SkylineGlobe Android 开发 面积计算示例代码

SkylineGlobe Android 开发 面积计算示例代码：

如果之前熟悉SkylineGlobe桌面端的二次开发，看这些代码应该不难理解。

package com.skyline.terraexplorer.tools;

import android.os.Handler;
import android.os.Looper;

import com.skyline.teapi.*;
import com.skyline.teapi.ISGWorld.OnAnalysisProgressListener;
import com.skyline.teapi.ISGWorld.OnLButtonUpListener;
import com.skyline.terraexplorer.R;
import com.skyline.terraexplorer.TEApp;
import com.skyline.terraexplorer.models.MenuEntry;
import com.skyline.terraexplorer.models.TEUnits;
import com.skyline.terraexplorer.models.UI;
import com.skyline.terraexplorer.views.ToolContainer.CloseReason;

public class AreaTool extends ProgressTool implements OnLButtonUpListener, OnAnalysisProgressListener {
	
	private double groundArea;
	private String toolContainerText;
	
	@Override
	public MenuEntry getMenuEntry() {
		return MenuEntry.createFor(this, R.string.mm_analyze_area, R.drawable.area,MenuEntry.MenuEntryAnalyze(), 20);
	}
	
	private void startDrawPolygon()
	{
	    // start draw polygon
		ISGWorld.getInstance().getCommand().Execute(1012, 5);
	    
	    // get object
	    String objectId = (String)ISGWorld.getInstance().GetParam(7200);
	    ITerrainPolygon areaPolygon = ISGWorld.getInstance().getCreator().GetObject(objectId).CastTo(ITerrainPolygon.class); 
	    if (areaPolygon != null)
	    {
	        areaPolygon.getPosition().setAltitudeType(AltitudeTypeCode.ATC_TERRAIN_RELATIVE);
	        areaPolygon.SetParam(5440, null); 	// Give the polygon X-Ray look
	        areaPolygon.SetParam(5441, null); 	// // Make sure we do not see the red "edit vertex helper polyline"
	        areaPolygon.getLineStyle().setWidth(-2.0);                 // Make the polygon a bit wider
	    }
	}
	
	@Override
	public boolean onBeforeOpenToolContainer() {
		super.onBeforeOpenToolContainer();
		showNormalButtons();
		updateArea(0,0);
		groundArea = 0;
		UI.runOnRenderThread(new Runnable() {			
			@Override
			public void run() {
				// start draw polygon
				startDrawPolygon();
			    // subscribe to lButtonUp as an event that causes the polygon to change
				ISGWorld.getInstance().addOnLButtonUpListener(AreaTool.this);
			}
		});
		return true;
	}
	
	@Override
	public boolean onBeforeCloseToolContainer(CloseReason closeReason) {
		super.onBeforeCloseToolContainer(closeReason);
		UI.runOnRenderThread(new Runnable() {			
			@Override
			public void run() {
			    String objectId = (String) ISGWorld.getInstance().GetParam(7200);
			    // simulate right click to end drawing
			    ISGWorld.getInstance().SetParam(8044, 0);
			    ISGWorld.getInstance().getCreator().DeleteObject(objectId);
			    ISGWorld.getInstance().removeOnLButtonUpListener(AreaTool.this);
			}
		});
	    return true;
	}
	
	private void updateArea(final double area, final double perimeter)
	{
		UI.runOnUiThreadAsync(new Runnable() {			
			@Override
			public void run() {
				if(area == 0 || perimeter == 0)
				{
					toolContainerText = "";
				}
				else
				{
					String aerialText = String.format(TEApp.getAppContext().getString(R.string.measure_area_area), TEUnits.instance.formatArea(area));
					String verticalText = String.format(TEApp.getAppContext().getString(R.string.measure_area_perimeter), TEUnits.instance.formatDistance(perimeter));
					toolContainerText = String.format("%s
%s",aerialText, verticalText);
				}
				toolContainer.setText(toolContainerText);
			}
		});
	}
	
	@Override
	public void onButtonClick(int tag) {
		super.onButtonClick(tag);
	    switch (tag) {
	        case 1: // delete all points
	        {
	        	// bug fix 18295 
	        	groundArea = 0;
	        	
	    	    updateArea(0, 0);
	    	    UI.runOnRenderThread(new Runnable() {					
					@Override
					public void run() {
			            String objectId = (String) ISGWorld.getInstance().GetParam(7200);
			            // simulate right click to end drawing            
			    	    ISGWorld.getInstance().SetParam(8044, 0);
			    	    // delete object
			    	    ISGWorld.getInstance().getCreator().DeleteObject(objectId);
			            // and start adding again
			    	    startDrawPolygon();
					}
				});
	            // get object
	            break;
	        }
	        case 3: // calculate ground area
	        	doWorkAsync();
	            break;
	        default:
	            break;
	    }

	}
	
	@Override
	protected void doWork() {
		if(groundArea <= 0)
		{
			ISGWorld.getInstance().addOnAnalysisProgressListener(this);
	        groundArea = calculateGroundArea();
			ISGWorld.getInstance().removeOnAnalysisProgressListener(this);
		}
	}

	@Override
	public boolean OnAnalysisProgress(int CurrPos, int Range) {
		setProgress(CurrPos, Range);
		return workCanceled;
	}		

	@Override
	protected void workCompleted() {
		if(workCanceled == false)
		{
	        String groundText = String.format(TEApp.getAppContext().getString(R.string.measure_area_ground), TEUnits.instance.formatArea(groundArea));
	        String text = String.format("%s
%s",groundText, toolContainerText);
	        toolContainer.setText(text);
		}
	}
	
	private double calculateGroundArea()
	{
	    String objectId = (String)ISGWorld.getInstance().GetParam(7200);
	    ITerrainPolygon areaPolygon = ISGWorld.getInstance().getCreator().GetObject(objectId).CastTo(ITerrainPolygon.class); 
	    if (areaPolygon != null)
	    {
	        double area = ISGWorld.getInstance().getAnalysis().MeasureTerrainSurface(areaPolygon.getGeometry(), 0);
	        return area;
	    }	    
	    return 0;
	}
	
	@Override
	protected void showNormalButtons() {
	    toolContainer.removeButtons();
	    toolContainer.addButton(1, R.drawable.delete);
	    //toolContainer.addButton(2, R.drawable.delete_last_point);
	    toolContainer.addButton(3, R.drawable.calc_area);
	}

	@Override
	public boolean OnLButtonUp(int Flags, int X, int Y)
	{
		new Handler(Looper.getMainLooper()).postDelayed(new Runnable() {
			@Override
			public void run() {
				UI.runOnRenderThread(new Runnable() {
					@Override
					public void run() {
			            String objectId = (String) ISGWorld.getInstance().GetParam(7200);
				        ITerrainPolygon areaPolygon = ISGWorld.getInstance().getCreator().GetObject(objectId).CastTo(ITerrainPolygon.class);
				        IPolygon poly = areaPolygon.getGeometry().CastTo(IPolygon.class);
				        if (poly != null)
				        {
				        	double area = (Double)areaPolygon.GetParam(5430);
				            double perimeter = poly.getExteriorRing().getLength();
				            updateArea(area, perimeter);
				            groundArea = 0;
				        }
					}
				});
			}
		}, 10);
		return false;
	}

}