mapcanvas.java

A part public bus simulation system, mainly about map design, java file, groupwork, helpful to the b

/* Written by : Lee Jiayi 
 * Assisted by : Zhang Haoze and Koh Ling Xin
 * Description of class: Class is used to contains mapCanvas as a means of 
 * being able to scroll mapCanvas when the physical size
 * becomes bigger than the scrollPane
 * Description of methods: Methods of this class are purely delegation method, ie
 * it only forward the method to mapCanvas
 */

package GUI;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import javax.swing.event.MouseInputListener;
import java.awt.event.MouseEvent;
import java.util.Observable;
import java.util.Observer;
import javax.swing.JPanel;
import tools.*;
import java.lang.Integer;

public class MapCanvas extends JPanel implements MouseInputListener, Observer {
	//for use with setMode and stuff relating to mode
	
    	private static final int SELECT = 1;
        private static final int DELETE = 2;
        private static final int MOVE = 3;
        private static final int CUT = 4;
        private static final int COPY = 5;
        private static final int PASTE = 6;
        private static final int BUSSTOP1 = 7;
        private static final int BUSSTOP2 = 8;
        private static final int ROAD1 = 9;
        private static final int ROAD2 = 10;
        private static final int ROAD3 = 11;
        private static final int ROAD4 = 12;
        private static final int ROAD5 = 13;
        private static final int ROAD6 = 14;
        private static final int ROADJUNCTION = 15;
        private static final int Depot = 16;
        //private static final int TRAFFICLIGHT = 17;
		private static final int BUSROUTE = 18;
        
	//for use with convertGridToScreen
		private final int LOC_TOPLEFT=0;
		private final int LOC_TOPRIGHT=1;
		private final int LOC_BOTTOMLEFT=2;
		private final int LOC_BOTTOMRIGHT=3;
		private final int LOC_CENTER=4;
	
	//defines colors used in drawing some of the objects
        private static final Color C_BACKGROUD = Color.WHITE;
	private static final Color C_BUSSTOP = Color.RED;
        private static final Color C_ROAD1 = Color.GRAY;
        private static final Color C_ROAD2 = Color.DARK_GRAY;
        private static final Color C_ROAD3 = Color.BLUE;
        private static final Color C_ROAD4 = Color.GREEN;
        private static final Color C_ROAD5 = Color.ORANGE;
        private static final Color C_ROAD6 = Color.YELLOW;
        private static final Color C_ROADJUNCTION = Color.BLACK;
        private static final Color C_Depot = Color.GREEN;
        private static final Color C_BUSROUTE = Color.CYAN;
        private static final Color C_TEMP_BUSROUTE = Color.WHITE;
        private static final Color C_GRIDLINE = Color.BLACK;
        private static final Color C_SELECTED = Color.MAGENTA;
        
	//IDs for tools
        private final int ID_BUSSTOP1 = 1;
        private final int ID_BUSSTOP2 = 2;
        private final int ID_ROAD1 = 3;
        private final int ID_ROAD2 = 4;
        private final int ID_ROAD3 = 5;
        private final int ID_ROAD4 = 6;
	private final int ID_ROAD5 = 7;
        private final int ID_ROAD6 = 8;
        private final int ID_ROADJUNCTION= 9;
        private final int ID_Depot = 10;
        //private final int ID_TRAFFICLIGHT = 11;
        private final int ID_BUSROUTE= 12;
        
	private int drawingHeight; //height of canvas in pixel
	private int gridSize; //size of 1 grid in pixels
	private int drawingWidth; //width of canvas in pixel

	//for use with mouse events
	//there are 2 types of coordinates, screen and grid
	//screen corresponding to the actual screen coordinates
	//grid corresponding to the coordinates of the map grid, ie 0,0 to 29,29
	private Point mouseOverPoint=new Point(); //point where the mouse is over(grid coordinates)
	private Point pointClicked; //last point clicked(grid coordinates)
	private Point storePoint; //first point that is clicked after a mode change(grid coordinates)
	
	private int startIndex; //index to use to refer to grid(0 or 1)
	private MapData mapData; //class where infomation of the map is stored
	private int mapSizeY; //height of canvas in grid
	private int mapSizeX; //width of canvas in grid
	private int mode=1; //mode which the canvas is in
	
