?the?receiver's?category.
??? */
?? public? String?getCategory ()?{
???? return? GraphicsExample.getResourceString ( "Misc" ) ;? //$NON-NLS-1$
?? }

?? /**
??? *?Answer?whether?the?receiver?is?animated?or?not.
??? */
?? public? boolean? isAnimated ()?{
???? return?false ;
?? }

?? /**
??? *?Advance?the?animation.
??? */
?? public? void? next ( int? width,? int? height )?{
?? }

?? /**
??? *?Paint?the?receiver?into?the?specified?GC.
??? */
?? public? void? paint ( GC?gc,? int? width,? int? height )?{
?? }

}

/*******************************************************************************
? *?Copyright?(c)?2000,?2005?IBM?Corporation?and?others.?All?rights?reserved.
? *?This?program?and?the?accompanying?materials?are?made?available?under?the
? *?terms?of?the?Eclipse?Public?License?v1.0?which?accompanies?this?distribution,
? *?and?is?available?at?http://www.eclipse.org/legal/epl-v10.html
? *?
? *?Contributors:?IBM?Corporation?-?initial?API?and?implementation
? ******************************************************************************/
class? LineTab? extends? GraphicsTab? {

?? public? LineTab ( GraphicsExample?example )?{
???? super ( example ) ;
?? }

?? public? String?getText ()?{
???? return? GraphicsExample.getResourceString ( "Line" ) ;? //$NON-NLS-1$
?? }

?? public? void? paint ( GC?gc,? int? width,? int? height )?{
???? gc.drawLine ( 0 ,? 0 ,?width,?height ) ;
???? gc.drawLine ( width,? 0 ,? 0 ,?height ) ;
?? }
}

/*******************************************************************************
? *?Copyright?(c)?2000,?2005?IBM?Corporation?and?others.?All?rights?reserved.
? *?This?program?and?the?accompanying?materials?are?made?available?under?the
? *?terms?of?the?Eclipse?Public?License?v1.0?which?accompanies?this?distribution,
? *?and?is?available?at?http://www.eclipse.org/legal/epl-v10.html
? *?
? *?Contributors:?IBM?Corporation?-?initial?API?and?implementation
? ******************************************************************************/
class? StarPolyTab? extends? GraphicsTab? {
?? int []? radial;

?? static?final? int? POINTS?=? 11 ;

?? Combo?fillRuleCb;

?? public? StarPolyTab ( GraphicsExample?example )?{
???? super ( example ) ;
???? radial?=? new? int [ POINTS?*? 2 ] ;
?? }

?? public? void? createControlPanel ( Composite?parent )?{
???? new? Label ( parent,?SWT.NONE ) .setText ( GraphicsExample
???????? .getResourceString ( "FillRule" )) ;? //$NON-NLS-1$
???? fillRuleCb?=? new? Combo ( parent,?SWT.DROP_DOWN ) ;
???? fillRuleCb.add ( "FILL_EVEN_ODD" ) ;
???? fillRuleCb.add ( "FILL_WINDING" ) ;
???? fillRuleCb.select ( 0 ) ;
???? fillRuleCb.addListener ( SWT.Selection,?example.getRedrawListener ()) ;
?? }

?? public? String?getCategory ()?{
???? return? GraphicsExample.getResourceString ( "Polygons" ) ;? //$NON-NLS-1$
?? }

?? public? String?getText ()?{
???? return? GraphicsExample.getResourceString ( "StarPolygon" ) ;? //$NON-NLS-1$
?? }

?? public? void? paint ( GC?gc,? int? width,? int? height )?{
???? int? centerX?=?width?/? 2 ;
???? int? centerY?=?height?/? 2 ;
???? int? pos?=? 0 ;
???? for? ( int? i?=? 0 ;?i?<?POINTS;?++i )?{
?????? double? r?=?Math.PI?*? 2? *?pos?/?POINTS;
?????? radial [ i?*? 2 ]? =? ( int )?(( 1? +?Math.cos ( r ))? *?centerX ) ;
?????? radial [ i?*? 2? +? 1 ]? =? ( int )?(( 1? +?Math.sin ( r ))? *?centerY ) ;
?????? pos?=? ( pos?+?POINTS?/? 2 )? %?POINTS;
???? }
???? Display?display?=?Display.getCurrent () ;
???? gc.setFillRule ( fillRuleCb.getSelectionIndex ()? !=? 0? ??SWT.FILL_WINDING
???????? :?SWT.FILL_EVEN_ODD ) ;
???? gc.setBackground ( display.getSystemColor ( SWT.COLOR_WHITE )) ;
???? gc.fillPolygon ( radial ) ;
???? gc.drawPolygon ( radial ) ;
?? }
}

/*******************************************************************************
? *?Copyright?(c)?2000,?2005?IBM?Corporation?and?others.?All?rights?reserved.
? *?This?program?and?the?accompanying?materials?are?made?available?under?the
? *?terms?of?the?Eclipse?Public?License?v1.0?which?accompanies?this?distribution,
? *?and?is?available?at?http://www.eclipse.org/legal/epl-v10.html
? *?
? *?Contributors:?IBM?Corporation?-?initial?API?and?implementation
? ******************************************************************************/
class? BlackHoleTab? extends? GraphicsTab? {

