nudgenavigate.java

geotools的源码

/*
 * NudgeNavigate.java
 *
 * Created on November 15, 2001, 2:01 PM
 */

package uk.ac.leeds.ccg.widgets;
import java.awt.*;
import uk.ac.leeds.ccg.geotools.*;
/**
 *
 * @author  jamesm
 */
public class NudgeNavigate extends java.awt.Panel {
    Viewer view;
    Image inIcon = null;
    Image outIcon = null;
    /** Creates new form NudgeNavigate */
    public NudgeNavigate(Viewer v) {
        initComponents();
        view = v;
    }
    
    public NudgeNavigate(Viewer v,Image in,Image out) {
        initComponents();
        view = v;
        inIcon = in;
        outIcon = out;
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    private void initComponents() {//GEN-BEGIN:initComponents
        
        setLayout(new java.awt.GridBagLayout());
        java.awt.GridBagConstraints gridBagConstraints1;
        
        addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                clicked(evt);
            }
        });
        
    }//GEN-END:initComponents

    public static final int NW=0,N=1,NE=2,OUT=3,W=10,C=11,E=12,BLANK=13,SW=20,S=21,SE=22,IN=23;
    private void clicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_clicked
         int x = evt.getX();
         int y= evt.getY();
         int w = Math.min(getBounds().width,getBounds().height);

         int col = x/(w/4);
         int row = y/(w/3);
         System.out.println("["+col+":"+row+"]");
         int id = col+10*row;
         double oldPercent = view.getZoomAsPercent();
         GeoRectangle oldBounds = view.scale.getMapExtent();
         GeoPoint center = new GeoPoint(oldBounds.x+oldBounds.width/2,oldBounds.y+oldBounds.height/2);
         switch(id){
             case NW:
                 System.out.println("North West");
                 center.y+=oldBounds.height/3d;
                 center.x-=oldBounds.width/3d;
                 break;
             case N:
                 System.out.println("North");
                 center.y+=oldBounds.height/3d;
                 break;
             case NE:
                 System.out.println("North East");
                 center.y+=oldBounds.height/3d;
                 center.x+=oldBounds.width/3d;
                 break;
             case W:
                 System.out.println("West");
                 center.x-=oldBounds.width/3d;
                 break;
             case E:
                 System.out.println("East");
                 center.x+=oldBounds.width/3d;
                 break;
             case SW:
                 System.out.println("South West");
                 center.y-=oldBounds.height/3d;
                 center.x-=oldBounds.width/3d;
                 break;
             case S:
                 System.out.println("South");
                 center.y-=oldBounds.height/3d;
                 break;
             case SE:
                 System.out.println("South East");
                 center.y-=oldBounds.height/3d;
                 center.x+=oldBounds.width/3d;
                 break;
             case IN:
                 System.out.println("Zoom In");
                 view.zoomPercent(oldPercent+oldPercent/2d);
                 break;
             case OUT:
                 System.out.println("Zoom Out");
                 view.zoomPercent(oldPercent-oldPercent/2d);
                 break;
             default:
                 System.out.println("Null");
         }
         view.centerOnPoint(center);
    }//GEN-LAST:event_clicked
    
    
    public void paint(Graphics g){
        int w = this.getSize().width;
        int h = this.getSize().height;
        w = Math.min(w,h);
        h = Math.min(w,h);
        int wgap = w/4;
        int hgap = h/3;
        int step = 0; 
        g.drawRect(0,0,w,h);
        for(int i=1;i<5;i++){
         
            g.drawLine(wgap*i,0,wgap*i,h);
            
        }
        for(int i=1;i<4;i++){
            g.drawLine(0,hgap*i,w,hgap*i);
            //this.drawArrow(g,wgap*(i-1)+wgap/2,100,i,100);
            //this.drawArrow(g,wgap*(i-1)+wgap/2,400,i+4,100);
        }
        drawArrow(g,wgap/2,hgap/2,3,wgap);//nw
        drawArrow(g,wgap+wgap/2,hgap/2,4,wgap);//n
        drawArrow(g,wgap*2+wgap/2,hgap/2,5,wgap);//ne
        drawArrow(g,wgap/2,hgap/2+hgap,2,wgap);//w
        drawArrow(g,wgap*2+wgap/2,hgap/2+hgap,6,wgap);//e
        drawArrow(g,wgap/2,hgap*2+hgap/2,1,wgap);//sw
        drawArrow(g,wgap+wgap/2,hgap*2+hgap/2,8,wgap);//s
        drawArrow(g,wgap*2+wgap/2,hgap*2+hgap/2,7,wgap);//se
        
        if(inIcon !=null && outIcon!=null){
          g.drawImage(outIcon,wgap*3+1,1,wgap-2,hgap-2,null);
          g.drawImage(inIcon,wgap*3+1,hgap*2+1,wgap-2,hgap-2,null);
        }
        
        
        
      
    }
    
    
    public Dimension getPreferredSize(){
        return new Dimension(60,40);
    }
    
    public void drawArrow(Graphics g,int x,int y,int step,int size){
        size=size/2;
        double xp[] = {0,-.57,.57,0};
        double yp[] = {.66,-0.33,-.33,.66};
        //System.out.println(Math.cos(Math.PI/4)));
        int xi[] = new int[4];
        int yi[] = new int[4];
        double change = Math.cos(Math.PI/4d);
        for(int i=0;i<4;i++){
            for(int j=0;j<step;j++){
                double tx = change*xp[i]-yp[i]*change;
                yp[i] = change*xp[i]+yp[i]*change;
                xp[i]=tx;
                
            }
            xi[i] = (int)(xp[i]*size+x);
            yi[i] = (int)(yp[i]*size+y);
        }
        
        g.fillPolygon(xi,yi,4);
    }
   
    public class ClickListener extends java.awt.event.MouseAdapter{
        
        
    }
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
    public static void main(String[] args){
        Frame f = new Frame();
        //f.setSize(50,50);
        f.setBackground(Color.black);
        f.setForeground(Color.green.darker());
        f.add(new NudgeNavigate(new Viewer()));
        f.show();
    }
}