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package cgeo.geocaching.ui;
import cgeo.geocaching.R;
import cgeo.geocaching.geopoint.Geopoint;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.util.AttributeSet;
import android.view.View;
public class CompassMiniView extends View {
private int arrowSkin = R.drawable.compass_arrow_mini_white;
private Context context = null;
private Geopoint cacheCoords = null;
private Bitmap compassArrow = null;
private float azimuth = 0;
private float heading = 0;
private PaintFlagsDrawFilter setfil = null;
private PaintFlagsDrawFilter remfil = null;
public CompassMiniView(Context contextIn) {
super(contextIn);
context = contextIn;
}
public CompassMiniView(Context contextIn, AttributeSet attrs) {
super(contextIn, attrs);
context = contextIn;
TypedArray attributes = context.obtainStyledAttributes(attrs, R.styleable.cgCompassMini);
int usedSkin = attributes.getInt(R.styleable.cgCompassMini_skin, 0);
if (usedSkin == 1) {
arrowSkin = R.drawable.compass_arrow_mini_black;
} else {
arrowSkin = R.drawable.compass_arrow_mini_white;
}
}
@Override
public void onAttachedToWindow() {
compassArrow = BitmapFactory.decodeResource(context.getResources(), arrowSkin);
setfil = new PaintFlagsDrawFilter(0, Paint.FILTER_BITMAP_FLAG);
remfil = new PaintFlagsDrawFilter(Paint.FILTER_BITMAP_FLAG, 0);
}
@Override
public void onDetachedFromWindow() {
if (compassArrow != null) {
compassArrow.recycle();
compassArrow = null;
}
}
public void setContent(final Geopoint cacheCoordsIn) {
cacheCoords = cacheCoordsIn;
}
protected void updateAzimuth(float azimuthIn) {
azimuth = azimuthIn;
updateDirection();
}
protected void updateHeading(float headingIn) {
heading = headingIn;
updateDirection();
}
protected void updateCoords(final Geopoint coordsIn) {
if (coordsIn == null || cacheCoords == null) {
return;
}
heading = coordsIn.bearingTo(cacheCoords);
updateDirection();
}
protected void updateDirection() {
if (compassArrow == null || compassArrow.isRecycled()) {
return;
}
// compass margins
int compassRoseWidth = compassArrow.getWidth();
int compassRoseHeight = compassArrow.getWidth();
int marginLeft = (getWidth() - compassRoseWidth) / 2;
int marginTop = (getHeight() - compassRoseHeight) / 2;
invalidate(marginLeft, marginTop, (marginLeft + compassRoseWidth), (marginTop + compassRoseHeight));
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
float azimuthRelative = azimuth - heading;
if (azimuthRelative < 0) {
azimuthRelative += 360;
} else if (azimuthRelative >= 360) {
azimuthRelative -= 360;
}
// compass margins
canvas.setDrawFilter(setfil);
int marginLeft;
int marginTop;
int compassArrowWidth = compassArrow.getWidth();
int compassArrowHeight = compassArrow.getWidth();
int canvasCenterX = (compassArrowWidth / 2) + ((getWidth() - compassArrowWidth) / 2);
int canvasCenterY = (compassArrowHeight / 2) + ((getHeight() - compassArrowHeight) / 2);
marginLeft = (getWidth() - compassArrowWidth) / 2;
marginTop = (getHeight() - compassArrowHeight) / 2;
canvas.rotate(-azimuthRelative, canvasCenterX, canvasCenterY);
canvas.drawBitmap(compassArrow, marginLeft, marginTop, null);
canvas.rotate(azimuthRelative, canvasCenterX, canvasCenterY);
canvas.setDrawFilter(remfil);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(measureWidth(widthMeasureSpec), measureHeight(heightMeasureSpec));
}
private int measureWidth(int measureSpec) {
int result;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
if (specMode == MeasureSpec.EXACTLY) {
result = specSize;
} else {
result = 21 + getPaddingLeft() + getPaddingRight();
if (specMode == MeasureSpec.AT_MOST) {
result = Math.min(result, specSize);
}
}
return result;
}
private int measureHeight(int measureSpec) {
int result;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
if (specMode == MeasureSpec.EXACTLY) {
result = specSize;
} else {
result = 21 + getPaddingTop() + getPaddingBottom();
if (specMode == MeasureSpec.AT_MOST) {
result = Math.min(result, specSize);
}
}
return result;
}
}
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