TrafficSim/app/src/main/java/de/hems/trafficsim/TimeRecordView.java
2020-11-09 20:04:55 +01:00

68 lines
2.1 KiB
Java

package de.hems.trafficsim;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
import android.view.ViewGroup;
import java.util.List;
public class TimeRecordView extends View {
protected Paint paint;
protected List<VehicleTimeRecord> records;
protected int pixelPerVehicle;
protected float trackLength;
public TimeRecordView(Context context, List<VehicleTimeRecord> records, float trackLength) {
super(context);
this.records = records;
this.trackLength = trackLength;
this.paint = new Paint();
paint.setColor(Color.BLACK);
paint.setStyle(Paint.Style.FILL_AND_STROKE);
this.setBackgroundColor(Color.BLACK);
}
protected int getColor(float curVelocity, float maxVelocity) {
float perc = curVelocity / maxVelocity;
perc = 1 - perc;
if (perc <= 0.5) {
int red = ((int) (2*perc*0xFF)) << 16;
int green = ((int)0xFF) << 8;
int blue = 0;
return 0xff000000 | red | green | blue;
} else {
int red = ((int)(0xFF)) << 16;
int green = ((int)(0xFF-0xFF*(perc-0.5)*2)) << 8;
int blue = 0;
return 0xff000000 | red | green | blue;
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, 10);
setMeasuredDimension(widthMeasureSpec, 10);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
}
@Override
protected void onDraw(Canvas canvas) {
this.pixelPerVehicle = (int) (this.getWidth() / this.trackLength);
int i = 0;
for (VehicleTimeRecord r : this.records) {
int left = (int) (this.pixelPerVehicle * r.getPosition());
this.paint.setColor(getColor(r.getVelocity(), r.getMaxVelocity()));
canvas.drawRect(left, 0, left + this.pixelPerVehicle - 1,
10, this.paint);
i++;
}
}
}