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package cgeo.geocaching.maps;
import cgeo.geocaching.CgeoApplication;
import cgeo.geocaching.location.Geopoint;
import cgeo.geocaching.location.Units;
import cgeo.geocaching.maps.interfaces.MapViewImpl;
import android.content.Context;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.location.Location;
import android.util.DisplayMetrics;
import android.view.WindowManager;
public class DistanceDrawer {
private Geopoint currentCoords;
private final Geopoint destinationCoords;
private Paint paintBox = null;
private Paint paintBoxShadow = null;
private Paint paintText = null;
private BlurMaskFilter blurBoxShadow = null;
private final boolean needsInvertedColors;
private float pixelDensity = 0;
private final float boxWidth, boxHeight, boxCornerRadius, boxShadowSize, boxPadding;
private final float textHeight, maxTextWidth;
private final float boxX, boxY;
private String distanceText = null;
public DistanceDrawer(final MapViewImpl mapView, final Geopoint destinationCoords) {
this.destinationCoords = destinationCoords;
final DisplayMetrics metrics = new DisplayMetrics();
final WindowManager windowManager = (WindowManager) CgeoApplication.getInstance().getSystemService(Context.WINDOW_SERVICE);
windowManager.getDefaultDisplay().getMetrics(metrics);
pixelDensity = metrics.density;
boxPadding = 2;
boxWidth = 100 * pixelDensity + 3 * boxPadding;
boxHeight = 30 * pixelDensity + 2 * boxPadding;
boxCornerRadius = 5 * pixelDensity;
boxShadowSize = 1 * pixelDensity;
textHeight = 20 * pixelDensity;
needsInvertedColors = mapView.needsInvertedColors();
boxX = metrics.widthPixels - boxWidth;
boxY = 0;
maxTextWidth = boxWidth - 3 * boxPadding;
}
public void setCoordinates(final Location coordinatesIn) {
currentCoords = new Geopoint(coordinatesIn);
final float distance = currentCoords.distanceTo(destinationCoords);
distanceText = Units.getDistanceFromKilometers(distance);
}
void drawDistance(final Canvas canvas) {
if (currentCoords == null) {
return;
}
if (blurBoxShadow == null) {
blurBoxShadow = new BlurMaskFilter(3, BlurMaskFilter.Blur.NORMAL);
paintBoxShadow = new Paint();
paintBoxShadow.setAntiAlias(true);
paintBoxShadow.setMaskFilter(blurBoxShadow);
paintBox = new Paint();
paintBox.setAntiAlias(true);
paintText = new Paint();
paintText.setAntiAlias(true);
paintText.setTextAlign(Paint.Align.LEFT);
paintText.setTypeface(Typeface.DEFAULT_BOLD);
final int TRANSPARENCY = 0x80000000;
if (needsInvertedColors) {
paintBoxShadow.setColor(0x000000 | TRANSPARENCY);
paintBox.setColor(0xFFFFFF | TRANSPARENCY);
paintText.setColor(0xFF000000);
} else {
paintBoxShadow.setColor(0xFFFFFF | TRANSPARENCY);
paintBox.setColor(0x000000 | TRANSPARENCY);
paintText.setColor(0xFFFFFFFF);
}
}
/* Calculate text size */
final Rect textBounds = new Rect();
paintText.setTextSize(textHeight);
paintText.getTextBounds(distanceText, 0, distanceText.length(), textBounds);
while (textBounds.height() > maxTextWidth) {
paintText.setTextSize(paintText.getTextSize() - 1);
paintText.getTextBounds(distanceText, 0, distanceText.length(), textBounds);
}
final float textX = (boxWidth - 3 * boxPadding - textBounds.width()) / 2 + boxX + 2 * boxPadding;
final float textY = (boxHeight + textBounds.height()) / 2 + boxY;
/* Paint background box */
canvas.drawRoundRect(
new RectF(
boxX - boxShadowSize, boxY - boxShadowSize - boxCornerRadius,
boxX + boxWidth + boxShadowSize + boxCornerRadius, boxY + boxHeight + boxShadowSize
),
boxCornerRadius, boxCornerRadius,
paintBoxShadow
);
canvas.drawRoundRect(
new RectF(
boxX, boxY - boxCornerRadius,
boxX + boxWidth + boxCornerRadius, boxY + boxHeight
),
boxCornerRadius, boxCornerRadius,
paintBox
);
/* Paint distance */
canvas.drawText(distanceText, textX, textY, paintText);
}
}
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