	//below is for zooming purpose
	private int offsetX; //X coordinates where the actual canvas is on the JPanel
	private int offsetY; //Y coordinates where the actual canvas is on the JPanel
	
	//for naming newly created roads and busRoute
	private int busRouteNo=1;
	
	private Point selectedPoint;
	private BusRoute tempBusRoute;
	private BusRoute displayedBusRoute;
	
	private CmeGUI frame;
	
	
	MapCanvas() {
		super();
		initialize(0,0,20);
	}
	MapCanvas(int width, int height) {
		super();
		initialize(width,height,20);
	}
	MapCanvas(int width,int height,int gridSize) {
		super();
		initialize(width,height,gridSize);
	}
	
	/* return screen coordinates corresponding to grid coordinates and location
	 * location is - LOC_TOPLEFT,LOC_TOPRIGHT,LOC_CENTER,LOC_BOTTOMLEFT,LOC_BOTTOMRIGHT
	 */
	private Point convertGridToScreen(Point k,int location) {
		Point p1 = new Point();
		//p1 holds center of grid
                
		p1.setLocation(getOrigin().getX()+k.getX()*gridSize+0.5*gridSize,
				getOrigin().getY()-k.getY()*gridSize-0.5*gridSize);
		//offset p1 according to location
		if (location==LOC_TOPLEFT) {
			p1.setLocation(p1.getX()-gridSize/2,p1.getY()-gridSize/2);
                        //System.out.println(p1.getX() + " " +p1.getY());
		} else if (location ==LOC_TOPRIGHT) {
			p1.setLocation(p1.getX()+gridSize/2,p1.getY()-gridSize/2);			
		}
		else if (location ==LOC_BOTTOMLEFT) {
			p1.setLocation(p1.getX()-gridSize/2,p1.getY()+gridSize/2);
		}
		else if (location ==LOC_BOTTOMRIGHT) {
			p1.setLocation(p1.getX()+gridSize/2,p1.getY()+gridSize/2);
		}
		//return p1
		return p1;
	}
	
	/*
	 * return grid coordinates correspoinding to screen coordinates
	 */private Point convertScreenToGrid(Point point) {
	 	int x,y;
	 	x=(int)point.getX()-offsetX;
	 	y=(int)point.getY()-offsetY;
	 	x=x/gridSize + startIndex;
	 	y=mapSizeY - 1 - (y/gridSize - startIndex);
	 	Point pt = new Point(x,y);
	 	return pt;
	 }
	 /*
	  * function to add Depot to mapData
	  * error checking is done by MapData class
	  */
	 private void addDepot() {
	 	Depot b = new Depot(pointClicked);
	 	if (!mapData.add(pointClicked,b)) {
	 		//Depot not added
	 		frame.setStatus("Depot not added");
	 	} else {
	 		//Depot added
	 		frame.setStatus("Depot added");
	 		//select Depot added
	 		mapData.setSelected(pointClicked,ID_Depot);
	 	}
	 }
	 
	 /*
	  * function to add bus route to mapData
	  * bus routed added is already created properly via
	  * createBusRoute() function	(ADDED BY JEFFREY ON 18/10)
	  */
	/* private void addBusRoute() {
	 	//add tempBusRoute to mapData
 		mapData.addBusRoute(tempBusRoute);
 		//bus route added
 		frame.setStatus("Bus route No " + busRouteNo + " added");
 		//update bus route dialog
 		frame.updateBusRouteDialog();
 		//incremental bus route no
 		busRouteNo++;
 		tempBusRoute=null; //prepare for next bus route;
	 }*/
	 
	 /*
	  * function to add bus stop 1 at pointClicked
	  * error checking is done in MapData
	  */
	 private void addBusStop1() {
	 	BusStop1 bs = new BusStop1(pointClicked);
	 	if (!mapData.add(pointClicked,bs)) {
	 		//bus stop not added
	 		frame.setStatus("Busstop1 not added");
	 	} else {
	 		//bus stop added
	 		frame.setStatus("Busstop1 added");
	 		//select bus stop added
	 		mapData.setSelected(pointClicked,ID_BUSSTOP1);
	 	}
	 }
	
