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An Android library to display OpenStreetMap views.
// Created by plusminus on 21:37:08 - 27.09.2008
package org.osmdroid.views;
import microsoft.mappoint.TileSystem;
import org.osmdroid.api.IGeoPoint;
import org.osmdroid.api.IMapController;
import org.osmdroid.util.BoundingBoxE6;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.util.MyMath;
import org.osmdroid.views.util.constants.MapViewConstants;
import org.osmdroid.views.util.constants.MathConstants;
import android.graphics.Point;
/**
*
* @author Nicolas Gramlich
*/
public class MapController implements IMapController, MapViewConstants {
// ===========================================================
// Constants
// ===========================================================
// ===========================================================
// Fields
// ===========================================================
private final MapView mOsmv;
private AbstractAnimationRunner mCurrentAnimationRunner;
// ===========================================================
// Constructors
// ===========================================================
public MapController(final MapView osmv) {
this.mOsmv = osmv;
}
// ===========================================================
// Getter & Setter
// ===========================================================
// ===========================================================
// Methods from SuperClass/Interfaces
// ===========================================================
// ===========================================================
// Methods
// ===========================================================
public void zoomToSpan(final BoundingBoxE6 bb) {
zoomToSpan(bb.getLatitudeSpanE6(), bb.getLongitudeSpanE6());
}
// TODO rework zoomToSpan
@Override
public void zoomToSpan(final int reqLatSpan, final int reqLonSpan) {
if (reqLatSpan <= 0 || reqLonSpan <= 0) {
return;
}
final BoundingBoxE6 bb = this.mOsmv.getBoundingBox();
final int curZoomLevel = this.mOsmv.getZoomLevel();
final int curLatSpan = bb.getLatitudeSpanE6();
final int curLonSpan = bb.getLongitudeSpanE6();
final float diffNeededLat = (float) reqLatSpan / curLatSpan; // i.e. 600/500 = 1,2
final float diffNeededLon = (float) reqLonSpan / curLonSpan; // i.e. 300/400 = 0,75
final float diffNeeded = Math.max(diffNeededLat, diffNeededLon); // i.e. 1,2
if (diffNeeded > 1) { // Zoom Out
this.mOsmv.setZoomLevel(curZoomLevel - MyMath.getNextSquareNumberAbove(diffNeeded));
} else if (diffNeeded < 0.5) { // Can Zoom in
this.mOsmv.setZoomLevel(curZoomLevel + MyMath.getNextSquareNumberAbove(1 / diffNeeded)
- 1);
}
}
/**
* Start animating the map towards the given point.
*/
@Override
public void animateTo(final IGeoPoint point) {
animateTo(point.getLatitudeE6() / 1E6, point.getLongitudeE6() / 1E6);
}
/**
* Start animating the map towards the given point.
*/
public void animateTo(final double latitude, final double longitude) {
final int x = mOsmv.getScrollX();
final int y = mOsmv.getScrollY();
final Point p = TileSystem.LatLongToPixelXY(latitude, longitude, mOsmv.getZoomLevel(), null);
final int worldSize_2 = TileSystem.MapSize(mOsmv.getZoomLevel()) / 2;
mOsmv.getScroller().startScroll(x, y, p.x - worldSize_2 - x, p.y - worldSize_2 - y,
ANIMATION_DURATION_DEFAULT);
mOsmv.postInvalidate();
}
/**
* Animates the underlying {@link MapView} that it centers the passed {@link GeoPoint} in the
* end. Uses: {@link MapController.ANIMATION_SMOOTHNESS_DEFAULT} and
* {@link MapController.ANIMATION_DURATION_DEFAULT}.
*
* @param gp
*/
public void animateTo(final GeoPoint gp, final AnimationType aAnimationType) {
animateTo(gp.getLatitudeE6(), gp.getLongitudeE6(), aAnimationType,
ANIMATION_DURATION_DEFAULT, ANIMATION_SMOOTHNESS_DEFAULT);
}
/**
* Animates the underlying {@link MapView} that it centers the passed {@link GeoPoint} in the
* end.
*
* @param gp
* GeoPoint to be centered in the end.
* @param aSmoothness
* steps made during animation. I.e.: {@link MapController.ANIMATION_SMOOTHNESS_LOW},
* {@link MapController.ANIMATION_SMOOTHNESS_DEFAULT},
* {@link MapController.ANIMATION_SMOOTHNESS_HIGH}
* @param aDuration
* in Milliseconds. I.e.: {@link MapController.ANIMATION_DURATION_SHORT},
* {@link MapController.ANIMATION_DURATION_DEFAULT},
* {@link MapController.ANIMATION_DURATION_LONG}
*/
public void animateTo(final GeoPoint gp, final AnimationType aAnimationType,
final int aSmoothness, final int aDuration) {
animateTo(gp.getLatitudeE6(), gp.getLongitudeE6(), aAnimationType, aSmoothness, aDuration);
}
/**
* Animates the underlying {@link MapView} that it centers the passed coordinates in the end.
