main.java

来自「java画图软件 具有绘制图形」· Java 代码 · 共 942 行 · 第 1/2 页

out.writeObject(g); 
} 

private void read(ObjectInputStream in) throws IOException,ClassNotFoundException 
{ 
int l=in.readInt(); 
int r=in.readInt(); 
int e=in.readInt(); 

for(int k=0;k<l;k++) 
{ 
try 
{ 
LineShape g=(LineShape) in.readObject(); 
SimplePanel.line.add(g); 
} 
catch(IOException m) {} 
} 

for(int k=0;k<r;k++) 
{ 
try 
{ 
RectShape g=(RectShape) in.readObject(); 
SimplePanel.rect.add(g); 
} 
catch(IOException m) {} 
catch(ClassNotFoundException n) {} 
} 

for(int k=0;k<e;k++) 
{ 
try 
{ 
ElliShape g=(ElliShape) in.readObject(); 
SimplePanel.elli.add(g); 
} 
catch(IOException m) {} 
} 
} 
} 

/////////////////////////////////////////////////////////////////////////////////// 
//file filter class 
class ExtensionFileFilter extends FileFilter 
{ 
private String description = ""; 
private ArrayList<String> extensions = new ArrayList<String>(); 

public void addExtension(String extension) 
{ 
if (!extension.startsWith(".")) 
extension = "." + extension; 
extensions.add(extension.toLowerCase()); 
} 

public void setDescription(String aDescription) 
{ 
description = aDescription; 
} 

public String getDescription() 
{ 
return description; 
} 

public boolean accept(File f) 
{ 
if (f.isDirectory()) return true; 
String name = f.getName().toLowerCase(); 

for (String extension : extensions) 
if (name.endsWith(extension)) 
return true; 
return false; 
} 
} 
/////////////////////////////////////////////////////////////////////////////////// 
//------------------------------------------------------------------------------- 
//panel class 
class SimplePanel extends JPanel 
{ 
public static ArrayList<LineShape> line; 
public static ArrayList<RectShape> rect; 
public static ArrayList<ElliShape> elli; 

private Point2D begin=null; 
private Point2D end=null; 

private static int vernier=0; 
private static int[] a=new int[100]; 

public SimplePanel() 
{ 
line=new ArrayList<LineShape>(); 
rect=new ArrayList<RectShape>(); 
elli=new ArrayList<ElliShape>(); 

for(int m=0;m<100;m++) 
a[m]=0; 

addMouseListener(new MouseAction()); 
addMouseMotionListener(new MouseMotionAction()); 
} 

public void paintComponent(Graphics g) 
{ 
super.paintComponent(g); 
Graphics2D g2=(Graphics2D) g; 

for(LineShape l:line) 
{ 
g2.setPaint(l.getColor()); 
g2.draw(l.getLine()); 
} 


for(RectShape r:rect) 
{ 
g2.setPaint(r.getColor()); 
g2.draw(r.getRect()); 
} 


for(ElliShape e:elli) 
{ 
g2.setPaint(e.getColor()); 
g2.draw(e.getElli()); 
} 

} 

public void addLine(Point2D p1,Point2D p2) 
{ 
if(p1!=null && p2!=null) 
{ 
Line2D l=new Line2D.Double(p1,p2); 

LineShape lineShape=new LineShape(l,SimpleFrame.getColorFlag()); 

line.add(lineShape); 

if(vernier==99) 
{ 
a[vernier]=SimpleFrame.getFlag(); 
vernier=0; 
} 
else 
{ 
a[vernier]=SimpleFrame.getFlag(); 
vernier++; 
} 

repaint(); 
} 

begin=null; 
end=null; 
} 

public void addRect(Point2D p1,Point2D p2) 
{ 
if(p1!=null && p2!=null) 
{ 
double leftX=p1.getX(); 
double leftY=p1.getY(); 
double width=p2.getX()-p1.getX(); 
double height=p2.getY()-p1.getY(); 

Rectangle2D l=new Rectangle2D.Double(); 

if(p2.getX()>p1.getX() && p2.getY()>p1.getY()) 
{ 
l=new Rectangle2D.Double(leftX,leftY,width,height); 
} 

if(p2.getX()<p1.getX() && p2.getY()<p1.getY()) 
{ 
l=new Rectangle2D.Double(p2.getX(),p2.getY(),-width,-height); 
} 

if(p2.getX()>p1.getX() && p2.getY()<p1.getY()) 
{ 
l=new Rectangle2D.Double(p1.getX(),p2.getY(),width,-height); 
} 

if(p2.getX()<p1.getX() && p2.getY()>p1.getY()) 
{ 
l=new Rectangle2D.Double(p2.getX(),p1.getY(),-width,height); 
} 

RectShape rectShape=new RectShape(l,SimpleFrame.getColorFlag()); 

rect.add(rectShape); 

if(vernier==99) 
{ 
a[vernier]=SimpleFrame.getFlag(); 
vernier=0; 
} 
else 
{ 
a[vernier]=SimpleFrame.getFlag(); 
vernier++; 
} 

repaint(); 
} 

begin=null; 
end=null; 
} 

public void addElli(Point2D p1,Point2D p2) 
{ 
if(p1!=null && p2!=null) 
{ 
Point2D center=new Point2D.Double((p2.getX()+p1.getX())/2,(p2.getY()+p1.getY())/2); 

