circle.java

JavaMapper是一个免费的Java应用程序

import java.awt.*;

public class Circle extends Rect {

private int origCX,origCY,nodeResize;

public Circle(int x, int y) {
	super(x,y);
}

public void draw(Graphics s) {
	s.setColor(Color.blue);
	if (isHighlighted() || isSelected()) {
		s.setColor(Color.red);
		// draw highlight lines
		storeDimensions();
		int r = w/2;
		int a = (int)(r/Math.sqrt(2));
		for (int i=0;i<2*a;i+=3) {
			int X = origCX-a+i;
			int Y = origCY-a+i;
			int testY = (int)(r-Math.sqrt(2*Math.pow(i,2)));
			int testA = (int)(Math.sqrt(Math.pow(r,2)-Math.pow(testY,2))/Math.sqrt(2));
			s.drawLine(X+testA,Y-testA,X-testA,Y+testA);
		}
	}
	if (isSelected()) {
		// draw resize blocks
		s.fillRect(x+w/2-3,y,7,7);  // n
		s.fillRect(x+w/2-3,y+h-6,7,7);  // s
		s.fillRect(x,y+h/2-3,7,7);  // w
		s.fillRect(x+w-6,y+h/2-3,7,7);  // e
	}
	s.drawOval(x,y,w,h);
}

public void newPoint(int x, int y) {
	x2 = x;
	y2 = y;
	this.h = this.w = Math.max(Math.abs(x1-x2),Math.abs(y1-y2));
	if (x2>x1) this.x = x1;
	else this.x = x1-this.w;
	
	if (y2>y1) this.y = y1;
	else this.y = y1-this.h;
}

public boolean contains(int x, int y) {
	if (!(x>=this.x && x<=this.x+this.w && y>=this.y && y<=this.y+this.h)) return false;

	double cx,cy,cw,ch,testx,testy;
	
	cw = this.w/2;
	ch = this.h/2;
	testx = Math.abs(this.x+cw-x);
	testy = Math.abs(this.y+ch-y);
	
	cx = Math.sqrt(Math.pow(cw,2)*(1-Math.pow(testy/ch,2)));
	cy = Math.sqrt(Math.pow(ch,2)*(1-Math.pow(testx/cw,2)));

	if (testx == 0) cy = ch;
	if (testy == 0) cx = cw;

	return (testx<=cx && testy<=cy);
}


public void storeDimensions() {
	origCX = x+w/2;
	origCY = y+h/2;
}

public int getResize(int x, int y) {
	if (checkWithin(x,y, this.x+w/2-3, this.y, this.x+w/2+3, this.y+7)) nodeResize = Frame.N_RESIZE_CURSOR; //n
	else if (checkWithin(x,y, this.x+w/2-3, this.y+h-7, this.x+w/2+3, this.y+h)) nodeResize = Frame.S_RESIZE_CURSOR; //s
	else if (checkWithin(x,y, this.x, this.y+h/2-3, this.x+7, this.y+h/2+3)) nodeResize = Frame.W_RESIZE_CURSOR; //w
	else if (checkWithin(x,y, this.x+w-7, this.y+h/2-3, this.x+w, this.y+h/2+3)) nodeResize = Frame.E_RESIZE_CURSOR; //e
	else nodeResize = Frame.DEFAULT_CURSOR;
	storeDimensions();
	return nodeResize;
}

public boolean resize (int x, int y) {
	boolean r=true;
	if (nodeResize==Frame.N_RESIZE_CURSOR || nodeResize==Frame.S_RESIZE_CURSOR) resizeNS(y);
	else if (nodeResize==Frame.W_RESIZE_CURSOR || nodeResize==Frame.E_RESIZE_CURSOR) resizeWE(x);
	else r=false;
	return r;
}

public void resizeNS(int y) {setRadius(Math.abs(origCY-y));}
public void resizeWE(int x) {setRadius(Math.abs(origCX-x));}
public void setRadius(int r) {
	this.x = origCX-r;
	this.y = origCY-r;
	this.h = this.w = r*2;
}

public String getType() {return "circle";}

public String getCoords(String type) {
	int r=w/2;
	if (type=="client") return String.valueOf(x+r)+","+String.valueOf(y+r)+","+String.valueOf(r);
	else if (type=="server") return String.valueOf(x+r)+","+String.valueOf(y+r)+" "+String.valueOf(x+r)+","+String.valueOf(y+2*r);
	else return null;
}

}