* Uses: {@link MapController.ANIMATION_SMOOTHNESS_DEFAULT} and
* {@link MapController.ANIMATION_DURATION_DEFAULT}.
*
* @param aLatitudeE6
* @param aLongitudeE6
*/
public void animateTo(final int aLatitudeE6, final int aLongitudeE6,
final AnimationType aAnimationType) {
animateTo(aLatitudeE6, aLongitudeE6, aAnimationType, ANIMATION_SMOOTHNESS_DEFAULT,
ANIMATION_DURATION_DEFAULT);
}
/**
* Animates the underlying {@link MapView} that it centers the passed coordinates in the end.
*
* @param aLatitudeE6
* @param aLongitudeE6
* @param aSmoothness
* steps made during animation. I.e.: {@link MapController.ANIMATION_SMOOTHNESS_LOW},
* {@link MapController.ANIMATION_SMOOTHNESS_DEFAULT},
* {@link MapController.ANIMATION_SMOOTHNESS_HIGH}
* @param aDuration
* in Milliseconds. I.e.: {@link MapController.ANIMATION_DURATION_SHORT},
* {@link MapController.ANIMATION_DURATION_DEFAULT},
* {@link MapController.ANIMATION_DURATION_LONG}
*/
public void animateTo(final int aLatitudeE6, final int aLongitudeE6,
final AnimationType aAnimationType, final int aSmoothness, final int aDuration) {
this.stopAnimation(false);
switch (aAnimationType) {
case LINEAR:
this.mCurrentAnimationRunner = new LinearAnimationRunner(aLatitudeE6, aLongitudeE6,
aSmoothness, aDuration);
break;
case EXPONENTIALDECELERATING:
this.mCurrentAnimationRunner = new ExponentialDeceleratingAnimationRunner(aLatitudeE6,
aLongitudeE6, aSmoothness, aDuration);
break;
case QUARTERCOSINUSALDECELERATING:
this.mCurrentAnimationRunner = new QuarterCosinusalDeceleratingAnimationRunner(
aLatitudeE6, aLongitudeE6, aSmoothness, aDuration);
break;
case HALFCOSINUSALDECELERATING:
this.mCurrentAnimationRunner = new HalfCosinusalDeceleratingAnimationRunner(
aLatitudeE6, aLongitudeE6, aSmoothness, aDuration);
break;
case MIDDLEPEAKSPEED:
this.mCurrentAnimationRunner = new MiddlePeakSpeedAnimationRunner(aLatitudeE6,
aLongitudeE6, aSmoothness, aDuration);
break;
}
this.mCurrentAnimationRunner.start();
}
public void scrollBy(final int x, final int y) {
this.mOsmv.scrollBy(x, y);
}
/**
* Set the map view to the given center. There will be no animation.
*/
@Override
public void setCenter(final IGeoPoint point) {
final Point p = TileSystem.LatLongToPixelXY(point.getLatitudeE6() / 1E6,
point.getLongitudeE6() / 1E6, this.mOsmv.getZoomLevel(), null);
final int worldSize_2 = TileSystem.MapSize(this.mOsmv.getZoomLevel()) / 2;
this.mOsmv.scrollTo(p.x - worldSize_2, p.y - worldSize_2);
}
/**
* Stops a running animation.
*
* @param jumpToTarget
*/
public void stopAnimation(final boolean jumpToTarget) {
final AbstractAnimationRunner currentAnimationRunner = this.mCurrentAnimationRunner;
if (currentAnimationRunner != null && !currentAnimationRunner.isDone()) {
currentAnimationRunner.interrupt();
if (jumpToTarget) {
setCenter(new GeoPoint(currentAnimationRunner.mTargetLatitudeE6,
currentAnimationRunner.mTargetLongitudeE6));
}
}
}
@Override
public int setZoom(final int zoomlevel) {
return mOsmv.setZoomLevel(zoomlevel);
}
/**
* Zoom in by one zoom level.
*/
@Override
public boolean zoomIn() {
return mOsmv.zoomIn();
}
public boolean zoomInFixing(final GeoPoint point) {
return mOsmv.zoomInFixing(point);
}
@Override
public boolean zoomInFixing(final int xPixel, final int yPixel) {
return mOsmv.zoomInFixing(xPixel, yPixel);
}
/**
* Zoom out by one zoom level.