	 /*
	  * function to add bus stop 2 at pointClicked
	  * error checking is done in MapData
	  */
	 private void addBusStop2() {
	 	BusStop2 bs = new BusStop2(pointClicked);
	 	if (!mapData.add(pointClicked,bs)) {
	 		//bus stop not added
	 		frame.setStatus("Busstop2 not added");
	 	} else {
	 		//bus stop added
	 		frame.setStatus("Busstop2 added");
	 		//select bus stop added
	 		mapData.setSelected(pointClicked,ID_BUSSTOP2);
	 	}
	 }
 
 	 /*
	  * function to add Road 1 to mapData
	  * error checking is done in MapData
	  */
	 private void addRoad1() {
	 	Road1 r = new Road1(pointClicked);
	 	if (!mapData.add(pointClicked,r)) {
	 		//traffic light not added
	 		frame.setStatus("Road 1 not added");
	 	} else {
	 		//traffic light added
	 		frame.setStatus("Road 1 created");
	 		//select traffic light added
	 		mapData.setSelected(pointClicked,ID_ROAD1);
	 	}	 	
	 }       
	 
 	 /*
	  * function to add Road 1 to mapData
	  * error checking is done in MapData
	  */
	 private void addRoad2() {
	 	Road2 r = new Road2(pointClicked);
	 	if (!mapData.add(pointClicked,r)) {
	 		//traffic light not added
	 		frame.setStatus("Road 2 not added");
	 	} else {
	 		//traffic light added
	 		frame.setStatus("Road 2 created");
	 		//select traffic light added
	 		mapData.setSelected(pointClicked,ID_ROAD2);
	 	}	 	
	 }   
	 
 	 /*
	  * function to add Road 3 to mapData
	  * error checking is done in MapData
	  */
	 private void addRoad3() {
	 	Road3 r = new Road3(pointClicked);
	 	if (!mapData.add(pointClicked,r)) {
	 		//traffic light not added
	 		frame.setStatus("Road 3 not added");
	 	} else {
	 		//traffic light added
	 		frame.setStatus("Road 3 created");
	 		//select traffic light added
	 		mapData.setSelected(pointClicked,ID_ROAD3);
	 	}	 	
	 }              
	 
 	 /*
	  * function to add Road 4 to mapData
	  * error checking is done in MapData
	  */
	 private void addRoad4() {
	 	Road4 r = new Road4(pointClicked);
	 	if (!mapData.add(pointClicked,r)) {
	 		//traffic light not added
	 		frame.setStatus("Road 4 not added");
	 	} else {
	 		//traffic light added
	 		frame.setStatus("Road 4 created");
	 		//select traffic light added
	 		mapData.setSelected(pointClicked,ID_ROAD4);
	 	}	 	
	 }  
	 
 	 /*
	  * function to add Road 5 to mapData
	  * error checking is done in MapData
	  */
	 private void addRoad5() {
	 	Road5 r = new Road5(pointClicked);
	 	if (!mapData.add(pointClicked,r)) {
	 		//traffic light not added
	 		frame.setStatus("Road 5 not added");
	 	} else {
	 		//traffic light added
	 		frame.setStatus("Road 5 created");
	 		//select traffic light added
	 		mapData.setSelected(pointClicked,ID_ROAD5);
	 	}	 	
	 }     
	 
 	 /*
	  * function to add Road 6 to mapData
	  * error checking is done in MapData
	  */
	 private void addRoad6() {
	 	Road6 r = new Road6(pointClicked);
	 	if (!mapData.add(pointClicked,r)) {
	 		//traffic light not added
	 		frame.setStatus("Road 6 not added");
	 	} else {
	 		//traffic light added
	 		frame.setStatus("Road 6 created");
	 		//select traffic light added
	 		mapData.setSelected(pointClicked,ID_ROAD6);
	 	}	 	
	 }        
	 
 	 /*
	  * function to add Road Juntion to mapData
	  * error checking is done in MapData
	  */
	 private void addRoadJunction() {
	 	RoadJunction r = new RoadJunction(pointClicked);
	 	if (!mapData.add(pointClicked,r)) {
	 		//traffic light not added
	 		frame.setStatus("Road Junction not added");
	 	} else {
	 		//traffic light added
	 		frame.setStatus("Road Junction created");
	 		//select traffic light added
	 		mapData.setSelected(pointClicked,ID_ROADJUNCTION);
	 	}	
         }
	 	 
