Blackberry引路蜂地图开发示例:地图平移
RasterMap 有两个方法可以用于平移地图,panTo 将地图移动到指定经纬度坐标,panDirection(dx,dy) 将地图从当前位置平移dx,dy 个象素。
下列示例可以上,下,左,右平移地图。
[java]
//--------------------------------- PACKAGE ------------------------------------
package com.pstreets.gisengine.demo.rim;
//--------------------------------- IMPORTS ------------------------------------
import com.mapdigit.gis.geometry.GeoLatLng;
import com.mapdigit.gis.raster.MapType;
import com.pstreets.gisengine.demo.MapDemoRIM;
import net.rim.device.api.ui.component.Menu;
import net.rim.device.api.ui.MenuItem;
//[------------------------------ MAIN CLASS ----------------------------------]
/**
* map pan demo for Guidebee Map API on MIDP platform.
* <hr><b>© Copyright 2011 Guidebee, Inc. All Rights Reserved.</b>
* @version 1.00, 09/02/11
* @author Guidebee Pty Ltd.
*/
public class MapPanRIM extends MapDemoRIM {
/**
* Entry point for application
* @param args Command line arguments (not used)
*/
public static void main(String[] args)
{
// Create a new instance of the application and make the currently
// running thread the application's event dispatch thread.
MapPanRIM theApp = new MapPanRIM();
theApp.enterEventDispatcher();
}
private MenuItem mapUpMenuItem = new MenuItem("Up", 0, 0){
public void run(){
map.panDirection(0, -32);
}};
private MenuItem mapDownMenuItem = new MenuItem("Down",1, 0){
public void run(){
map.panDirection(0, 32);
}};
private MenuItem mapLeftMenuItem = new MenuItem("Left",2, 0){
public void run(){
map.panDirection(-32, 0);
}};
private MenuItem mapRightMenuItem = new MenuItem("Right", 3, 0){
public void run(){
map.panDirection(32, 0);
}};
public MapPanRIM() {
init();
pushScreen(canvas);
GeoLatLng center = new GeoLatLng(32.0616667, 118.7777778);
map.setCenter(center, 13, MapType.MICROSOFTCHINA);
}
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