Ellipse2D e=new Ellipse2D.Double(); 
e.setFrameFromCenter(center,p1); 

ElliShape elliShape=new ElliShape(e,SimpleFrame.getColorFlag()); 

elli.add(elliShape); 

if(vernier==99) 
{ 
a[vernier]=SimpleFrame.getFlag(); 
vernier=0; 
} 
else 
{ 
a[vernier]=SimpleFrame.getFlag(); 
vernier++; 
} 

repaint(); 
} 


begin=null; 
end=null; 
} 

public static void clean() 
{ 
for(int i=0;i<100;i++) 
a[i]=0; 

vernier=0; 

line.clear(); 
rect.clear(); 
elli.clear(); 
} 

public static void removeLast() 
{ 
int i; 

if(vernier==0) 
vernier=99; 
else 
vernier--; 

if(a[vernier]==0) 
{ 
if(vernier==99) 
vernier=0; 
else 
vernier++; 

return; 
} 
else 
{ 
if(a[vernier]==1) 
{ 
i=line.size(); 
line.remove(i-1); 
a[vernier]=0; 

} 

if(a[vernier]==2) 
{ 
i=rect.size(); 
rect.remove(i-1); 
a[vernier]=0; 

} 

if(a[vernier]==3) 
{ 
i=elli.size(); 
elli.remove(i-1); 
a[vernier]=0; 

} 
} 
} 

private class MouseAction extends MouseAdapter 
{ 
public void mousePressed(MouseEvent event) 
{ 

begin=event.getPoint(); 

} 

public void mouseReleased(MouseEvent event) 
{ 
end=event.getPoint(); 

if(SimpleFrame.getFlag()==1) addLine(begin,end); 
if(SimpleFrame.getFlag()==2) addRect(begin,end); 
if(SimpleFrame.getFlag()==3) addElli(begin,end); 

} 

public void mouseClicked(MouseEvent event) 
{ 
int i; 

if(SimpleFrame.getFlag()==1) {i=line.size();line.remove(i-1);repaint();} 
if(SimpleFrame.getFlag()==2) {i=rect.size();rect.remove(i-1);repaint();} 
if(SimpleFrame.getFlag()==3) {i=elli.size();elli.remove(i-1);repaint();} 

} 
} 

private class MouseMotionAction implements MouseMotionListener 
{ 
public void mouseMoved(MouseEvent event) 
{ 

setCursor(Cursor.getDefaultCursor()); 
} 

public void mouseDragged(MouseEvent event) 
{ 
setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR)); 
} 
} 

public static int getLineSize() 
{ 
return line.size(); 
} 

public static int getRectSize() 
{ 
return rect.size(); 
} 

public static int getElliSize() 
{ 
return elli.size(); 
} 

} 

//-------------------------------------------------------------------------------- 
//new class,in order to keep the shape of color 
class LineShape implements Serializable 
{ 
private Line2D line; 
private Color c; 

public LineShape() 
{ 
line=null; 
c=Color.BLACK; 
} 

public LineShape(Line2D line,Color c) 
{ 
this.line=line; 
this.c=c; 
} 

public Line2D getLine() {return line;} 
public Color getColor() {return c;} 
public void setLine(Line2D line) {this.line=line;} 
public void setColor(Color c) {this.c=c;} 
} 

class RectShape implements Serializable 
{ 
private Rectangle2D rect; 
private Color c; 

public RectShape() 
{ 
rect=null; 
c=Color.BLACK; 
} 

public RectShape(Rectangle2D rect,Color c) 
{ 
this.rect=rect; 
this.c=c; 
} 

public Rectangle2D getRect() {return rect;} 
public Color getColor() {return c;} 
public void setRect(Rectangle2D rect) {this.rect=rect;} 
public void setColor(Color c) {this.c=c;} 
} 

class ElliShape implements Serializable 
{ 
private Ellipse2D elli; 
private Color c; 

public ElliShape() 
{ 
elli=null; 
c=Color.BLACK; 
} 

public ElliShape(Ellipse2D elli,Color c) 
{ 
this.elli=elli; 
this.c=c; 
} 

public Ellipse2D getElli() {return elli;} 
public Color getColor() {return c;} 
public void setElli(Ellipse2D elli) {this.elli=elli;} 
public void setColor(Color c) {this.c=c;} 
} 

//---------------------------------------------- 
// AboutDialog class 
class AboutDialog extends JDialog 
{ 
public AboutDialog(JFrame owner) 
{ 
super(owner,"About Dialog",true); 

add(new JLabel("                  06070204 张涛"),BorderLayout.CENTER); 

JButton okButton=new JButton("ok"); 

okButton.addActionListener(new 
ActionListener() 
{ 
public void actionPerformed(ActionEvent event) 
{ 
setVisible(false); 
} 
}); 

JPanel dialogPanel=new JPanel(); 
dialogPanel.add(okButton); 

add(dialogPanel,BorderLayout.SOUTH); 

setSize(200,100); 

Toolkit kit=Toolkit.getDefaultToolkit(); 
Dimension screenSize=kit.getScreenSize(); 
int height=screenSize.height; 
int width=screenSize.width; 
setLocation(width/5*2,height/2); 
} 
}