1 files changed, 130 insertions, 0 deletions
diff --git a/main/src/cgeo/geocaching/maps/DistanceDrawer.java b/main/src/cgeo/geocaching/maps/DistanceDrawer.java
new file mode 100644
index 0000000..9dde8e6
--- /dev/null
+++ b/main/src/cgeo/geocaching/maps/DistanceDrawer.java
@@ -0,0 +1,130 @@
+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 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 location) {
+        final Geopoint currentCoords = new Geopoint(location);
+
+        final float distance = currentCoords.distanceTo(destinationCoords);
+        distanceText = Units.getDistanceFromKilometers(distance);
+    }
+
+    void drawDistance(final Canvas canvas) {
+        if (distanceText == 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);
+    }
+}