*/
@Override
public boolean zoomOut() {
return mOsmv.zoomOut();
}
public boolean zoomOutFixing(final GeoPoint point) {
return mOsmv.zoomOutFixing(point);
}
@Override
public boolean zoomOutFixing(final int xPixel, final int yPixel) {
return mOsmv.zoomOutFixing(xPixel, yPixel);
}
// ===========================================================
// Inner and Anonymous Classes
// ===========================================================
/**
* Choose on of the Styles of approacing the target Coordinates.
*
* LINEAR
*
* - Uses ses linear interpolation
* - Values produced: 10%, 20%, 30%, 40%, 50%, ...
* - Style: Always average speed.
*
* EXPONENTIALDECELERATING
*
* - Uses a exponential interpolation/li>
*
- Values produced: 50%, 75%, 87.5%, 93.5%, ...
* - Style: Starts very fast, really slow in the end.
*
* QUARTERCOSINUSALDECELERATING
*
* - Uses the first quarter of the cos curve (from zero to PI/2) for interpolation.
* - Values produced: See cos curve :)
* - Style: Average speed, slows out medium.
*
* HALFCOSINUSALDECELERATING
*
* - Uses the first half of the cos curve (from zero to PI) for interpolation
* - Values produced: See cos curve :)
* - Style: Average speed, slows out smoothly.
*
* MIDDLEPEAKSPEED
*
* - Uses the values of cos around the 0 (from -PI/2 to +PI/2) for interpolation
* - Values produced: See cos curve :)
* - Style: Starts medium, speeds high in middle, slows out medium.
*
*
*/
public static enum AnimationType {
/**
*
* LINEAR
*
* - Uses ses linear interpolation
* - Values produced: 10%, 20%, 30%, 40%, 50%, ...
* - Style: Always average speed.
*
*
*/
LINEAR,
/**
*
* EXPONENTIALDECELERATING
*
* - Uses a exponential interpolation/li>
*
- Values produced: 50%, 75%, 87.5%, 93.5%, ...
* - Style: Starts very fast, really slow in the end.
*
*
*/
EXPONENTIALDECELERATING,
/**
*
* QUARTERCOSINUSALDECELERATING
*
* - Uses the first quarter of the cos curve (from zero to PI/2) for interpolation.
* - Values produced: See cos curve :)
* - Style: Average speed, slows out medium.
*
*
*/
QUARTERCOSINUSALDECELERATING,
/**
*
* HALFCOSINUSALDECELERATING
*
* - Uses the first half of the cos curve (from zero to PI) for interpolation
* - Values produced: See cos curve :)
* - Style: Average speed, slows out smoothly.
*
*
*/
HALFCOSINUSALDECELERATING,
/**
*
* MIDDLEPEAKSPEED
*
* - Uses the values of cos around the 0 (from -PI/2 to +PI/2) for interpolation
* - Values produced: See cos curve :)
* - Style: Starts medium, speeds high in middle, slows out medium.
*
*
*/
MIDDLEPEAKSPEED;
}
private abstract class AbstractAnimationRunner extends Thread {
// ===========================================================
// Fields
// ===========================================================
protected final int mSmoothness;
protected final int mTargetLatitudeE6, mTargetLongitudeE6;
protected boolean mDone = false;
protected final int mStepDuration;
protected final int mPanTotalLatitudeE6, mPanTotalLongitudeE6;
// ===========================================================
// Constructors
// ===========================================================
@SuppressWarnings("unused")
public AbstractAnimationRunner(final MapController mapViewController,
final int aTargetLatitudeE6, final int aTargetLongitudeE6) {
this(aTargetLatitudeE6, aTargetLongitudeE6,
MapViewConstants.ANIMATION_SMOOTHNESS_DEFAULT,
MapViewConstants.ANIMATION_DURATION_DEFAULT);
}
public AbstractAnimationRunner(final int aTargetLatitudeE6, final int aTargetLongitudeE6,
final int aSmoothness, final int aDuration) {
this.mTargetLatitudeE6 = aTargetLatitudeE6;
this.mTargetLongitudeE6 = aTargetLongitudeE6;
this.mSmoothness = aSmoothness;
this.mStepDuration = aDuration / aSmoothness;
/* Get the current mapview-center. */
final MapView mapview = MapController.this.mOsmv;
final IGeoPoint mapCenter = mapview.getMapCenter();
this.mPanTotalLatitudeE6 = mapCenter.getLatitudeE6() - aTargetLatitudeE6;
this.mPanTotalLongitudeE6 = mapCenter.getLongitudeE6() - aTargetLongitudeE6;
}
@Override
public void run() {
onRunAnimation();
this.mDone = true;
}
public boolean isDone() {
return this.mDone;
}
public abstract void onRunAnimation();
}
private class LinearAnimationRunner extends AbstractAnimationRunner {
