/*
This class is a basic extension of the Applet class. It would generally be
used as the main class with a Java browser or the AppletViewer. But an instance
can be added to a subclass of Container. To use this applet with a browser or
the AppletViewer, create an html file with the following code:
A simple program
You can add controls to camDraw with Cafe Studio.
(Menus can be added only to subclasses of Frame.)
*/
import java.awt.*;
import java.applet.*;
class ImagePanel extends Panel {
Image image;
public ImagePanel(Applet applet,String image) {
this.image = applet.getImage(applet.getDocumentBase(),image);
}
public void paint(Graphics g) {
Rectangle r = bounds();
g.drawImage(image,0,0,r.width,r.height,this);
}
}
class ImageCanvas extends Canvas {
public ImageCanvas() {
reshape(0,0,501,301);
}
public void drawArrow(Graphics g,int x1,int y1,int x2,int y2) {
int ARROWSIZE = 10;
double ARROWANGLE = Math.PI/6;
Point AL,AR;
double px,py;
double alpha,alphaL,alphaR;
double Alx,Aly,Arx,Ary;
px = x2 - x1;
py = y1 - y2;
// Calculating alpha, alphaL, alphaR...
if (px == 0) alpha = (py < 0) ? Math.PI/2 : -Math.PI/2;
else alpha = Math.atan(py / px);
// Calculating alphaL, alphaR...
alphaL = alpha - ARROWANGLE;
alphaR = alpha + ARROWANGLE;
// Calculating arrow projections...
Alx = Math.cos(alphaL) * ARROWSIZE;
Aly = Math.sin(alphaL) * ARROWSIZE;
Arx = Math.cos(alphaR) * ARROWSIZE;
Ary = Math.sin(alphaR) * ARROWSIZE;
// Calculating arrow points...
if (px > 0)
{
AL = new Point((int)x2 - (int)(Alx),(int)y2 + (int)(Aly));
AR = new Point((int)x2 - (int)(Arx),(int)y2 + (int)(Ary));
}
else
{
AL = new Point((int)x2 + (int)(Alx),(int)y2 - (int)(Aly));
AR = new Point((int)x2 + (int)(Arx),(int)y2 - (int)(Ary));
}
// Drawing...
g.drawLine(x1,y1,x2,y2);
g.drawLine(AL.x,AL.y,x2,y2);
g.drawLine(AR.x,AR.y,x2,y2);
}
public void drawRSC(Graphics g) {
Rectangle r = bounds();
//int hlines = r.height / 10;
//int vlines = r.width / 10;
/*
g.draw3DRect(0, 0, r.width-1, r.height-1,true);
g.drawLine(0, 0, r.width, r.height);
g.drawLine(r.width, 0, 0, r.height);
g.drawLine(0, r.height / 2, r.width, r.height / 2);
g.drawLine(r.width / 2, 0, r.width / 2, r.height);
*/
// CAMILA source code generation
g.drawRect(150,0,200,300);
g.drawString("BREL",234,150);
g.drawString("(A*B)-set",218,225);
drawArrow(g,0,37,150,37);
g.drawString("EMPTY 2 ",0,27);
g.drawLine(0,74,150,74);
g.drawString("EQ (A*B)-set 2 ",0,64);
g.drawLine(0,111,150,111);
g.drawString("GET A*B ",0,101);
g.drawLine(0,148,150,148);
g.drawString("IN A*B 2 ",0,138);
g.drawLine(0,185,150,185);
g.drawString("INIT ",0,175);
g.drawLine(0,222,150,222);
g.drawString("INS A*B ",0,212);
g.drawLine(0,259,150,259);
g.drawString("NOP ",0,249);
g.drawLine(350,37,500,37);
g.drawString("RD (A*B)-set ",388,27);
g.drawLine(350,74,500,74);
g.drawString("REM A*B ",428,64);
g.drawLine(350,111,500,111);
g.drawString("REML B ",436,101);
g.drawLine(350,148,500,148);
g.drawString("REMR A ",436,138);
g.drawLine(350,185,500,185);
g.drawString("SELL B A-set ",396,175);
g.drawLine(350,222,500,222);
g.drawString("SELR A B-set ",396,212);
g.drawLine(350,259,500,259);
g.drawString("WR (A*B)-set ",388,249);
}
public void paint(Graphics g) {
/*
if (focus) {
g.setColor(Color.red);
} else {
g.setColor(Color.darkGray);
}
*/
drawRSC(g);
}
}
public class camDraw extends Applet {
public void init() {
super.init();
//{{INIT_CONTROLS
//setLayout();
add(new ImageCanvas());
resize(preferredSize());
//}}
}
public boolean handleEvent(Event event) {
return super.handleEvent(event);
}
//{{DECLARE_CONTROLS
//Label lblCopyright;
//}}
}