?? int? size?=? 1 ;

?? public? BlackHoleTab ( GraphicsExample?example )?{
???? super ( example ) ;
?? }

?? public? String?getText ()?{
???? return? GraphicsExample.getResourceString ( "BlackHole" ) ;? //$NON-NLS-1$
?? }

?? public? boolean? isAnimated ()?{
???? return?true ;
?? }

?? public? void? next ( int? width,? int? height )?{
???? if? ( size?>?width?*? 3? /? 2 )
?????? size?=? 0 ;
???? else
?????? size?+=? 10 ;
?? }

?? public? void? paint ( GC?gc,? int? width,? int? height )?{
???? Display?display?=?Display.getCurrent () ;
???? gc.setBackground ( display.getSystemColor ( SWT.COLOR_BLACK )) ;
???? gc.fillOval (( width?-?size )? /? 2 ,? ( height?-?size )? /? 2 ,?size,?size ) ;
?? }
}

/*******************************************************************************
? *?Copyright?(c)?2000,?2005?IBM?Corporation?and?others.?All?rights?reserved.
? *?This?program?and?the?accompanying?materials?are?made?available?under?the
? *?terms?of?the?Eclipse?Public?License?v1.0?which?accompanies?this?distribution,
? *?and?is?available?at?http://www.eclipse.org/legal/epl-v10.html
? *?
? *?Contributors:?IBM?Corporation?-?initial?API?and?implementation
? ******************************************************************************/
class? IntroTab? extends? GraphicsTab? {

?? Font?font;

?? Image?image;

?? Random?random?=? new? Random () ;

?? float? x,?y;

?? float? incX?=? 10.0f ;

?? float? incY?=? 5.0f ;

?? int? textWidth,?textHeight;

?? String?text?=? "SWT" ;

?? public? IntroTab ( GraphicsExample?example )?{
???? super ( example ) ;
?? }

?? public? void? dispose ()?{
???? if? ( image?!=? null )
?????? image.dispose () ;
???? image?=? null ;
???? if? ( font?!=? null )
?????? font.dispose () ;
???? font?=? null ;
?? }

?? public? String?getCategory ()?{
???? return? GraphicsExample.getResourceString ( "Introduction" ) ;? //$NON-NLS-1$
?? }

?? public? String?getText ()?{
???? return? GraphicsExample.getResourceString ( "SWT" ) ;? //$NON-NLS-1$
?? }

?? public? boolean? isAnimated ()?{
???? return?true ;
?? }

?? public? void? next ( int? width,? int? height )?{
???? x?+=?incX;
???? y?+=?incY;
???? float? random?=? ( float )? Math.random () ;
???? if? ( x?+?textWidth?>?width )?{
?????? x?=?width?-?textWidth;
?????? incX?=?random?*?-width?/? 16? -? 1 ;
???? }
???? if? ( x?<? 0 )?{
?????? x?=? 0 ;
?????? incX?=?random?*?width?/? 16? +? 1 ;
???? }
???? if? ( y?+?textHeight?>?height )?{
?????? y?=? ( height?-?textHeight )? -? 2 ;
?????? incY?=?random?*?-height?/? 16? -? 1 ;
???? }
???? if? ( y?<? 0 )?{
?????? y?=? 0 ;
?????? incY?=?random?*?height?/? 16? +? 1 ;
???? }
?? }

?? public? void? paint ( GC?gc,? int? width,? int? height )?{
???? if? ( !example.checkAdvancedGraphics ())
?????? return ;
???? Display?display?=?Display.getCurrent () ;
???? if? ( image?==? null )?{
?????? image?=?example.loadImage ( Display.getCurrent () ,? "irmaos.jpg" ) ;
?????? Rectangle?rect?=?image.getBounds () ;
?????? FontData?fd?=?display.getSystemFont () .getFontData ()[ 0 ] ;
?????? font?=? new? Font ( display,?fd.getName () ,?rect.height?/? 4 ,?SWT.BOLD ) ;
?????? gc.setFont ( font ) ;
?????? Point?size?=?gc.stringExtent ( text ) ;
?????? textWidth?=?size.x;
?????? textHeight?=?size.y;
???? }
???? Path?path?=? new? Path ( display ) ;
???? path.addString ( text,?x,?y,?font ) ;
???? gc.setClipping ( path ) ;
???? Rectangle?rect?=?image.getBounds () ;
???? gc.drawImage ( image,? 0 ,? 0 ,?rect.width,?rect.height,? 0 ,? 0 ,?width,?height ) ;
???? gc.setClipping (( Rectangle )? null ) ;
???? gc.setForeground ( display.getSystemColor ( SWT.COLOR_BLUE )) ;
???? gc.drawPath ( path ) ;
?? }
}