// ===========================================================
// Fields
// ===========================================================
protected final int mPanPerStepLatitudeE6, mPanPerStepLongitudeE6;
// ===========================================================
// Constructors
// ===========================================================
@SuppressWarnings("unused")
public LinearAnimationRunner(final int aTargetLatitudeE6, final int aTargetLongitudeE6) {
this(aTargetLatitudeE6, aTargetLongitudeE6, ANIMATION_SMOOTHNESS_DEFAULT,
ANIMATION_DURATION_DEFAULT);
}
public LinearAnimationRunner(final int aTargetLatitudeE6, final int aTargetLongitudeE6,
final int aSmoothness, final int aDuration) {
super(aTargetLatitudeE6, aTargetLongitudeE6, aSmoothness, aDuration);
/* Get the current mapview-center. */
final MapView mapview = MapController.this.mOsmv;
final IGeoPoint mapCenter = mapview.getMapCenter();
this.mPanPerStepLatitudeE6 = (mapCenter.getLatitudeE6() - aTargetLatitudeE6)
/ aSmoothness;
this.mPanPerStepLongitudeE6 = (mapCenter.getLongitudeE6() - aTargetLongitudeE6)
/ aSmoothness;
this.setName("LinearAnimationRunner");
}
// ===========================================================
// Methods from SuperClass/Interfaces
// ===========================================================
@Override
public void onRunAnimation() {
final MapView mapview = MapController.this.mOsmv;
final IGeoPoint mapCenter = mapview.getMapCenter();
final int panPerStepLatitudeE6 = this.mPanPerStepLatitudeE6;
final int panPerStepLongitudeE6 = this.mPanPerStepLongitudeE6;
final int stepDuration = this.mStepDuration;
try {
int newMapCenterLatE6;
int newMapCenterLonE6;
for (int i = this.mSmoothness; i > 0; i--) {
newMapCenterLatE6 = mapCenter.getLatitudeE6() - panPerStepLatitudeE6;
newMapCenterLonE6 = mapCenter.getLongitudeE6() - panPerStepLongitudeE6;
mapview.setMapCenter(newMapCenterLatE6, newMapCenterLonE6);
Thread.sleep(stepDuration);
}
} catch (final Exception e) {
this.interrupt();
}
}
}
private class ExponentialDeceleratingAnimationRunner extends AbstractAnimationRunner {
// ===========================================================
// Fields
// ===========================================================
// ===========================================================
// Constructors
// ===========================================================
@SuppressWarnings("unused")
public ExponentialDeceleratingAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6) {
this(aTargetLatitudeE6, aTargetLongitudeE6, ANIMATION_SMOOTHNESS_DEFAULT,
ANIMATION_DURATION_DEFAULT);
}
public ExponentialDeceleratingAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6, final int aSmoothness, final int aDuration) {
super(aTargetLatitudeE6, aTargetLongitudeE6, aSmoothness, aDuration);
this.setName("ExponentialDeceleratingAnimationRunner");
}
// ===========================================================
// Methods from SuperClass/Interfaces
// ===========================================================
@Override
public void onRunAnimation() {
final MapView mapview = MapController.this.mOsmv;
final IGeoPoint mapCenter = mapview.getMapCenter();
final int stepDuration = this.mStepDuration;
try {
int newMapCenterLatE6;
int newMapCenterLonE6;
for (int i = 0; i < this.mSmoothness; i++) {
final double delta = Math.pow(0.5, i + 1);
final int deltaLatitudeE6 = (int) (this.mPanTotalLatitudeE6 * delta);
final int detlaLongitudeE6 = (int) (this.mPanTotalLongitudeE6 * delta);
newMapCenterLatE6 = mapCenter.getLatitudeE6() - deltaLatitudeE6;
newMapCenterLonE6 = mapCenter.getLongitudeE6() - detlaLongitudeE6;
mapview.setMapCenter(newMapCenterLatE6, newMapCenterLonE6);
Thread.sleep(stepDuration);
}
mapview.setMapCenter(super.mTargetLatitudeE6, super.mTargetLongitudeE6);
} catch (final Exception e) {
this.interrupt();
}
}
}
private class CosinusalBasedAnimationRunner extends AbstractAnimationRunner implements
MathConstants {
// ===========================================================
// Fields
// ===========================================================
protected final float mStepIncrement, mAmountStretch;
protected final float mYOffset, mStart;
// ===========================================================
// Constructors
