maptool.java

一个很有特点的地图平台,可以以动画方试展现电子地图,有拉近,拉远,滑动功能,最主要的是它是一个地图维护台,处理地图到数据库的数据导入

package mapcenter.maptools;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import mapcenter.service.*;

public class MapTool extends AbstractAction{
  protected static Log log = LogFactory.getLog("WebGIS");
  protected Icon originalIcon = null;
  protected Icon selectedIcon = null;
  protected Cursor cursor = null;
  protected MapView mapView = null;

  public MapTool(String origIcon,String seleIcon,String menuText,String toolTip,char acceKey) {
    super();
    this.originalIcon = new ImageIcon(getClass().getResource(origIcon));
    this.selectedIcon = new ImageIcon(getClass().getResource(seleIcon));
    this.putValue(NAME,menuText);
    this.putValue(SMALL_ICON, originalIcon);
    this.putValue(SHORT_DESCRIPTION, toolTip);
    this.putValue(ACCELERATOR_KEY, KeyStroke.getKeyStroke(acceKey,
        Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
    this.cursor = new Cursor(Cursor.DEFAULT_CURSOR);
  }
  //============= MouseListener接口实现 =============
  public void mouseEntered(MapMouse evt) {}
  public void mouseExited(MapMouse evt) {}
  public void mousePressed(MapMouse evt) {}
  public void mouseReleased(MapMouse evt) {}
  public void mouseDragged(MapMouse evt) {}
  public void mouseMoved(MapMouse evt) {}
  public void mouseClicked(MapMouse evt) {}
  //============= MapPainter接口实现 ===============
  public void paintOnMap(Graphics g) { }

  public void actionPerformed(ActionEvent evt){
    try{
      String toolName = (String)this.getValue(NAME);
      mapView.setCurrentTool(toolName);
    }catch(Exception e){log.error(e);}
  }

  public void setMapView(MapView mapView){
    this.mapView = mapView;
  }
  public void zoomMoveing(double pointX,double pointY,double zoompen)throws Exception{
    Image renderImage = mapView.getMapHandle().getImg();
    Image bufferImage = mapView.getBuffImg();
    Graphics bufferGrap = bufferImage.getGraphics();
    double mapWidth = renderImage.getWidth(null);
    double mapHeight = renderImage.getHeight(null);
    double containW = mapView.getWidth();
    double containH = mapView.getHeight();
    double marginHor = (mapWidth - containW) / 2;
    double marginVer = (mapHeight - containH) / 2;
    int moveCount = 20;
    int interval = 30;
    double WidthStep = (mapWidth / zoompen - mapWidth) / moveCount;
    double HeightStep = (mapHeight / zoompen - mapHeight) / moveCount;
    double ScreenX = pointX - marginHor;
    double ScreenY = pointY - marginVer;
    double HorStep = (mapWidth / 2 - pointX) / moveCount;
    double VerStep = (mapHeight / 2 - pointY) / moveCount;
    for (int i = 0; i < moveCount; i++) {
      Thread.sleep(interval);
      ScreenX += HorStep;
      ScreenY += VerStep;
      mapWidth += WidthStep;
      mapHeight += HeightStep;
      double left = pointX * (mapWidth/renderImage.getWidth(null)) - ScreenX;
      double top = pointY * (mapHeight/renderImage.getHeight(null)) - ScreenY;
      bufferGrap.clearRect(0, 0, (int)containW, (int)containH);
      bufferGrap.drawImage(renderImage, -(int)left, -(int)top, (int)mapWidth, (int)mapHeight, null);
      mapView.getGraphics().drawImage(bufferImage, 0, 0, null);
    }
  }
}