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vtm/vtm-android/src/org/oscim/android/MapScaleBar.java

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Java
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package org.oscim.android;
///*
// * Copyright 2010, 2011, 2012 mapsforge.org
// * Copyright 2013 Hannes Janetzek
// *
// * This program is free software: you can redistribute it and/or modify it under the
// * terms of the GNU Lesser General Public License as published by the Free Software
// * Foundation, either version 3 of the License, or (at your option) any later version.
// *
// * This program is distributed in the hope that it will be useful, but WITHOUT ANY
// * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
// * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
// *
// * You should have received a copy of the GNU Lesser General Public License along with
// * this program. If not, see <http://www.gnu.org/licenses/>.
// */
//package org.oscim.layers.overlay;
//
//import java.util.HashMap;
//import java.util.Map;
//
//import org.oscim.core.MapPosition;
//import org.oscim.core.MercatorProjection;
//import org.oscim.layers.Layer;
//import org.oscim.renderer.layers.BitmapRenderLayer;
//import org.oscim.view.MapView;
//
//import android.graphics.Bitmap;
//import android.graphics.Canvas;
//import android.graphics.Color;
//import android.graphics.Paint;
//import android.graphics.Typeface;
//
///**
// * A MapScaleBar displays the ratio of a distance on the map to the
// * corresponding distance on the ground.
// */
//public class MapScaleBar extends Layer {
//
// private static final int BITMAP_HEIGHT = 64;
// private static final int BITMAP_WIDTH = 128;
// private static final double LATITUDE_REDRAW_THRESHOLD = 0.2;
// // private static final int MARGIN_BOTTOM = 5;
// // private static final int MARGIN_LEFT = 5;
//
// private static final double METER_FOOT_RATIO = 0.3048;
// private static final int ONE_KILOMETER = 1000;
// private static final int ONE_MILE = 5280;
//
// private static final Paint SCALE_BAR = new Paint(Paint.ANTI_ALIAS_FLAG);
// private static final Paint SCALE_BAR_STROKE = new Paint(Paint.ANTI_ALIAS_FLAG);
// private static final Paint SCALE_TEXT = new Paint(Paint.ANTI_ALIAS_FLAG);
// private static final Paint SCALE_TEXT_STROKE = new Paint(Paint.ANTI_ALIAS_FLAG);
//
// private static final int[] SCALE_BAR_VALUES_IMPERIAL = {
// 26400000, 10560000, 5280000,
// 2640000, 1056000, 528000,
// 264000, 105600, 52800, 26400,
// 10560, 5280, 2000, 1000, 500,
// 200, 100, 50, 20,
// 10, 5, 2, 1 };
// private static final int[] SCALE_BAR_VALUES_METRIC = {
// 10000000, 5000000, 2000000, 1000000,
// 500000, 200000, 100000, 50000,
// 20000, 10000, 5000, 2000, 1000,
// 500, 200, 100, 50, 20, 10, 5, 2, 1 };
//
// private boolean mImperialUnits;
// private final Canvas mMapScaleCanvas;
// private boolean mRedrawNeeded;
// private double mPrevLatitude = -1;
// private final double mPrevScale = -1;
// private final Map<TextField, String> mTextFields;
//
// private final Bitmap mMapScaleBitmap;
// private final BitmapRenderLayer mBitmapLayer;
//
// public MapScaleBar(MapView map) {
// super(map);
//
// mMapScaleBitmap = Bitmap.createBitmap(
// BITMAP_WIDTH, BITMAP_HEIGHT,
// Bitmap.Config.ARGB_8888);
//
// mMapScaleCanvas = new Canvas(mMapScaleBitmap);
// mTextFields = new HashMap<TextField, String>();
//
// setDefaultTexts();
// configurePaints();
//
// mRedrawNeeded = true;
// mLayer = mBitmapLayer = new BitmapRenderLayer(map);
// mBitmapLayer.setBitmap(mMapScaleBitmap, 0, 0,
// (int)(BITMAP_WIDTH * 1.2f),
// (int)(BITMAP_HEIGHT * 1.2f));
// }
//
// @Override
// public void onUpdate(MapPosition mapPosition, boolean changed, boolean clear) {
// double latitude = MercatorProjection.toLatitude(mapPosition.y);
//
// if (!mRedrawNeeded) {
// double scaleDiff = mPrevScale / mapPosition.scale;
// if (scaleDiff < 1.1 && scaleDiff > 0.9) {
// double latitudeDiff = Math.abs(mPrevLatitude - latitude);
// if (latitudeDiff < LATITUDE_REDRAW_THRESHOLD)
// return;
// }
// }
// mPrevLatitude = latitude;
//
// double groundResolution = MercatorProjection.calculateGroundResolution(
// latitude, mapPosition.scale);
//
// int[] scaleBarValues;
// if (mImperialUnits) {
// groundResolution = groundResolution / METER_FOOT_RATIO;
// scaleBarValues = SCALE_BAR_VALUES_IMPERIAL;
// } else {
// scaleBarValues = SCALE_BAR_VALUES_METRIC;
// }
//
// float scaleBarLength = 0;
// int mapScaleValue = 0;
//
// for (int i = 0; i < scaleBarValues.length; ++i) {
// mapScaleValue = scaleBarValues[i];
// scaleBarLength = mapScaleValue / (float) groundResolution;
// if (scaleBarLength < (BITMAP_WIDTH - 10)) {
// break;
// }
// }
// synchronized (mMapScaleBitmap) {
// redrawMapScaleBitmap(scaleBarLength, mapScaleValue);
// }
//
// mBitmapLayer.updateBitmap();
//
// mRedrawNeeded = false;
// }
//
// /**
// * @return true if imperial units are used, false otherwise.