	 /*
	  * function to create bus route	(ADDED BY JEFFREY ON 18/10)
	  */
	 private void createBusRoute() {
	 	//create tempBusRoute if it is null
	 	if (tempBusRoute==null) {
	 		tempBusRoute= new BusRoute();
	 		tempBusRoute.setBusNum(busRouteNo);
	 	}
	
	 	//inform BusRoute whether pointClicked is on road
	 	if (mapData.isOnRoad(pointClicked)) {
	 		tempBusRoute.setisOnRoad();
	 	}
	
	 	//inform BusRoute whether pointClicked is a interchange
	 	if (mapData.isDepot(pointClicked)) {
	 		tempBusRoute.setIsDepot();
	 	}
	
	 	//add pointClicked to busRoute
	 	if (tempBusRoute.addPoint(pointClicked)) {
	 		//point is accepted
	 		frame.setStatus("Point ("+(int)pointClicked.getX()+","+
	 				(int)pointClicked.getY()+") added to bus route");
	 		//repaint mapCanvas to reflect the added point
	 		repaint();
	 	} else {
	 		//point is not accepted
	 		frame.setStatus("Point not added to bus route");
	 	}
	 	
	 	//check if busRoute is complete
	 	if (tempBusRoute.isComplete()) {
                        frame.setStatus("Bus route completed");
	 		//busRoute is complete,add to mapData
	 		mapData.addBusRoute(tempBusRoute);
                        frame.setStatus("Bus route No " + busRouteNo + " added");
                        //update bus route dialog
                        frame.updateBusRouteDialog();
                        //incremental bus route no
                        busRouteNo++;
                        tempBusRoute=null; //prepare for next bus route;
	 	}
	 }
	 	 
	 /*
	  * function to drawDepot at point pt
	  * a square of color C_Depot is drawn in the grid corresponding
	  * 
	  */
	 private void drawDepot(Graphics g,Point pt) {
	 	//create new graphics object so as not to mess with original graphics
	 	Graphics g2 = g.create();
	 	g2.setColor(C_Depot);
	 	int x1,y1,width,height;
	 	x1=(int) convertGridToScreen(pt,LOC_TOPLEFT).getX()+1;
	 	y1=(int) convertGridToScreen(pt,LOC_TOPLEFT).getY()+1;
	 	width = gridSize-1;
	 	height = gridSize-1;
	 	g2.fillRect(x1,y1,width,height);	
	 }
	 
	 /*
	  * function to draw bus route based on temp bus route
	  * a white line is drawn from point to point tracing out
	  * the temp bus route
	  * also, the displayed bus route is drawn as well.
	  * a black line is drawn from point to point tracing out
	  * the displayed bus route
	  */
	 private void drawBusRoute(Graphics g) {
	 	//create new graphics object so as not to mess with original graphics
	 	Graphics g2 = g.create();
	 	Point x=null,y=null;
	 	
	 	//set color of displayed bus route
	 	g2.setColor(C_BUSROUTE);
	 	//draw displayed bus route
	 	if (displayedBusRoute!=null) {
	 		//displayed bus route is a valid bus route
	 		//thus busRoute.length must be >=2
	 		int rectHeight,rectWidth;
	 		for (int i=1;i<displayedBusRoute.getLength();i++) {
	 			//draw line from point (i-1) to i
	 			x = displayedBusRoute.getPoint(i);
	 			y = displayedBusRoute.getPoint(i-1);
	 			//set x=top/left and y=bottom/right
	 			if (x.getX()>y.getX() || x.getY()<y.getY()) {
	 				//y is top left
	 				Point temp;
	 				temp=x;x=y;y=temp;
	 			}
	 			//calculate height and width of line(rect)
	 			if (x.getX()==y.getX()) {
	 				//vertical line
	 				rectHeight=gridSize*5/4;
	 				rectWidth=gridSize/4;
	 			} else {
	 				//horizontal line
	 				rectHeight=gridSize/4;
	 				rectWidth=gridSize*5/4;
	 			}
	 			x = convertGridToScreen(x,LOC_CENTER);