package jp.eclipse;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity {
	public Button bt;
	public sView sv;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		LinearLayout LL= new LinearLayout(this);
		LL.setOrientation(LinearLayout.VERTICAL);
		setContentView(LL);
		TextView tv=new TextView(this);	LL.addView(tv);
		tv.setText("    マンデルブロー集合");
		bt=new Button(this); bt.setText("描画");
		bt.setOnClickListener(new btOnClick());
		LL.addView(bt);
		sv=new sView(this, 100,100,240,240);
		LL.addView(sv);
	}
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	class btOnClick implements OnClickListener{
		public void onClick(View v){
			if(v==bt){
				sv.iflag=true;
				sv.invalidate();
			}
		}
	}
	class sView extends View{
		public double SX, SY, BX, BY;
		public int MD = 4;
		public Paint[] p;
		public boolean iflag=false; 
		public sView(Context cn, double scaleX, double scaleY, double baseX, double baseY){
			super(cn);
			SX=scaleX; SY=scaleY; BX=baseX; BY=baseY;
			p=new Paint[MD];
			for(int i=0;i<MD; i++)p[i]=new Paint();
			p[0].setColor(0xFF800000);
			p[1].setColor(0xFFFF8000);
			p[2].setColor(0xFFFFFF00);
			p[3].setColor(0xFFFFFF80);
		}
		protected void onDraw(Canvas cs){	// マンデルブロー集合計算表示
			if(!iflag) return;
			double DT=0.01;
			for(double C=-2; C<=2; C+=DT)
				for(double D=-2; D<=2; D+=DT) drawXY(cs, cmpIteration(C,D), C,D);
		}
		int cmpIteration(double C, double D){	//複素数の収れん計算
			double A=0, B=0, AA, BB, DA, DB, R;
			for(int i=0; i<100; i++){
				AA = A; BB = B; A = AA * AA - BB * BB + C; B = 2 * AA * BB + D;
				R = A * A + B * B; if(R >= 4) return i;
				DA = A - AA; DB = B - BB; if(DA * DA + DB * DB < 0.001)return i;
			}
			return 100;
		}
		void drawXY(Canvas cs, int i, double X, double Y){
			float XX = (float)(SX * X + BX), YY = (float)(SY * Y + BY);
			cs.drawRect(XX, YY,XX+1,YY+1,p[i % MD]);
		}
	}
}