// */
// public boolean isImperialUnits() {
// return mImperialUnits;
// }
//
// /**
// * @param imperialUnits
// * true if imperial units should be used rather than metric
// * units.
// */
// public void setImperialUnits(boolean imperialUnits) {
// mImperialUnits = imperialUnits;
// mRedrawNeeded = true;
// }
//
// /**
// * Overrides the specified text field with the given string.
// *
// * @param textField
// * the text field to override.
// * @param value
// * the new value of the text field.
// */
// public void setText(TextField textField, String value) {
// mTextFields.put(textField, value);
// mRedrawNeeded = true;
// }
//
// private void drawScaleBar(float scaleBarLength, Paint paint) {
// mMapScaleCanvas.drawLine(7, 25, scaleBarLength + 3, 25, paint);
// mMapScaleCanvas.drawLine(5, 10, 5, 40, paint);
// mMapScaleCanvas.drawLine(scaleBarLength + 5, 10, scaleBarLength + 5, 40, paint);
// }
//
// private void drawScaleText(int scaleValue, String unitSymbol, Paint paint) {
// mMapScaleCanvas.drawText(scaleValue + unitSymbol, 12, 18, paint);
// }
//
// /**
// * Redraws the map scale bitmap with the given parameters.
// *
// * @param scaleBarLength
// * the length of the map scale bar in pixels.
// * @param mapScaleValue
// * the map scale value in meters.
// */
// private void redrawMapScaleBitmap(float scaleBarLength, int mapScaleValue) {
// mMapScaleBitmap.eraseColor(Color.TRANSPARENT);
//
// // draw the scale bar
// drawScaleBar(scaleBarLength, SCALE_BAR_STROKE);
// drawScaleBar(scaleBarLength, SCALE_BAR);
//
// int scaleValue;
// String unitSymbol;
// if (mImperialUnits) {
// if (mapScaleValue < ONE_MILE) {
// scaleValue = mapScaleValue;
// unitSymbol = mTextFields.get(TextField.FOOT);
// } else {
// scaleValue = mapScaleValue / ONE_MILE;
// unitSymbol = mTextFields.get(TextField.MILE);
// }
// } else {
// if (mapScaleValue < ONE_KILOMETER) {
// scaleValue = mapScaleValue;
// unitSymbol = mTextFields.get(TextField.METER);
// } else {
// scaleValue = mapScaleValue / ONE_KILOMETER;
// unitSymbol = mTextFields.get(TextField.KILOMETER);
// }
// }
//
// // draw the scale text
// drawScaleText(scaleValue, unitSymbol, SCALE_TEXT_STROKE);
// drawScaleText(scaleValue, unitSymbol, SCALE_TEXT);
// }
//
// private void setDefaultTexts() {
// mTextFields.put(TextField.FOOT, " ft");
// mTextFields.put(TextField.MILE, " mi");
//
// mTextFields.put(TextField.METER, " m");
// mTextFields.put(TextField.KILOMETER, " km");
// }
//
// private static void configurePaints() {
// SCALE_BAR.setStrokeWidth(2);
// SCALE_BAR.setStrokeCap(Paint.Cap.SQUARE);
// SCALE_BAR.setColor(Color.BLACK);
// SCALE_BAR_STROKE.setStrokeWidth(5);
// SCALE_BAR_STROKE.setStrokeCap(Paint.Cap.SQUARE);
// SCALE_BAR_STROKE.setColor(Color.WHITE);
//
// SCALE_TEXT.setTypeface(Typeface.defaultFromStyle(Typeface.BOLD));
// SCALE_TEXT.setTextSize(17);
// SCALE_TEXT.setColor(Color.BLACK);
// SCALE_TEXT_STROKE.setTypeface(Typeface.defaultFromStyle(Typeface.BOLD));
// SCALE_TEXT_STROKE.setStyle(Paint.Style.STROKE);
// SCALE_TEXT_STROKE.setColor(Color.WHITE);
// SCALE_TEXT_STROKE.setStrokeWidth(2);
// SCALE_TEXT_STROKE.setTextSize(17);
// }
//
// /**
// * Enumeration of all text fields.
// */
// public enum TextField {
// /**
// * Unit symbol for one foot.
// */
// FOOT,
//
// /**
// * Unit symbol for one kilometer.
// */
// KILOMETER,
//
// /**
// * Unit symbol for one meter.
// */
// METER,
//
// /**
// * Unit symbol for one mile.
// */
// MILE;
// }
//}
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