// ===========================================================
@SuppressWarnings("unused")
public CosinusalBasedAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6, final float aStart, final float aRange,
final float aYOffset) {
this(aTargetLatitudeE6, aTargetLongitudeE6, ANIMATION_SMOOTHNESS_DEFAULT,
ANIMATION_DURATION_DEFAULT, aStart, aRange, aYOffset);
}
public CosinusalBasedAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6, final int aSmoothness, final int aDuration,
final float aStart, final float aRange, final float aYOffset) {
super(aTargetLatitudeE6, aTargetLongitudeE6, aSmoothness, aDuration);
this.mYOffset = aYOffset;
this.mStart = aStart;
this.mStepIncrement = aRange / aSmoothness;
/* We need to normalize the amount in the end, so wee need the the: sum^(-1) . */
float amountSum = 0;
for (int i = 0; i < aSmoothness; i++) {
amountSum += aYOffset + Math.cos(this.mStepIncrement * i + aStart);
}
this.mAmountStretch = 1 / amountSum;
this.setName("QuarterCosinusalDeceleratingAnimationRunner");
}
// ===========================================================
// Methods from SuperClass/Interfaces
// ===========================================================
@Override
public void onRunAnimation() {
final MapView mapview = MapController.this.mOsmv;
final IGeoPoint mapCenter = mapview.getMapCenter();
final int stepDuration = this.mStepDuration;
final float amountStretch = this.mAmountStretch;
try {
int newMapCenterLatE6;
int newMapCenterLonE6;
for (int i = 0; i < this.mSmoothness; i++) {
final double delta = (this.mYOffset + Math.cos(this.mStepIncrement * i
+ this.mStart))
* amountStretch;
final int deltaLatitudeE6 = (int) (this.mPanTotalLatitudeE6 * delta);
final int deltaLongitudeE6 = (int) (this.mPanTotalLongitudeE6 * delta);
newMapCenterLatE6 = mapCenter.getLatitudeE6() - deltaLatitudeE6;
newMapCenterLonE6 = mapCenter.getLongitudeE6() - deltaLongitudeE6;
mapview.setMapCenter(newMapCenterLatE6, newMapCenterLonE6);
Thread.sleep(stepDuration);
}
mapview.setMapCenter(super.mTargetLatitudeE6, super.mTargetLongitudeE6);
} catch (final Exception e) {
this.interrupt();
}
}
}
protected class QuarterCosinusalDeceleratingAnimationRunner extends
CosinusalBasedAnimationRunner implements MathConstants {
// ===========================================================
// Constructors
// ===========================================================
protected QuarterCosinusalDeceleratingAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6) {
this(aTargetLatitudeE6, aTargetLongitudeE6, ANIMATION_SMOOTHNESS_DEFAULT,
ANIMATION_DURATION_DEFAULT);
}
protected QuarterCosinusalDeceleratingAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6, final int aSmoothness, final int aDuration) {
super(aTargetLatitudeE6, aTargetLongitudeE6, aSmoothness, aDuration, 0, PI_2, 0);
}
}
protected class HalfCosinusalDeceleratingAnimationRunner extends CosinusalBasedAnimationRunner
implements MathConstants {
// ===========================================================
// Constructors
// ===========================================================
protected HalfCosinusalDeceleratingAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6) {
this(aTargetLatitudeE6, aTargetLongitudeE6, ANIMATION_SMOOTHNESS_DEFAULT,
ANIMATION_DURATION_DEFAULT);
}
protected HalfCosinusalDeceleratingAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6, final int aSmoothness, final int aDuration) {
super(aTargetLatitudeE6, aTargetLongitudeE6, aSmoothness, aDuration, 0, PI, 1);
}
}
protected class MiddlePeakSpeedAnimationRunner extends CosinusalBasedAnimationRunner implements
MathConstants {
// ===========================================================
// Constructors
// ===========================================================
protected MiddlePeakSpeedAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6) {
this(aTargetLatitudeE6, aTargetLongitudeE6, ANIMATION_SMOOTHNESS_DEFAULT,
ANIMATION_DURATION_DEFAULT);
}
protected MiddlePeakSpeedAnimationRunner(final int aTargetLatitudeE6,
final int aTargetLongitudeE6, final int aSmoothness, final int aDuration) {
super(aTargetLatitudeE6, aTargetLongitudeE6, aSmoothness, aDuration, -PI_2, PI, 0);
}
}
}
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