/* TO DO: * Canvas resizing isn't handled by the grid(could be zoom, or complete redraw) * PALLETTE!! * Undo feature * Dump to file (Needs Review) * 3D!! *///Global imports of external JRE libraries and event handlersimport objectdraw.*;import java.awt.*;import java.io.*;import java.lang.*;import java.util.*;import java.applet.*;// Extend WindowsController to allow drawing to a canvaspublic class guicode2 extends WindowController { public FilledOval Ball; //the ball Location lastMouse;/* Draw the grid in gray for reference: The loop creates an array of lines * which span the canvas, makes a 10x10 grid. */ private FilledRect X_Grid; private FilledRect Y_Grid; public void onMouseEnter(Location p) { int i = 0; int j = 0; while (i <= canvas.getWidth()) { X_Grid = new FilledRect(i,0,1,canvas.getHeight(),canvas); X_Grid.setColor(Color.GRAY); X_Grid.sendToBack(); Y_Grid = new FilledRect(0,j,canvas.getWidth(),1,canvas); Y_Grid.setColor(Color.GRAY); Y_Grid.sendToBack(); i+=canvas.getWidth()/10; j+=canvas.getHeight()/10; } } public void onMouseExit(Location p) { canvas.clear(); }/* Create a new ball everytime the mouse is clicked. The real cool part is that * the center of the ball is automagically moved to the nearest grid point. */ public void onMouseClick(Location p) { int width; width = 7; /* perhaps width# should be in an array, or even stored in a file to allow * for multiple "balls" in the future. We will need this for the * proteins(different atoms=>different sizes). */ FilledOval Ball = new FilledOval( p.getX()-width/2, p.getY()-width/2, width, width, canvas); Ball.setColor(Color.RED); Ball.moveTo( (canvas.getWidth()/10)*Math.round(p.getX()/(canvas.getWidth()/10))-(width/2), (canvas.getHeight()/10)*Math.round(p.getY()/(canvas.getHeight()/10))-(width/2)); Ball.sendToFront(); }// Create an undo function here/* Make sticks to connect the balls we have. The most important * statement creates a way for the stick to be either going in * the X direction or the Y direction, but not both. */ public void onMousePress(Location point) { lastMouse = point; } public void onMouseDrag(Location p) { if ( (Math.abs(lastMouse.getX()-p.getX()))<Math.abs((lastMouse.getY()-p.getY())) ) { if (p.getY() < lastMouse.getY()) { FilledRect Stick = new FilledRect( (canvas.getWidth()/10)*Math.round(p.getX()/(canvas.getWidth()/10))-1.5, (canvas.getHeight()/10)*Math.round(p.getY()/(canvas.getHeight()/10))-(canvas.getHeight()/10), 3, (canvas.getHeight()/10), canvas); Stick.setColor(Color.BLACK); Stick.sendToBack(); } else { FilledRect Stick = new FilledRect( (canvas.getWidth()/10)*Math.round(lastMouse.getX()/(canvas.getWidth()/10))-1.5, (canvas.getHeight()/10)*Math.round(lastMouse.getY()/(canvas.getHeight()/10)), 3, (canvas.getHeight()/10), canvas); Stick.setColor(Color.BLACK); Stick.sendToBack(); } } else if ( (Math.abs(lastMouse.getX()-p.getX()))>Math.abs((lastMouse.getY()-p.getY())) ) { if (p.getX() < lastMouse.getX()) { FilledRect Stick = new FilledRect( (canvas.getWidth()/10)*Math.round(p.getX()/(canvas.getWidth()/10))-(canvas.getWidth()/10), (canvas.getHeight()/10)*Math.round(p.getY()/(canvas.getHeight()/10))-1.5, (canvas.getWidth()/10), 3, canvas); Stick.setColor(Color.BLACK); Stick.sendToBack(); } else { FilledRect Stick = new FilledRect( (canvas.getWidth()/10)*Math.round(lastMouse.getX()/(canvas.getWidth()/10)), (canvas.getHeight()/10)*Math.round(lastMouse.getY()/(canvas.getHeight()/10))-1.5, (canvas.getWidth()/10), 3, canvas); Stick.setColor(Color.BLACK); Stick.sendToBack(); } } }}//END CLASS//Begin a new input output class. Should try to dump to the Text Document/* public class ReadfromFile { public void main(String args[]) { FileOutputStream fileout; try { fileout = new FileOutputStream ("dump.txt"); new PrintStream (fileout).print("Hello World!"); fileout.close(); } catch (IOException e) { System.err.println("You have an error, revise your code please"); System.exit(-1); } }}*/